fix: the web service answers /, /status and /status/full again while IKEv2 runs.

ADR.md

@@ -46,7 +46,7 @@ and as a Tailwind CSS page for a browser, and `/status` is the same status as JS
 much as `web.status_content` says, since the router is reachable from the internet and the
 operator decides how much it tells strangers: `basic`, the default because it tells the least,
 the overall status and the Client IP, `standard` also the package versions and the number of
-active and other services, and `full` also each service and the state of the site-to-site, road-warrior, OpenVPN and
+active and other services, and `full` also each service and the state of the site-to-site, IKEv2, OpenVPN and
 WireGuard features. The Client IP is the address the request came from, through the trusted
 proxies, so a person can see the address the router sees. Nothing comes from the configuration.
 `/status` names its content, so clients such as manage-ui and the Router Manager show what it
@@ -98,8 +98,8 @@ Context: OpenVPN needs user accounts with passwords, and the users are meant to
 system of the router, including IKEv2 EAP-TLS and WireGuard, which an OIDC provider cannot
 authenticate. Everything the router runs comes from the Ubuntu archive. slapd, its Python module
 `python3-ldap` and the OpenVPN plugin `openvpn-auth-ldap` are all in the archive; the plugin
-checks a password by binding as the user, so the hash scheme is slapd's alone. An OIDC provider
-can read the directory through its LDAP connector.
+checks a password by binding as the user, so the hash scheme is slapd's alone. The router's own
+OpenID Provider (ADR-37) signs the directory's users in to other systems.
 
 Decision: The users are entries in slapd. The package keeps its own database,
 `dc=vpn-router,dc=local` in `/var/lib/ldap/vpn-router` (the path the slapd AppArmor profile
@@ -394,8 +394,8 @@ failure, then listens. `vpnrouter_auth` turns every failure of the database into
 psycopg (Ubuntu ships only its pure-Python implementation) finds libpq through the dynamic linker
 cache, which dpkg refreshes with its deferred `ldconfig` only at the end of an installation, so a
 service started during the installation cannot import it yet; a failed import cannot be repeated
-in the same process either, as psycopg caches the lookup. The services therefore import psycopg
-plainly, and their units wait instead: `ExecStartPre=wait-for-libpq`, a shell script of each
+in the same process either, as psycopg caches the lookup. The services and `vpn-router-setup`
+therefore import psycopg plainly, and their units wait instead: `ExecStartPre=wait-for-libpq`, a shell script of each
 package, waits until `ldconfig -p` lists `libpq.so.5`, within `TimeoutStartSec=5min`. The
 maintainer scripts start the units with `systemctl --no-block` (debhelper's start is turned off),
 because a start that waited would hold dpkg before its `ldconfig`.
@@ -458,7 +458,7 @@ refresh tokens after the operations of `vpnrouter_auth.REVOKING`.
 
 Consequences: A Manager-only account cannot become a VPN user, as LDAP cannot change an entry's
 structural class and its password hash cannot be copied; it is removed and added again instead.
-It has no certificate, so OpenVPN and road-warrior access refuse it. The administrator's password
+It has no certificate, so OpenVPN and IKEv2 access refuse it. The administrator's password
 is on disk only until setup has run.
 
 ## ADR-19: The package has an LDAP schema of its own under a UUID OID
@@ -655,8 +655,8 @@ one, so its name is the one the tunnel always had.
 - **Local settings per connection:** each connection has its own `local_cidrs` and
   `local_id_mode`, as each peer expects its own traffic selectors and identity. `wan.local_fqdn`
   stays the router's one name, used by the `fqdn` mode, resolved once for the `public_ip` mode,
-  and used by HTTPS, road-warrior and OpenVPN. `local.cidrs` stays the subnets the router
-  routes, masquerades and offers to road-warrior and OpenVPN clients.
+  and used by HTTPS, IKEv2 and OpenVPN. `local.cidrs` stays the subnets the router
+  routes, masquerades and offers to IKEv2 and OpenVPN clients.
 - **One file:** `vpn-router-setup` writes every connection that is ready to
   `/etc/swanctl/conf.d/site-to-site.conf`, with the proposals and timers the one tunnel had, and
   removes the file when none is. The NAT exemptions pair each connection's `local_cidrs` with its
@@ -766,9 +766,9 @@ signs the requester's CSR, or makes the key and returns it once in a PKCS#12 fil
 the certificate, so a key it gave away cannot leak from it later. The PKCS#12 file uses 3DES and
 SHA-1 MACs, the encryption the key stores of Windows and macOS import. strongSwan reads only the
 first certificate of a PEM file, so each CA has a file of its own in `/etc/swanctl/x509ca`;
-road-warrior and site-to-site name their CA in `cacerts`, which restricts the trust chain to it.
+IKEv2 access and site-to-site name their CA in `cacerts`, which restricts the trust chain to it.
 
-Consequences: The P2S CA's certificates are accepted by road-warrior and OpenVPN only, the site-to-site CA's by
+Consequences: The P2S CA's certificates are accepted by IKEv2 and OpenVPN only, the site-to-site CA's by
 site-to-site only. With an offline root, new issuing CAs and the root CRL need the offline step,
 and a router whose P2S CA waits has no VPN server certificate and so no P2S access. The router
 keeps the users' keys, as the OpenVPN profile embeds them.
@@ -909,7 +909,10 @@ Manager cannot set it. The shell runs as the console account of the signed-in us
 it is never root and each administrator's shell is the administrator's own; a user without
 console login gets none. `POST /shell` signs the user in again with the password
 and TOTP code and gives a one-time ticket valid 30 seconds; a WebSocket on `GET /shell` with that
-ticket gets the shell. The WebSocket of RFC 6455 is implemented on the standard library inside the
+ticket gets the shell. Asking for the password and code at every opening of the page is tiresome,
+so within `web.shell_auth_timeout` minutes of the user's last sign-in or keystroke a ticket is given
+without them; the times are kept in the web service's memory only, so a restart asks again, and 0
+keeps the sign-in at every opening. The WebSocket of RFC 6455 is implemented on the standard library inside the
 web service's `http.server`, server side only, without extensions. `systemd-run --pty` starts the
 shell in a transient unit with a PAM login session, outside the sandbox, and `setsid --ctty`
 makes the terminal its controlling terminal so window sizes reach the shell. A shell idle for
@@ -942,10 +945,336 @@ so slapd's otp overlay and password policy apply as for the Router Manager: the
 by the code, and the lockout. Members of `vpn-router-console` get sudo with that password. SSH
 accepts it only while `ssh.ldap_login` is set, in a `Match Group` drop-in of sshd. Switching console
 login off keeps the `posixAccount`, hidden by nslcd's filter, so the uid and the home stay the
-user's; leaving `admins` switches it off.
+user's; leaving `admins` switches it off. A console reaches root through sudo, so a password alone
+must not open one: console login needs a TOTP token. Switching it on is refused without one, and
+the token is checked at use rather than only when it is switched on, because an administrator can
+remove it later: the shell's ticket and every minute of an open shell check it, nslcd's
+`pam_authz_search` requires `oathTOTPUser`, and removing the token ends the sessions of the user's
+own POSIX account.
 
 Consequences: Each administrator's shell, SSH session and sudo run as the administrator, logged
 under the administrator's name. The directory becomes part of the system's name service through
-nslcd, and the system knows only the accounts with console login on. A user enrolled for TOTP types
-the code after the password at the SSH and sudo prompts. Homes are created at the first login and
+nslcd, and the system knows only the accounts with console login on. The user types the code
+after the password at the SSH and sudo prompts. An administrator whose console login was switched
+on before the token was required is refused until enrolling. Homes are created at the first login and
 are not removed with the user. A password is changed through the directory, not with `passwd`.
+
+## ADR-35: WireGuard peers are the devices of the VPN users, kept in the directory
+
+Context: The WireGuard endpoint could be switched on from the Router Manager, but its peers were
+written by hand into `wg0.conf`, so nobody could connect without SSH. A peer is a P2S client like
+an OpenVPN or IKEv2 user, and one person may have several devices.
+
+Decision: A VPN user's entry holds the user's WireGuard peers in the multi-valued attribute
+`vpnRouterWireGuardPeer`, one value `<public key> <IP>[,<IP>...]` per device; the router never
+sees a private key. `PUT /users/<name>` replaces a user's peers after checking the keys, which
+are unique, and the IPs, which do not overlap another peer's or cover the router's address. Setup
+reads the peers of the users who are not disabled from the directory and writes them as a marked
+block of `[Peer]` sections into `wg0.conf`; sections outside the block, added by hand, stay. A
+change of the peers, and disabling, enabling or removing a user with peers, restart setup. The
+Router Manager adds and removes peers on the WireGuard tab of Remote access management, where the
+endpoint is, choosing the user for each.
+
+Consequences: Peers follow their users: disabling a user drops the user's devices, and the
+directory's backup holds them. A peer cannot exist without a VPN user. A change restarts
+`wg-quick@wg0` through setup, which briefly interrupts the other peers.
+
+## ADR-36: Passkeys sign in to the Router Manager and the OpenID Provider, verified by the router with python3-fido2
+
+Context: Typing the password and a TOTP code at every sign-in to the Router Manager is tedious.
+WebAuthn needs a browser, HTTPS and a domain name; OpenVPN, IKEv2, WireGuard, SSH and sudo have no
+browser, and the sudo PAM module for security keys needs the key at the router. The router signs
+users in (`/auth`) and keeps them in its directory. The standard library cannot read CBOR or COSE
+keys; Ubuntu packages Yubico's python-fido2 in noble (1.1) and resolute (2.0), whose server API is
+the same once the JSON mapping of WebAuthn Level 3 is switched on, which 2.0 always uses.
+
+Decision: A passkey is a discoverable credential with user verification of the relying party
+`wan.local_fqdn`, with the user name as its user handle, so the sign-in needs no name. The router
+registers and verifies passkeys with python3-fido2 in `vpnrouter_passkeys`; the origin must be
+HTTPS on that name, which python-fido2 checks. Each passkey is a JSON value of the multi-valued
+`vpnRouterPasskey` on the user's entry, with the public key only. Registration needs the current
+password and code, so a session alone cannot add a lasting way in; removal needs neither. A
+passkey sign-in gives the same tokens as `/auth`; as it binds no password, the router checks that
+the user is enabled, not locked and not a service account. The begun steps are kept in the web
+service's memory for 2 minutes. The browser converts the options and answers with
+`PublicKeyCredential.parseCreationOptionsFromJSON`, `parseRequestOptionsFromJSON` and `toJSON`.
+The OpenID Provider's sign-in page (ADR-37) takes a passkey the same way.
+
+Consequences: Passkeys are a convenience for the Router Manager and the OpenID Provider; the
+password and code stay for everything else, the shell included. A changed `wan.local_fqdn` orphans every passkey. The
+Router Manager on another name, or in development on `localhost`, cannot use them. Failed passkey
+sign-ins do not count towards the directory's lockout, but the sign-in calls are rate limited.
+Browsers without the JSON methods of WebAuthn Level 3 cannot add or use passkeys.
+
+## ADR-37: The web service is an OpenID Provider built on python3-oauthlib; its clients are service accounts
+
+Status: Accepted
+
+Context: Other systems, such as dashboards, should sign the router's users in with the directory's
+passwords, TOTP codes and passkeys, without a second user store. The Ubuntu archive has no
+packaged identity provider. `python3-oauthlib` and `python3-jwt` are in main for noble and
+resolute; oauthlib implements the OpenID Connect flows and leaves the checks, the storage and the
+ID token's signature to the application. `python3-authlib` and `python3-jwcrypto` are in universe
+only. The web service already checks passwords and passkeys, rate limits sign-ins and keeps
+tokens in PostgreSQL, and Caddy serves it over HTTPS on `wan.local_fqdn`. ADR-3's HS256 key must
+not leave the router, but a relying party verifies an ID token itself.
+
+Decision: The web service is the OpenID Provider, in `vpnrouter_oidc`, while `oidc.enabled` is
+true; its issuer is its HTTPS site, `https://<wan.local_fqdn>:<https.web_port>`, without the port
+on 443, and it answers the provider's paths only on `127.0.0.1`, where Caddy passes them. Only
+the authorization code flow with PKCE S256 and the refresh token grant are allowed. A client is a
+service account with redirect URIs, kept with the account in the new attributes
+`vpnRouterRedirectUri`, `vpnRouterPostLogoutRedirectUri` and `vpnRouterAllowedGroup` of
+`vpnRouterAccount`: its name is the client ID and its password the secret, checked with a bind.
+Allowed groups limit who may sign in; without them every user may. A registered client is
+trusted, so there is no consent page. The sign-in page is the web service's own, a Jinja2
+template with the password, the code and a passkey, so the provider works without the Router
+Manager. ID tokens are RS256, signed with an RSA key the web service makes on its first run
+(`/etc/vpn-router/oidc.key`), published as a JWK named by its RFC 7638 thumbprint; `sub` is the
+entry's `entryUUID`. Codes, access and refresh tokens and sessions are kept as their SHA-256 in
+the database of the refresh tokens, defined in `/usr/share/vpn-router/sql/oidc.sql` with
+procedures and functions the module calls; a process loads the file at its first connection. The
+operations that revoke the refresh tokens of `/auth` also revoke them, and every use of a code or
+token checks the user and the client's allowed groups again.
+
+Consequences: The package depends on `python3-oauthlib` and `python3-jwt`. The provider needs
+HTTPS, a public name and the web service. Clients are managed like service accounts, by the CLI,
+`/service-accounts` and the Router Manager; a group a client allows cannot be removed, and renaming
+it renames it in the clients. The signing key does not rotate; replacing it invalidates every ID
+token issued. Wrong client secrets lock the client like any account. The implicit and hybrid
+flows, dynamic client registration and public clients without a secret are not offered.
+
+## ADR-38: Bash completions are files per command in bash-completion's completions directory
+
+Status: Accepted
+
+Context: The `vpn-*` commands have many subcommands, options and names (users, groups, issuing
+CAs, templates, settings) that are hard to remember. bash-completion's README recommends its
+`completionsdir`, `/usr/share/bash-completion/completions` on Ubuntu, whose files it loads on the
+first Tab of their command, and calls the eagerly loaded `/etc/bash_completion.d` not
+recommended; it prefers the name `<command>.bash`, which noble's 2.11 and resolute's 2.16 both
+look up.
+
+Decision: The package installs `<command>.bash` for each `vpn-*` command into
+`/usr/share/bash-completion/completions` and recommends `bash-completion`. The completions read
+the names they offer from the commands themselves (`--json list`) or the package's Python
+modules (the schema, the configuration, the PKI's templates and reasons), not from copies, and
+send errors to `/dev/null`, so a user who may not read them gets the fixed words only.
+
+Consequences: Completions follow the code without being edited for each new setting or name. A
+Tab that offers names runs a command or Python, which takes a fraction of a second. The files
+are not conffiles; an administrator overrides one in `/etc/bash_completion.d` or the user's own
+completions directory.
+
+## ADR-39: /logs shows the last lines of listed units and files, capped per request
+
+Status: Accepted
+
+Context: The Router Manager should show the router's logs without SSH. The web service runs as
+root, so a path or a unit taken from a request could expose any file or journal on the router,
+and a log of gigabytes cannot be sent whole to a browser.
+
+Decision: `/logs` serves the journal of a fixed list of units, the package's own and the services
+it runs, or the whole journal, read with `journalctl`, and the files `web.log_files` lists,
+which `vpn-config-edit` sets; a unit or a path outside the lists is refused. A request answers
+at most 1000 lines, 200 by default, and a file is read from its last MiB only. The answer is
+read at each request; nothing is followed or kept.
+
+Consequences: Only administrators read logs, and only those listed. Showing a new file needs a
+configuration change, not code. Long histories stay with SSH and `journalctl`.
+
+## ADR-40: Static web sites are served by the router's Caddy and defined in their own PostgreSQL database
+
+Status: Accepted
+
+Context: The router should host static web sites, each on its own port, with its own TLS and host
+names told apart by SNI. Caddy already runs as the router's HTTPS proxy, configured by setup from a
+template, and serves several hosts on one port by SNI. The configuration file holds the router's
+settings; sites are many rows that change often and are edited by people who are not the router's
+administrators. A separate role per database keeps a feature's data apart from the refresh tokens
+and metrics.
+
+Decision: A site is a row of the `sites` table in the database `vpn-router-sites`, created by the
+web service like `vpn-router` with its own role and password file, and changed through
+`vpnrouter_sites` only, by `/sites`, `vpn-router-site` and the Router Manager; the table and its
+procedures are in `/usr/share/vpn-router/sql/sites.sql`. `sites.enabled` and the upload limit stay
+in the configuration file. Setup reads the enabled sites at each run and adds a block per site to
+the Caddyfile, served from `/var/lib/vpn-router/sites/<name>`, with TLS none, Let's Encrypt, an
+issuing CA of `pki.issuing_cas` through Caddy's internal issuer, or a certificate and key kept
+with the site; it opens each site's port on the interfaces of its `listen`. Caddy runs while HTTPS
+is ready or a site is served. A site may not take a port of the router's own services or
+`wan.local_fqdn`; sites sharing a port need host names, the same `listen` and the same kind of
+TLS. A site's `editors` group may change its files besides the admins; renaming the group renames
+it in the sites, and a group a site has cannot be removed.
+
+Consequences: Sites need no change of the configuration file and are backed up as a database dump
+with their folders. A site of Let's Encrypt needs its names to resolve to the router and port 80
+open, which setup opens on the external interface. While the database cannot be read, setup leaves
+the Caddyfile as it is. A site's folder is kept when the site is removed, unless asked otherwise.
+
+## ADR-41: Site files are uploaded through the web service and WebDAV served by rclone
+
+Status: Accepted
+
+Context: Content must reach a site's folder. Caddy's WebDAV handler is a third-party module that
+neither Ubuntu's nor Caddy's packages include; a custom build would leave apt. S3 servers that use
+a plain folder are rclone 1.65 and later (`serve s3`; noble has 1.60) and versitygw, which has no
+package. Azurite keeps blobs in its own format, which Caddy cannot serve. rclone 1.60 in the
+archive serves WebDAV with an auth proxy program and combines folders into one tree. The web
+service and the Router Manager pass small JSON bodies only.
+
+Decision: The web service serves a site's files under `/sites/<name>/files/`: listing, download,
+upload of a raw body streamed to disk up to `sites.upload_max_mb`, extraction of a zip archive
+that refuses absolute paths, `..`, links and oversize content before writing, folders, renaming
+and removal, every path resolved inside the site's folder. While `sites.webdav` is true,
+`vpn-router-webdav.service` runs `rclone serve webdav` on `127.0.0.1:7446` behind Caddy at
+`https://<wan.local_fqdn>:<sites.webdav_port>`; its auth proxy, `webdav-auth`, binds as the user
+and gives an admin all sites and any other user the sites of its editors groups, one folder each.
+rclone and PowerDNS are installed on demand from the archive by `vpn-router-install@<feature>`,
+like Caddy.
+
+Consequences: Uploads and WebDAV use the directory's passwords, a TOTP code appended for an
+enrolled user. rclone writes a WebDAV upload to its cache first and to the folder a few seconds
+later. S3 and Azure Blob clients are not served.
+
+## ADR-42: The name server is PowerDNS with its PostgreSQL backend
+
+Status: Accepted
+
+Context: The router hosts authoritative domains as their primary, with optional secondary name
+servers, and a domain can give the sites their records without a registrar change per site. Ubuntu
+has BIND, Knot and PowerDNS; only PowerDNS's gpgsql backend reads records
+from PostgreSQL, so changes are rows, without zone files or reloads. systemd-resolved's stub holds
+127.0.0.53 and 127.0.0.54, and the remote access clients' resolver answered on the external
+addresses, the addresses an authoritative server needs. The clients reach the internal address
+just as well, through the tunnel when it is in `local.cidrs` (ADR-43).
+
+Decision: While `dns.enabled` is true, setup runs `pdns.service` with
+`/etc/powerdns/pdns.d/vpn-router.conf`, written before the packages are installed, on the
+addresses of `dns.listen`, with the gpgsql backend on the database `vpn-router-dns` and PowerDNS's
+own schema, and `primary=yes`. The domains, their secondaries and manual records are rows of the
+router's tables in that database, like the sites in `vpn-router-sites`, not settings of
+`vpn-router.json`: they are many and change through the web service. `dns.nameserver` and
+`dns.addresses` stay settings, the router's one identity as the primary NS of every domain. Setup
+writes each domain as a MASTER zone through the procedure `dns_apply` of
+`/usr/share/vpn-router/sql/dns.sql`: SOA, NS of the router and the secondaries, A and AAAA records
+of `dns.addresses` for the apex, the name server and, with the domain's site records switch, every
+site host name whose closest domain it is, and the manual records; the serial grows only when the
+records change, which makes PowerDNS notify. A secondary is a name, its NS, and an address, which
+goes to the domain's `ALSO-NOTIFY` and `ALLOW-AXFR-FROM` metadata, so the global
+`allow-axfr-ips` stays the loopback default. A host name belongs to its closest domain only, and a
+domain inside another is delegated from it with NS records, so a name is never answered by two
+zones. The remote access clients' resolver answers on the addresses of the setting
+`p2s.dns_listen`, by default the internal one; a `dns.listen` that shares an interface with it is
+refused while P2S or OpenVPN is enabled.
+
+Consequences: The domains follow the sites at each setup run. Transfers are authorized by address,
+without TSIG, and there is no DNSSEC; the delegation of each domain is made at its parent zone by
+hand.
+
+## ADR-43: The remote access clients' resolver is dnsmasq, not systemd-resolved
+
+Status: Accepted
+
+Context: IKEv2 and OpenVPN clients were given the router as their DNS server, answered by
+systemd-resolved through a `DNSStubListenerExtra` drop-in. resolved synthesizes records for the
+machine's own host name, all its addresses, the Docker bridge and the tunnel addresses included,
+and for `_gateway` and `localhost`, on every stub, and systemd 255 has no setting that turns this
+off. Its extra stub also took port 53 of the addresses PowerDNS needs. dnsmasq-base is in main,
+a single binary without a service of its own, and forwards to one upstream server.
+
+Decision: `vpn-router-resolver.service` runs dnsmasq, bound to the addresses of `p2s.dns_listen`
+only (`bind-interfaces`), forwarding to resolved's stub on 127.0.0.53, without `/etc/hosts` and
+without forwarding names that have no dot (`domain-needed`). resolved keeps its loopback stubs
+only and stays the router's own resolver, with the upstream servers of the platform. Setup writes
+`/etc/vpn-router/dnsmasq.conf` while IKEv2, OpenVPN or WireGuard runs, opens port 53 there for
+their client networks, and removes the earlier drop-in.
+
+Consequences: Clients resolve the names resolved resolves, Azure's internal names included, but
+not the router's synthesized ones. The package depends on dnsmasq-base. PowerDNS and the clients'
+resolver share no address.
+
+## ADR-44: Apple VPN profiles are unsigned IKEv2 profiles with a PKCS#12 encrypted by a password given per download
+
+Status: Accepted
+
+Context: macOS, iOS and iPadOS connect to the IKEv2 access with their built-in IKEv2 client,
+configured by a configuration profile. The router keeps each user's certificate and key. Apple's
+clients read a PKCS#12 only when it is encrypted with 3DES and SHA-1, send one proposal per SA,
+and show an unsigned profile as unverified.
+
+Decision: The web service builds the profile with `plistlib` and python3-cryptography: the P2S CA
+and the root, the user's PKCS#12 encrypted with a password the caller gives with each request,
+and an IKEv2 payload matching `road-warrior.conf` (EAP-TLS with the certificate, AES-256,
+SHA2-256, group 14). The profile is not signed. Admins get any user's profile through `/users`,
+users their own through `/account` with their current password and code.
+
+Consequences: The password is never stored; the device asks for it when the profile is installed.
+A profile shows as unverified. A changed proposal of `road-warrior.conf` must be changed in the
+profile too. WireGuard is not part of it.
+
+## ADR-45: IKEv2 clients get split DNS domains, p2s.dns_domains
+
+Status: Accepted
+
+Context: The IKEv2 access is a split tunnel. macOS and iOS use the DNS server an IKEv2 VPN
+pushes only for queries scoped to the tunnel, so names only the router resolves, such as Azure's
+internal names, fail. RFC 8598 defines INTERNAL_DNS_DOMAIN (attribute 25): the client resolves the
+listed domains and their subdomains with the VPN's servers. strongSwan's pools take numeric
+attributes with string values; Apple profiles name such domains in `SupplementalMatchDomains`.
+
+Decision: The setting `p2s.dns_domains` lists the domains; setup pushes each as attribute 25 of the
+IKEv2 address pool, and the Apple VPN profile gives them as match domains of the router's resolver,
+the addresses setup records for the web service.
+
+Consequences: Clients resolve the listed domains through the tunnel and everything else with their
+own resolvers. Clients that ignore attribute 25 keep the scoped behaviour; the Apple profile
+covers Apple devices. A changed list reaches an Apple device with a newly installed profile.
+
+## ADR-46: vre opens files in the Shell page's editor over a socket checked by the peer's uid
+
+Status: Accepted
+
+Context: Administrators edit the router's files from the Router Manager's Shell page, in an editor
+of the page rather than a terminal editor. The command that names a file runs in the shell, as the
+console account. The web service runs as root, sandboxed with `ProtectHome=yes`, so it cannot see
+the accounts' home folders. Reading and writing as root would also bypass the account's
+permissions.
+
+Decision: Each shell has a random session in `VPN_ROUTER_SHELL`. `vpn-router-editor` (`vre`) sends
+the session and an absolute path to the web service on `/run/vpn-router/editor.sock`, which anyone
+may connect to. The web service accepts a request only when the peer's uid (`SO_PEERCRED`) is the
+uid of the session's console account. It then tells the shell's client over the shell's WebSocket,
+and the page reads and saves the file through `/shell/editor/<session>/<id>`. Files are read and
+written by `editor-file`, run with `systemd-run --uid=<account> --pipe` outside the sandbox, as the
+shell is. A save carries the SHA-256 of the content it replaces and is refused when the file
+changed since. Files open only while their shell lives.
+
+Consequences: The editor edits only what the console account may; a file only root may write is
+edited in the terminal. `vre` run under sudo is refused, as its uid is not the console account's.
+Each read and save starts a transient unit. Files are limited to 1 MiB of UTF-8 text.
+
+## ADR-47: The web service is the package vpnrouter_web, with one module per family of paths
+
+Status: Accepted
+
+Context: The web service answers about twenty families of paths: the status, the sign-in, the
+identities, the connections, backups, the PKI, logs, web sites, DNS, metrics and the shell with
+its editor. Kept in one script, the code of unrelated paths is read and changed together.
+
+Decision: `/usr/lib/vpn-router/web` only initializes and serves. The package
+`/usr/lib/vpn-router/vpnrouter_web/` holds the rest, laid out next to `vpnrouter_platforms/`:
+
+- `handler`: the `Handler` class, which reads a request, checks its token and routes it.
+- One module per family of paths (`status`, `auth`, `identities`, `connectivity`, `backup`, `pki`,
+  `logs`, `sites`, `dns`, `metrics`, `shell`), each with its constants and state.
+- `common`: what several of them need.
+
+A module imports from `common` and from no other route module, except `auth`, which takes the
+paths of a site's files from `sites`. `handler` imports them all, so the imports have no cycle. A
+function that needs the request takes the `Handler` as its first parameter instead of being a
+method.
+
+Consequences: A change to one family of paths touches one module and the routing in `handler`.
+State shared between requests, such as the open shells, lives in the module that owns it; other
+modules change it and never rebind it.

README.md

@@ -3,17 +3,19 @@
 A Debian package that configures a Linux host or virtual machine as a VPN router:
 
 - site-to-site IKEv2 IPSec with pre-shared key or certificate authentication (strongSwan swanctl)
-- road-warrior (P2S) access using IKEv2 EAP-TLS
+- IKEv2 access using EAP-TLS
 - a two-level certificate authority: a root, which may be kept offline, and issuing CAs for the VPN
   clients, for site-to-site and for general use, with certificate templates, published certificates
   and CRLs, and an optional ACME server
-- OpenVPN (P2S) access with a certificate and a password per user, the users kept in a local
+- OpenVPN access with a certificate and a password per user, the users kept in a local
   LDAP directory and managed with `vpn-router-user` or the web service
 - optional WireGuard endpoint
 - routing and NAT for a protected subnet, TCP MSS clamping, and UFW firewall rules
 - firewall rules for the ports Docker publishes, when Docker is installed
 - metrics of the router kept in PostgreSQL, served for an OpenTelemetry Collector and pushed
   over OTLP
+- static web sites served by Caddy, uploaded through the web service or WebDAV, and an optional
+  primary name server (PowerDNS) of the router's domains, with secondaries and records for the sites
 
 Nothing in the package is specific to a cloud provider. It is built on the external and
 internal NIC names, and a `mode` setting says how much of the rest you are supplying and
@@ -106,15 +108,17 @@ must have the type shown below; an unknown section or setting is an error.
 | `general` | `mode` | string | `manual` | How much you supply: `manual`, `interfaces` or `auto` |
 | `interfaces` | `external` | string | | Name of the NIC facing the untrusted network |
 | `interfaces` | `internal` | string | | Name of the NIC facing the protected network |
-| `wan` | `local_fqdn` | string | | This router's name or IP address: its IKE identity in `fqdn` mode, the name resolved in `public_ip` mode, and the name of HTTPS, road-warrior and OpenVPN |
-| `local` | `cidrs` | list | | Local subnets routed via the internal side, masqueraded to the external one, and offered to road-warrior and OpenVPN clients |
+| `wan` | `local_fqdn` | string | | This router's name or IP address: its IKE identity in `fqdn` mode, the name resolved in `public_ip` mode, and the name of HTTPS, IKEv2 and OpenVPN |
+| `local` | `cidrs` | list | | Local subnets routed via the internal side, masqueraded to the external one, and offered to IKEv2 and OpenVPN clients |
 | `local` | `int_addr` | string | | This host's address on the internal network |
 | `local` | `int_gateway_ip` | string | | Next hop on the internal side |
 | `site_to_site` | | object | | The site-to-site connections, each a name and an object of the settings below |
-| `p2s` | `enabled` | boolean | `false` | Road-warrior access |
-| `p2s` | `address_pool` | string | | CIDR assigned to road-warrior clients |
+| `p2s` | `enabled` | boolean | `false` | IKEv2 access |
+| `p2s` | `address_pool` | string | | CIDR assigned to IKEv2 clients |
+| `p2s` | `dns_domains` | list | | The domains IKEv2 clients resolve with the router's resolver (INTERNAL_DNS_DOMAIN, RFC 8598, and the match domains of the Apple VPN profile), at most 16 |
+| `p2s` | `dns_listen` | string | `internal` | The addresses of the resolver the IKEv2, OpenVPN and WireGuard clients are given: `internal`, `external` or `both` |
 | `wireguard` | `enabled` | boolean | `false` | WireGuard endpoint |
-| `wireguard` | `address` | string | | Address and prefix for `wg0`, for example `192.168.200.1/24` |
+| `wireguard` | `address` | string | | The router's own address on `wg0` with the prefix of the peers' network, for example `192.168.200.1/24`; the network and the broadcast address of a network larger than /31 are refused |
 | `wireguard` | `listen_port` | integer | `51820` | UDP port |
 | `openvpn` | `enabled` | boolean | `false` | OpenVPN access for users |
 | `openvpn` | `address_pool` | string | | IPv4 CIDR assigned to OpenVPN clients |
@@ -130,12 +134,24 @@ must have the type shown below; an unknown section or setting is an error.
 | `web` | `status_content` | string | `basic` | What `/` and `/status` show: `basic`, `standard` or `full` (see Status web service) |
 | `web` | `shell` | boolean | `false` | `/shell` opens a login shell for a member of `admins` with console login (see The shell) |
 | `web` | `shell_idle_minutes` | integer | `15` | Minutes without a keystroke after which a shell is closed, 1 to 1440 |
+| `web` | `log_files` | list | | Absolute paths of the log files `/logs` shows, at most 32 (see The /logs API) |
+| `web` | `shell_auth_timeout` | integer | `15` | Minutes after the last use of a shell in which a new shell opens without signing in again, 0 (always sign in) to 1440 |
 | `ssh` | `ldap_login` | boolean | `false` | sshd accepts the directory password of the console accounts in the directory (see Console login and SSH) |
 | `https` | `enabled` | boolean | `true` | Caddy serves the status web service and the Router Manager over HTTPS for `wan.local_fqdn` |
 | `https` | `email` | string | | The e-mail address of the Let's Encrypt account |
 | `https` | `web_port` | integer | `7444` | HTTPS port of the status web service |
 | `https` | `manager_port` | integer | `7443` | HTTPS port of the Router Manager |
 | `https` | `caddy_source` | string | `ubuntu` | Where Caddy is installed from: `ubuntu`, the Ubuntu archive, or `upstream`, Caddy's own repository (see HTTPS) |
+| `oidc` | `enabled` | boolean | `false` | The OpenID Provider at the status web service's HTTPS site, which needs `web.enabled`, `https.enabled` and `wan.local_fqdn` (see OpenID Provider) |
+| `sites` | `enabled` | boolean | `false` | Caddy serves the web sites (see Web sites) |
+| `sites` | `upload_max_mb` | integer | `512` | The largest upload of a site's file or zip archive, in MiB, 1 to 10240 |
+| `sites` | `webdav` | boolean | `false` | WebDAV of the sites' folders, which needs `https.enabled` and `wan.local_fqdn` (see WebDAV) |
+| `sites` | `webdav_port` | integer | `7445` | HTTPS port of WebDAV |
+| `dns` | `enabled` | boolean | `false` | The primary name server of the router's domains, which needs `dns.nameserver` and `dns.addresses` (see Name server) |
+| `dns` | `nameserver` | string | | The name server's host name, the primary NS of every domain |
+| `dns` | `addresses` | list | | The public addresses of the name server, the domains' apexes and the sites' host names |
+| `dns` | `listen` | string | `external` | The interfaces the name server answers on: `internal`, `external` or `both` |
+| `dns` | `ttl` | integer | `300` | TTL of the records, 60 to 86400 seconds |
 | `pki` | `root_name` | string | `VPN Router Root CA` | Common name of the root CA, when the router creates it |
 | `pki` | `root_days` | integer | `7300` | Days the root CA's certificate is valid |
 | `pki` | `ca_days` | integer | `3650` | Days an issuing CA's certificate is valid |
@@ -235,11 +251,19 @@ A minimal site-to-site configuration in `auto` mode:
 The router's IKE identity (`wan.local_fqdn` in `fqdn` mode) and the remote one (`id`) are
 an FQDN or an IPv4 or IPv6 address. They are written to the strongSwan configuration as given;
 strongSwan reads an address as an IP identity and a name as an FQDN, so a leading `@` is not needed
-and is refused. Road-warrior and OpenVPN access need a name in `wan.local_fqdn`.
+and is refused. IKEv2 and OpenVPN access need a name in `wan.local_fqdn`.
 
-WireGuard peers are added by hand in `/etc/wireguard/wg0.conf`. The package owns the
-`[Interface]` section of that file and rewrites it when the settings above change, but it
-carries every `[Peer]` section across untouched.
+WireGuard peers are VPN users' devices: a VPN user of the router's directory may have up to 16
+peers, each with its public key and its IPs, IPv4 addresses or networks, kept in the user's
+entry (`vpnRouterWireGuardPeer`) and set with `PUT /users/<name>` (`wireguard_peers`) or on the
+WireGuard tab of the Router Manager's Remote access management. A key is used by one peer only,
+the IPs of two peers may not overlap, and no peer's IPs cover the router's own address of
+`wireguard.address`. The package owns the `[Interface]` section of `/etc/wireguard/wg0.conf` and,
+between the lines `# BEGIN` and `# END WireGuard peers of the users of the router's directory`, a
+`[Peer]` section for each peer of a user who is not disabled; setup rewrites them when the
+settings or the peers change, and a change of a user's peers, disabling, enabling or removing a
+user with peers restarts setup. Every other `[Peer]` section, added by hand, is carried across
+untouched. While the directory cannot be reached, the users' peers in the file stay as they are.
 
 Every feature is independent. Leaving a group empty simply means that feature is not
 configured, and its generated files are removed.
@@ -333,6 +357,7 @@ vpn-config-edit set web.port 7082
 vpn-config-edit set web.trusted_proxies 127.0.0.1,10.0.0.4
 vpn-config-edit set site_to_site.branch.addrs branch.example.net
 vpn-config-edit remove site_to_site.branch
+vpn-config-edit set --restart oidc.enabled true
 ```
 
 `show` prints the file as indented JSON and does not change it. `set` takes a setting as
@@ -341,10 +366,29 @@ creates with the defaults when it does not exist, and converts the value to the
 a whole number, `true` or `false`, a list separated by commas (an empty value is an empty list),
 or a string; an unknown setting is refused. `remove site_to_site.NAME` removes a connection. It
 checks the whole configuration as `vpn-router-setup` does, and only then writes the file,
-indented, with mode 0600, and reminds that `vpn-router-setup` applies it. The status web service
+indented, with mode 0600, and reminds that `vpn-router-setup` applies it; with `--restart`, `set`
+and `remove` restart `vpn-router-setup` and wait until it has applied the change, and exit with
+status 1 when it fails. The status web service
 writes the file the same way, and a lock keeps the two from overwriting each other's change. A
 refused request exits with status 2, any other failure with 1.
 
+## Bash completion
+
+Bash completes the commands, options and arguments of `vpn-router-user`, `vpn-router-group`,
+`vpn-router-token`, `vpn-config-edit`, `vpn-router-backup`, `vpn-router-ca`, `vpn-router-caddy`
+and `vpn-router-site` with the Tab key. The package installs a file per command in
+`/usr/share/bash-completion/completions`, which the `bash-completion` package, recommended by
+`vpn-router`, loads on the first Tab after the command. For root, who can read them, the
+completions also offer the users and groups of the directory, the settings and site-to-site
+connections of `vpn-router.json` with `true` and `false` for a boolean setting, the issuing CAs and
+certificate templates, and the web sites; for other users only the fixed words.
+
+```sh
+sudo -i
+vpn-config-edit set oidc.<Tab>
+vpn-router-user passwd <Tab>
+```
+
 ## Applying changes
 
 ```sh
@@ -354,11 +398,11 @@ systemctl restart vpn-router-setup
 The service also runs at boot. With platform `none` it does nothing and says so.
 Otherwise it regenerates the configuration files, resolves the interfaces and their
 addresses as `mode` directs, applies routes, generates WireGuard keys and injects
-firewall rules. It provisions the user directory in `slapd` while OpenVPN or road-warrior
+firewall rules. It provisions the user directory in `slapd` while OpenVPN or IKEv2
 access is configured. It then starts `strongswan`, `wg-quick@wg0` and
 `openvpn-server@vpn-router` if the corresponding feature is configured, reloading or
 restarting them only when their inputs changed, and
-restarts `systemd-resolved` only when the road-warrior DNS drop-in changed. Turning a
+restarts the remote access clients' resolver only when its configuration changed. Turning a
 feature off in the configuration stops its service and removes its files. Every step is
 idempotent, so restarting with no changes does nothing.
 
@@ -405,7 +449,7 @@ The root signs the issuing CAs only (path length 1), and the issuing CAs sign th
 (path length 0):
 
 - `p2s`, named `pki.p2s_name`, signs the router's VPN server certificate, which IKEv2 and OpenVPN
-  present, and the users' certificates. Road-warrior and OpenVPN accept client certificates of
+  present, and the users' certificates. IKEv2 and OpenVPN accept client certificates of
   this CA only.
 - `s2s`, named `pki.s2s_name`, signs the router's site-to-site certificate and the certificates
   of its peers.
@@ -591,8 +635,8 @@ certificate and key from `/etc/caddy/vpn-router-pki/<name>/`, readable by its gr
 With `openvpn.enabled`, an `address_pool` and `wan.local_fqdn` set, `vpn-router-setup` runs
 `openvpn-server@vpn-router` with `/etc/openvpn/server/vpn-router.conf`. The server uses the
 router's VPN server certificate, the root and the P2S CA and their CRLs (see Certificates),
-pushes routes to `local.cidrs` and the router as DNS server, and opens `openvpn.port` on the
-external interface.
+pushes routes to `local.cidrs` and the router's addresses of `p2s.dns_listen` as DNS servers, and
+opens `openvpn.port` on the external interface.
 
 A client needs both a certificate of the P2S CA and the password of the user the
 certificate names:
@@ -608,7 +652,7 @@ certificate names:
 ### The user directory
 
 Once a platform is chosen, `vpn-router-setup` keeps a directory of users in the local slapd,
-whether or not OpenVPN or road-warrior access is enabled, so users can be managed before either
+whether or not OpenVPN or IKEv2 access is enabled, so users can be managed before either
 is switched on:
 
 - its own database, `dc=vpn-router,dc=local` in `/var/lib/ldap/vpn-router`, next to the one the
@@ -618,10 +662,12 @@ is switched on:
   `account` for a Manager-only account (see Managing users);
 - the package's own schema, `cn=vpn-router,cn=schema,cn=config`, under the OID
   `2.25.98477352595735834532404256531620013001` of the UUID arc: the auxiliary class
-  `vpnRouterAccount` with `MAY ( mail $ vpnRouterScope $ displayName $ description )`, which
-  Manager-only and service accounts have, and the attribute `vpnRouterScope`, authorization
-  scopes, of which `service` marks a service account; `displayName` and `description` are the
-  display name and the description of a service account;
+  `vpnRouterAccount`, which Manager-only and service accounts have, and the attribute
+  `vpnRouterScope`, authorization scopes, of which `service` marks a service account;
+  `displayName` and `description` are the display name and the description of a service
+  account, and `vpnRouterRedirectUri`, `vpnRouterPostLogoutRedirectUri` and
+  `vpnRouterAllowedGroup` the settings of a service account that is a client of the OpenID
+  Provider;
 - `ou=groups` holds one `groupOfNames` per group, named by `cn`, with its members' DNs in
   `member` and an optional `description`;
 - `cn=user-manager,ou=services` is the account that changes users and groups; it may write
@@ -656,7 +702,8 @@ it is added:
 - a service account, a Manager-only account whose `vpnRouterScope` is `service`, which another
   system signs in with to use a router service, such as an OpenTelemetry Collector reading
   `/metrics`; it cannot sign in to `/auth`. Besides its name, it has a display name and a
-  description. `add --service` adds one, and the web service manages them at `/service-accounts`,
+  description, and a service account with redirect URIs is a client of the OpenID Provider (see
+  OpenID Provider). `add --service` adds one, and the web service manages them at `/service-accounts`,
   not at `/users`. Internal service accounts are those the router creates and manages for its own
   services, display name and description included; at present that is the metrics service's, the
   account `metrics.service_account` names while metrics are enabled (see Metrics), which
@@ -691,12 +738,12 @@ vpn-router-user otp-remove alice
 
 | Command | Effect |
 | --- | --- |
-| `list` | The users with their kind, names and e-mail addresses, whether each is enabled or locked, has a certificate and is enrolled for TOTP |
+| `list` | The users with their kind, names and e-mail addresses, whether each is enabled or locked, has a certificate and is enrolled for TOTP, the number of passkeys and the console login |
 | `add <name> --first-name F --last-name L --email E` | Adds a VPN user and issues the certificate |
 | `add <name> [--email E]` | Adds a Manager-only account, with the e-mail address when given; one name without the other two options is refused |
-| `add <name> --service [--display-name N] [--description D] [--email E]` | Adds a service account, with its display name, description and e-mail address when given; the names are refused |
+| `add <name> --service [--display-name N] [--description D] [--email E] [--redirect-uri U ...] [--post-logout-redirect-uri U ...] [--allowed-group G ...]` | Adds a service account, with its display name, description, e-mail address and OpenID Provider client settings when given; the names are refused |
 | `update <name> [--first-name F] [--last-name L] [--email E]` | Changes the names or the e-mail address |
-| `update <name> [--display-name N] [--description D] [--email E]` | Changes the display name, the description or the e-mail address of a service account; `''` removes one |
+| `update <name> [--display-name N] [--description D] [--email E] [--redirect-uri U ...] [--post-logout-redirect-uri U ...] [--allowed-group G ...]` | Changes the display name, the description, the e-mail address or the OpenID Provider client settings of a service account; `''` removes one; a repeated client option gives all values of its kind |
 | `passwd <name>` | Sets the password |
 | `disable <name>`, `enable <name>` | Locks the user out of OpenVPN and `/auth`, and lets the user in again |
 | `unlock <name>` | Ends a lockout after failed logins and clears the failure count; a disabled user stays disabled |
@@ -704,17 +751,20 @@ vpn-router-user otp-remove alice
 | `profile <name>` | The OpenVPN client profile, with the CA, the certificate and the key inline |
 | `otp-new <name>` | A new TOTP secret and its `otpauth://` URI, issued by `wan.local_fqdn`, for an authenticator app; nothing is stored |
 | `otp-enrol <name> <code>` | Stores the secret read from standard input when the code is a current code of it, replacing a secret the user has |
-| `otp-remove <name>` | Removes the user's TOTP secret |
-| `console <name> (--posix \| --account LOCAL \| --off)` | Switches the console login of a member of `admins` on, as the user's own POSIX account or a local account, or off (see Console login and SSH) |
+| `otp-remove <name>` | Removes the user's TOTP secret and ends the sessions of the user's own POSIX account |
+| `console <name> (--posix \| --account LOCAL \| --off)` | Switches the console login of a member of `admins` enrolled for TOTP on, as the user's own POSIX account or a local account, or off (see Console login and SSH) |
+| `passkeys-remove <name>` | Removes all the user's passkeys (see Passkeys) |
 
-A user name is 1 to 32 lowercase letters, digits and hyphens, starting with a letter; a
+A user name is 1 to 32 lowercase letters, digits and hyphens, starting with a letter, and a
+service account may instead be named by a GUID in lowercase, such as
+`3f2b8c1e-9a4d-4e6f-8b2a-1c5d7e9f0a3b`; a
 password has 8 to 128 characters; a first or last name has 1 to 64 printable characters; an
 e-mail address has one `@`, no spaces and a dot in its domain; a TOTP secret is 32 base32
 characters, as `otp-new` makes it, and a code 6 digits. Once enrolled, a user logs in to OpenVPN
 and `/auth` with the password followed by a current code. In the answers `manager_only`, `service`
 and `internal` tell the kind, and a Manager-only account has its names as `null`; `update` changes only its e-mail
 address, and `--email ''` removes it. Changing a user's password, disabling, unlocking or removing the user also revokes its
-refresh tokens of `/auth`. The exit status is 0 on success, 2 for an invalid request, 3 when the
+refresh tokens of `/auth` and its codes, tokens and sessions of the OpenID Provider. The exit status is 0 on success, 2 for an invalid request, 3 when the
 user does not exist, 4 when the user exists and 1 for any other failure.
 
 When the Router Manager is installed with an administrator (its debconf questions
@@ -723,14 +773,37 @@ When the Router Manager is installed with an administrator (its debconf question
 Manager-only account, adds it to the group `admins`, which it creates when missing, and removes
 the file.
 
-The certificate is also accepted by road-warrior (IKEv2 EAP-TLS) access, which checks
+The certificate is also accepted by IKEv2 (EAP-TLS) access, which checks
 certificates only, so `disable` does not affect it; `remove` revokes the certificate for both.
 
+### Apple VPN profile
+
+While `p2s.enabled` is `true` and `wan.local_fqdn` is set, `/users/<name>/apple-profile` and a
+user's own `/account/apple-profile` give an unsigned Apple configuration profile (`.mobileconfig`)
+that sets up IKEv2 access in the built-in VPN client of macOS, iOS and iPadOS. It holds:
+
+- the P2S CA and the root CA, the root installed as a trusted root;
+- the user's certificate and key as a PKCS#12 encrypted with the password of the request, with
+  3DES and SHA-1, the only encryption Apple's clients read; the device asks for the password when
+  the profile is installed, and the router does not keep it;
+- an IKEv2 VPN to `wan.local_fqdn`, with the user name as the local identity, the certificate over
+  EAP-TLS, and AES-256, SHA2-256 and group 14 for IKE and ESP, as the router's IKEv2
+  connection (`road-warrior`) takes them;
+- with `p2s.dns_domains`, the router's resolver for those domains and their subdomains
+  (`SupplementalMatchDomains`). macOS and iOS use the DNS server of a VPN that does not carry all
+  traffic only for its match domains.
+
+The password is 8 to 128 characters. A user asking for the own profile also gives the current
+password and, when enrolled, a code.
+
 ### Console login and SSH
 
-A member of `admins` may have console login: the Router Manager's Shell page (see The shell),
-and, for the user's own POSIX account, SSH and sudo. Only root on the router switches it, with
-`vpn-router-user console` or a token of `vpn-router-token`, as for the group `admins`:
+A member of `admins` enrolled for TOTP may have console login: the Router Manager's Shell page
+(see The shell), and, for the user's own POSIX account, SSH and sudo. Only root on the router
+switches it, with `vpn-router-user console` or a token of `vpn-router-token`, as for the group
+`admins`. Switching it on is refused without the enrolment, and a user whose enrolment is removed
+is refused the shell, SSH and sudo until enrolling again; the user's open shells end within a
+minute, and removing the enrolment ends the sessions of the user's own POSIX account:
 
 ```sh
 vpn-router-user console alice --posix
@@ -742,9 +815,8 @@ vpn-config-edit set ssh.ldap_login true
 - **Own POSIX account** (`--posix`): the user's entry becomes a `posixAccount` of the directory
   with the user's name, a uid from 20000 up, the local group `vpn-router-console` as its group,
   `/home/<name>` and `/bin/bash`. `nslcd` makes it known to the system over slapd's local socket
-  and checks its password by binding as the user, so a user enrolled for TOTP types the password
-  followed by a current code, failed logins count towards the lockout, and a disabled user cannot
-  sign in. The home is created at the first login and kept when the user is removed. Members of
+  and checks its password by binding as the user, so the user types the password followed by a
+  current code, failed logins count towards the lockout, and a disabled user cannot sign in. The home is created at the first login and kept when the user is removed. Members of
   `vpn-router-console` may run any command with sudo, with the same password. A local account of
   the same name is refused.
 - **Local account** (`--account`): the console runs as an existing local account with a uid from
@@ -758,12 +830,34 @@ While `ssh.ldap_login` is `true`, setup lets sshd accept the password of the mem
 settings. A password change is made in the Router Manager or with `vpn-router-user passwd`, not
 with `passwd`.
 
+### Passkeys
+
+A user who is not a service account may sign in to the Router Manager and to the OpenID Provider
+with a passkey instead of the password and code. Passkeys are for those sign-ins only: OpenVPN,
+the shell, SSH and sudo keep the password and code. A passkey belongs to `wan.local_fqdn`, so the
+browser offers it on the HTTPS addresses on that name, and passkeys need the name set; a passkey made
+before the name changes is no longer offered. The authenticator checks the user (a PIN or a
+fingerprint), and the passkey is kept by it or by the user's password manager.
+
+A user adds a passkey on the Router Manager's Account page with the current password and code,
+and removes it there. Each passkey is a value of `vpnRouterPasskey` on the user's entry, with its
+public key, label and the time it was added; a user has at most 10. An administrator removes all
+passkeys of a user on the Users page, through `/users`, or with:
+
+```sh
+vpn-router-user passkeys-remove alice
+```
+
+A disabled or locked user is refused a passkey sign-in too.
+
 ### Managing groups
 
 `vpn-router-group` manages the groups. A group has a name, with the rules of a user name, an
 optional description of at most 256 printable characters, and at least one member, each a user
-of the directory. Groups record membership only; nothing on the router reads them. The output,
-`--json`, `-h` and `--help` work as for `vpn-router-user`.
+of the directory. The group `admins` grants the management of the router, and the allowed groups
+of a client of the OpenID Provider admit their members to it; other groups record membership
+only. Renaming a group renames it in the clients that allow it, and a group a client allows
+cannot be removed. The output, `--json`, `-h` and `--help` work as for `vpn-router-user`.
 
 ```sh
 vpn-router-group add ops --member alice --member bob --description 'Operations team'
@@ -780,7 +874,7 @@ vpn-router-group remove netops
 | `list` | The groups with their members and descriptions |
 | `add <name> --member U [--member U ...] [--description D]` | Adds the group with its members |
 | `update <name> [--name N] [--description D]` | Renames the group or sets its description; `''` removes it |
-| `remove <name>` | Removes the group; its members are kept |
+| `remove <name>` | Removes the group; its members are kept; refused while a client of the OpenID Provider allows it |
 | `member-add <name> <user>` | Adds the user to the group |
 | `member-remove <name> <user>` | Takes the user out of the group; refused for the last member |
 
@@ -798,16 +892,23 @@ deploying.
 which is how a deferred install is expressed. `generic` is the module to choose when the
 router should be configured but the platform adds nothing.
 
-The shipped modules currently add nothing. Road-warrior clients are given the router
-itself as their DNS server and the router forwards through its own `systemd-resolved`, so
-no provider resolver has to be advertised or routed through the tunnel on any platform.
+The shipped modules currently add nothing. IKEv2, OpenVPN and WireGuard clients are given the
+router's addresses of `p2s.dns_listen` as their DNS servers, by default the internal address,
+the WireGuard clients in the configuration the Router Manager makes for a device (`DNS =`),
+where `vpn-router-resolver.service`, dnsmasq with `/etc/vpn-router/dnsmasq.conf`, answers and
+the firewall opens port 53 for the client pools and the WireGuard network, so no provider resolver has to be advertised or
+routed through the tunnel on any platform. dnsmasq forwards to `systemd-resolved` on
+127.0.0.53, which keeps only its loopback stubs, and forwards no name without a dot, so the
+router's own host name, `_gateway` and `localhost` are not answered to the clients. The clients reach
+the internal address when it is inside `local.cidrs`, which they route through the tunnel. Port 53
+of the other addresses stays free for the name server (see Name server).
 The modules exist as the documented place for platform specifics if that changes.
 
 A module may define any of the following, and takes the default for anything it omits:
 
 | Name | Type | Effect |
 |---|---|---|
-| `EXTRA_P2S_DNS` | `str` | added to the road-warrior pool `dns` list |
+| `EXTRA_P2S_DNS` | `str` | added to the `dns` list of the IKEv2 address pool |
 | `EXTRA_LOCAL_TS` | `str` | added to `local_ts` on both connections |
 | `apply(ctx)` | function | called once the system is configured, to apply platform-specific state; must be idempotent |
 
@@ -840,15 +941,24 @@ configuration: no key, identity, subnet, or address but the client's. They show
 |---|---|
 | `basic` (default) | The overall status (`ok` or `degraded`), the time and the Client IP |
 | `standard` | Also the `vpn-router` version, the `vpn-router-manager` version or that it is not installed, and the number of active services and of services in any other state, without their names |
-| `full` | Also each service and its state, Docker, how many site-to-site connections are set up and how many of them are established (`site_to_site`: `connections` and `established`, `null` when swanctl cannot be asked), road-warrior, OpenVPN and WireGuard |
+| `full` | Also each service and its state, Docker, how many site-to-site connections are set up and how many of them are established (`site_to_site`: `connections` and `established`, `null` when swanctl cannot be asked), IKEv2, OpenVPN and WireGuard |
 
 The Client IP is the address the request came from: the last entry of `X-Forwarded-For` for a
 request from one of `web.trusted_proxies`, by default the address the request came in on, so
 behind Caddy or a Router Manager on the router it is the browser's. `/status` names the content in
 `content` and the Client IP in `client_ip`; `/` keeps the time and the link to `/status`.
 
-The service first makes its signing key and the refresh tokens' database, retrying every 15
-seconds, for example while PostgreSQL is not running yet, and logs each failure; then it listens.
+The service first makes its signing key, the OpenID Provider's key and the refresh tokens'
+database, retrying every 15 seconds, for example while PostgreSQL is not running yet, and logs
+each failure; then it listens.
+
+The service is `/usr/lib/vpn-router/web`, which starts it, and the package
+`/usr/lib/vpn-router/vpnrouter_web/`, which answers the requests:
+
+- `handler`: reads each request, checks its token, and passes it to the module of its path.
+- `common`: what the modules share.
+- One module per family of paths: `status`, `auth`, `identities`, `connectivity`, `backup`,
+  `pki`, `logs`, `sites`, `dns`, `metrics` and `shell`.
 
 ### Bootstrap diagnostics
 
@@ -874,23 +984,27 @@ curl http://10.0.0.4:17081/
 | `/status` | The same status as JSON |
 | `/auth` | Signing in with a user's password and TOTP code, refreshing and signing out |
 | `/config` | The configuration without its secret options, and what the router resolved and runs, as JSON; needs a token |
-| `/users` | The users of OpenVPN and road-warrior access; needs a token |
+| `/users` | The users of OpenVPN and IKEv2 access; needs a token |
 | `/service-accounts` | The service accounts; needs a token |
 | `/groups` | The groups of users; needs a token |
 | `/site-to-site` | The site-to-site connections: list, add, change and remove; needs a token |
 | `/account` | The account of the signed-in user: its details, its password and its TOTP enrolment; needs a user's token |
+| `/logs` | The last lines of the journal of the router's units and of the files of `web.log_files`; needs a token |
+| `/sites` | The web sites and their files; needs a token |
+| `/dns` | The name server's settings and records; needs a token |
+| `/.well-known/openid-configuration`, `/oidc/...` | The OpenID Provider, on `127.0.0.1` only, where Caddy passes the requests (see OpenID Provider) |
 
 The status holds the state of `vpn-router-setup`, `slapd` and each PostgreSQL cluster unit
 (`postgresql@<version>-<cluster>`, or `postgresql` as `no cluster` without one), of
 `vpn-router-manager` when that package is installed, of `strongswan` when site-to-site or
-road-warrior access is configured, of `wg-quick@wg0` when WireGuard is, and of
+IKEv2 access is configured, of `wg-quick@wg0` when WireGuard is, and of
 `openvpn-server@vpn-router` when OpenVPN is; the number of connected
 OpenVPN clients, from the server's status file, which OpenVPN rewrites every 5 seconds; the package version and,
 as `manager_version`, the installed version of `vpn-router-manager` (`null`, shown as not installed, without it); whether
 Docker is installed, and when it is, the state of `docker.service` and of `vpn-router-docker`
 (the Docker rules), which do not change `status`; as `site_to_site`, the number of site-to-site
 connections that are set up (`connections`) and of those established (`established`, `null` when
-swanctl cannot be asked), without their names; the number of connected road-warrior (IPsec P2S) clients; and
+swanctl cannot be asked), without their names; the number of connected IKEv2 clients; and
 the WireGuard peers with the age of their last handshake and their traffic. `status` is `ok` when
 all these services are active, and `degraded` otherwise.
 
@@ -901,7 +1015,7 @@ curl http://10.0.0.4:7081/status
 
 ### Tokens and signing in
 
-`/config`, `/users`, `/service-accounts`, `/groups`, `/site-to-site`, `/backup`, `/remote-access`, `/ca`, `/shell` and `/account` need a JWT in an `Authorization: Bearer` header, signed with
+`/config`, `/metrics/history`, `/metrics/settings`, `/users`, `/service-accounts`, `/groups`, `/site-to-site`, `/backup`, `/remote-access`, `/ca`, `/logs`, `/sites`, `/dns`, `/shell` and `/account` need a JWT in an `Authorization: Bearer` header, signed with
 HS256 by the key the web service makes on its first run, `/etc/vpn-router/web.key` (root only).
 The key never leaves the router; while it does not exist these paths and `/auth` are not served
 (404). A missing, expired or wrongly signed token, or one of another algorithm, gets 401 with
@@ -928,7 +1042,9 @@ vpn-router-token --json --days 30
 
 | Request | Body | Answer |
 | --- | --- | --- |
-| `POST /auth` | `{"name", "password", "code"}`; `code` only for a user enrolled for TOTP | the tokens |
+| `POST /auth` | `{"name", "password", "code"}`; `code` only for a user enrolled for TOTP | the tokens and `"name"` |
+| `POST /auth/passkey` | `{}` | `{"id", "options"}`: a pending sign-in, valid 2 minutes, and the options of `navigator.credentials.get` in their JSON form |
+| `POST /auth/passkey/complete` | `{"id", "credential"}`, `credential` the browser's answer as its `toJSON()` gives it | the tokens and `"name"`, the user whose passkey signed |
 | `POST /auth/refresh` | `{"refresh_token"}` | new tokens; the refresh token given is used up |
 | `POST /auth/logout` | `{"refresh_token"}` | `{"revoked": true}`, or `false` for a token not known |
 
@@ -937,7 +1053,9 @@ The tokens are `{"access_token", "token_type": "Bearer", "expires_in": 300, "ref
 get 401 with the same message; a refresh token is refused once its user is disabled, locked or
 removed. Changing a user's password, disabling, unlocking or removing the user revokes the
 user's refresh tokens. Five failed logins lock the account for 15 minutes (see the user
-directory). `/auth` and `/auth/refresh` take at most 10 calls a minute from one client address,
+directory). A passkey that does not sign, is not the user's, or of a disabled, locked or service
+account gets 401 too (see Passkeys). `/auth`, `/auth/passkey/complete` and `/auth/refresh` take
+at most 10 calls a minute from one client address,
 and answer 429 with `Retry-After` beyond that; for a call from one of `web.trusted_proxies`, by
 default the address the call came in on, the client address is the last entry of
 `X-Forwarded-For`.
@@ -961,8 +1079,8 @@ every service and tunnel while the public status page shows less.
 
 ### The shell
 
-While `web.shell` is `true`, `/shell` gives a member of `admins` whose console login is on (see
-Console login and SSH) a login shell on the router, as the user's console account, for the
+While `web.shell` is `true`, `/shell` gives a member of `admins` whose console login is on and
+who is enrolled for TOTP (see Console login and SSH) a login shell on the router, as the user's console account, for the
 Router Manager's Shell page. It is off by default and switched on and off on the router only:
 
 ```sh
@@ -972,20 +1090,51 @@ vpn-config-edit set web.shell true
 
 | Request | Body | Answer |
 | --- | --- | --- |
-| `POST /shell` | `{"password", "code"}`; `code` only for a user enrolled for TOTP | `{"ticket", "expires_in": 30}` |
+| `POST /shell` | `{"password", "code"}`; `{}` within `web.shell_auth_timeout` | `{"ticket", "expires_in": 30}` |
 | `GET /shell?ticket=<ticket>` | a WebSocket handshake | the terminal |
 
 `POST /shell` needs an access token of `/auth`, not one of `vpn-router-token`, and signs its user
 in again: a wrong password or code gets 403 and counts as a failed login; it gets 403 too while
-`web.shell` is `false` or the user's console login is off. The ticket opens one
+`web.shell` is `false`, the user's console login is off or the user is not enrolled for TOTP. Without a password it gives a ticket
+while the user's last sign-in of `POST /shell` or keystroke in a shell is less than
+`web.shell_auth_timeout` minutes ago, and `{"ticket": null}` otherwise. The ticket opens one
 shell for the same user within 30 seconds. Over the WebSocket, binary messages of the client
 are keystrokes, a text message `{"cols", "rows"}` sets the window size, and binary messages of
 the router are the terminal's output. The shell is a PAM login session of the console account,
 run by `systemd-run` in a transient unit `vpn-router-shell-<id>`; sudo works as for SSH. It is closed after `web.shell_idle_minutes` without a keystroke, when the shell
-exits, or when the connection closes; the router then sends a close frame with the reason. The
+exits, when the connection closes, or within a minute of the user's console login being switched
+off or the TOTP enrolment removed; the router then sends a close frame with the reason. The
 journal of `vpn-router-web` records who opened each shell, from which address, in which unit,
 when it ended and why, and each refused ticket or shell with the reason.
 
+#### The editor of the shell
+
+In the shell, `vpn-router-editor FILE...`, or its short name `vre`, opens files in the editor of
+the Router Manager's Shell page and returns at once:
+
+```sh
+vre /etc/vpn-router/vpn-router.json ~/notes.txt
+```
+
+- **How the files reach the page:** each shell has its session in `VPN_ROUTER_SHELL`. `vre`
+  names each file, as an absolute path, with that session on the socket
+  `/run/vpn-router/editor.sock`. The web service accepts it only from a process that runs as the
+  shell's console account, and sends the page a text message `{"editor": "open", "session", "id", "path"}`
+  over the shell's WebSocket.
+- **Reading and saving:** the page uses the routes below, which need the user's access token. The
+  file is read and written as the console account by `/usr/lib/vpn-router/editor-file`, run with
+  `systemd-run --uid --pipe`, so the account's permissions apply. A save writes the file in place,
+  keeping its owner and mode, and creates a file that does not exist.
+- **Limits:** only regular files of UTF-8 text up to 1 MiB, and at most 20 open files per shell.
+- **Lifetime:** the files are open while the shell lives. `vre` outside the Router Manager's shell
+  exits with status 2.
+
+| Request | Body | Answer |
+| --- | --- | --- |
+| `GET /shell/editor/<session>/<id>` | | `{"path", "content", "version"}`, `version` the SHA-256 of the content |
+| `PUT /shell/editor/<session>/<id>` | `{"content", "version"}` | `{"path", "version"}`; 409 when the file no longer has `version` |
+| `DELETE /shell/editor/<session>/<id>` | | `{"path", "closed": true}` |
+
 ### The /config page
 
 `/config` shows what `/` and `/status` leave out, for a client such as manage-ui:
@@ -998,7 +1147,7 @@ when it ended and why, and each refused ticket or shell with the reason.
 | `wireguard` | The public key and port of `wg0`, and each peer's public key, endpoint, allowed IPs, handshake age and traffic; no private or preshared key |
 | `docker` | `docker.exposed_ports` and the rules of the `VPN-ROUTER-DOCKER` chain |
 | `postgresql` | `clusters`: each PostgreSQL cluster of `pg_lsclusters` with its version, name, port, status and data directory, and for one that is online its `settings`: `server_version`, `listen_addresses`, `port`, `max_connections`, `shared_buffers`, `effective_cache_size`, `work_mem`, `password_encryption`, `ssl` and `timezone`; `null` when `pg_lsclusters` fails |
-| `caddy` | The installed Caddy: `version`, and `source`, `upstream` once Caddy's repository is configured and `ubuntu` otherwise; `null` when Caddy is not installed |
+| `caddy` | The installed Caddy: `version`, `source`, `upstream` once Caddy's repository is configured and `ubuntu` otherwise, and `service`, the state of `caddy.service`; `null` when Caddy is not installed |
 
 ### The /postgresql page
 
@@ -1009,6 +1158,73 @@ router:
 - **A cluster that is not online:** `databases` and `size` are `null`.
 - **Collection:** the web service reads it with `psql` as the `postgres` user at each request.
 
+### The /logs API
+
+`/logs`, with the same token as `/config`, shows the last lines of the journal and of log files,
+read at each request:
+
+| Request | Answer |
+| --- | --- |
+| `GET /logs` | `{"units", "files", "max_lines"}`: the units whose journal it shows, the files of `web.log_files` and the most lines one request answers, 1000 |
+| `GET /logs/journal?unit=<unit>&lines=<n>` | `{"lines": [...]}`: the last lines of the unit's journal, or of the whole journal without `unit`, with ISO times |
+| `GET /logs/file?path=<path>&lines=<n>` | `{"lines": [...]}`: the last lines of a file `web.log_files` lists |
+
+The units are the package's own (`vpn-router-setup`, `-web`, `-metrics`, `-pki`, `-backup`,
+`-caddy`, `-resolver`, `-webdav`), `vpn-router-manager`, `caddy`, `slapd`, `nslcd`, `postgresql`,
+`strongswan`, `wg-quick@wg0`, `openvpn-server@vpn-router`, `ssh` and `pdns`. `lines` is 1 to 1000, 200 without it. A
+file is read from at most its last MiB, so very long lines give fewer lines. A unit or a file not
+in the lists is 404, as is a listed file that does not exist.
+
+```sh
+vpn-config-edit set web.log_files /var/log/syslog,/var/log/auth.log
+```
+
+### The /sites API
+
+`/sites`, with the same token as `/config`, manages the web sites, with the module
+`vpn-router-site` uses too, `/usr/lib/vpn-router/vpnrouter_sites.py`:
+
+| Request | Answer |
+| --- | --- |
+| `GET /sites` | `{"settings", "sites"}`: the `sites` section and the sites, each with its settings but `private_key`, with `private_key_set`, `modified` and `directory` |
+| `PUT /sites` | Changes any of the settings of the `sites` section |
+| `POST /sites` | Adds a site: `{"name", ...}` with any of its settings; an existing name is 409 |
+| `GET /sites/<name>` | The site |
+| `PUT /sites/<name>` | Changes any of its settings; an empty or absent `private_key` keeps the key |
+| `DELETE /sites/<name>?content=true` | Removes the site, with `content=true` also its folder |
+| `GET /sites/<name>/files/<path>` | A folder: `{"path", "entries": [{"name", "folder", "size", "modified"}]}`; a file: the file, as an attachment |
+| `PUT /sites/<name>/files/<path>` | Writes the body to the file, creating its folders; with `?unzip=true` the body is a zip archive extracted into the folder of the path: `{"path", "files"}` |
+| `POST /sites/<name>/files/<path>` | `{"folder": true}` creates the folder; `{"rename": "<path>"}` moves the file or folder |
+| `DELETE /sites/<name>/files/<path>` | Removes the file or folder |
+
+The paths of `/files/` are relative to the site's folder and may not leave it; a `PUT` needs a
+`Content-Length`. The files of a site may also be used by a member of its `editors` group. Invalid
+settings are 400, a missing site 404.
+
+```sh
+curl -X PUT -H "Authorization: Bearer $TOKEN" --data-binary @site.zip \
+    'https://router.example.com:7444/sites/www/files/?unzip=true'
+```
+
+### The /dns API
+
+`/dns`, with the same token as `/config`:
+
+| Request | Answer |
+| --- | --- |
+| `GET /dns` | `{"settings", "installed", "running", "domains", "problem"}`: the `dns` section, whether PowerDNS is installed and runs, the domains, each `{"name", "sites", "ttl", "secondaries", "manual", "records"}` with its secondaries `{"nameserver", "address"}`, its manual records and the records it serves, and why they cannot be read, `null` when they can |
+| `PUT /dns` | Changes any of the settings of the `dns` section |
+| `POST /dns/domains` | Adds a domain: `{"name", "sites"?, "ttl"?}`; an existing name is 409 |
+| `PUT /dns/domains/<domain>` | Changes `sites` or `ttl` of the domain |
+| `DELETE /dns/domains/<domain>` | Removes the domain with its secondaries and manual records |
+| `POST /dns/domains/<domain>/secondaries` | Adds a secondary name server, or changes its address: `{"nameserver", "address"}` |
+| `DELETE /dns/domains/<domain>/secondaries/<nameserver>` | Removes the secondary name server |
+| `POST /dns/domains/<domain>/records` | Adds a manual record: `{"name", "type", "content", "ttl"?}`; `name` is relative to the domain, `@` for the domain itself, or absolute with a final dot, and `ttl` is the domain's without it |
+| `DELETE /dns/domains/<domain>/records?name=&type=&content=` | Removes the manual records of the name and type, only the one of `content` when it is given |
+
+A TXT content without quotes is quoted; MX is `<preference> <host>`, SRV `<priority> <weight>
+<port> <host>` and CAA `<flags> <tag> "<value>"`. A CNAME must be its name's only record.
+
 ### The /users API
 
 `/users` manages users with the same token as `/config`, with the module `vpn-router-user` uses
@@ -1017,24 +1233,26 @@ and answer bodies are JSON; a request body is at most 65536 bytes.
 
 | Request | Body | Answer |
 | --- | --- | --- |
-| `GET /users` | | `{"users": [{"name", "manager_only", "service", "internal", "enabled", "locked", "certificate", "otp", "console", "first_name", "last_name", "email"}, ...]}`; `console` is `null` or `{"enabled", "account", "local", "uid"}` |
+| `GET /users` | | `{"users": [{"name", "manager_only", "service", "internal", "enabled", "locked", "certificate", "otp", "console", "wireguard_peers", "passkeys", "first_name", "last_name", "email"}, ...], "wireguard": {"enabled", "address"}}`; `console` is `null` or `{"enabled", "account", "local", "uid"}`, `wireguard_peers` a list of `{"public_key", "ips"}`, `passkeys` a list of `{"id", "label", "created"}`, and `wireguard` the endpoint's settings, whose network the peers' addresses come from |
 | `POST /users` | `{"name", "password", "first_name", "last_name", "email"}` for a VPN user; `{"name", "password", "email"?}` for a Manager-only account | 201 and the user |
-| `PUT /users/<name>` | any of `{"first_name", "last_name", "email"}`; for a Manager-only account only `{"email"}`, `""` removing it | the user |
+| `PUT /users/<name>` | any of `{"first_name", "last_name", "email", "wireguard_peers"}`; `wireguard_peers`, `[{"public_key", "ips"}]`, replaces a VPN user's WireGuard peers (see Configuration); for a Manager-only account only `{"email"}`, `""` removing it | the user |
 | `PUT /users/<name>/password` | `{"password": ...}` | the user |
 | `POST /users/<name>/disable` | | the user |
 | `POST /users/<name>/enable` | | the user |
 | `POST /users/<name>/unlock` | | the user |
 | `DELETE /users/<name>` | | `{"name", "removed": true}` |
 | `GET /users/<name>/profile` | | `{"name", "profile"}`, the OpenVPN client profile |
+| `POST /users/<name>/apple-profile` | `{"password"}` | `{"name", "profile"}`, the Apple configuration profile of IKEv2 access (see Apple VPN profile) |
 | `POST /users/<name>/otp` | | `{"name", "secret", "uri"}`, a new TOTP secret; nothing is stored |
 | `PUT /users/<name>/otp` | `{"secret", "code"}` | the user, once the code matches the secret |
 | `DELETE /users/<name>/otp` | | the user |
+| `DELETE /users/<name>/passkeys` | | the user, without passkeys |
 | `PUT /users/<name>/console` | `{"enabled", "account"?}`; only with a token of `vpn-router-token` | the user |
 
 A failure is `{"error": ...}` with 400 for an invalid request, 404 for a user that does not
 exist or is a service account, 409 for a user that exists and 500 otherwise. `/users` does not
 list service accounts; `/service-accounts` serves them. `/users` works whether or not OpenVPN or
-road-warrior access is enabled; the profile needs OpenVPN. Passwords, private keys and TOTP
+IKEv2 access is enabled; the profile needs OpenVPN. Passwords, private keys and TOTP
 secrets cross the internal network in plain HTTP, like the token.
 
 ```bash
@@ -1050,16 +1268,19 @@ curl -H "Authorization: Bearer $TOKEN" -H 'Content-Type: application/json' \
 
 | Request | Body | Answer |
 | --- | --- | --- |
-| `GET /service-accounts` | | `{"service_accounts": [{"name", "display_name", "description", "internal", "enabled", "locked", "email", ...}, ...]}`, each as `/users` shows a user |
-| `POST /service-accounts` | `{"name", "password", "display_name"?, "description"?, "email"?}` | 201 and the account |
-| `PUT /service-accounts/<name>` | any of `{"display_name", "description", "email"}`; `""` removes one | the account |
+| `GET /service-accounts` | | `{"service_accounts": [{"name", "display_name", "description", "internal", "enabled", "locked", "email", "redirect_uris", "post_logout_redirect_uris", "allowed_groups", ...}, ...], "oidc": {"enabled", "issuer"}}`, each as `/users` shows a user, and the issuer of the OpenID Provider, `null` while it is disabled |
+| `POST /service-accounts` | `{"name", "password", "display_name"?, "description"?, "email"?, "redirect_uris"?, "post_logout_redirect_uris"?, "allowed_groups"?}` | 201 and the account |
+| `PUT /service-accounts/<name>` | any of `{"display_name", "description", "email", "redirect_uris", "post_logout_redirect_uris", "allowed_groups"}`; `""` removes one of the first three, `[]` the values of the others | the account |
 | `PUT /service-accounts/<name>/password` | `{"password": ...}` | the account |
 | `POST /service-accounts/<name>/disable` | | the account |
 | `POST /service-accounts/<name>/enable` | | the account |
 | `POST /service-accounts/<name>/unlock` | | the account |
 | `DELETE /service-accounts/<name>` | | `{"name", "removed": true}` |
 
-A display name has at most 64 printable characters and a description at most 256. The internal
+A display name has at most 64 printable characters and a description at most 256. The client
+settings are lists of at most 16 values: URIs of `https`, or of `http` for `localhost`,
+`127.0.0.1` or `::1`, without a fragment and of at most 1024 characters, and names of existing
+groups (see OpenID Provider). The internal
 service accounts, `internal` true, are only listed: every other request on one gets 403, as the
 router manages them, their display name and description included. A failure is otherwise as for
 `/users`, with 404 also for a name that is not a service account.
@@ -1075,8 +1296,13 @@ router manages them, their display name and description included. A failure is o
 | `PUT /account/password` | `{"current_password", "current_code", "password"}` | the user |
 | `POST /account/otp` | | `{"name", "secret", "uri"}`, a new TOTP secret; nothing is stored |
 | `PUT /account/otp` | `{"current_password", "current_code", "secret", "code"}` | the user, once the code matches the secret |
+| `POST /account/passkeys` | `{"current_password", "current_code"}` | `{"id", "options"}`: a pending registration, valid 2 minutes, and the options of `navigator.credentials.create` in their JSON form |
+| `PUT /account/passkeys` | `{"id", "credential", "label"?}`, `credential` the browser's answer as its `toJSON()` gives it; `label` at most 64 characters, `Passkey` without one | the user |
+| `DELETE /account/passkeys/<id>` | | the user |
+| `POST /account/profile` | `{"current_password", "current_code"}` | `{"name", "profile"}`, the user's OpenVPN client profile |
+| `POST /account/apple-profile` | `{"current_password", "current_code", "password"}` | `{"name", "profile"}`, the user's Apple configuration profile of IKEv2 access (see Apple VPN profile) |
 
-`current_code` is needed only for a user enrolled for TOTP. A wrong current password or code gets
+`current_code` is needed only for a user enrolled for TOTP; removing a passkey needs neither. A wrong current password or code gets
 403 and counts as a failed login; slapd accepts each code once, so a code used to sign in is not
 accepted again, and a change right after signing in waits for the next code. A user enrols or
 replaces the enrolment; removing it is left to `/users` and `vpn-router-user`. Changing the
@@ -1142,14 +1368,26 @@ The answer of `GET /backup` holds:
 
 A change is made, checked and applied as for `/site-to-site`.
 
+### The /metrics/settings API
+
+`/metrics/settings` shows and changes the settings of the metrics service, with the same token as
+`/users`.
+
+| Request | Body | Answer |
+| --- | --- | --- |
+| `GET /metrics/settings` | | `{"settings"}`: the `metrics` section without `otlp_password`, with `otlp_password_set` |
+| `PUT /metrics/settings` | any of the settings of the `metrics` section; an empty or absent `otlp_password` keeps the secret, and an empty `otlp_username` removes it | `{"settings"}` |
+
+A change is made, checked and applied as for `/site-to-site`.
+
 ### The /remote-access API
 
-`/remote-access` shows and changes the remote access systems, IKEv2 road-warrior (`p2s`),
+`/remote-access` shows and changes the remote access systems, IKEv2 (`p2s`),
 OpenVPN (`openvpn`) and WireGuard (`wireguard`), with the same token as `/users`.
 
 | Request | Body | Answer |
 | --- | --- | --- |
-| `GET /remote-access` | | `{"p2s", "openvpn", "wireguard", "running", "local_fqdn"}` |
+| `GET /remote-access` | | `{"p2s", "openvpn", "wireguard", "running", "local_fqdn", "wireguard_server"}`; `wireguard_server` is `{"public_key", "endpoint", "allowed_ips", "dns"}`: the router's WireGuard public key (`null` before setup made it), `<wan.local_fqdn>:<wireguard.listen_port>` (`null` without a name), the networks a peer reaches through the tunnel, the router's local CIDRs and the WireGuard network, and the addresses of the remote access clients' resolver (`[]` while it does not run) |
 | `PUT /remote-access/<system>` | any of the settings of the section `p2s`, `openvpn` or `wireguard` | the section |
 
 `running` tells for each system whether setup runs it. IKEv2 and OpenVPN run once enabled with an
@@ -1216,7 +1454,7 @@ it does not redirect to HTTPS.
 package's drop-in `/usr/lib/systemd/system/caddy.service.d/vpn-router.conf` makes `caddy.service`
 read; `caddy.service` does not start before the file exists, and `/etc/caddy/Caddyfile` is not
 used. Setup starts Caddy, reloads it when the file changes, and stops it and removes the file when
-HTTPS is off. In the firewall it opens port 80 on the external interface and the HTTPS ports on the
+HTTPS is off and no web site is served (see Web sites). In the firewall it opens port 80 on the external interface and the HTTPS ports on the
 internal and the external interface, and ports 80 and 443 on both when `pki.publish` has `http-80`
 and `https-default`, on which Caddy serves only the CA files (see Certificates). Caddy calls both services on `127.0.0.1`, where they listen
 whatever `web.listen` and the manager's `listen` say, and passes the client's address in
@@ -1257,6 +1495,185 @@ does on its own: remove the source and the key, run `apt-get update`, and instal
 with `apt-get install --allow-downgrades caddy=<version>`, the version `apt-cache policy caddy`
 lists for the archive.
 
+## OpenID Provider
+
+While `oidc.enabled` is `true`, the status web service is an OpenID Provider (OpenID Connect
+Core 1.0) for the users of the directory. Its issuer is the web service's HTTPS site,
+`https://<wan.local_fqdn>:<https.web_port>`, without the port when it is 443; the web service
+answers it only on `127.0.0.1`, where Caddy passes the requests, so the provider is never reached
+over plain HTTP. The setting needs `web.enabled`, `https.enabled` and `wan.local_fqdn`.
+
+```sh
+vpn-config-edit set --restart oidc.enabled true
+curl https://router.example.com:7444/.well-known/openid-configuration
+```
+
+| Endpoint | Purpose |
+| --- | --- |
+| `GET /.well-known/openid-configuration` | The discovery document |
+| `GET /oidc/jwks` | The public key ID tokens are signed with |
+| `GET`, `POST /oidc/authorize` | The authorization code flow; the sign-in page while the browser has no session |
+| `POST /oidc/token` | Exchanges a code or a refresh token for tokens |
+| `GET`, `POST /oidc/userinfo` | The claims of the user of an access token |
+| `GET /oidc/logout` | Ends the session (RP-initiated logout) |
+
+A client is a service account with at least one redirect URI: its name is the `client_id` and its
+password the `client_secret`, sent with HTTP Basic authentication (`client_secret_basic`) or in
+the body of the token request (`client_secret_post`). The password is checked with a bind, so 5
+wrong secrets lock the client for 15 minutes. Its settings are:
+
+- redirect URIs, where the provider sends the browser back with a code, matched exactly; a URI
+  uses `https`, or `http` for `localhost`, `127.0.0.1` or `::1`;
+- post-logout redirect URIs, where `/oidc/logout` may send the browser afterwards;
+- allowed groups: only their members may sign in to the client; without any, every user who is
+  not a service account may.
+
+```sh
+echo 'cl1ent-s3cret' | vpn-router-user add 3f2b8c1e-9a4d-4e6f-8b2a-1c5d7e9f0a3b --service \
+    --display-name Grafana --redirect-uri https://grafana.example.com/login/generic_oauth \
+    --post-logout-redirect-uri https://grafana.example.com/login --allowed-group ops
+vpn-router-user update 3f2b8c1e-9a4d-4e6f-8b2a-1c5d7e9f0a3b --allowed-group ''
+```
+
+The flow is the authorization code flow with PKCE, whose `code_challenge_method` must be `S256`;
+the implicit and hybrid flows, and the password and client credentials grants, are refused. A
+registered client is trusted, so a user is not asked for consent. A user signs in on the
+provider's page with the name, the password and, when enrolled, the TOTP code, or with a passkey
+(see Passkeys); failed sign-ins count towards the lockout, and `POST /oidc/login` takes at most
+10 calls a minute from one client address, as `/auth` does. A
+disabled, locked or removed user, a service account, and a user outside the client's allowed
+groups cannot sign in, and the codes and tokens already issued to such a user stop working. The
+sign-in starts a session, a cookie of the issuer's `/oidc/` path valid for 8 hours, so later
+requests of any client go on without the page; `prompt=login` and `max_age` ask for a new sign-in,
+and `prompt=none` answers `login_required` without a session.
+
+| Scope | Claims |
+| --- | --- |
+| `openid` (required) | `sub`, the `entryUUID` of the user's entry |
+| `profile` | `preferred_username` (the user name), `name`, `given_name`, `family_name` |
+| `email` | `email` |
+| `groups` | `groups`, the names of the user's groups |
+
+The claims of the scopes granted are in the ID token and in the answer of `/oidc/userinfo`. ID
+tokens are RS256 JWTs, valid for 5 minutes, with `auth_time` and `amr` (`pwd`, `pwd` and `otp`, or
+`hwk` and `user` for a passkey), signed with an RSA key of 3072 bits that the web service makes on
+its first run, `/etc/vpn-router/oidc.key` (root only), and named in the JWKS by its RFC 7638
+thumbprint. A code is valid for 1 minute and used once, an access token for 5 minutes, and a
+refresh token for 8 hours and used once: each refresh answers a new one with a new ID token. The
+codes, tokens and sessions are kept, as their SHA-256, in the database of the refresh tokens of
+`/auth`. Changing a user's password, disabling, unlocking or removing the user ends its sessions
+and revokes its codes and tokens.
+
+## Web sites
+
+While `sites.enabled` is `true`, Caddy serves static web sites from folders on the router, each
+`/var/lib/vpn-router/sites/<name>`. The sites are rows of the database `vpn-router-sites`, which
+the web service creates on its first run with its own role and the password in
+`/etc/vpn-router/sites-database.secret`; they are managed with `vpn-router-site`, `/sites` and the
+Router Manager, each change applied by restarting `vpn-router-setup`. A site has:
+
+| Setting | Meaning |
+| --- | --- |
+| `name` | 1 to 31 lowercase letters, digits and hyphens, starting with a letter; also the name of its folder |
+| `enabled` | Whether Caddy serves it |
+| `hosts` | The host names (or IP addresses) Caddy answers on the port, the names TLS clients send as SNI; none answers any name |
+| `port` | The TCP port, 443 by default |
+| `listen` | `internal`, `external` (the default) or `both`: the interfaces whose firewall opens the port |
+| `tls` | `none` (plain HTTP), `acme` (Let's Encrypt, the default), `ca` (certificates of an issuing CA of `pki.issuing_cas`, named by `ca`) or `file` (`certificate` and `private_key`, PEM) |
+| `index_file` | The file served for a folder, `index.html` by default |
+| `spa` | Whether a path without a file is served the site's `index_file`, for single-page applications |
+| `editors` | The group whose members may change the site's files besides the admins |
+
+A site may not take a port of the router's own services (SSH, `web.port`, the HTTPS ports, the
+metrics ports, the Router Manager's, `sites.webdav_port`, 7446, 53, the bootstrap ports, a TCP
+`openvpn.port` and `docker.exposed_ports`) or `wan.local_fqdn`. Enabled sites on one port need host
+names of their own, the same `listen` and the same kind of TLS (plain HTTP or HTTPS). A site of
+`acme` needs host names, without wildcards or addresses, that resolve to the router, and port 80,
+which setup opens on the external interface. The certificate of `file` must be the key's and name
+the hosts; it is written to `/etc/caddy/vpn-router-sites/<name>` (root, group `caddy`, 0640). An
+issuing CA of `ca` is given to Caddy as the ACME servers' CAs are, in `/etc/caddy/vpn-router-pki`;
+its certificates are trusted by clients that trust the router's root. Caddy runs while HTTPS is
+ready or a site is served; while the sites cannot be read, setup leaves the Caddyfile as it is.
+
+```sh
+vpn-config-edit set --restart sites.enabled true
+vpn-router-site add www --host www.example.com --host example.com --spa
+vpn-router-site add intranet --host intranet.example.lan --port 8443 --listen internal --tls ca --ca web \
+    --editors web-team
+vpn-router-site update www --no-enabled
+vpn-router-site remove intranet --content
+```
+
+`vpn-router-site remove` keeps the folder without `--content`. Renaming a group renames it in the
+sites; a group a site has cannot be removed.
+
+### Site files
+
+The files of a site are read and written through the web service (see The /sites API) by the
+admins and the members of the site's `editors` group, and through WebDAV. An upload is at most
+`sites.upload_max_mb` MiB (512 by default, at most 10240); a zip archive is extracted into a
+folder, and one with an absolute path, a `..`, a link, more than 10000 members or more content than
+the limit is refused before anything is written. Files are written with mode 0644 and folders with
+0755, so Caddy reads them.
+
+### WebDAV
+
+While `sites.webdav` is `true` and HTTPS is ready, `vpn-router-setup` runs
+`vpn-router-webdav.service`, `rclone serve webdav` on `127.0.0.1:7446`, which Caddy serves at
+`https://<wan.local_fqdn>:<sites.webdav_port>` (7445 by default) and the firewall opens on both
+interfaces. A user signs in with the name and password of the router's directory, followed by the
+TOTP code for an enrolled user; an admin sees a folder for every site, any other user the folders of
+the sites whose `editors` group the user is a member of, and no folder means no access. rclone writes
+an upload to its cache in `/var/cache/vpn-router-webdav` and to the site's folder a few seconds
+later. rclone is installed from the Ubuntu archive by `vpn-router-install@webdav.service` when it is
+missing.
+
+```sh
+vpn-config-edit set --restart sites.webdav true
+```
+
+### Name server
+
+While `dns.enabled` is `true`, `vpn-router-setup` runs PowerDNS (`pdns.service`) as the
+primary name server of the router's domains, on port 53 of the addresses of `dns.listen`
+(`internal`, `external`, the default, or `both`), which the firewall opens for UDP and TCP. The
+domains and records are in the database `vpn-router-dns` (password in `/etc/vpn-router/dns-database.secret`),
+read by PowerDNS's gpgsql backend; setup writes the settings
+`/etc/powerdns/pdns.d/vpn-router.conf` (root, group `pdns`, 0640) and installs `pdns-server` and
+`pdns-backend-pgsql` from the Ubuntu archive with `vpn-router-install@dns.service` when they are
+missing, without the recommended bind backend.
+
+| Setting | Meaning |
+| --- | --- |
+| `dns.nameserver` | The name server's host name, the primary NS and the SOA's primary of every domain |
+| `dns.addresses` | The public addresses of the domains' apexes, of the name server in a domain it is inside, and of the sites' host names |
+| `dns.ttl` | The TTL of the records and the SOA's negative TTL of a domain without its own, 60 to 86400 seconds, 300 by default |
+
+The domains are added with `/dns` or the Router Manager, each with:
+
+- **Site records**: every host name of an enabled site gets A and AAAA records of `dns.addresses`
+  in the closest domain it is in, when that domain has site records;
+- **TTL**: the TTL of its records, `dns.ttl` when not set;
+- **Secondaries**: name servers, each a host name, which becomes an NS of the domain, and the
+  address it transfers the domain from. The router notifies that address of every change and
+  allows it zone transfers (AXFR); a secondary's name inside the domain gets an A or AAAA record of
+  that address;
+- **Manual records** (A, AAAA, CNAME, TXT, MX, SRV, CAA), served too, but not those of a name and
+  type the domain's own records have.
+
+A domain inside another domain of the router is delegated from it with NS records. Setup writes the
+domains at each run, and after each change through `/dns`; the SOA's serial grows only when the
+records change. While IKEv2, OpenVPN or WireGuard is enabled, dnsmasq answers their clients on port 53
+of the addresses of `p2s.dns_listen`, by default the internal address, so `dns.listen` must not
+share an interface with it. The parent zone of each domain must delegate it to `dns.nameserver` and
+the secondaries, with glue records for name servers inside the domain.
+
+```sh
+vpn-config-edit set dns.nameserver ns1.example.com
+vpn-config-edit set dns.addresses 203.0.113.10
+vpn-config-edit set --restart dns.enabled true
+```
+
 ## Metrics
 
 While `metrics.enabled` is `true`, `vpn-router-setup` runs `vpn-router-metrics`, which every minute
@@ -1267,7 +1684,7 @@ takes a sample of the router with `psutil`:
 - the free and the total space of `/`;
 - the bytes received and sent per second on the external and the internal interface;
 - the 1, 5 and 15 minute load averages;
-- the VPN clients of each enabled VPN system: road-warrior (IPsec P2S) and OpenVPN clients, and
+- the VPN clients of each enabled VPN system: IKEv2 and OpenVPN clients, and
   WireGuard peers with a handshake in the last 3 minutes;
 - for each site-to-site connection that is set up: whether it is up (1 or 0), the bytes and the
   packets per second received and sent through its child SAs since the previous sample, and the
@@ -1385,6 +1802,8 @@ A backup holds the state that `vpn-router-setup` cannot make again:
 | `files/<path>` | Each `psk_file` outside `/etc/vpn-router` |
 | `ldap/vpn-router.ldif` | The user directory, written by `slapcat`: users, groups, service accounts, password hashes and TOTP secrets, and the PKI: the CAs and their keys, the root key while it is on the router, and the certificates issued, with the keys of the router's and the users' certificates |
 | `postgresql/vpn-router.dump` | With `backup.metrics`, the database of the metrics and the refresh tokens, written by `pg_dump -Fc` |
+| `/var/lib/vpn-router/sites` | The folders of the web sites |
+| `postgresql/vpn-router-sites.dump`, `postgresql/vpn-router-dns.dump` | The databases of the web sites and of the name server, once they exist |
 | `manifest.json` | The host, the time, the version of the package, the schedule and the items |
 
 The files and the directory are copied while the locks of the configuration and of the users are held, so no change of the API or the command-line tools falls between them; `pg_dump` reads a snapshot of its own. The copy is staged in `/var/lib/vpn-router/backup/staging`, which is removed after each run. The backup holds every secret of the router, so keep it as safe as the router itself.
@@ -1450,10 +1869,10 @@ Each run is recorded in `/var/lib/vpn-router/backup.json`, which `/backup` and t
 
 `restore` is only on the command line. It shows what the backup holds and asks for `yes`, which `--yes` gives. It then:
 
-1. stops the web service, the metrics service and slapd;
+1. stops the web service, the metrics service, WebDAV, PowerDNS and slapd;
 2. puts back the files;
 3. loads the directory with `slapadd` into an empty `/var/lib/ldap/vpn-router`;
-4. sets the database role's password to the restored `database.secret`, and restores the database with `pg_restore --clean` when the backup holds it;
+4. sets the database roles' passwords to the restored password files, and restores each database the backup holds with `pg_restore --clean`;
 5. restarts `vpn-router-setup`, which regenerates everything else, followed by WireGuard, OpenVPN, strongSwan and the Router Manager, and reloads ufw.
 
 What it replaces is kept in `/var/lib/vpn-router/backup/before-restore/<UTC time>`. To restore onto a new VM, install the package first and let `vpn-router-setup` run once. The restored configuration names the interfaces of the old VM, so change them with `vpn-config-edit` if they differ.
@@ -1472,23 +1891,25 @@ interfaces it listens on.
 
 `apt-get remove` stops `vpn-router-docker`, which removes the Docker rules. It terminates the
 tunnels and takes `wg-quick@wg0`, `openvpn-server@vpn-router`, `caddy`, `vpn-router-metrics`,
-`vpn-router-backup.timer` and `vpn-router-pki.timer` down, but leaves the
+`vpn-router-webdav`, `vpn-router-backup.timer` and `vpn-router-pki.timer` down, but leaves the
 configuration in place. `strongswan` is left enabled, since it is a shared service that
 may be in use by something else.
 
 `apt-get purge` additionally removes the generated files and the firewall rules, restoring
 `/etc/ufw/before.rules` to its original content, and hands `vpn-router.json` back to `ucf`
 before deleting it so a later reinstall starts clean. It also removes the web service's
-signing key, the password file of the metrics service account, and the database of the refresh
-tokens and the metrics, its role and their password
-file when the package created them, and Caddy's configuration `/etc/caddy/vpn-router.Caddyfile`; the certificate in
+signing key and the OpenID Provider's, the password file of the metrics service account, the database of the refresh
+tokens and the metrics and those of the web sites and the name server, their roles and their password
+files when the package created them, Caddy's configuration `/etc/caddy/vpn-router.Caddyfile` and PowerDNS's
+`/etc/powerdns/pdns.d/vpn-router.conf`; the certificate in
 `/var/lib/caddy` belongs to the `caddy` package. It removes the backup timer's schedule, the
-record of the last backup, the published CA files, the copies of the ACME CAs in
-`/etc/caddy/vpn-router-pki` and OpenVPN's CA and CRL files. Caddy stays installed, and with it the
-source of Caddy's repository. Key material, users and backups are never deleted:
+record of the last backup, the published CA files, the copies of the CAs in
+`/etc/caddy/vpn-router-pki`, the sites' certificates in `/etc/caddy/vpn-router-sites` and OpenVPN's CA and CRL files.
+Caddy, rclone and PowerDNS stay installed, and with Caddy the
+source of its repository. Key material, users, content and backups are never deleted:
 `/etc/vpn-router/ldap`, `/etc/vpn-router/rclone.conf`, the user directory in slapd with the PKI, the WireGuard
-key pair, everything under `/etc/swanctl`, the archives in `backup.path` and
-`/var/lib/vpn-router/backup/before-restore` are left alone.
+key pair, everything under `/etc/swanctl`, the folders of the web sites in `/var/lib/vpn-router/sites`, the archives in
+`backup.path` and `/var/lib/vpn-router/backup/before-restore` are left alone.
 
 ## Building
 

debian-package/debian/changelog

@@ -1,3 +1,365 @@
+vpn-router (0.35.2-1) unstable; urgency=medium
+
+  fix: the web service answers /, /status and /status/full again while IKEv2 runs.
+
+  * The status of IKEv2 clients is collected again; the requests that
+    collect the status were dropped with a NameError since 0.35.1.
+
+ -- Slawomir Koszewski <slawek@koszewscy.waw.pl>  Thu, 29 Oct 2026 19:03:16 +0100
+
+vpn-router (0.35.1-1) unstable; urgency=medium
+
+  update: the router web service is split into the package vpnrouter_web, with one module per family of paths.
+
+  * /usr/lib/vpn-router/web initializes and serves; the package
+    /usr/lib/vpn-router/vpnrouter_web/ answers the requests, with a module
+    for the status, the sign-in, the identities, the connections, backups,
+    the PKI, logs, web sites, DNS, metrics and the shell. The paths, the
+    answers and the log messages are the same.
+
+ -- Slawomir Koszewski <slawek@koszewscy.waw.pl>  Thu, 29 Oct 2026 18:20:50 +0100
+
+vpn-router (0.35.0-1) unstable; urgency=medium
+
+  feature: vre opens files from the Router Manager's shell in the editor of its Shell page.
+
+  * vpn-router-editor FILE..., or vre, in the shell of the Router Manager
+    opens the files in the editor of the Shell page and returns at once;
+    outside that shell it exits with status 2.
+  * GET, PUT and DELETE /shell/editor/<session>/<id> read, save and close
+    a file opened so, as the shell's console account; a save is refused
+    with 409 when the file changed since it was read.
+  * The editor takes regular files of UTF-8 text up to 1 MiB, at most 20
+    per shell, while the shell lives.
+
+ -- Slawomir Koszewski <slawek@koszewscy.waw.pl>  Thu, 29 Oct 2026 18:02:27 +0100
+
+vpn-router (0.34.0-1) unstable; urgency=medium
+
+  feature: the web service shows and changes the settings of the metrics service at /metrics/settings, and OpenVPN starts on a new router, as setup installs CRLs that revoke nothing.
+
+  * GET and PUT /metrics/settings show and change the metrics section;
+    otlp_password is never shown, an empty one keeps it, and an empty
+    otlp_username removes it.
+  * A CRL without revoked certificates is installed for strongSwan and
+    OpenVPN.
+
+ -- Slawomir Koszewski <slawek@koszewscy.waw.pl>  Wed, 28 Oct 2026 22:00:00 +0100
+
+vpn-router (0.33.3-1) unstable; urgency=medium
+
+  fix: vpn-router-setup runs on a new installation once libpq can be found.
+
+  * The vpn-router-setup unit waits, with wait-for-libpq, until libpq is in
+    the linker cache before it runs setup.
+  * The package starts vpn-router-setup without waiting for it.
+
+ -- Slawomir Koszewski <slawek@koszewscy.waw.pl>  Wed, 28 Oct 2026 21:00:00 +0100
+
+vpn-router (0.33.2-1) unstable; urgency=medium
+
+  fix: the router's IPsec remote access is called IKEv2 instead of road-warrior.
+
+  * The README, the package description, the installer's questions, the
+    status page, the messages of the web service and the examples say
+    IKEv2 access and IKEv2 clients; the strongSwan connection keeps its
+    name, road-warrior.
+
+ -- Slawomir Koszewski <slawek@koszewscy.waw.pl>  Tue, 27 Oct 2026 23:00:00 +0100
+
+vpn-router (0.33.1-1) unstable; urgency=medium
+
+  fix: the name server is the primary of any number of domains, each with secondary name servers and a switch for the records of the sites.
+
+  * The domains, their secondaries and manual records are kept in the
+    vpn-router-dns database and changed through /dns/domains; dns.zone is
+    removed.
+  * Each domain is served as a primary zone: the router and its
+    secondaries are its NS, and each secondary's address is notified of
+    changes and may transfer the zone.
+  * A domain with site records gives the host names of the enabled sites
+    in it A and AAAA records of dns.addresses; a domain inside another is
+    delegated from it.
+  * Manual records belong to a domain; those of the single zone are
+    dropped.
+
+ -- Slawomir Koszewski <slawek@koszewscy.waw.pl>  Tue, 27 Oct 2026 20:00:00 +0100
+
+vpn-router (0.33.0-1) unstable; urgency=medium
+
+  feature: road-warrior clients resolve the domains of the new setting p2s.dns_domains with the router's resolver.
+
+  * p2s.dns_domains lists up to 16 domains; setup pushes them to IKEv2
+    clients as INTERNAL_DNS_DOMAIN (RFC 8598, attribute 25) of the
+    road-warrior pool.
+  * The Apple VPN profile names them as match domains of the router's
+    resolver, which macOS and iOS use for those domains.
+
+ -- Slawomir Koszewski <slawek@koszewscy.waw.pl>  Tue, 27 Oct 2026 18:00:00 +0100
+
+vpn-router (0.32.1-1) unstable; urgency=medium
+
+  fix: a VPN user downloads the own OpenVPN client profile through /account, with the current password and code.
+
+  * POST /account/profile answers the user's OpenVPN client profile; it
+    needs the current password and, when enrolled, a code.
+
+ -- Slawomir Koszewski <slawek@koszewscy.waw.pl>  Tue, 27 Oct 2026 16:00:00 +0100
+
+vpn-router (0.32.0-1) unstable; urgency=medium
+
+  feature: the web service gives Apple VPN profiles that set up IKEv2 road-warrior access on macOS, iOS and iPadOS.
+
+  * POST /users/<name>/apple-profile and POST /account/apple-profile answer
+    an unsigned .mobileconfig with the P2S CA and the root CA, the user's
+    certificate and key as a PKCS#12 encrypted with the password of the
+    request, and an IKEv2 VPN to wan.local_fqdn with EAP-TLS and the
+    proposals of the road-warrior connection.
+  * A user's own profile needs the current password and, when enrolled, a
+    code.
+
+ -- Slawomir Koszewski <slawek@koszewscy.waw.pl>  Tue, 27 Oct 2026 14:00:00 +0100
+
+vpn-router (0.31.3-1) unstable; urgency=medium
+
+  fix: WireGuard clients may use the router's DNS resolver, which runs while WireGuard does, and /remote-access names its addresses for their configuration.
+
+  * The firewall opens port 53 of the remote access clients' resolver for
+    the WireGuard network, as it does for the IKEv2 and OpenVPN pools.
+  * The resolver runs while WireGuard is the only remote access enabled.
+  * GET /remote-access answers the resolver's addresses as
+    wireguard_server.dns.
+  * dns.listen may not share an interface with p2s.dns_listen while
+    WireGuard is enabled either.
+
+ -- Slawomir Koszewski <slawek@koszewscy.waw.pl>  Tue, 27 Oct 2026 12:00:00 +0100
+
+vpn-router (0.31.2-1) unstable; urgency=medium
+
+  fix: dnsmasq answers the remote access clients' DNS queries, so they no longer get the router's own host name with all its addresses from systemd-resolved.
+
+  * vpn-router-resolver.service runs dnsmasq on the addresses of
+    p2s.dns_listen, forwarding to systemd-resolved's stub on 127.0.0.53;
+    names without a dot are not forwarded. The package depends on
+    dnsmasq-base.
+  * systemd-resolved keeps its loopback stubs only; setup removes the
+    drop-in that made it listen for the clients.
+  * /logs shows the journal of vpn-router-resolver, vpn-router-webdav and
+    pdns.
+
+ -- Slawomir Koszewski <slawek@koszewscy.waw.pl>  Tue, 27 Oct 2026 11:00:00 +0100
+
+vpn-router (0.31.1-1) unstable; urgency=medium
+
+  fix: the remote access clients' resolver answers on the internal address by default, chosen by p2s.dns_listen, so the name server can take port 53 of the external addresses.
+
+  * The new setting p2s.dns_listen chooses the addresses of the resolver the
+    road-warrior and OpenVPN clients are given: internal, the default,
+    external or both. The firewall opens port 53 for the client pools on
+    those addresses only.
+  * dns.listen is refused only when it shares an interface with
+    p2s.dns_listen while IKEv2 or OpenVPN is enabled.
+
+ -- Slawomir Koszewski <slawek@koszewscy.waw.pl>  Mon, 26 Oct 2026 23:00:00 +0100
+
+vpn-router (0.31.0-1) unstable; urgency=medium
+
+  feature: Caddy serves static web sites from folders on the router, defined in their own database, with files uploaded through the web service or WebDAV, and an optional PowerDNS name server answers for a zone of the sites.
+
+  * The new database vpn-router-sites holds the web sites: host names,
+    port, interfaces, TLS (none, Let's Encrypt, an issuing CA or a
+    certificate and key), index file, single-page fallback and the group
+    whose members change the files. sites.enabled serves them from
+    /var/lib/vpn-router/sites/<name>; setup writes their blocks into the
+    Caddyfile and opens their ports, and Caddy also runs without HTTPS of
+    the router while a site is served.
+  * vpn-router-site lists, shows, adds, changes and removes the sites, and
+    bash completes it.
+  * /sites manages the sites and the settings of the sites section, and
+    under /sites/<name>/files/ lists, downloads, uploads, extracts zip
+    archives into, creates, renames and removes the files of a site, up to
+    sites.upload_max_mb; members of the site's editors group may use its
+    files.
+  * sites.webdav runs rclone's WebDAV server of the sites' folders behind
+    Caddy on sites.webdav_port, signing users in with the directory and
+    showing each the sites it may change.
+  * dns.enabled runs PowerDNS with its PostgreSQL backend in the new
+    database vpn-router-dns for dns.zone on the addresses of dns.listen:
+    SOA, NS, the A and AAAA records of dns.addresses for the zone, the
+    name server and the sites' host names in the zone, and manual records
+    added with /dns.
+  * rclone and PowerDNS are installed from the Ubuntu archive by
+    vpn-router-install@<feature>.service when their feature is on.
+  * Backups hold the sites' folders and the dumps of both databases; a
+    restore puts them back. Purge removes the databases, their roles and
+    password files, and the settings of PowerDNS.
+  * Renaming a group renames it in the sites; a group a site has cannot be
+    removed.
+
+ -- Slawomir Koszewski <slawek@koszewscy.waw.pl>  Mon, 26 Oct 2026 21:00:00 +0100
+
+vpn-router (0.30.0-1) unstable; urgency=medium
+
+  feature: the web service serves the last lines of the journal of the router's units and of the log files web.log_files lists, at /logs.
+
+  * GET /logs lists the units whose journal and the files whose lines it
+    serves; GET /logs/journal?unit=&lines= and /logs/file?path=&lines=
+    answer the last lines, 200 by default and at most 1000, a file read
+    from its last MiB. Units and files outside the lists are refused.
+  * The new setting web.log_files lists the absolute paths of the log
+    files, at most 32.
+
+ -- Slawomir Koszewski <slawek@koszewscy.waw.pl>  Mon, 26 Oct 2026 19:00:00 +0100
+
+vpn-router (0.29.0-1) unstable; urgency=medium
+
+  feature: vpn-config-edit set and remove take --restart, which applies the change with vpn-router-setup and waits for it.
+
+  * vpn-config-edit set --restart and remove --restart restart
+    vpn-router-setup after writing the configuration and wait until it has
+    applied the change; a failed run exits with status 1 and points to its
+    journal. Bash completes --restart.
+
+ -- Slawomir Koszewski <slawek@koszewscy.waw.pl>  Mon, 26 Oct 2026 17:00:00 +0100
+
+vpn-router (0.28.0-1) unstable; urgency=medium
+
+  feature: bash completes the vpn-* commands, their options and the names they take.
+
+  * Bash completes the commands, options and arguments of vpn-router-user,
+    vpn-router-group, vpn-router-token, vpn-config-edit, vpn-router-backup,
+    vpn-router-ca and vpn-router-caddy, from
+    /usr/share/bash-completion/completions; for root also the users,
+    groups, issuing CAs, templates, settings and site-to-site connections.
+  * The package recommends bash-completion.
+
+ -- Slawomir Koszewski <slawek@koszewscy.waw.pl>  Mon, 26 Oct 2026 16:00:00 +0100
+
+vpn-router (0.27.0-1) unstable; urgency=medium
+
+  feature: the web service is an OpenID Provider, which signs the directory's users in to other systems, the clients being service accounts with redirect URIs.
+
+  * oidc.enabled turns on the OpenID Provider at the issuer
+    https://<wan.local_fqdn>:<https.web_port>, with discovery, JWKS,
+    authorize, token, userinfo and RP-initiated logout under /oidc/,
+    answered only through Caddy. The authorization code flow with PKCE
+    S256 and refresh tokens are offered; ID tokens are RS256, signed with
+    /etc/vpn-router/oidc.key, which the web service makes on its first run.
+  * Users sign in on the provider's page with the password and the TOTP
+    code or with a passkey; the session lasts 8 hours. The scopes openid,
+    profile, email and groups give sub (the entry's entryUUID), the names,
+    the e-mail address and the user's groups.
+  * A service account with redirect URIs is a client: its name is the
+    client ID and its password the secret. Its redirect URIs,
+    post-logout redirect URIs and allowed groups are set with
+    vpn-router-user add/update --redirect-uri, --post-logout-redirect-uri
+    and --allowed-group, and in /service-accounts as redirect_uris,
+    post_logout_redirect_uris and allowed_groups; GET /service-accounts
+    also answers the issuer. vpn-router-user list shows them.
+  * Changing a user's password, disabling, unlocking or removing the user
+    also revokes the user's codes, tokens and sessions of the provider.
+  * Renaming a group renames it in the clients that allow it, and a group
+    a client allows cannot be removed.
+  * The package depends on python3-oauthlib and python3-jwt.
+
+ -- Slawomir Koszewski <slawek@koszewscy.waw.pl>  Mon, 26 Oct 2026 14:00:00 +0100
+
+vpn-router (0.26.2-1) unstable; urgency=medium
+
+  fix: a service account may be named by a GUID in lowercase, as the Router Manager proposes for a new one.
+
+  * vpn-router-user add --service and POST /service-accounts take a GUID
+    in lowercase as the name, besides a user name; users and groups keep
+    the rules of user names.
+
+ -- Slawomir Koszewski <slawek@koszewscy.waw.pl>  Mon, 26 Oct 2026 10:00:00 +0100
+
+vpn-router (0.26.1-1) unstable; urgency=medium
+
+  fix: the package installs vpnrouter_passkeys, without which the web service and vpn-router-user do not start.
+
+  * /usr/lib/vpn-router/vpnrouter_passkeys.py is part of the package.
+
+ -- Slawomir Koszewski <slawek@koszewscy.waw.pl>  Mon, 26 Oct 2026 08:45:00 +0100
+
+vpn-router (0.26.0-1) unstable; urgency=medium
+
+  feature: users sign in to the Router Manager with passkeys, and console login needs a TOTP token, so a user without one is refused the shell, SSH and sudo.
+
+  * Console login is switched on only for a user enrolled for TOTP. A user
+    whose console login is on without a token is refused POST /shell, the
+    shell's WebSocket, SSH and sudo; an open shell ends within a minute of
+    the token's removal or of console login being switched off, and
+    removing the token ends the sessions of the user's own POSIX account.
+  * POST /auth/passkey and /auth/passkey/complete sign a user in with a
+    passkey of wan.local_fqdn, giving the tokens of /auth; POST /auth also
+    answers the user's name.
+  * POST, PUT /account/passkeys and DELETE /account/passkeys/<id> add, with
+    the current password and code, and remove the user's passkeys, at most
+    10, kept in the new attribute vpnRouterPasskey; DELETE
+    /users/<name>/passkeys and vpn-router-user passkeys-remove remove all
+    passkeys of a user.
+  * Users have passkeys, [{"id", "label", "created"}], in /users and
+    /account; vpn-router-user list shows their number and a console login
+    refused for want of a TOTP token.
+  * The package depends on python3-fido2.
+
+ -- Slawomir Koszewski <slawek@koszewscy.waw.pl>  Tue, 03 Nov 2026 08:00:00 +0100
+
+vpn-router (0.25.4-1) unstable; urgency=medium
+
+  fix: a shell opens without the password and code again while the user's last use of a shell is within web.shell_auth_timeout minutes.
+
+  * New setting web.shell_auth_timeout, 15 minutes by default, 0 to 1440:
+    POST /shell without a password gives a ticket while the user's last
+    sign-in of POST /shell or keystroke in a shell is within it, and a
+    null ticket otherwise; 0 asks for the password and code every time.
+
+ -- Slawomir Koszewski <slawek@koszewscy.waw.pl>  Tue, 03 Nov 2026 06:00:00 +0100
+
+vpn-router (0.25.3-1) unstable; urgency=medium
+
+  fix: /config gives the state of caddy.service with the installed Caddy, for the Router Manager's Web page.
+
+  * caddy of /config is {"version", "source", "service"}.
+
+ -- Slawomir Koszewski <slawek@koszewscy.waw.pl>  Tue, 03 Nov 2026 05:00:00 +0100
+
+vpn-router (0.25.2-1) unstable; urgency=medium
+
+  fix: wireguard.address must be the router's own address in its network, not the network or broadcast address, from which the peers' addresses are told apart.
+
+  * A wireguard.address that is the network or the broadcast address of a
+    network larger than /31, such as 192.168.232.0/24, is refused with the
+    first address of the network as the example.
+
+ -- Slawomir Koszewski <slawek@koszewscy.waw.pl>  Tue, 03 Nov 2026 02:30:00 +0100
+
+vpn-router (0.25.1-1) unstable; urgency=medium
+
+  fix: /remote-access gives the router's WireGuard public key, endpoint and allowed IPs, which a peer's configuration needs.
+
+  * GET /remote-access answers wireguard_server: {"public_key",
+    "endpoint", "allowed_ips"}.
+
+ -- Slawomir Koszewski <slawek@koszewscy.waw.pl>  Tue, 03 Nov 2026 01:30:00 +0100
+
+vpn-router (0.25.0-1) unstable; urgency=medium
+
+  feature: a VPN user has WireGuard peers, each a device with its public key and IPs, kept in the directory and written into wg0.conf by setup.
+
+  * PUT /users/<name> takes wireguard_peers, [{"public_key", "ips"}],
+    which replaces the user's peers; keys are unique and IPs may not
+    overlap another peer's or cover the router's WireGuard address.
+  * GET /users answers each user's wireguard_peers and the WireGuard
+    endpoint's enabled and address.
+  * Setup writes a [Peer] section into wg0.conf for each peer of a user
+    who is not disabled, in a marked block, and keeps the peers added by
+    hand; changing a user's peers, disabling, enabling or removing a user
+    with peers applies at once.
+
+ -- Slawomir Koszewski <slawek@koszewscy.waw.pl>  Tue, 03 Nov 2026 00:00:00 +0100
+
 vpn-router (0.24.1-1) unstable; urgency=medium
 
   fix: the status gives the number of connected OpenVPN clients at most 5 seconds old instead of up to a minute.

debian-package/debian/control

@@ -22,6 +22,9 @@ Depends: ${misc:Depends},
          python3-jinja2,
          python3-ldap,
          python3-pyotp,
+         python3-fido2,
+         python3-jwt,
+         python3-oauthlib,
          python3-psycopg,
          python3-psutil,
          python3-prometheus-client,
@@ -35,20 +38,27 @@ Depends: ${misc:Depends},
          openvpn-auth-ldap,
          iproute2,
          systemd-resolved,
+         dnsmasq-base,
          zstd
+Recommends: bash-completion
 Suggests: caddy,
           rclone,
+          pdns-server,
+          pdns-backend-pgsql,
           proxmox-backup-client-static
-Description: Linux VPN router with IPSec, road-warrior, OpenVPN and WireGuard support
+Description: Linux VPN router with IPSec, IKEv2, OpenVPN and WireGuard support
  Configures a Linux host or virtual machine as a VPN router: site-to-site
  IKEv2 IPSec (strongSwan swanctl) with pre-shared keys or certificates,
- optional road-warrior access using EAP-TLS, optional OpenVPN with a
+ optional IKEv2 access using EAP-TLS, optional OpenVPN with a
  certificate and a password per user, kept in a local LDAP directory, optional
  WireGuard, and the routing, NAT, MSS clamping and firewall rules a router
  needs. Its two-level CA, whose root may be kept offline, has issuing CAs for
  the VPN clients, for site-to-site and for general use, and publishes their
  certificates and CRLs. Caddy, installed by the package from the Ubuntu
- archive or from Caddy's repository, serves HTTPS. It keeps metrics of the
+ archive or from Caddy's repository, serves HTTPS and static web sites, whose
+ files are uploaded through the web service or WebDAV, an optional PowerDNS
+ name server answers for a zone of the sites, and an optional OpenID
+ Provider signs the directory's users in to other systems. It keeps metrics of the
  router in PostgreSQL and serves them for an OpenTelemetry Collector, and
  makes scheduled backups to a local folder, copied to the cloud with rclone,
  or to a Proxmox Backup Server. Nothing in the package is specific to a cloud

debian-package/debian/dirs

@@ -2,3 +2,4 @@ etc/vpn-router
 usr/lib/vpn-router
 usr/lib/vpn-router/vpnrouter_platforms
 usr/share/vpn-router/templates
+var/lib/vpn-router/sites

debian-package/debian/install

@@ -4,13 +4,21 @@ src/usr/lib/vpn-router/vpnrouter_ldap.py              usr/lib/vpn-router/
 src/usr/lib/vpn-router/vpnrouter_net.py               usr/lib/vpn-router/
 src/usr/lib/vpn-router/vpnrouter_serve.py             usr/lib/vpn-router/
 src/usr/lib/vpn-router/vpnrouter_users.py             usr/lib/vpn-router/
+src/usr/lib/vpn-router/vpnrouter_passkeys.py          usr/lib/vpn-router/
 src/usr/lib/vpn-router/vpnrouter_auth.py              usr/lib/vpn-router/
+src/usr/lib/vpn-router/vpnrouter_oidc.py              usr/lib/vpn-router/
 src/usr/lib/vpn-router/vpnrouter_metrics.py           usr/lib/vpn-router/
 src/usr/lib/vpn-router/vpnrouter_status.py            usr/lib/vpn-router/
 src/usr/lib/vpn-router/vpnrouter_backup.py            usr/lib/vpn-router/
 src/usr/lib/vpn-router/vpnrouter_pki.py               usr/lib/vpn-router/
+src/usr/lib/vpn-router/vpnrouter_sites.py             usr/lib/vpn-router/
+src/usr/lib/vpn-router/vpnrouter_dns.py               usr/lib/vpn-router/
+src/usr/lib/vpn-router/install-packages               usr/lib/vpn-router/
+src/usr/lib/vpn-router/webdav-auth                    usr/lib/vpn-router/
 src/usr/lib/vpn-router/openvpn-same-user              usr/lib/vpn-router/
 src/usr/lib/vpn-router/openvpn-issuer                 usr/lib/vpn-router/
+src/usr/lib/vpn-router/editor-file                    usr/lib/vpn-router/
+src/usr/bin/vpn-router-editor                         usr/bin/
 src/usr/sbin/vpn-router-user                          usr/sbin/
 src/usr/sbin/vpn-router-group                         usr/sbin/
 src/usr/sbin/vpn-router-token                         usr/sbin/
@@ -18,15 +26,19 @@ src/usr/sbin/vpn-config-edit                          usr/sbin/
 src/usr/sbin/vpn-router-backup                        usr/sbin/
 src/usr/sbin/vpn-router-ca                            usr/sbin/
 src/usr/sbin/vpn-router-caddy                         usr/sbin/
+src/usr/sbin/vpn-router-site                          usr/sbin/
 src/usr/lib/vpn-router/configure                      usr/lib/vpn-router/
 src/usr/lib/vpn-router/docker-rules                   usr/lib/vpn-router/
 src/usr/lib/vpn-router/setup                          usr/lib/vpn-router/
 src/usr/lib/vpn-router/web                            usr/lib/vpn-router/
+src/usr/lib/vpn-router/vpnrouter_web/*.py             usr/lib/vpn-router/vpnrouter_web/
 src/usr/lib/vpn-router/metrics                        usr/lib/vpn-router/
 src/usr/lib/vpn-router/bootstrap                      usr/lib/vpn-router/
 src/usr/lib/vpn-router/wait-for-libpq                 usr/lib/vpn-router/
 src/usr/lib/vpn-router/generate-config                usr/lib/vpn-router/
 src/usr/lib/vpn-router/vpnrouter_platforms/*.py       usr/lib/vpn-router/vpnrouter_platforms/
 src/usr/share/vpn-router/templates/*                  usr/share/vpn-router/templates/
+src/usr/share/vpn-router/sql/*                        usr/share/vpn-router/sql/
+src/usr/share/bash-completion/completions/*.bash      usr/share/bash-completion/completions/
 src/usr/lib/systemd/system/caddy.service.d/vpn-router.conf usr/lib/systemd/system/caddy.service.d/
 src/usr/share/doc/vpn-router/vpn-router.json.example  usr/share/doc/vpn-router/

debian-package/debian/links

@@ -0,0 +1 @@
+usr/bin/vpn-router-editor usr/bin/vre

debian-package/debian/postinst

@@ -71,9 +71,11 @@ case "$1" in
         # setting the forward policy all belong to vpn-router-setup, which does
         # them only once the configuration says this host is a router.
 
-        # The web service waits for libpq in the linker cache, which dpkg
-        # refreshes after this script, so it is started without waiting for it.
+        # The setup and web services wait for libpq in the linker cache, which
+        # dpkg refreshes after this script, so they are started without waiting
+        # for them.
         if [ -d /run/systemd/system ]; then
+            systemctl --no-block restart vpn-router-setup.service >/dev/null 2>&1 || true
             systemctl --no-block restart vpn-router-web.service >/dev/null 2>&1 || true
         fi
         ;;

debian-package/debian/postrm

@@ -11,10 +11,10 @@ strip_ufw_blocks() {
 
     tmp="$(mktemp)"
     awk '
-        /^# (IPSEC|WIREGUARD|OPENVPN|P2S DNS|WEB|BOOTSTRAP|MANAGER|HTTPS|METRICS|ROUTER FORWARD|ROUTER NAT|ROUTER MSS) RULES START$/ {
+        /^# (IPSEC|WIREGUARD|OPENVPN|P2S DNS|WEB|BOOTSTRAP|MANAGER|HTTPS|METRICS|SITES|DNS|ROUTER FORWARD|ROUTER NAT|ROUTER MSS) RULES START$/ {
             skip = 1; pending = 0; next
         }
-        /^# (IPSEC|WIREGUARD|OPENVPN|P2S DNS|WEB|BOOTSTRAP|MANAGER|HTTPS|METRICS|ROUTER FORWARD|ROUTER NAT|ROUTER MSS) RULES END$/ {
+        /^# (IPSEC|WIREGUARD|OPENVPN|P2S DNS|WEB|BOOTSTRAP|MANAGER|HTTPS|METRICS|SITES|DNS|ROUTER FORWARD|ROUTER NAT|ROUTER MSS) RULES END$/ {
             skip = 0; next
         }
         skip { next }
@@ -46,12 +46,15 @@ case "$1" in
         rm -f /etc/swanctl/conf.d/site-to-site.conf \
               /etc/swanctl/conf.d/road-warrior.conf \
               /etc/systemd/resolved.conf.d/p2s-forwarder.conf \
+              /etc/vpn-router/dnsmasq.conf \
               /etc/wireguard/wg0.conf \
               /etc/openvpn/server/vpn-router.conf \
               /etc/openvpn/server/vpn-router-ldap.conf \
               /etc/caddy/vpn-router.Caddyfile \
+              /etc/powerdns/pdns.d/vpn-router.conf \
               /etc/vpn-router/vpn-router.json \
               /etc/vpn-router/web.key \
+              /etc/vpn-router/oidc.key \
               /etc/vpn-router/metrics.secret \
               /etc/systemd/system/vpn-router-backup.timer.d/schedule.conf \
               /etc/sudoers.d/vpn-router \
@@ -62,7 +65,7 @@ case "$1" in
         # The name service no longer looks up the console accounts of the router's directory.
         sed -i '/^passwd:/s/ ldap\b//' /etc/nsswitch.conf
         rm -rf /var/lib/vpn-router/backup/staging /var/lib/vpn-router/backup/restore \
-               /var/lib/vpn-router/pki-publish /etc/caddy/vpn-router-pki \
+               /var/lib/vpn-router/pki-publish /etc/caddy/vpn-router-pki /etc/caddy/vpn-router-sites \
                /etc/openvpn/server/vpn-router-ca.pem /etc/openvpn/server/vpn-router-crl.pem
         rmdir --ignore-fail-on-non-empty /var/lib/vpn-router/backup /var/lib/vpn-router 2>/dev/null || true
 
@@ -73,12 +76,23 @@ case "$1" in
         fi
         rm -f /etc/vpn-router/database.secret
 
-        # Key material and users are not package state: /etc/vpn-router/pki,
+        # The databases and roles of the web sites and of the name server, when the package created them.
+        for database in vpn-router-sites vpn-router-dns; do
+            secret="/etc/vpn-router/${database#vpn-router-}-database.secret"
+            if [ -f "$secret" ] && command -v psql >/dev/null 2>&1; then
+                runuser -u postgres -- psql -X -q -c "DROP DATABASE IF EXISTS \"$database\"" || true
+                runuser -u postgres -- psql -X -q -c "DROP ROLE IF EXISTS \"$database\"" || true
+            fi
+            rm -f "$secret"
+        done
+
+        # Key material, users and content are not package state: /etc/vpn-router/pki,
         # /etc/vpn-router/ldap, /etc/vpn-router/rclone.conf, the user directory
         # in slapd, the WireGuard key pair, everything under /etc/swanctl, the
-        # backups and what a restore replaced are left in place. Caddy stays
-        # installed, so its repository, which vpn-router-caddy configures, stays
-        # too.
+        # files of the web sites in /var/lib/vpn-router/sites, the backups and
+        # what a restore replaced are left in place. Caddy, rclone and PowerDNS
+        # stay installed, so Caddy's repository, which vpn-router-caddy
+        # configures, stays too.
         rmdir --ignore-fail-on-non-empty /etc/vpn-router 2>/dev/null || true
         ;;
 esac

debian-package/debian/rules

@@ -3,7 +3,7 @@
 	dh $@
 
 override_dh_installsystemd:
-	dh_installsystemd --name=vpn-router-setup
+	dh_installsystemd --name=vpn-router-setup --no-start
 	dh_installsystemd --name=vpn-router-docker
 	dh_installsystemd --name=vpn-router-web --no-start
 	dh_installsystemd --name=vpn-router-metrics --no-enable --no-start
@@ -11,3 +11,6 @@ override_dh_installsystemd:
 	dh_installsystemd --name=vpn-router-backup --no-enable --no-start
 	dh_installsystemd --name=vpn-router-pki --no-enable --no-start
 	dh_installsystemd --name=vpn-router-caddy --no-enable --no-start
+	dh_installsystemd --name=vpn-router-webdav --no-enable --no-start
+	dh_installsystemd --name=vpn-router-resolver --no-enable --no-start
+	dh_installsystemd --name=vpn-router-install@ --no-enable --no-start

debian-package/debian/templates

@@ -4,7 +4,7 @@ Choices: none, generic, azure, gcp
 Default: none
 Description: Platform:
  Which platform this router runs on. The choice loads platform-specific
- additions, such as the provider DNS resolver for road-warrior clients.
+ additions, such as the provider DNS resolver for IKEv2 clients.
  .
  none defers configuration entirely: the package installs its files and
  changes nothing on the machine. Choose it when the router will be configured
@@ -58,7 +58,7 @@ Type: string
 Default:
 Description: Local router FQDN:
  Fully-qualified domain name of this router (for example
- router.example.com). Used as the road-warrior server identity and
+ router.example.com). Used as the IKEv2 server identity and
  certificate common name.
 
 Template: vpn-router/local_id_mode
@@ -122,15 +122,15 @@ Description: Pre-shared key (PSK):
 Template: vpn-router/p2s_enabled
 Type: boolean
 Default: false
-Description: Enable road-warrior (P2S) access?
+Description: Enable IKEv2 access?
  If enabled, this router accepts IKEv2 EAP-TLS connections from individual
  clients, with certificates of the router's P2S issuing CA.
 
 Template: vpn-router/p2s_address_pool
 Type: string
 Default:
-Description: Road-warrior address pool:
- CIDR block assigned to road-warrior clients (for example 172.16.0.0/24).
+Description: IKEv2 address pool:
+ CIDR block assigned to IKEv2 clients (for example 172.16.0.0/24).
 
 Template: vpn-router/pki_root_name
 Type: string

debian-package/debian/vpn-router.vpn-router-install@.service

@@ -0,0 +1,10 @@
+[Unit]
+Description=VPN Router installation of the packages of %i
+Documentation=file:/usr/share/doc/vpn-router/README.md
+After=network-online.target
+Wants=network-online.target
+
+[Service]
+Type=oneshot
+ExecStart=/usr/lib/vpn-router/install-packages %i
+TimeoutStartSec=20min

debian-package/debian/vpn-router.vpn-router-resolver.service

@@ -0,0 +1,15 @@
+[Unit]
+Description=VPN Router DNS resolver of the remote access clients
+Documentation=file:/usr/share/doc/vpn-router/README.md
+After=network-online.target systemd-resolved.service
+Wants=network-online.target
+ConditionPathExists=/etc/vpn-router/dnsmasq.conf
+
+[Service]
+Type=simple
+ExecStart=/usr/sbin/dnsmasq --keep-in-foreground --pid-file= --log-facility=- --conf-file=/etc/vpn-router/dnsmasq.conf
+Restart=on-failure
+RestartSec=5
+
+[Install]
+WantedBy=multi-user.target

debian-package/debian/vpn-router.vpn-router-setup.service

@@ -6,6 +6,7 @@ After=network-online.target docker.service postgresql.service
 
 [Service]
 Type=oneshot
+ExecStartPre=/usr/lib/vpn-router/wait-for-libpq
 ExecStart=/usr/lib/vpn-router/setup
 RemainAfterExit=yes
 

debian-package/debian/vpn-router.vpn-router-web.service

@@ -15,7 +15,7 @@ NoNewPrivileges=yes
 ProtectSystem=strict
 RuntimeDirectory=vpn-router
 RuntimeDirectoryPreserve=yes
-ReadWritePaths=-/etc/vpn-router -/etc/swanctl/x509crl -/etc/openvpn/server -/var/lib/vpn-router/pki-publish
+ReadWritePaths=-/etc/vpn-router -/etc/swanctl/x509crl -/etc/openvpn/server -/var/lib/vpn-router/pki-publish -/var/lib/vpn-router/sites
 ProtectHome=yes
 PrivateTmp=yes
 

debian-package/debian/vpn-router.vpn-router-webdav.service

@@ -0,0 +1,21 @@
+[Unit]
+Description=VPN Router WebDAV of the web sites' folders
+Documentation=file:/usr/share/doc/vpn-router/README.md
+After=network-online.target slapd.service postgresql.service
+Wants=network-online.target
+
+[Service]
+Type=simple
+ExecStart=/usr/bin/rclone serve webdav --addr 127.0.0.1:7446 --auth-proxy /usr/lib/vpn-router/webdav-auth --config /dev/null --cache-dir /var/cache/vpn-router-webdav --vfs-cache-mode writes --umask 022
+Restart=on-failure
+RestartSec=15
+NoNewPrivileges=yes
+ProtectSystem=strict
+ReadWritePaths=/var/lib/vpn-router/sites
+CacheDirectory=vpn-router-webdav
+RuntimeDirectory=vpn-router-webdav
+ProtectHome=yes
+PrivateTmp=yes
+
+[Install]
+WantedBy=multi-user.target

debian-package/src/usr/bin/vpn-router-editor

@@ -0,0 +1,71 @@
+#!/usr/bin/python3
+"""Open files in the editor of the Router Manager's Shell page, from the shell of that page; vre is its short name.
+
+Each file is named to the router's web service over SOCKET with the shell's session,
+$VPN_ROUTER_SHELL, which the web service sets in the shells it starts; the Shell page then shows
+the file in a tab of its editor, where it is read and saved. The command returns at once. A
+relative path is taken from the current directory, and a file that does not exist is created when
+it is saved. The exit status is 0 when every file was opened, 1 when the web service refused one,
+with its reason, and 2 outside the Router Manager's shell or for an invalid request. -h or --help
+shows the usage.
+
+  vre FILE...
+"""
+
+import argparse
+import json
+import os
+import socket
+import sys
+
+#: The socket of the router's web service that opens files in the editor of a shell.
+SOCKET = '/run/vpn-router/editor.sock'
+
+#: Seconds to wait for the web service's answer.
+TIMEOUT = 10
+
+
+class Parser(argparse.ArgumentParser):
+    """An argument parser whose errors end with status 2."""
+
+    def error(self, message):
+        print(f'{self.prog}: {message}; see {self.prog} --help', file=sys.stderr)
+        sys.exit(2)
+
+
+def opened(session, path):
+    """Ask the web service to open the file in the editor of the session; None, or the reason it refused."""
+    with socket.socket(socket.AF_UNIX, socket.SOCK_STREAM) as connection:
+        connection.settimeout(TIMEOUT)
+        connection.connect(SOCKET)
+        connection.sendall(json.dumps({'session': session, 'path': path}).encode() + b'\n')
+        answer = json.loads(connection.makefile('rb').readline() or b'{}')
+    return None if answer.get('ok') is True else str(answer.get('error', 'no answer'))
+
+
+def main(argv):
+    prog = os.path.basename(sys.argv[0])
+    parser = Parser(prog=prog, description="Open files in the editor of the Router Manager's Shell page.")
+    parser.add_argument('files', nargs='+', metavar='FILE', help='a file to open')
+    options = parser.parse_args(argv)
+    session = os.environ.get('VPN_ROUTER_SHELL', '')
+    if not session:
+        print(f'{prog}: {prog} works only in the shell of the Router Manager', file=sys.stderr)
+        return 2
+    status = 0
+    for name in options.files:
+        path = os.path.abspath(os.path.expanduser(name))
+        try:
+            reason = opened(session, path)
+        except (OSError, ValueError) as exc:
+            reason = f'the web service cannot be reached: {exc}'
+        if reason:
+            print(f'{prog}: {path}: {reason}', file=sys.stderr)
+            status = 1
+        else:
+            print(f'Opened {path} in the editor of the Shell page.')
+    return status
+
+
+if __name__ == '__main__':
+    sys.exit(main(sys.argv[1:]))

debian-package/src/usr/lib/vpn-router/editor-file

@@ -0,0 +1,82 @@
+#!/usr/bin/python3
+"""Read or write a file of the editor of the Router Manager's Shell page, as the user it runs as.
+
+The web service runs it with systemd-run --uid=<console account> --pipe, outside its sandbox, so the
+file is read and written with the rights of the shell's user. The version of a content is the
+hexadecimal SHA-256 of its bytes; a missing file has the version of the empty content.
+
+  editor-file read PATH             print the content of the file; nothing for a missing file
+  editor-file write PATH VERSION    replace the content with standard input when the file still has
+                                    VERSION, writing in place, so its owner, mode and links stay;
+                                    a missing file is created
+
+Only regular files of at most MAX_BYTES bytes of UTF-8 text are read and written. The exit status
+is 0 on success, 2 for a file that is refused, with the reason on standard error, 3 when the file
+does not have VERSION any more, and 1 for any other failure.
+"""
+
+import hashlib
+import os
+import sys
+
+#: The largest file the editor opens, in bytes.
+MAX_BYTES = 1024 * 1024
+
+
+class Refused(Exception):
+    """A file the editor does not open or write; status is the exit status."""
+
+    def __init__(self, message, status=2):
+        super().__init__(message)
+        self.status = status
+
+
+def text(data, path):
+    """The bytes when they are UTF-8 text of at most MAX_BYTES; Refused otherwise."""
+    if len(data) > MAX_BYTES:
+        raise Refused(f'{path} is larger than {MAX_BYTES // 1024} KiB')
+    try:
+        data.decode('utf-8')
+    except UnicodeDecodeError:
+        raise Refused(f'{path} is not UTF-8 text')
+    return data
+
+
+def current(path):
+    """The content of the file, b'' when it does not exist; Refused for a file that is not a regular one."""
+    if not os.path.lexists(path):
+        return b''
+    if not os.path.isfile(path):
+        raise Refused(f'{path} is not a regular file')
+    with open(path, 'rb') as handle:
+        return text(handle.read(MAX_BYTES + 1), path)
+
+
+def main(argv):
+    if len(argv) < 2 or (argv[0], len(argv)) not in (('read', 2), ('write', 3)):
+        print('usage: editor-file read PATH | editor-file write PATH VERSION', file=sys.stderr)
+        return 2
+    path = argv[1]
+    try:
+        if argv[0] == 'read':
+            sys.stdout.buffer.write(current(path))
+            return 0
+        content = text(sys.stdin.buffer.read(MAX_BYTES + 1), path)
+        if hashlib.sha256(current(path)).hexdigest() != argv[2]:
+            raise Refused(f'{path} changed since it was read', 3)
+        with open(path, 'r+b' if os.path.lexists(path) else 'xb') as handle:
+            handle.write(content)
+            handle.truncate()
+            handle.flush()
+            os.fsync(handle.fileno())
+    except Refused as refused:
+        print(refused, file=sys.stderr)
+        return refused.status
+    except OSError as exc:
+        print(f'{exc.filename or path}: {exc.strerror}', file=sys.stderr)
+        return 1
+    return 0
+
+
+if __name__ == '__main__':
+    sys.exit(main(sys.argv[1:]))

debian-package/src/usr/lib/vpn-router/install-packages

@@ -0,0 +1,36 @@
+#!/usr/bin/python3
+"""Install the packages of a feature from the Ubuntu archive, then restart vpn-router-setup without waiting.
+
+Run by vpn-router-install@<feature>.service, which vpn-router-setup starts when the feature is on and its packages are
+missing: webdav (rclone) and dns (PowerDNS with its gpgsql backend). Recommended packages are left out, so PowerDNS
+comes without its bind backend. A failure is a message on standard error and the exit status 1.
+
+  install-packages FEATURE
+"""
+
+import os
+import subprocess
+import sys
+
+#: The packages of each feature.
+FEATURES = {'webdav': ['rclone'], 'dns': ['pdns-server', 'pdns-backend-pgsql']}
+
+#: apt-get, waiting up to ten minutes for dpkg's lock, which a package installation that runs setup holds.
+APT = ['apt-get', '-o', 'DPkg::Lock::Timeout=600']
+
+
+def main():
+    if len(sys.argv) != 2 or sys.argv[1] not in FEATURES:
+        sys.exit(f'usage: install-packages {"|".join(FEATURES)}')
+    environment = dict(os.environ, DEBIAN_FRONTEND='noninteractive')
+    for args in ([*APT, 'update'], [*APT, '-y', '--no-install-recommends', '-o', 'Dpkg::Options::=--force-confdef',
+                                    '-o', 'Dpkg::Options::=--force-confold', 'install', *FEATURES[sys.argv[1]]]):
+        print(f'$ {" ".join(args)}', flush=True)
+        if subprocess.run(args, env=environment).returncode != 0:
+            sys.exit(f'install-packages: {args[0]} failed')
+    subprocess.run(['systemctl', 'restart', '--no-block', 'vpn-router-setup.service'])
+    return 0
+
+
+if __name__ == '__main__':
+    sys.exit(main())

debian-package/src/usr/lib/vpn-router/metrics

@@ -7,7 +7,7 @@ disables the unit.
 Every SAMPLE_SECONDS, on the minute, a sample is taken with psutil: the CPU utilization since the
 previous sample, the memory used and in total, the free and the total space of /, the bytes
 received and sent per second on the external and the internal interface, and the load averages;
-and the VPN clients of each enabled VPN system (vpnrouter_status): road-warrior (p2s) and
+and the VPN clients of each enabled VPN system (vpnrouter_status): IKEv2 (p2s) and
 OpenVPN clients and WireGuard peers with a recent handshake; and of each site-to-site connection
 that is set up, whether it is up, the bytes and packets per second through its child SAs since
 the previous sample, and how long its IKE SA has been up. The interfaces, the enabled systems and

debian-package/src/usr/lib/vpn-router/setup

@@ -7,7 +7,7 @@ and service reloads. Idempotent - a second run changes nothing.
 
 Until a run has succeeded (SETUP_DONE), every run starts the bootstrap
 services, BOOTSTRAP_UNITS, which show the progress and the failure recorded in
-SETUP_STATE on BOOTSTRAP_PORTS, and the firewall opens those ports on the
+SETUP_STATE on vpnrouter.BOOTSTRAP_PORTS, and the firewall opens those ports on the
 internal interface. The first successful run writes SETUP_DONE, closes the
 ports and stops the bootstrap services; a failed run leaves them running.
 
@@ -33,15 +33,18 @@ sys.path.insert(0, os.path.dirname(os.path.realpath(__file__)))
 import ldap
 
 import vpnrouter
+import vpnrouter_auth
+import vpnrouter_dns
 import vpnrouter_ldap
 import vpnrouter_pki
+import vpnrouter_sites
 import vpnrouter_users
 from vpnrouter import fail, warn
 
 BEFORE_RULES = pathlib.Path('/etc/ufw/before.rules')
 UFW_DEFAULTS = pathlib.Path('/etc/default/ufw')
 WG_DIR       = pathlib.Path('/etc/wireguard')
-WEB_STATE    = pathlib.Path('/run/vpn-router/web.json')
+WEB_STATE    = vpnrouter.WEB_STATE
 
 #: The state, the current step and the failure of the last run, which the bootstrap services show.
 SETUP_STATE  = pathlib.Path('/run/vpn-router/setup.json')
@@ -49,18 +52,12 @@ SETUP_STATE  = pathlib.Path('/run/vpn-router/setup.json')
 #: Written once a run has succeeded; until then setup runs the bootstrap services and opens their ports.
 SETUP_DONE   = pathlib.Path('/var/lib/vpn-router/setup.done')
 
-#: The units of the bootstrap services, and their ports: the Router Manager's and the router's.
+#: The units of the bootstrap services, whose ports are vpnrouter.BOOTSTRAP_PORTS.
 BOOTSTRAP_UNITS = ('vpn-router-bootstrap.service', 'vpn-router-manager-bootstrap.service')
-BOOTSTRAP_PORTS = (17080, 17081)
-
-#: The Router Manager, vpn-router-manager, when it is installed, and its settings.
-MANAGER        = pathlib.Path('/usr/lib/vpn-router-manager/manager')
-MANAGER_CONFIG = pathlib.Path('/etc/vpn-router-manager/manager.json')
 
 #: The default admin of the Router Manager, {"username", "password"}, which its package writes from
 #: its debconf answers; setup creates the account and removes the file.
 MANAGER_ADMIN  = pathlib.Path('/etc/vpn-router-manager/admin.json')
-MANAGER_PORT   = 7080
 
 #: The password of the metrics service account, which setup makes and keeps (root only).
 METRICS_SECRET = pathlib.Path('/etc/vpn-router/metrics.secret')
@@ -77,9 +74,22 @@ CADDY_GROUP = 'caddy'
 #: The unit that installs Caddy from https.caddy_source with vpn-router-caddy, outside setup.
 CADDY_INSTALL_UNIT = 'vpn-router-caddy.service'
 
-#: The certificates and keys of the issuing CAs behind Caddy's ACME server, <name>/cert.pem and key.pem.
+#: The certificates and keys of the issuing CAs behind Caddy's ACME server and the sites of tls ca, <name>/cert.pem and
+#: key.pem.
 CADDY_PKI_DIR = pathlib.Path('/etc/caddy/vpn-router-pki')
 
+#: The certificates and keys of the sites of tls file, <site>/cert.pem and key.pem.
+CADDY_SITES_DIR = pathlib.Path('/etc/caddy/vpn-router-sites')
+
+#: The unit of dnsmasq, the resolver of the remote access clients.
+RESOLVER_UNIT = 'vpn-router-resolver.service'
+
+#: The unit of rclone's WebDAV server of the sites' folders.
+WEBDAV_UNIT = 'vpn-router-webdav.service'
+
+#: The unit that installs the packages of a feature with install-packages, outside setup; {} is the feature.
+INSTALL_UNIT = 'vpn-router-install@{}.service'
+
 #: The timer of vpn-router-ca maintain, which keeps the CRLs fresh.
 PKI_TIMER = 'vpn-router-pki.timer'
 
@@ -107,6 +117,8 @@ BLOCKS = (
     ('# MANAGER RULES START',       '# MANAGER RULES END'),
     ('# HTTPS RULES START',         '# HTTPS RULES END'),
     ('# METRICS RULES START',       '# METRICS RULES END'),
+    ('# SITES RULES START',         '# SITES RULES END'),
+    ('# DNS RULES START',           '# DNS RULES END'),
     ('# ROUTER FORWARD RULES START', '# ROUTER FORWARD RULES END'),
     ('# ROUTER NAT RULES START',    '# ROUTER NAT RULES END'),
     ('# ROUTER MSS RULES START',    '# ROUTER MSS RULES END'),
@@ -194,15 +206,6 @@ def is_configured(ctx):
                 vpnrouter.openvpn_ready(ctx)))
 
 
-def manager_port():
-    """The port of the Router Manager: port in its settings, or MANAGER_PORT when it is not set or not a port."""
-    try:
-        port = json.loads(MANAGER_CONFIG.read_text(encoding='utf-8')).get('port')
-    except (OSError, ValueError, AttributeError):
-        return MANAGER_PORT
-    return port if isinstance(port, int) and not isinstance(port, bool) and 1 <= port <= 65535 else MANAGER_PORT
-
-
 def filter_block(ctx):
     lines = [
         '',
@@ -240,11 +243,13 @@ def filter_block(ctx):
         lines += ['# OPENVPN RULES END']
 
     pools = [pool for ready, pool in ((vpnrouter.p2s_ready(ctx), ctx['p2s_address_pool']),
-                                      (vpnrouter.openvpn_ready(ctx), ctx['openvpn_pool'])) if ready]
-    if pools and ctx['local_addr_list']:
+                                      (vpnrouter.openvpn_ready(ctx), ctx['openvpn_pool']),
+                                      (vpnrouter.wg_ready(ctx), ctx['wg_network'])) if ready]
+    # The remote access clients' resolver answers on the addresses of p2s.dns_listen.
+    if pools and ctx['p2s_resolver_addrs']:
         lines += ['', '# P2S DNS RULES START']
         for pool in pools:
-            for address in ctx['local_addr_list']:
+            for address in ctx['p2s_resolver_addrs']:
                 lines += [
                     f'-A ufw-before-input -s {pool} -d {address} -p udp --dport 53 -j ACCEPT',
                     f'-A ufw-before-input -s {pool} -d {address} -p tcp --dport 53 -j ACCEPT',
@@ -265,12 +270,13 @@ def filter_block(ctx):
         lines += [
             '',
             '# BOOTSTRAP RULES START',
-            *(f'-A ufw-before-input -i {ctx["int_iface"]} -p tcp --dport {port} -j ACCEPT' for port in BOOTSTRAP_PORTS),
+            *(f'-A ufw-before-input -i {ctx["int_iface"]} -p tcp --dport {port} -j ACCEPT'
+              for port in vpnrouter.BOOTSTRAP_PORTS),
             '# BOOTSTRAP RULES END',
         ]
 
-    if MANAGER.exists() and interfaces:
-        port = manager_port()
+    if vpnrouter.MANAGER.exists() and interfaces:
+        port = vpnrouter.manager_port()
         lines += [
             '',
             '# MANAGER RULES START',
@@ -292,8 +298,9 @@ def filter_block(ctx):
         publish = ctx['pki_publish']
         ports = [port for wanted, port in ((ctx['web_enabled'] or 'https' in publish or ctx['pki_acme'],
                                             ctx['https_web_port']),
-                                           (MANAGER.exists(), ctx['https_manager_port']),
+                                           (vpnrouter.MANAGER.exists(), ctx['https_manager_port']),
                                            (vpnrouter.metrics_ready(ctx), ctx['metrics_https_port']),
+                                           (vpnrouter.webdav_ready(ctx), ctx['webdav_port']),
                                            ('http-80' in publish, vpnrouter.ACME_HTTP_PORT),
                                            ('https-default' in publish, vpnrouter.HTTPS_DEFAULT_PORT)) if wanted]
         lines += [
@@ -305,6 +312,32 @@ def filter_block(ctx):
             '# HTTPS RULES END',
         ]
 
+    # Each site's port is open on the interfaces of its listen; a site with a certificate of Let's Encrypt needs the HTTP
+    # challenge on the external interface.
+    by_listen = {'internal': [ctx['int_iface']], 'external': [ctx['wan_iface']],
+                 'both': [ctx['int_iface'], ctx['wan_iface']]}
+    sites = ctx['sites'] or []
+    rules = sorted({(name, site['port']) for site in sites for name in by_listen[site['listen']] if name})
+    if ctx['wan_iface'] and any(site['tls'] == 'acme' for site in sites):
+        rules = sorted(set(rules) | {(ctx['wan_iface'], vpnrouter.ACME_HTTP_PORT)})
+    if rules:
+        lines += [
+            '',
+            '# SITES RULES START',
+            *(f'-A ufw-before-input -i {name} -p tcp --dport {port} -j ACCEPT' for name, port in rules),
+            '# SITES RULES END',
+        ]
+
+    dns_interfaces = [name for name in by_listen[ctx['dns_listen']] if name] if vpnrouter.dns_ready(ctx) else []
+    if dns_interfaces:
+        lines += [
+            '',
+            '# DNS RULES START',
+            *(f'-A ufw-before-input -i {name} -p {protocol} --dport 53 -j ACCEPT'
+              for name in dns_interfaces for protocol in ('udp', 'tcp')),
+            '# DNS RULES END',
+        ]
+
     if vpnrouter.routing_ready(ctx):
         lines += ['', '# ROUTER FORWARD RULES START']
         for subnet in ctx['local_cidr_list']:
@@ -587,7 +620,7 @@ def manage_console(cfg):
             f'base {vpnrouter_ldap.BASE}',
             'filter passwd (&(objectClass=posixAccount)(vpnRouterConsoleLogin=TRUE))',
             f'nss_min_uid {vpnrouter_ldap.CONSOLE_UID_MIN}',
-            'pam_authz_search (&(objectClass=posixAccount)(uid=$username)(vpnRouterConsoleLogin=TRUE))',
+            'pam_authz_search (&(objectClass=posixAccount)(objectClass=oathTOTPUser)(uid=$username)(vpnRouterConsoleLogin=TRUE))',
             'pam_password_prohibit_message The password is changed in the Router Manager or with vpn-router-user.',
             '',
         ])
@@ -640,22 +673,50 @@ def manage_openvpn(ctx, changed):
         run(['systemctl', 'restart', unit], check=False)
 
 
-def manage_caddy(cfg, ctx):
-    """Run Caddy, the HTTPS proxy of the web service, the Router Manager and the metrics service, while HTTPS is ready, and stop it when not.
+def caddy_address(host, port, tls):
+    """The address of a site block of the Caddyfile: the host, an IPv6 address in brackets, and the port, with http://
+    for a plain HTTP site; no host answers any name."""
+    host = f'[{host}]' if ':' in host else host
+    return f'{"http://" if tls == "none" else ""}{host}:{port}'
 
-    CADDYFILE serves the web service on https.web_port, while the manager is installed the
-    manager on https.manager_port, and while metrics are enabled the metrics service on
-    metrics.https_port, all for wan.local_fqdn with a certificate from Let's Encrypt, and all
-    calling the service on its loopback address. It also serves the CA files of
-    vpnrouter_pki.PUBLISH_DIR at /pki/ on the endpoints of pki.publish that are Caddy's, and an
-    ACME server at /acme/<name>/ on https.web_port for each issuing CA with acme and a
-    certificate, whose certificate and key are copied to CADDY_PKI_DIR.
+
+def manage_resolver(changed):
+    """Run dnsmasq, the resolver of the remote access clients, while configure wrote its configuration, restarting it when
+    that changed, and stop it when not. It starts after systemd-resolved has left the addresses it takes."""
+    if not vpnrouter.RESOLVER_CONF.exists():
+        if unit_is_active(RESOLVER_UNIT):
+            run(['systemctl', 'disable', '--now', RESOLVER_UNIT], check=False)
+        return
+    if not unit_is_active(RESOLVER_UNIT):
+        run(['systemctl', 'enable', '--now', RESOLVER_UNIT], check=False)
+    elif 'resolver' in changed:
+        run(['systemctl', 'restart', RESOLVER_UNIT], check=False)
+
+
+def manage_caddy(cfg, ctx):
+    """Run Caddy, the HTTPS proxy of the router's services and the server of the web sites, while either is wanted, and
+    stop it when not.
+
+    While HTTPS is ready, CADDYFILE serves the web service on https.web_port, while the manager is installed the
+    manager on https.manager_port, while metrics are enabled the metrics service on metrics.https_port, and while
+    WebDAV is ready WebDAV on sites.webdav_port, all for wan.local_fqdn with a certificate from Let's Encrypt, and all
+    calling the service on its loopback address. It also serves the CA files of vpnrouter_pki.PUBLISH_DIR at /pki/ on
+    the endpoints of pki.publish that are Caddy's, and an ACME server at /acme/<name>/ on https.web_port for each
+    issuing CA with acme and a certificate.
+
+    It serves each site of ctx's sites from its folder, with the TLS of the site: an issuing CA of tls ca issues its
+    certificates, and the certificate and key of tls file are written to CADDY_SITES_DIR/<name>. The certificates and
+    keys of the issuing CAs of both are copied to CADDY_PKI_DIR. While the sites cannot be read (ctx's sites is None),
+    the Caddyfile is left as it is.
 
     Caddy is installed by CADDY_INSTALL_UNIT, outside setup, when it is missing or when
     https.caddy_source is upstream and Caddy's repository is not configured; the unit restarts
     setup, whose next run serves with it.
     """
-    if not vpnrouter.https_ready(ctx):
+    sites = ctx['sites']
+    if not vpnrouter.https_ready(ctx) and not sites:
+        if sites is None:
+            return
         vpnrouter.remove(CADDYFILE)
         if unit_is_active(CADDY_UNIT):
             run(['systemctl', 'disable', '--now', CADDY_UNIT], check=False)
@@ -669,21 +730,33 @@ def manage_caddy(cfg, ctx):
     if source == 'ubuntu' and vpnrouter.CADDY_APT_SOURCE.is_file():
         warn("https.caddy_source ubuntu is ignored: Caddy's repository is configured, and Caddy stays upstream's")
 
+    if sites is None:
+        warn('the web sites cannot be read; the Caddyfile is left as it is')
+        if not unit_is_active(CADDY_UNIT) and CADDYFILE.exists():
+            run(['systemctl', 'enable', '--now', CADDY_UNIT], check=False)
+        return
     try:
         group = grp.getgrnam(CADDY_GROUP).gr_gid
     except KeyError:
         fail(f'the group {CADDY_GROUP} does not exist; is the caddy package installed?')
+    https = vpnrouter.https_ready(ctx)
+    wanted = list(dict.fromkeys([*(ctx['pki_acme'] if https else []),
+                                 *(site['ca'] for site in sites if site['tls'] == 'ca')]))
     try:
-        credentials = {name: vpnrouter_pki.authority_files(name) for name in ctx['pki_acme']}
+        credentials = {name: vpnrouter_pki.authority_files(name) for name in wanted}
     except ldap.LDAPError as exc:
-        warn(f'the ACME servers are left out: the PKI cannot be read: {exc}')
+        warn(f'the ACME servers and the sites of issuing CAs are left out: the PKI cannot be read: {exc}')
         credentials = {}
-    acme = [name for name, files in credentials.items() if files is not None]
+    authorities = [name for name, files in credentials.items() if files is not None]
+    for site in sites:
+        if site['tls'] == 'ca' and site['ca'] not in authorities:
+            warn(f'site {site["name"]} is left out: issuing CA {site["ca"]} has no certificate')
+    sites = [site for site in sites if site['tls'] != 'ca' or site['ca'] in authorities]
     copied = False
     for folder in (CADDY_PKI_DIR.iterdir() if CADDY_PKI_DIR.is_dir() else []):
-        if folder.name not in acme:
+        if folder.name not in authorities:
             shutil.rmtree(folder)
-    for name in acme:
+    for name in authorities:
         folder = CADDY_PKI_DIR / name
         for path in (CADDY_PKI_DIR, folder):
             path.mkdir(mode=0o750, exist_ok=True)
@@ -691,12 +764,33 @@ def manage_caddy(cfg, ctx):
         for file, data in zip(('cert.pem', 'key.pem'), credentials[name]):
             copied |= vpnrouter_pki.write(folder / file, data, 0o640)
             os.chown(folder / file, 0, group)
-    authorities = vpnrouter.issuing_cas(cfg)
-    caddy_ctx = dict(ctx, manager_port=manager_port() if MANAGER.exists() else 0,
+    files = {site['name']: site for site in sites if site['tls'] == 'file'}
+    for folder in (CADDY_SITES_DIR.iterdir() if CADDY_SITES_DIR.is_dir() else []):
+        if folder.name not in files:
+            shutil.rmtree(folder)
+    for name, site in files.items():
+        folder = CADDY_SITES_DIR / name
+        for path in (CADDY_SITES_DIR, folder):
+            path.mkdir(mode=0o750, exist_ok=True)
+            os.chown(path, 0, group)
+        for file, data in (('cert.pem', site['certificate']), ('key.pem', site['private_key'])):
+            copied |= vpnrouter_pki.write(folder / file, data.strip().encode() + b'\n', 0o640)
+            os.chown(folder / file, 0, group)
+    vpnrouter_sites.ensure_folders(site['name'] for site in sites)
+    names = vpnrouter.issuing_cas(cfg)
+    caddy_ctx = dict(ctx, https=https, manager_port=vpnrouter.manager_port() if vpnrouter.MANAGER.exists() else 0,
                      pki_publish_dir=str(vpnrouter_pki.PUBLISH_DIR),
-                     acme_cas=[{'id': name, 'name': authorities[name]['name'].strip(),
-                                'cert': str(CADDY_PKI_DIR / name / 'cert.pem'),
-                                'key': str(CADDY_PKI_DIR / name / 'key.pem')} for name in acme])
+                     pki_cas=[{'id': name, 'name': names[name]['name'].strip(),
+                               'cert': str(CADDY_PKI_DIR / name / 'cert.pem'),
+                               'key': str(CADDY_PKI_DIR / name / 'key.pem')} for name in authorities],
+                     acme_cas=[name for name in authorities if https and name in ctx['pki_acme']],
+                     webdav=vpnrouter.webdav_ready(ctx), webdav_loopback_port=vpnrouter.WEBDAV_LOOPBACK_PORT,
+                     sites=[{'name': site['name'], 'tls': site['tls'], 'ca': site['ca'], 'spa': site['spa'],
+                             'index': site['index_file'], 'root': str(vpnrouter_sites.SITES_DIR / site['name']),
+                             'addresses': [caddy_address(host, site['port'], site['tls']) for host in site['hosts']]
+                             or [caddy_address('', site['port'], site['tls'])],
+                             'cert': str(CADDY_SITES_DIR / site['name'] / 'cert.pem'),
+                             'key': str(CADDY_SITES_DIR / site['name'] / 'key.pem')} for site in sites])
     changed = vpnrouter.render(vpnrouter._jinja_env(), caddy_ctx, 'Caddyfile.j2', CADDYFILE, 0o640)
     os.chown(CADDYFILE, 0, group)
     if not unit_is_active(CADDY_UNIT):
@@ -705,6 +799,71 @@ def manage_caddy(cfg, ctx):
         run(['systemctl', 'reload', CADDY_UNIT], check=False)
 
 
+def install_packages(feature):
+    """Start the installation of the packages of a feature by INSTALL_UNIT, which runs setup again, and say so."""
+    unit = INSTALL_UNIT.format(feature)
+    run(['systemctl', 'start', '--no-block', unit], check=False)
+    warn(f'the packages of {feature} are installed by {unit}, which runs setup again')
+
+
+def manage_webdav(ctx):
+    """Run rclone's WebDAV server of the sites' folders while WebDAV is ready, and stop it when not; rclone is installed
+    when it is missing."""
+    if not vpnrouter.webdav_ready(ctx):
+        if unit_is_active(WEBDAV_UNIT):
+            run(['systemctl', 'disable', '--now', WEBDAV_UNIT], check=False)
+        return
+    if shutil.which('rclone') is None:
+        install_packages('webdav')
+        return
+    vpnrouter_sites.ensure_folders([])
+    run(['systemctl', 'enable', '--now', WEBDAV_UNIT], check=False)
+
+
+def manage_dns(cfg, ctx):
+    """Run PowerDNS, the primary name server of the domains of vpnrouter_dns, on the addresses of dns.listen while DNS
+    is enabled, and stop it when not; its packages are installed when they are missing.
+
+    The settings, vpnrouter_dns.PDNS_CONF, are written before the packages are installed, so the server their
+    installation starts answers on those addresses only, beside systemd-resolved's stub on 127.0.0.53. The domains
+    with site records get the host names of the enabled sites, and keep those they have while the sites cannot be read.
+    """
+    if not vpnrouter.dns_ready(ctx):
+        if unit_is_active(vpnrouter_dns.UNIT):
+            run(['systemctl', 'disable', '--now', vpnrouter_dns.UNIT], check=False)
+        vpnrouter.remove(vpnrouter_dns.PDNS_CONF)
+        if vpnrouter_dns.DATABASE_SECRET.is_file():
+            try:
+                vpnrouter_dns.apply(cfg, [])
+            except vpnrouter_dns.DatabaseError as exc:
+                warn(str(exc))
+        return
+    addresses = {'internal': [ctx['int_addr']], 'external': ctx['local_addr_list'],
+                 'both': [ctx['int_addr'], *ctx['local_addr_list']]}[ctx['dns_listen']]
+    addresses = [address for address in addresses if address]
+    if not addresses:
+        warn(f'the name server does not run: the interfaces of dns.listen {ctx["dns_listen"]} have no address')
+        return
+    try:
+        vpnrouter_auth.provision_database(vpnrouter_dns.DATABASE, vpnrouter_dns.DATABASE_SECRET)
+        vpnrouter_dns.PDNS_CONF.parent.mkdir(mode=0o755, parents=True, exist_ok=True)
+        changed = write_if_changed(vpnrouter_dns.PDNS_CONF, vpnrouter_dns.config_text(addresses), 0o640)
+        if not vpnrouter_dns.PDNS_SERVER.exists() or not vpnrouter_dns.PDNS_SCHEMA.exists():
+            install_packages('dns')
+            return
+        os.chown(vpnrouter_dns.PDNS_CONF, 0, grp.getgrnam(vpnrouter_dns.GROUP).gr_gid)
+        vpnrouter_dns.provision()
+        if ctx['sites'] is not None:
+            vpnrouter_dns.apply(cfg, [host for site in ctx['sites'] for host in site['hosts']])
+    except (OSError, KeyError, vpnrouter_dns.DatabaseError) as exc:
+        warn(f'the name server cannot be set up: {exc}')
+        return
+    if not unit_is_active(vpnrouter_dns.UNIT):
+        run(['systemctl', 'enable', '--now', vpnrouter_dns.UNIT], check=False)
+    elif changed:
+        run(['systemctl', 'restart', vpnrouter_dns.UNIT], check=False)
+
+
 def manage_metrics(ctx):
     """Run the metrics service while metrics are enabled, and stop it when not.
 
@@ -795,6 +954,7 @@ def refresh_web(cfg, ctx):
             'internal_address': ctx['int_addr'],
             'internal_gateway': ctx['int_gateway_ip'],
             'local_cidrs': ctx['local_cidr_list'],
+            'client_dns': ctx['p2s_resolver_addrs'] if vpnrouter.RESOLVER_CONF.exists() else [],
             'site_to_site': [{
                 'name': connection['name'],
                 'local_identity': connection['local_id'],
@@ -863,6 +1023,16 @@ def main():
         ctx, more = vpnrouter.configure(cfg, public_ip=address)
         changed |= more
 
+    # The enabled sites while sites are on, None while they cannot be read.
+    ctx['sites'] = []
+    if cfg['sites']['enabled']:
+        progress('running', 'web sites')
+        try:
+            ctx['sites'] = vpnrouter_sites.served()
+        except vpnrouter_sites.DatabaseError as exc:
+            warn(str(exc))
+            ctx['sites'] = None
+
     progress('running', 'WireGuard keys')
     setup_wireguard(ctx)
 
@@ -900,12 +1070,18 @@ def main():
     manage_openvpn(ctx, changed)
     progress('running', 'HTTPS proxy')
     manage_caddy(cfg, ctx)
+    progress('running', 'WebDAV')
+    manage_webdav(ctx)
+    progress('running', 'name server')
+    manage_dns(cfg, ctx)
     progress('running', 'PKI timer')
     run(['systemctl', 'enable', '--now', PKI_TIMER], check=False)
 
     if 'resolved' in changed:
         progress('running', 'resolver')
         run(['systemctl', 'restart', 'systemd-resolved'], check=False)
+    progress('running', 'resolver of the remote access clients')
+    manage_resolver(changed)
 
     progress('running', 'platform module')
     run_platform_setup(cfg, ctx)

debian-package/src/usr/lib/vpn-router/vpnrouter.py

@@ -31,13 +31,23 @@ from vpnrouter_net import DEFAULT_LISTEN, LISTEN_CHOICES, LOOPBACK, ConfigError,
 
 CONFIG_FILE  = pathlib.Path('/etc/vpn-router/vpn-router.json')
 CONFIG_LOCK  = pathlib.Path('/run/vpn-router/config.lock')
+#: What setup resolved and runs, for the web service (setup's refresh_web).
+WEB_STATE    = pathlib.Path('/run/vpn-router/web.json')
 TEMPLATE_DIR = pathlib.Path('/usr/share/vpn-router/templates')
 
 SWANCTL_CONF_D = pathlib.Path('/etc/swanctl/conf.d')
 SITE_TO_SITE   = SWANCTL_CONF_D / 'site-to-site.conf'
 ROAD_WARRIOR   = SWANCTL_CONF_D / 'road-warrior.conf'
+#: The drop-in of systemd-resolved that earlier versions wrote for the remote access clients; removed when found.
 P2S_FORWARDER  = pathlib.Path('/etc/systemd/resolved.conf.d/p2s-forwarder.conf')
+#: The configuration of dnsmasq, the resolver of the remote access clients (vpn-router-resolver.service).
+RESOLVER_CONF  = pathlib.Path('/etc/vpn-router/dnsmasq.conf')
 WG_CONF        = pathlib.Path('/etc/wireguard/wg0.conf')
+#: The router's WireGuard public key, which setup writes with its private key.
+WG_PUBLIC_KEY  = pathlib.Path('/etc/wireguard/wg0.pub')
+#: The lines around the [Peer] sections of the users' WireGuard peers in WG_CONF, which setup writes from the directory.
+WG_PEERS_BEGIN = "# BEGIN WireGuard peers of the users of the router's directory"
+WG_PEERS_END   = "# END WireGuard peers of the users of the router's directory"
 OPENVPN_CONF   = pathlib.Path('/etc/openvpn/server/vpn-router.conf')
 OPENVPN_LDAP   = pathlib.Path('/etc/openvpn/server/vpn-router-ldap.conf')
 
@@ -48,14 +58,18 @@ SCHEMA = {
     'wan':        {'local_fqdn': ''},
     'local':      {'cidrs': [], 'int_addr': '', 'int_gateway_ip': ''},
     'site_to_site': {},
-    'p2s':        {'enabled': False, 'address_pool': ''},
+    'p2s':        {'enabled': False, 'address_pool': '', 'dns_listen': 'internal', 'dns_domains': []},
     'wireguard':  {'enabled': False, 'address': '', 'listen_port': 51820},
     'openvpn':    {'enabled': False, 'address_pool': '', 'port': 1194, 'protocol': 'udp'},
     'docker':     {'mode': 'auto', 'exposed_ports': []},
     'web':        {'enabled': True, 'listen': DEFAULT_LISTEN, 'port': 7081, 'database': '', 'trusted_proxies': [],
-                   'status_content': 'basic', 'shell': False, 'shell_idle_minutes': 15},
+                   'status_content': 'basic', 'shell': False, 'shell_idle_minutes': 15, 'shell_auth_timeout': 15,
+                   'log_files': []},
     'ssh':        {'ldap_login': False},
     'https':      {'enabled': True, 'email': '', 'web_port': 7444, 'manager_port': 7443, 'caddy_source': 'ubuntu'},
+    'oidc':       {'enabled': False},
+    'sites':      {'enabled': False, 'upload_max_mb': 512, 'webdav': False, 'webdav_port': 7445},
+    'dns':        {'enabled': False, 'nameserver': '', 'addresses': [], 'listen': 'external', 'ttl': 300},
     'pki':        {'root_name': 'VPN Router Root CA', 'root_days': 7300, 'ca_days': 3650, 'key': 'rsa-4096',
                    'crl_days': 7, 'root_crl_days': 180, 'publish': ['http'], 'p2s_name': 'VPN Router P2S CA',
                    's2s_name': 'VPN Router Site-to-Site CA', 'issuing_cas': {}, 'templates': {},
@@ -120,6 +134,33 @@ ACME_HTTP_PORT = 80
 #: The default port of HTTPS, where Caddy publishes the CA files when pki.publish has https-default.
 HTTPS_DEFAULT_PORT = 443
 
+#: The most files web.log_files lists.
+LOG_FILES_MAX = 32
+
+#: The port rclone serves WebDAV on, on the loopback address, behind Caddy.
+WEBDAV_LOOPBACK_PORT = 7446
+
+#: The largest sites.upload_max_mb, 10 GiB.
+UPLOAD_MAX_MB = 10240
+
+#: The shortest and the longest dns.ttl, in seconds.
+DNS_TTL_RANGE = (60, 86400)
+
+#: A DNS name without a wildcard, in lowercase, of dns.nameserver and the domains of the name server.
+ZONE_NAME = re.compile(r'^[a-z0-9]([a-z0-9-]{0,61}[a-z0-9])?(\.[a-z0-9]([a-z0-9-]{0,61}[a-z0-9])?)+$')
+
+#: A domain of p2s.dns_domains, one label or more, and the most domains.
+DNS_DOMAIN = re.compile(r'^[a-z0-9]([a-z0-9-]{0,61}[a-z0-9])?(\.[a-z0-9]([a-z0-9-]{0,61}[a-z0-9])?)*$')
+DNS_DOMAINS_MAX = 16
+
+#: The ports of the bootstrap services: the Router Manager's and the router's.
+BOOTSTRAP_PORTS = (17080, 17081)
+
+#: The Router Manager, vpn-router-manager, when it is installed, its settings and its port when they set none.
+MANAGER        = pathlib.Path('/usr/lib/vpn-router-manager/manager')
+MANAGER_CONFIG = pathlib.Path('/etc/vpn-router-manager/manager.json')
+MANAGER_PORT   = 7080
+
 #: Where vpn-router-setup installs Caddy from, https.caddy_source: the Ubuntu archive or Caddy's own repository.
 CADDY_SOURCES = ('ubuntu', 'upstream')
 
@@ -196,7 +237,7 @@ CA_NAME_MAX = 64
 #: What / and /status of the web service show, web.status_content, from the least to the most.
 STATUS_CONTENTS = ('basic', 'standard', 'full')
 
-#: The longest web.shell_idle_minutes, a day.
+#: The longest web.shell_idle_minutes and web.shell_auth_timeout, a day.
 SHELL_IDLE_MAX = 1440
 
 DOCKER_MODES = ('auto', 'on', 'off')
@@ -453,10 +494,16 @@ def validate(cfg):
     wg_address = _get(cfg, 'wireguard', 'address')
     if wg_address:
         try:
-            ipaddress.ip_interface(wg_address)
+            interface = ipaddress.ip_interface(wg_address)
         except ValueError:
             raise ConfigError(
                 f'wireguard.address: {wg_address!r} is not an address with prefix')
+        # The router's own address on wg0, from which the peers' addresses of the same network are told apart.
+        network = interface.network
+        if network.num_addresses > 2 and interface.ip in (network.network_address, network.broadcast_address):
+            raise ConfigError(
+                f'wireguard.address: {wg_address} is the network or broadcast address of {network}; give the '
+                f'router\'s own address in it, such as {next(network.hosts())}/{network.prefixlen}')
 
     port = _get(cfg, 'wireguard', 'listen_port')
     if not 1 <= port <= 65535:
@@ -488,6 +535,9 @@ def validate(cfg):
     shell_idle = _get(cfg, 'web', 'shell_idle_minutes')
     if not 1 <= shell_idle <= SHELL_IDLE_MAX:
         raise ConfigError(f'web.shell_idle_minutes: {shell_idle} is not between 1 and {SHELL_IDLE_MAX}')
+    shell_auth = _get(cfg, 'web', 'shell_auth_timeout')
+    if not 0 <= shell_auth <= SHELL_IDLE_MAX:
+        raise ConfigError(f'web.shell_auth_timeout: {shell_auth} is not between 0 and {SHELL_IDLE_MAX}')
 
     https_ports = []
     for option in ('web_port', 'manager_port'):
@@ -503,10 +553,58 @@ def validate(cfg):
     for item in _get_list(cfg, 'web', 'trusted_proxies'):
         _check_address(item, 'web.trusted_proxies')
 
+    log_files = _get_list(cfg, 'web', 'log_files')
+    if len(log_files) > LOG_FILES_MAX:
+        raise ConfigError(f'web.log_files: at most {LOG_FILES_MAX} files')
+    for item in log_files:
+        if not item.startswith('/') or '/../' in f'{item}/':
+            raise ConfigError(f'web.log_files: {item!r} is not an absolute path')
+
     caddy_source = _get(cfg, 'https', 'caddy_source')
     if caddy_source not in CADDY_SOURCES:
         raise ConfigError(f'https.caddy_source: {caddy_source!r} is not one of {", ".join(CADDY_SOURCES)}')
 
+    if _get(cfg, 'oidc', 'enabled') and not (_get(cfg, 'web', 'enabled') and _get(cfg, 'https', 'enabled')
+                                             and _get(cfg, 'wan', 'local_fqdn')):
+        raise ConfigError('oidc.enabled: the OpenID Provider is the web service served by Caddy at '
+                          'https://<wan.local_fqdn>:<https.web_port>, which needs web.enabled, https.enabled and '
+                          'wan.local_fqdn')
+
+    upload_max = _get(cfg, 'sites', 'upload_max_mb')
+    if not 1 <= upload_max <= UPLOAD_MAX_MB:
+        raise ConfigError(f'sites.upload_max_mb: {upload_max} is not between 1 and {UPLOAD_MAX_MB}')
+    if _get(cfg, 'sites', 'webdav') and not (_get(cfg, 'https', 'enabled') and _get(cfg, 'wan', 'local_fqdn')):
+        raise ConfigError('sites.webdav: WebDAV is served by Caddy at https://<wan.local_fqdn>:<sites.webdav_port>, '
+                          'which needs https.enabled and wan.local_fqdn')
+
+    dns = cfg['dns']
+    if dns['enabled']:
+        if not ZONE_NAME.match(dns['nameserver'].strip()):
+            raise ConfigError(f'dns.nameserver: {dns["nameserver"]!r} is not a DNS name in lowercase')
+        if not _get_list(cfg, 'dns', 'addresses'):
+            raise ConfigError('dns.enabled needs dns.addresses, the public addresses of the name server and the sites')
+    for item in _get_list(cfg, 'dns', 'addresses'):
+        _check_address(item, 'dns.addresses')
+    if dns['listen'] not in LISTEN_CHOICES:
+        raise ConfigError(f'dns.listen: {dns["listen"]!r} is not one of {", ".join(LISTEN_CHOICES)}')
+    if not DNS_TTL_RANGE[0] <= dns['ttl'] <= DNS_TTL_RANGE[1]:
+        raise ConfigError(f'dns.ttl: {dns["ttl"]} is not between {DNS_TTL_RANGE[0]} and {DNS_TTL_RANGE[1]} seconds')
+    dns_domains = _get_list(cfg, 'p2s', 'dns_domains')
+    if len(dns_domains) > DNS_DOMAINS_MAX or len(set(dns_domains)) != len(dns_domains):
+        raise ConfigError(f'p2s.dns_domains: at most {DNS_DOMAINS_MAX} different domains')
+    for item in dns_domains:
+        if not DNS_DOMAIN.match(item):
+            raise ConfigError(f'p2s.dns_domains: {item!r} is not a DNS name in lowercase')
+    resolver_listen = _get(cfg, 'p2s', 'dns_listen')
+    if resolver_listen not in LISTEN_CHOICES:
+        raise ConfigError(f'p2s.dns_listen: {resolver_listen!r} is not one of {", ".join(LISTEN_CHOICES)}')
+    sides = {'internal': {'internal'}, 'external': {'external'}, 'both': {'internal', 'external'}}
+    remote_access = any(_get(cfg, system, 'enabled') for system in ('p2s', 'openvpn', 'wireguard'))
+    if dns['enabled'] and remote_access and sides[dns['listen']] & sides[resolver_listen]:
+        raise ConfigError(f'dns.listen: port 53 of the {" and ".join(sorted(sides[dns["listen"]] & sides[resolver_listen]))} '
+                          f'addresses is the resolver of the remote access clients (p2s.dns_listen {resolver_listen}) '
+                          'while p2s.enabled, openvpn.enabled or wireguard.enabled is true')
+
     for option in ('root_name', 'p2s_name', 's2s_name'):
         value = _get(cfg, 'pki', option)
         if not value or len(value) > CA_NAME_MAX or not value.isprintable():
@@ -597,13 +695,13 @@ def validate(cfg):
         if _get(cfg, 'openvpn', 'protocol') == 'tcp' and _get(cfg, 'openvpn', 'port') == HTTPS_DEFAULT_PORT:
             raise ConfigError(f'pki.publish: https-default takes port {HTTPS_DEFAULT_PORT}, the port of openvpn.port')
         taken[HTTPS_DEFAULT_PORT] = 'pki.publish https-default'
-    for option in ('port', 'https_port'):
-        port = _get(cfg, 'metrics', option)
+    for section_name, option in (('metrics', 'port'), ('metrics', 'https_port'), ('sites', 'webdav_port')):
+        port = _get(cfg, section_name, option)
         if isinstance(port, bool) or not isinstance(port, int) or not 1 <= port <= 65535:
-            raise ConfigError(f'metrics.{option}: {port!r} is not a valid port')
+            raise ConfigError(f'{section_name}.{option}: {port!r} is not a valid port')
         if port in taken:
-            raise ConfigError(f'metrics.{option}: {port} is the port of {taken[port]}')
-        taken[port] = f'metrics.{option}'
+            raise ConfigError(f'{section_name}.{option}: {port} is the port of {taken[port]}')
+        taken[port] = f'{section_name}.{option}'
 
     metrics_listen = _get(cfg, 'metrics', 'listen')
     if metrics_listen not in LISTEN_CHOICES:
@@ -732,6 +830,21 @@ def pki_base_urls(cfg):
     return [bases[item] for item in _get_list(cfg, 'pki', 'publish') if item in bases] if fqdn else []
 
 
+def manager_port():
+    """The port of the Router Manager: port in its settings, or MANAGER_PORT when it is not set or not a port."""
+    try:
+        port = json.loads(MANAGER_CONFIG.read_text(encoding='utf-8')).get('port')
+    except (OSError, ValueError, AttributeError):
+        return MANAGER_PORT
+    return port if isinstance(port, int) and not isinstance(port, bool) and 1 <= port <= 65535 else MANAGER_PORT
+
+
+def oidc_issuer(cfg):
+    """The issuer of the OpenID Provider: the web service's HTTPS site, without the port when it is HTTPS_DEFAULT_PORT."""
+    port = _get(cfg, 'https', 'web_port')
+    return f'https://{_get(cfg, "wan", "local_fqdn")}' + ('' if port == HTTPS_DEFAULT_PORT else f':{port}')
+
+
 def resolve_psk(connection, name):
     """Return the pre-shared key of the site_to_site connection: psk_file wins, else psk; '' when none is configured."""
     psk_file = connection['psk_file'].strip()
@@ -840,6 +953,10 @@ def build_context(cfg, public_ip=None):
     openvpn_pool = _get(cfg, 'openvpn', 'address_pool')
     openvpn_network = ipaddress.ip_network(openvpn_pool) if openvpn_pool else None
     identities = {'fqdn': local_fqdn, 'public_ip': public_ip or '', 'internal_ip': int_addr}
+    # The addresses the remote access clients' resolver answers on, which p2s.dns_listen chooses.
+    resolver_addrs = [address for address in {'internal': [int_addr], 'external': local_addrs,
+                                               'both': [int_addr, *local_addrs]}[_get(cfg, 'p2s', 'dns_listen')]
+                      if address]
 
     connections = []
     for name, connection in cfg['site_to_site'].items():
@@ -883,10 +1000,16 @@ def build_context(cfg, public_ip=None):
         'p2s_enabled':     _get(cfg, 'p2s', 'enabled'),
         'p2s_address_pool': _get(cfg, 'p2s', 'address_pool'),
         'public_ip':       public_ip or '',
-        'p2s_dns':         _join(local_addrs, _split_list(extras['EXTRA_P2S_DNS'])),
+        'p2s_resolver_addrs': resolver_addrs,
+        'p2s_dns_domains': _get_list(cfg, 'p2s', 'dns_domains'),
+        'p2s_dns':         _join(resolver_addrs, _split_list(extras['EXTRA_P2S_DNS'])),
         'wg_enabled':      _get(cfg, 'wireguard', 'enabled'),
         'wg_address':      _get(cfg, 'wireguard', 'address'),
+        'wg_network':      str(ipaddress.ip_interface(_get(cfg, 'wireguard', 'address')).network)
+                           if _get(cfg, 'wireguard', 'address') else '',
         'wg_listen_port':  _get(cfg, 'wireguard', 'listen_port'),
+        'wg_peers_begin':  WG_PEERS_BEGIN,
+        'wg_peers_end':    WG_PEERS_END,
         'openvpn_enabled': _get(cfg, 'openvpn', 'enabled'),
         'openvpn_pool':    openvpn_pool,
         'openvpn_network': str(openvpn_network.network_address) if openvpn_network else '',
@@ -899,7 +1022,7 @@ def build_context(cfg, public_ip=None):
         'openvpn_ldap_conf': str(OPENVPN_LDAP),
         'openvpn_status':  vpnrouter_status.OPENVPN_STATUS,
         'openvpn_status_seconds': vpnrouter_status.OPENVPN_STATUS_SECONDS,
-        'p2s_dns_list':    _split_list(_join(local_addrs, _split_list(extras['EXTRA_P2S_DNS']))),
+        'p2s_dns_list':    _split_list(_join(resolver_addrs, _split_list(extras['EXTRA_P2S_DNS']))),
         'openvpn_ca':      str(vpnrouter_pki.OPENVPN_CA),
         'openvpn_crl':     str(vpnrouter_pki.OPENVPN_CRL),
         'server_cert':     str(vpnrouter_pki.VPN_SERVER_CERT),
@@ -919,6 +1042,11 @@ def build_context(cfg, public_ip=None):
         'metrics_port':    _get(cfg, 'metrics', 'port'),
         'metrics_https_port': _get(cfg, 'metrics', 'https_port'),
         'metrics_service_account': _get(cfg, 'metrics', 'service_account'),
+        'sites_enabled':   _get(cfg, 'sites', 'enabled'),
+        'webdav_enabled':  _get(cfg, 'sites', 'webdav'),
+        'webdav_port':     _get(cfg, 'sites', 'webdav_port'),
+        'dns_enabled':     _get(cfg, 'dns', 'enabled'),
+        'dns_listen':      _get(cfg, 'dns', 'listen'),
         'loopback':        LOOPBACK,
     }
 
@@ -935,7 +1063,7 @@ def routing_ready(ctx):
 
 
 def p2s_ready(ctx):
-    """Road-warrior access needs its settings and the router's VPN server certificate, which the P2S CA issues."""
+    """IKEv2 access needs its settings and the router's VPN server certificate, which the P2S CA issues."""
     return bool(ctx['p2s_enabled'] and ctx['p2s_address_pool'] and ctx['local_fqdn'] and ctx['server_certificate'])
 
 
@@ -958,6 +1086,16 @@ def metrics_ready(ctx):
     return bool(ctx['metrics_enabled'])
 
 
+def webdav_ready(ctx):
+    """WebDAV of the sites' folders is served by Caddy, on the router's own name, while it is on and HTTPS is ready."""
+    return bool(ctx['webdav_enabled'] and https_ready(ctx))
+
+
+def dns_ready(ctx):
+    """The name server answers for its domains while dns.enabled is true."""
+    return bool(ctx['dns_enabled'])
+
+
 def _jinja_env():
     return jinja2.Environment(
         loader=jinja2.FileSystemLoader(str(TEMPLATE_DIR)),
@@ -981,27 +1119,38 @@ def render(env, ctx, template_name, dest, mode):
 
 
 def existing_peers(path):
-    """Return the [Peer] sections of an existing WireGuard config.
+    """The block of the users' peers and the [Peer] sections added by hand of an existing WireGuard config, each ''
+    without one.
 
-    Peers are added by the operator by hand, so re-rendering the [Interface]
-    section must not discard them.
+    The block lies between WG_PEERS_BEGIN and WG_PEERS_END; the [Peer] sections outside it are the operator's, which
+    re-rendering the file keeps.
     """
     path = pathlib.Path(path)
     if not path.is_file():
-        return ''
-    lines = path.read_text(encoding='utf-8').splitlines(keepends=True)
+        return '', ''
+    text = path.read_text(encoding='utf-8')
+    block = ''
+    begin, end = text.find(WG_PEERS_BEGIN), text.find(WG_PEERS_END)
+    if begin != -1 and end > begin:
+        block = text[begin:end + len(WG_PEERS_END)]
+        text = text[:begin] + text[end + len(WG_PEERS_END):]
+    lines = text.splitlines(keepends=True)
     for index, line in enumerate(lines):
         if line.strip().lower() == '[peer]':
-            return ''.join(lines[index:])
-    return ''
+            return block, ''.join(lines[index:])
+    return block, ''
 
 
 def render_wg_conf(env, ctx, dest=WG_CONF, mode=0o600):
-    """Render wg0.conf, carrying any operator-defined peers across."""
-    content = env.get_template('wg0.conf.j2').render(ctx)
-    peers = existing_peers(dest)
-    if peers:
-        content = content.rstrip('\n') + '\n\n' + peers
+    """Render wg0.conf: the [Interface], the block of the users' peers of ctx's wg_peers, the block the file holds while
+    wg_peers is None, and the peers the operator added by hand, carried across."""
+    content = env.get_template('wg0.conf.j2').render(ctx).rstrip('\n') + '\n'
+    block, own = existing_peers(dest)
+    if ctx['wg_peers'] is not None:
+        block = env.get_template('wg0-peers.conf.j2').render(ctx).strip('\n') if ctx['wg_peers'] else ''
+    for part in (block, own):
+        if part.strip():
+            content += '\n' + part.strip('\n') + '\n'
 
     dest = pathlib.Path(dest)
     if dest.exists() and dest.read_text(encoding='utf-8') == content:
@@ -1040,7 +1189,7 @@ def configure(cfg=None, public_ip=None):
     """Render configuration files and provision PKI.
 
     Returns (ctx, changed) where changed is a set naming what needs reloading:
-    'swanctl', 'resolved', 'wireguard', 'openvpn'.
+    'swanctl', 'resolved', 'resolver', 'wireguard', 'openvpn'.
     """
     if cfg is None:
         cfg = load_config()
@@ -1070,6 +1219,13 @@ def configure(cfg=None, public_ip=None):
             notices = [f'the PKI is left as it is: the directory cannot be reached: {exc}']
     for notice in notices:
         warn(notice)
+    # The WireGuard peers of the users; None keeps those of wg0.conf while the directory cannot be reached.
+    ctx['wg_peers'] = None
+    if wg_ready(ctx):
+        try:
+            ctx['wg_peers'] = vpnrouter_ldap.wireguard_peers()
+        except ldap.LDAPError as exc:
+            warn(f'the WireGuard peers of the users are left as they are: the directory cannot be reached: {exc}')
     # What needs the router's own certificates.
     ctx['server_certificate'] = vpnrouter_pki.VPN_SERVER_CERT.is_file()
     for connection in ctx['connections']:
@@ -1090,11 +1246,15 @@ def configure(cfg=None, public_ip=None):
     elif remove(ROAD_WARRIOR):
         changed.add('swanctl')
 
-    if p2s_ready(ctx) or openvpn_ready(ctx):
-        if render(env, ctx, 'p2s-forwarder.conf.j2', P2S_FORWARDER, 0o644):
-            changed.add('resolved')
-    elif remove(P2S_FORWARDER):
+    # The resolver of the remote access clients is dnsmasq on the addresses of p2s.dns_listen; systemd-resolved keeps
+    # its loopback stub only, so its records of the router's own name stay on the router.
+    if remove(P2S_FORWARDER):
         changed.add('resolved')
+    if (p2s_ready(ctx) or openvpn_ready(ctx) or wg_ready(ctx)) and ctx['p2s_resolver_addrs']:
+        if render(env, ctx, 'dnsmasq.conf.j2', RESOLVER_CONF, 0o644):
+            changed.add('resolver')
+    elif remove(RESOLVER_CONF):
+        changed.add('resolver')
 
     if wg_ready(ctx):
         if render_wg_conf(env, ctx):

debian-package/src/usr/lib/vpn-router/vpnrouter_auth.py

@@ -10,6 +10,9 @@ Every failure of the database raises DatabaseError, the only database exception
 Refresh tokens are random strings kept in PostgreSQL as their SHA-256, in the database of
 web.database, by default the vpn-router database on this host that provision() creates on the
 web service's first run, with the password in DATABASE_SECRET. A refresh token is used once: refreshing replaces it.
+The same database holds the state of the OpenID Provider (vpnrouter_oidc), whose tables and procedures OIDC_SQL
+defines; the first connection of a process loads it. revoke() removes a user's refresh tokens and OpenID Provider
+codes, tokens and sessions.
 """
 
 import base64
@@ -26,6 +29,7 @@ import psycopg
 
 WEB_KEY = pathlib.Path('/etc/vpn-router/web.key')
 DATABASE_SECRET = pathlib.Path('/etc/vpn-router/database.secret')
+OIDC_SQL = pathlib.Path('/usr/share/vpn-router/sql/oidc.sql')
 
 #: The role and the database provision() creates when web.database is not set.
 DATABASE = 'vpn-router'
@@ -45,6 +49,9 @@ LEEWAY = 60
 
 SCHEMA = 'CREATE TABLE IF NOT EXISTS refresh_tokens (hash text PRIMARY KEY, name text NOT NULL, expires timestamptz NOT NULL)'
 
+#: Whether this process has loaded OIDC_SQL.
+_oidc_loaded = False
+
 
 class DatabaseError(Exception):
     """The database of the refresh tokens failed."""
@@ -120,21 +127,36 @@ def admin_token(seconds):
     return {'token': sign({'admin': True, 'iat': now, 'exp': now + seconds}, secret), 'expires': now + seconds}
 
 
+def local_connection(name, secret):
+    """The connection string of a database provision_database() created; its password, of URL-safe characters, is
+    written unquoted."""
+    password = secret.read_text(encoding='utf-8').strip()
+    return f'host=localhost dbname={name} user={name} password={password}'
+
+
 def connection_string(cfg):
-    """web.database, or the database provision() creates; its password, of URL-safe characters, is written unquoted."""
+    """web.database, or the database provision() creates."""
     configured = cfg['web']['database'].strip()
     if configured:
         return configured
-    password = DATABASE_SECRET.read_text(encoding='utf-8').strip()
-    return f'host=localhost dbname={DATABASE} user={DATABASE} password={password}'
+    return local_connection(DATABASE, DATABASE_SECRET)
 
 
 @contextlib.contextmanager
 def database(cfg):
-    """A connection to the database of the refresh tokens, with their table, closed at the end; DatabaseError on any failure."""
+    """A connection to the database of the refresh tokens, with their table and the OpenID Provider's, closed at the end;
+    DatabaseError on any failure."""
+    global _oidc_loaded
+    try:
+        oidc = None if _oidc_loaded else OIDC_SQL.read_text(encoding='utf-8')
+    except OSError as exc:
+        raise DatabaseError(f'{OIDC_SQL} cannot be read: {exc}') from exc
     try:
         with psycopg.connect(connection_string(cfg), autocommit=True) as connection:
             connection.execute(SCHEMA)
+            if oidc is not None:
+                connection.execute(oidc)
+                _oidc_loaded = True
             yield connection
     except psycopg.Error as exc:
         raise DatabaseError(f'the token database failed: {exc}') from exc
@@ -173,9 +195,10 @@ def take(cfg, token):
 
 
 def revoke(cfg, name):
-    """Remove all refresh tokens of the user."""
+    """Remove all refresh tokens of the user, and its codes, tokens and sessions of the OpenID Provider."""
     with database(cfg) as connection:
         connection.execute('DELETE FROM refresh_tokens WHERE name = %s', (name,))
+        connection.execute('CALL oidc_revoke(%s)', (name,))
 
 
 def psql(sql, name):
@@ -187,21 +210,33 @@ def psql(sql, name):
     return result.stdout.strip()
 
 
-def provision(cfg):
-    """Create the role, its password file and the database when web.database is not set and they are missing.
+def provision_database(name, secret):
+    """Create the role of the name, its password file secret and its database of the same name when they are missing.
 
     The password, of URL-safe characters, reaches psql on standard input, not on its command line.
     """
-    if cfg['web']['database'].strip():
-        return
-    if not psql("SELECT 1 FROM pg_roles WHERE rolname = :'v1'", DATABASE):
-        DATABASE_SECRET.unlink(missing_ok=True)
-        psql("CREATE ROLE :\"v1\" LOGIN", DATABASE)
-    if not DATABASE_SECRET.is_file():
+    if not psql("SELECT 1 FROM pg_roles WHERE rolname = :'v1'", name):
+        secret.unlink(missing_ok=True)
+        psql("CREATE ROLE :\"v1\" LOGIN", name)
+    if not secret.is_file():
         password = secrets.token_urlsafe(32)
-        psql(f"ALTER ROLE :\"v1\" PASSWORD '{password}'", DATABASE)
-        DATABASE_SECRET.touch(mode=0o600)
-        DATABASE_SECRET.chmod(0o600)
-        DATABASE_SECRET.write_text(password + '\n', encoding='utf-8')
-    if not psql("SELECT 1 FROM pg_database WHERE datname = :'v1'", DATABASE):
-        psql("CREATE DATABASE :\"v1\" OWNER :\"v1\"", DATABASE)
+        psql(f"ALTER ROLE :\"v1\" PASSWORD '{password}'", name)
+        secret.touch(mode=0o600)
+        secret.chmod(0o600)
+        secret.write_text(password + '\n', encoding='utf-8')
+    if not psql("SELECT 1 FROM pg_database WHERE datname = :'v1'", name):
+        psql("CREATE DATABASE :\"v1\" OWNER :\"v1\"", name)
+
+
+def reset_password(name, secret):
+    """Give the role of the name the password of its file secret, when both exist, as after a restore."""
+    if secret.is_file() and psql("SELECT 1 FROM pg_roles WHERE rolname = :'v1'", name):
+        password = secret.read_text(encoding='utf-8').strip()
+        psql(f"ALTER ROLE :\"v1\" PASSWORD '{password}'", name)
+
+
+def provision(cfg):
+    """Create the role, its password file and the database of the refresh tokens when web.database is not set and they
+    are missing."""
+    if not cfg['web']['database'].strip():
+        provision_database(DATABASE, DATABASE_SECRET)

debian-package/src/usr/lib/vpn-router/vpnrouter_backup.py

@@ -1,9 +1,10 @@
 """The backups of the router, for vpn-router-backup and the web service.
 
 A backup is a consistent copy of the state that setup cannot make again, staged in STAGING: the
-trees of TREES, the files of site_to_site psk_file outside them under files/, the directory as
-slapcat writes it (ldap/vpn-router.ldif), with backup.metrics the database as pg_dump writes it
-(postgresql/vpn-router.dump), and manifest.json. The trees and the directory are copied while
+trees of TREES, the folders of the web sites among them, the files of site_to_site psk_file outside them under files/,
+the directory as slapcat writes it (ldap/vpn-router.ldif), with backup.metrics the database as pg_dump writes it
+(postgresql/vpn-router.dump), the databases of the web sites and of the name server (DUMPS) once they exist, and
+manifest.json. The trees and the directory are copied while
 the configuration lock and the users lock are held, so the configuration, the PKI and the users
 match; pg_dump reads a snapshot of its own.
 
@@ -33,7 +34,9 @@ import time
 
 import vpnrouter
 import vpnrouter_auth
+import vpnrouter_dns
 import vpnrouter_ldap
+import vpnrouter_sites
 import vpnrouter_users
 
 STATE = pathlib.Path('/var/lib/vpn-router/backup.json')
@@ -49,7 +52,12 @@ UNIT = 'vpn-router-backup.service'
 TIMER = 'vpn-router-backup.timer'
 
 #: The state a backup copies: directories and files, each where it is on the system.
-TREES = ('/etc/vpn-router', '/etc/wireguard', '/etc/ufw', '/etc/default/ufw', '/etc/vpn-router-manager')
+TREES = ('/etc/vpn-router', '/etc/wireguard', '/etc/ufw', '/etc/default/ufw', '/etc/vpn-router-manager',
+         str(vpnrouter_sites.SITES_DIR))
+
+#: The databases a backup always dumps, each while it exists: the dump -> the database and its password file.
+DUMPS = {'postgresql/vpn-router-sites.dump': (vpnrouter_sites.DATABASE, vpnrouter_sites.DATABASE_SECRET),
+         'postgresql/vpn-router-dns.dump': (vpnrouter_dns.DATABASE, vpnrouter_dns.DATABASE_SECRET)}
 
 #: The name of a local archive: the host and the UTC time of the backup.
 ARCHIVE = re.compile(r'^vpn-router-(?P<host>[A-Za-z0-9][A-Za-z0-9.-]*)-(?P<stamp>\d{8}T\d{6}Z)\.tar\.zst$')
@@ -64,7 +72,8 @@ PERIODS = {'keep_hourly': '%Y-%m-%d %H', 'keep_daily': '%Y-%m-%d', 'keep_weekly'
            'keep_yearly': '%Y'}
 
 #: The units a restore stops while it replaces the directory and the database, and the ones it restarts after setup.
-RESTORE_STOPS = ('vpn-router-web.service', 'vpn-router-metrics.service', 'slapd.service')
+RESTORE_STOPS = ('vpn-router-web.service', 'vpn-router-metrics.service', 'vpn-router-webdav.service', 'pdns.service',
+                 'slapd.service')
 RESTORE_RESTARTS = ('wg-quick@wg0.service', 'openvpn-server@vpn-router.service', 'strongswan.service',
                     'vpn-router-manager.service')
 
@@ -223,14 +232,16 @@ def stage(cfg):
         (STAGING / LDIF).parent.mkdir()
         command(['slapcat', '-b', vpnrouter_ldap.BASE, '-l', str(STAGING / LDIF)])
     items = trees + [f'files{name}' for name in files] + [LDIF]
-    if cfg['backup']['metrics']:
-        (STAGING / DUMP).parent.mkdir()
-        prefix, database = database_args(cfg)
-        with open(STAGING / DUMP, 'wb') as dump:
+    dumps = {**({DUMP: database_args(cfg)} if cfg['backup']['metrics'] else {}),
+             **{item: (['runuser', '-u', 'postgres', '--'], [f'--dbname={name}'])
+                for item, (name, secret) in DUMPS.items() if secret.is_file()}}
+    for item, (prefix, database) in dumps.items():
+        (STAGING / item).parent.mkdir(exist_ok=True)
+        with open(STAGING / item, 'wb') as dump:
             result = subprocess.run([*prefix, 'pg_dump', '-Fc', *database], stdout=dump, stderr=subprocess.PIPE)
         if result.returncode != 0:
-            raise Failure(f'pg_dump failed: {result.stderr.decode(errors="replace").strip()}')
-        items.append(DUMP)
+            raise Failure(f'pg_dump for {item} failed: {result.stderr.decode(errors="replace").strip()}')
+        items.append(item)
     version = subprocess.run(['dpkg-query', '-W', '-f=${Version}', 'vpn-router'], capture_output=True, text=True)
     manifest = {'host': host(), 'time': now(), 'version': version.stdout.strip() or None,
                 'schedule': cfg['backup']['schedule'], 'items': items}
@@ -389,19 +400,22 @@ def restore(source, pbs, confirm):
             subprocess.run(['systemctl', 'start', 'slapd.service'], capture_output=True)
             restored = vpnrouter.load_config()
             if not restored['web']['database'].strip():
-                secret = vpnrouter_auth.DATABASE_SECRET
-                if secret.is_file() and vpnrouter_auth.psql("SELECT 1 FROM pg_roles WHERE rolname = :'v1'",
-                                                            vpnrouter_auth.DATABASE):
-                    password = secret.read_text(encoding='utf-8').strip()
-                    vpnrouter_auth.psql(f"ALTER ROLE :\"v1\" PASSWORD '{password}'", vpnrouter_auth.DATABASE)
+                vpnrouter_auth.reset_password(vpnrouter_auth.DATABASE, vpnrouter_auth.DATABASE_SECRET)
                 vpnrouter_auth.provision(restored)
-            if DUMP in manifest['items']:
-                prefix, database = database_args(restored)
-                with open(RESTORE_DIR / DUMP, 'rb') as dump:
+            dumps = {DUMP: database_args(restored)}
+            for item, (name, secret) in DUMPS.items():
+                if item in manifest['items']:
+                    vpnrouter_auth.reset_password(name, secret)
+                    vpnrouter_auth.provision_database(name, secret)
+                    dumps[item] = (['runuser', '-u', 'postgres', '--'], [f'--dbname={name}'])
+            for item, (prefix, database) in dumps.items():
+                if item not in manifest['items']:
+                    continue
+                with open(RESTORE_DIR / item, 'rb') as dump:
                     result = subprocess.run([*prefix, 'pg_restore', '--clean', '--if-exists', *database], stdin=dump,
                                             stdout=subprocess.DEVNULL, stderr=subprocess.PIPE)
                 if result.returncode != 0:
-                    raise Failure(f'pg_restore failed: {result.stderr.decode(errors="replace").strip()}')
+                    raise Failure(f'pg_restore of {item} failed: {result.stderr.decode(errors="replace").strip()}')
             subprocess.run(['systemctl', 'start', 'vpn-router-web.service'], capture_output=True)
             command(['systemctl', 'restart', 'vpn-router-setup.service'])
             for unit in RESTORE_RESTARTS:

debian-package/src/usr/lib/vpn-router/vpnrouter_dns.py

@@ -0,0 +1,401 @@
+"""The router's authoritative name server, PowerDNS with its gpgsql backend, for vpn-router-setup and the web service.
+
+The name server is the primary of its domains and answers on the addresses of the interfaces of dns.listen. The
+domains, their secondary name servers and the records an administrator added (manual records) are in the
+vpn-router-dns database, which provision() creates with its role and the password in DATABASE_SECRET, and fills with
+the schema of pdns-backend-pgsql, PDNS_SCHEMA; DNS_SQL defines the router's own tables and procedures, and the first
+connection of a process loads it.
+
+apply() writes every domain as a primary zone: its SOA with dns.nameserver, its NS, dns.nameserver and the name
+servers of its secondaries, the NS of the domains directly below it, A and AAAA records of dns.addresses for its apex,
+for those name servers inside it that are the router, and, when the domain has site records, for every host name of an
+enabled site whose closest domain it is, and the manual records, but those of a name and type the records before them
+have. A secondary's address is notified of every change (ALSO-NOTIFY) and may transfer the zone (ALLOW-AXFR-FROM); the
+serial of the SOA grows only when the records change.
+
+Every failure of the database raises DatabaseError; a request that cannot be done raises Failure.
+"""
+
+import contextlib
+import ipaddress
+import pathlib
+import re
+
+import psycopg
+from psycopg.rows import dict_row
+
+import vpnrouter
+import vpnrouter_auth
+
+DATABASE = 'vpn-router-dns'
+DATABASE_SECRET = pathlib.Path('/etc/vpn-router/dns-database.secret')
+DNS_SQL = pathlib.Path('/usr/share/vpn-router/sql/dns.sql')
+
+#: The schema of PowerDNS's gpgsql backend, which pdns-backend-pgsql installs.
+PDNS_SCHEMA = pathlib.Path('/usr/share/pdns-backend-pgsql/schema/schema.pgsql.sql')
+
+#: The settings of PowerDNS that vpn-router-setup writes, read after /etc/powerdns/pdns.conf; the server, its unit and
+#: the group it runs as.
+PDNS_CONF = pathlib.Path('/etc/powerdns/pdns.d/vpn-router.conf')
+PDNS_SERVER = pathlib.Path('/usr/sbin/pdns_server')
+UNIT = 'pdns.service'
+GROUP = 'pdns'
+
+#: The types of the manual records.
+TYPES = ('A', 'AAAA', 'CNAME', 'TXT', 'MX', 'SRV', 'CAA')
+
+#: The most domains, secondaries of a domain, and manual records of a domain.
+DOMAINS_MAX = 100
+SECONDARIES_MAX = 8
+MANUAL_MAX = 1000
+
+#: The refresh, retry and expire times of the SOA, in seconds.
+SOA_TIMES = '10800 3600 604800'
+
+#: A label of a record's name: letters, digits, hyphens and underscores, or * as the first label.
+LABEL = re.compile(r'^[a-z0-9_]([a-z0-9_-]{0,61}[a-z0-9_])?$')
+
+#: The content of an MX, SRV and CAA record, and a DNS name a record points to.
+MX = re.compile(r'^(\d{1,5}) (\S+)$')
+SRV = re.compile(r'^(\d{1,5}) (\d{1,5}) (\d{1,5}) (\S+)$')
+CAA = re.compile(r'^(0|128) (issue|issuewild|iodef) "[^"\\]*"$')
+TARGET = re.compile(r'^[a-z0-9_]([a-z0-9_-]{0,61}[a-z0-9_])?(\.[a-z0-9_]([a-z0-9_-]{0,61}[a-z0-9_])?)*$')
+
+#: The longest content of a TXT record, in characters.
+TXT_MAX = 2048
+
+#: Whether this process has loaded DNS_SQL.
+_loaded = False
+
+
+class DatabaseError(Exception):
+    """The database of the name server failed."""
+
+
+class Failure(Exception):
+    """A request that cannot be done; status is 2 invalid, 3 no such domain, secondary or record, 4 the domain
+    exists."""
+
+    def __init__(self, message, status=2):
+        super().__init__(message)
+        self.status = status
+
+
+def provision():
+    """Create the role, its password file and the database of the name server when they are missing, and PowerDNS's
+    tables in it; DatabaseError while pdns-backend-pgsql is not installed."""
+    vpnrouter_auth.provision_database(DATABASE, DATABASE_SECRET)
+    try:
+        with psycopg.connect(vpnrouter_auth.local_connection(DATABASE, DATABASE_SECRET), autocommit=True) as connection:
+            if connection.execute("SELECT to_regclass('public.domains')").fetchone()[0] is None:
+                connection.execute(PDNS_SCHEMA.read_text(encoding='utf-8'))
+    except OSError as exc:
+        raise DatabaseError(f'the schema of PowerDNS cannot be read: {exc}') from exc
+    except psycopg.Error as exc:
+        raise DatabaseError(f'the database of the name server failed: {exc}') from exc
+
+
+@contextlib.contextmanager
+def database():
+    """A connection to the database of the name server, with the router's tables and procedures, closed at the end;
+    DatabaseError on any failure, also before provision() made it."""
+    global _loaded
+    try:
+        schema = None if _loaded else DNS_SQL.read_text(encoding='utf-8')
+        target = vpnrouter_auth.local_connection(DATABASE, DATABASE_SECRET)
+    except OSError as exc:
+        raise DatabaseError(f'the database of the name server is not ready: {exc}') from exc
+    try:
+        with psycopg.connect(target, autocommit=True, row_factory=dict_row) as connection:
+            if schema is not None:
+                connection.execute(schema)
+                _loaded = True
+            yield connection
+    except psycopg.Error as exc:
+        raise DatabaseError(f'the database of the name server failed: {exc}') from exc
+
+
+def in_zone(zone, name):
+    return name == zone or name.endswith(f'.{zone}')
+
+
+def absolute(zone, name):
+    """The record name in the zone: @ or '' is the zone itself, a name ending in a dot is taken as it is, any other is
+    relative to the zone; Failure for a name outside the zone or not a DNS name."""
+    if not isinstance(name, str):
+        raise Failure('name must be a string')
+    name = name.strip().lower()
+    if name in ('', '@'):
+        return zone
+    full = name[:-1] if name.endswith('.') else f'{name}.{zone}'
+    labels = full.split('.')
+    if not in_zone(zone, full) or not all(LABEL.match(label) or (index == 0 and label == '*')
+                                          for index, label in enumerate(labels)):
+        raise Failure(f'{name!r} is not a name in {zone}')
+    return full
+
+
+def check_record(zone, record):
+    """The manual record {name, type, content, ttl?} with its name made absolute and its content checked; Failure when
+    it is not valid. A TXT content not in quotes is quoted."""
+    if not isinstance(record, dict):
+        raise Failure('a record is an object of name, type, content and ttl')
+    name = absolute(zone, record.get('name'))
+    kind = record.get('type')
+    content = record.get('content')
+    ttl = record.get('ttl')
+    if kind not in TYPES:
+        raise Failure(f'type must be one of {", ".join(TYPES)}')
+    if not isinstance(content, str) or not content.strip():
+        raise Failure('content must be a string')
+    if ttl is not None and (isinstance(ttl, bool) or not isinstance(ttl, int) or not 60 <= ttl <= 86400):
+        raise Failure('ttl must be 60 to 86400 seconds')
+    content = content.strip()
+    if kind in ('A', 'AAAA'):
+        try:
+            address = ipaddress.ip_address(content)
+        except ValueError:
+            address = None
+        if address is None or address.version != (4 if kind == 'A' else 6):
+            raise Failure(f'{content!r} is not an IPv{4 if kind == "A" else 6} address')
+        content = str(address)
+    elif kind == 'CNAME':
+        if name == zone:
+            raise Failure('the zone itself cannot have a CNAME record')
+        content = content.lower().rstrip('.')
+        if not TARGET.match(content):
+            raise Failure(f'{content!r} is not a DNS name')
+    elif kind == 'TXT':
+        if not (content.startswith('"') and content.endswith('"') and len(content) > 1):
+            content = '"' + content.replace('\\', '\\\\').replace('"', '\\"') + '"'
+        if len(content) > TXT_MAX or not content.isprintable():
+            raise Failure(f'the text must have at most {TXT_MAX} printable characters')
+    elif kind in ('MX', 'SRV'):
+        match = (MX if kind == 'MX' else SRV).match(content.lower())
+        if not match or any(int(value) > 65535 for value in match.groups()[:-1]) or \
+                not TARGET.match(match.groups()[-1].rstrip('.')):
+            raise Failure(f'{kind} content is ' + ('"<preference> <host>"' if kind == 'MX'
+                                                    else '"<priority> <weight> <port> <host>"'))
+        content = ' '.join([*match.groups()[:-1], match.groups()[-1].rstrip('.')])
+    elif not CAA.match(content):
+        raise Failure('CAA content is "<0 or 128> <issue, issuewild or iodef> \\"<value>\\""')
+    return {'name': name, 'type': kind, 'content': content, 'ttl': ttl}
+
+
+def closest(zones, name):
+    """The longest of the zones the name is in, None when it is in none."""
+    return max((zone for zone in zones if in_zone(zone, name)), key=len, default=None)
+
+
+def check_domain(name):
+    """The domain name in lowercase without a final dot; Failure when it is not a DNS name."""
+    if not isinstance(name, str) or not vpnrouter.ZONE_NAME.match(name.strip().lower().rstrip('.')):
+        raise Failure(f'{name!r} is not a domain name')
+    return name.strip().lower().rstrip('.')
+
+
+def check_ttl(ttl):
+    if ttl is not None and (isinstance(ttl, bool) or not isinstance(ttl, int) or
+                            not vpnrouter.DNS_TTL_RANGE[0] <= ttl <= vpnrouter.DNS_TTL_RANGE[1]):
+        raise Failure(f'ttl must be {vpnrouter.DNS_TTL_RANGE[0]} to {vpnrouter.DNS_TTL_RANGE[1]} seconds')
+    return ttl
+
+
+def domain(connection, name):
+    """The domain; Failure with status 3 when there is none."""
+    row = next((row for row in connection.execute('SELECT * FROM dns_domains_list()').fetchall()
+                if row['name'] == name), None)
+    if row is None:
+        raise Failure(f'no domain {name}', 3)
+    return row
+
+
+def listing():
+    """Every domain with its secondaries, its manual records and the records the name server answers for it."""
+    with database() as connection:
+        secondaries = connection.execute('SELECT * FROM dns_secondaries_list()').fetchall()
+        manual = connection.execute('SELECT * FROM dns_records_list()').fetchall()
+        return [{**row,
+                 'secondaries': [{key: item[key] for key in ('nameserver', 'address')}
+                                 for item in secondaries if item['domain'] == row['name']],
+                 'manual': [{key: item[key] for key in ('name', 'type', 'content', 'ttl')}
+                            for item in manual if item['domain'] == row['name']],
+                 'records': connection.execute('SELECT * FROM dns_served(%s)', (row['name'],)).fetchall()}
+                for row in connection.execute('SELECT * FROM dns_domains_list()').fetchall()]
+
+
+def domain_add(body):
+    """Add the domain {name, sites, ttl?}; the domain."""
+    if not isinstance(body, dict) or not isinstance(body.get('sites', False), bool):
+        raise Failure('a domain is an object of name, sites and ttl')
+    name, sites, ttl = check_domain(body.get('name')), body.get('sites', False), check_ttl(body.get('ttl'))
+    with database() as connection:
+        names = [row['name'] for row in connection.execute('SELECT * FROM dns_domains_list()').fetchall()]
+        if name in names:
+            raise Failure(f'the domain {name} exists', 4)
+        if len(names) >= DOMAINS_MAX:
+            raise Failure(f'the name server has {DOMAINS_MAX} domains')
+        connection.execute('CALL dns_domain_put(%s, %s, %s)', (name, sites, ttl))
+    return {'name': name, 'sites': sites, 'ttl': ttl}
+
+
+def domain_change(name, body):
+    """Change the sites and ttl of the domain; the domain."""
+    if not isinstance(body, dict) or not set(body) <= {'sites', 'ttl'} or \
+            not isinstance(body.get('sites', False), bool):
+        raise Failure('a change of a domain is an object of sites and ttl')
+    with database() as connection:
+        row = domain(connection, name)
+        sites, ttl = body.get('sites', row['sites']), check_ttl(body.get('ttl', row['ttl']))
+        connection.execute('CALL dns_domain_put(%s, %s, %s)', (name, sites, ttl))
+    return {'name': name, 'sites': sites, 'ttl': ttl}
+
+
+def domain_remove(name):
+    """Remove the domain with its secondaries and manual records."""
+    with database() as connection:
+        domain(connection, name)
+        connection.execute('CALL dns_domain_remove(%s)', (name,))
+    return {'name': name}
+
+
+def secondary_add(name, body):
+    """Add the secondary name server {nameserver, address} of the domain, or set its address; the secondary."""
+    if not isinstance(body, dict):
+        raise Failure('a secondary is an object of nameserver and address')
+    nameserver = body.get('nameserver')
+    if not isinstance(nameserver, str) or not vpnrouter.ZONE_NAME.match(nameserver.strip().lower().rstrip('.')):
+        raise Failure(f'{nameserver!r} is not a name server name')
+    nameserver = nameserver.strip().lower().rstrip('.')
+    try:
+        address = str(ipaddress.ip_address(str(body.get('address', '')).strip()))
+    except ValueError as exc:
+        raise Failure(f'{body.get("address")!r} is not an IP address') from exc
+    with database() as connection:
+        domain(connection, name)
+        others = [row for row in connection.execute('SELECT * FROM dns_secondaries_list()').fetchall()
+                  if row['domain'] == name and row['nameserver'] != nameserver]
+        if len(others) >= SECONDARIES_MAX:
+            raise Failure(f'the domain {name} has {SECONDARIES_MAX} secondaries')
+        connection.execute('CALL dns_secondary_put(%s, %s, %s)', (name, nameserver, address))
+    return {'domain': name, 'nameserver': nameserver, 'address': address}
+
+
+def secondary_remove(name, nameserver):
+    """Remove the secondary name server of the domain."""
+    with database() as connection:
+        domain(connection, name)
+        if not any(row['domain'] == name and row['nameserver'] == nameserver
+                   for row in connection.execute('SELECT * FROM dns_secondaries_list()').fetchall()):
+            raise Failure(f'no secondary {nameserver} of {name}', 3)
+        connection.execute('CALL dns_secondary_remove(%s, %s)', (name, nameserver))
+    return {'domain': name, 'nameserver': nameserver}
+
+
+def add(cfg, name, record):
+    """Add the manual record to the domain, or set the TTL of the same one; the record. A name in a domain below it
+    belongs to that domain."""
+    with database() as connection:
+        row = domain(connection, name)
+        record = check_record(name, record)
+        record['ttl'] = record['ttl'] or row['ttl'] or cfg['dns']['ttl']
+        zones = [item['name'] for item in connection.execute('SELECT * FROM dns_domains_list()').fetchall()]
+        owner = closest(zones, record['name'])
+        if owner != name:
+            raise Failure(f'{record["name"]} is in the domain {owner}')
+        records = [item for item in connection.execute('SELECT * FROM dns_records_list()').fetchall()
+                   if item['domain'] == name]
+        same = [item for item in records if (item['name'], item['type']) == (record['name'], record['type'])]
+        others = [item for item in records if item['name'] == record['name'] and item['type'] != record['type']]
+        if len(records) >= MANUAL_MAX and not same:
+            raise Failure(f'the domain {name} has {MANUAL_MAX} manual records')
+        if record['type'] == 'CNAME' and (others or [item for item in same if item['content'] != record['content']]):
+            raise Failure(f'{record["name"]} has other records; a CNAME record must be its only record')
+        if any(item['type'] == 'CNAME' for item in others):
+            raise Failure(f'{record["name"]} has a CNAME record, which must be its only record')
+        connection.execute('CALL dns_record_put(%s, %s, %s, %s, %s)',
+                           (name, record['name'], record['type'], record['content'], record['ttl']))
+    return record
+
+
+def remove(name, record_name, kind, content):
+    """Remove the manual records of the name and type in the domain, only the one of the content when it is given."""
+    full = absolute(name, record_name)
+    with database() as connection:
+        domain(connection, name)
+        found = [row for row in connection.execute('SELECT * FROM dns_records_list()').fetchall()
+                 if (row['domain'], row['name'], row['type']) == (name, full, kind)
+                 and content in (None, row['content'])]
+        if not found:
+            raise Failure(f'no {kind} record of {full}', 3)
+        connection.execute('CALL dns_record_remove(%s, %s, %s, %s)', (name, full, kind, content))
+    return {'name': full, 'type': kind, 'removed': len(found)}
+
+
+def records(cfg, row, zones, secondaries, hosts, manual_records):
+    """The records of the domain row besides its SOA, as (name, type, content, ttl): the NS of the domain and of the
+    domains directly below it, the A and AAAA records of dns.addresses for its apex, dns.nameserver when it is inside
+    and, with site records, each host name whose closest domain it is, the glue of the secondaries inside it, and its
+    manual records. secondaries maps a domain to its secondaries."""
+    dns = cfg['dns']
+    zone, nameserver, ttl = row['name'], dns['nameserver'].strip(), row['ttl'] or dns['ttl']
+    addresses = [ipaddress.ip_address(item.strip()) for item in dns['addresses'] if item.strip()]
+    children = [name for name in zones
+                if name != zone and closest([item for item in zones if item != name], name) == zone]
+    found = [(name, 'NS', server, ttl) for name in [zone, *children]
+             for server in [nameserver, *(item['nameserver'] for item in secondaries.get(name, []))]]
+    for name in dict.fromkeys([zone, *([nameserver] if in_zone(zone, nameserver) else []),
+                               *(host for host in hosts if row['sites'] and closest(zones, host) == zone)]):
+        found += [(name, 'A' if address.version == 4 else 'AAAA', str(address), ttl) for address in addresses]
+    for item in (item for name in [zone, *children] for item in secondaries.get(name, [])):
+        if in_zone(zone, item['nameserver']) and item['nameserver'] != nameserver:
+            address = ipaddress.ip_address(item['address'])
+            found.append((item['nameserver'], 'A' if address.version == 4 else 'AAAA', str(address), ttl))
+    taken = {(name, kind) for name, kind, _, _ in found}
+    found += [(item['name'], item['type'], item['content'], item['ttl']) for item in manual_records
+              if (item['name'], item['type']) not in taken]
+    return list(dict.fromkeys(found))
+
+
+def apply(cfg, hosts):
+    """Make the name server the primary of every domain with records(), and of none while dns.enabled is false."""
+    with database() as connection:
+        if not cfg['dns']['enabled']:
+            connection.execute('CALL dns_retain(%s::text[])', ([],))
+            return
+        dns = cfg['dns']
+        domains = connection.execute('SELECT * FROM dns_domains_list()').fetchall()
+        zones = [row['name'] for row in domains]
+        secondaries, manual = {}, {}
+        for item in connection.execute('SELECT * FROM dns_secondaries_list()').fetchall():
+            secondaries.setdefault(item['domain'], []).append(item)
+        for item in connection.execute('SELECT * FROM dns_records_list()').fetchall():
+            manual.setdefault(item['domain'], []).append(item)
+        for row in domains:
+            zone, ttl = row['name'], row['ttl'] or dns['ttl']
+            rows = records(cfg, row, zones, secondaries, hosts, manual.get(zone, []))
+            soa = f'{dns["nameserver"].strip()} hostmaster.{zone} {{serial}} {SOA_TIMES} {ttl}'
+            connection.execute('CALL dns_apply(%s, %s, %s, %s::text[], %s::text[], %s::text[], %s::integer[], '
+                               '%s::text[])',
+                               (zone, soa, ttl, [item[0] for item in rows], [item[1] for item in rows],
+                                [item[2] for item in rows], [item[3] for item in rows],
+                                [item['address'] for item in secondaries.get(zone, [])]))
+        connection.execute('CALL dns_retain(%s::text[])', (zones,))
+
+
+def config_text(addresses):
+    """The settings of PowerDNS: the gpgsql backend on the database of the name server, primary operation, and the
+    addresses it answers on."""
+    password = DATABASE_SECRET.read_text(encoding='utf-8').strip()
+    return '\n'.join([
+        '# Written by vpn-router-setup from /etc/vpn-router/vpn-router.json; edits are overwritten.',
+        'launch=gpgsql',
+        'gpgsql-host=localhost',
+        f'gpgsql-dbname={DATABASE}',
+        f'gpgsql-user={DATABASE}',
+        f'gpgsql-password={password}',
+        'primary=yes',
+        f'local-address={", ".join(addresses)}',
+        'local-port=53',
+        '',
+    ])

debian-package/src/usr/lib/vpn-router/vpnrouter_ldap.py

@@ -66,7 +66,12 @@ OVERLAYS = ('ppolicy', 'otp')
 #: authorization scopes, of which service marks a service account, displayName and
 #: description, the labels of a service account, and vpnRouterConsoleLogin and
 #: vpnRouterConsoleAccount, whether the user may use a console and the local account it runs as,
-#: without which it runs as the user's own posixAccount. vpnRouterAuthority is a CA of the PKI: its
+#: without which it runs as the user's own posixAccount, and vpnRouterWireGuardPeer, each a
+#: WireGuard peer of the user as "<public key> <IP>[,<IP>...]", and vpnRouterPasskey, each a
+#: passkey of the user as JSON (vpnrouter_passkeys). A service account with vpnRouterRedirectUri
+#: is a client of the OpenID Provider (vpnrouter_oidc): the URIs it is sent back to after a sign-in
+#: and, vpnRouterPostLogoutRedirectUri, after a sign-out, and vpnRouterAllowedGroup, the DNs of the
+#: groups whose members may sign in to it. vpnRouterAuthority is a CA of the PKI: its
 #: certificate and CRL (cACertificate and certificateRevocationList of RFC 4523), its key, the
 #: CSR it waits with for the offline root, the number of its last CRL, where the CRL came from,
 #: and when it was retired. vpnRouterCertificate is a certificate a CA issued, named by its
@@ -97,11 +102,22 @@ SCHEMA_ATTRIBUTE_TYPES = (
     "EQUALITY booleanMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.7 SINGLE-VALUE )",
     f"( {SCHEMA_OID}.1.14 NAME 'vpnRouterConsoleAccount' DESC 'VPN router: the local account the console of the user runs as' "
     f"{_STRING} )",
+    f"( {SCHEMA_OID}.1.15 NAME 'vpnRouterWireGuardPeer' DESC 'VPN router: a WireGuard peer of the user, its public key and IPs' "
+    "EQUALITY caseExactMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.15{1024} )",
+    f"( {SCHEMA_OID}.1.16 NAME 'vpnRouterPasskey' DESC 'VPN router: a passkey of the user, its credential as JSON' "
+    "EQUALITY caseExactMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.15{4096} )",
+    f"( {SCHEMA_OID}.1.17 NAME 'vpnRouterRedirectUri' DESC 'VPN router: a redirect URI of an OpenID Connect client' "
+    "EQUALITY caseExactMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.15{1024} )",
+    f"( {SCHEMA_OID}.1.18 NAME 'vpnRouterPostLogoutRedirectUri' DESC 'VPN router: a post-logout redirect URI of an "
+    "OpenID Connect client' EQUALITY caseExactMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.15{1024} )",
+    f"( {SCHEMA_OID}.1.19 NAME 'vpnRouterAllowedGroup' DESC 'VPN router: a group whose members may sign in to an "
+    "OpenID Connect client' EQUALITY distinguishedNameMatch SYNTAX 1.3.6.1.4.1.1466.115.121.1.12 )",
 )
 SCHEMA_OBJECT_CLASSES = (
     f"( {SCHEMA_OID}.2.1 NAME 'vpnRouterAccount' DESC 'VPN router: properties of a user or a Manager-only account' "
     "SUP top AUXILIARY MAY ( mail $ vpnRouterScope $ displayName $ description $ vpnRouterConsoleLogin $ "
-    "vpnRouterConsoleAccount ) )",
+    "vpnRouterConsoleAccount $ vpnRouterWireGuardPeer $ vpnRouterPasskey $ vpnRouterRedirectUri $ "
+    "vpnRouterPostLogoutRedirectUri $ vpnRouterAllowedGroup ) )",
     f"( {SCHEMA_OID}.2.2 NAME 'vpnRouterAuthority' DESC 'VPN router: a CA of the PKI' SUP top STRUCTURAL MUST cn "
     "MAY ( cACertificate $ certificateRevocationList $ vpnRouterPrivateKey $ vpnRouterCertificateRequest $ "
     "vpnRouterCRLNumber $ vpnRouterCRLSource $ vpnRouterRetired ) )",
@@ -116,6 +132,9 @@ TOTP_ALGORITHM = '1.2.840.113549.2.7'
 TOTP_PERIOD = 30
 TOTP_WINDOW = 1
 
+#: The value of pwdAccountLockedTime that disables a user until it is enabled again.
+DISABLED = '000001010000Z'
+
 #: The indexes of the database.
 INDEXES = ('objectClass eq', 'uid eq', 'uidNumber eq', 'vpnRouterConsoleLogin eq')
 
@@ -287,6 +306,23 @@ def _ensure_manager(connection):
         MANAGER_SECRET.write_text(password, encoding='utf-8')
 
 
+def wireguard_peers():
+    """The WireGuard peers of the users who are not disabled, read as root: [(user, public key, [IP, ...])], sorted."""
+    connection = root()
+    try:
+        found = connection.search_s(USERS, ldap.SCOPE_ONELEVEL,
+                                    f'(&(vpnRouterWireGuardPeer=*)(!(pwdAccountLockedTime={DISABLED})))',
+                                    ['uid', 'vpnRouterWireGuardPeer'])
+    finally:
+        connection.unbind_s()
+    peers = []
+    for _, attributes in found:
+        for value in attributes['vpnRouterWireGuardPeer']:
+            key, _, ips = value.decode().partition(' ')
+            peers.append((attributes['uid'][0].decode(), key, ips.split(',')))
+    return sorted(peers)
+
+
 def provision():
     """Create or bring up to date the modules, the package's schema, database, ACLs, password policy, entries and service account."""
     connection = root()

debian-package/src/usr/lib/vpn-router/vpnrouter_oidc.py

@@ -0,0 +1,584 @@
+"""The router's OpenID Provider, for the web service, with python3-oauthlib and python3-jwt.
+
+While oidc.enabled is true, the web service answers OpenID Connect at the issuer vpnrouter.oidc_issuer, its HTTPS site
+that Caddy serves; the web service answers it only on the loopback address, where Caddy passes the requests. The users
+of the router's directory sign in, with the password and the TOTP code or with a passkey (vpnrouter_passkeys), to its
+clients, the service accounts with redirect URIs (vpnrouter_users.client_settings): a client's ID is its name and its
+secret its password, sent with HTTP Basic authentication or in the body of the token request. A client with allowed
+groups admits only their members; a service account never signs in as a user.
+
+  GET  /.well-known/openid-configuration   the discovery document
+  GET  /oidc/jwks                         the public key the ID tokens are signed with
+  GET, POST /oidc/authorize               the authorization code flow, PKCE with S256 required; the sign-in page while
+                                          the browser has no session, or with prompt=login or an older one than max_age
+  POST /oidc/login                        the sign-in page's form: the name, the password and the code, or a passkey
+  POST /oidc/passkey                      begin a sign-in with a passkey: {"id", "options"}
+  POST /oidc/token                        exchange a code or a refresh token for tokens
+  GET, POST /oidc/userinfo                the claims of the user an access token was issued for
+  GET  /oidc/logout                       end the session, then go to a post-logout redirect URI of the client
+
+ID tokens are RS256 JWTs signed with KEY, an RSA key the web service makes on its first run on the router, named by
+the RFC 7638 thumbprint of its public key. sub is the entryUUID of the user's entry, so a user added again under the
+same name is another subject. The scopes: openid, required; profile, preferred_username and the names; email; groups,
+the names of the user's groups; their claims are in the ID token and the userinfo answer. A code is valid
+CODE_SECONDS, an access token and an ID token ACCESS_SECONDS, a refresh token REFRESH_SECONDS, used once. A session,
+the cookie COOKIE of the issuer's /oidc/ path, lasts SESSION_SECONDS. Codes, tokens and sessions are kept in the
+database of vpnrouter_auth as their SHA-256 (vpnrouter_auth.OIDC_SQL); vpnrouter_auth.revoke removes a user's. A
+client is registered by an administrator, so a user is not asked for consent.
+"""
+
+import base64
+import collections
+import contextlib
+import datetime
+import hashlib
+import http.cookies
+import json
+import pathlib
+import secrets
+import time
+import types
+import urllib.parse
+
+import jinja2
+import jwt
+import ldap
+from cryptography.hazmat.primitives import serialization
+from cryptography.hazmat.primitives.asymmetric import rsa
+from oauthlib.common import add_params_to_uri
+from oauthlib.oauth2 import AccessDeniedError, FatalClientError, InvalidRequestError, OAuth2Error
+from oauthlib.openid import RequestValidator, Server
+from oauthlib.openid.connect.core.exceptions import LoginRequired
+
+import vpnrouter
+import vpnrouter_auth
+import vpnrouter_ldap
+import vpnrouter_passkeys
+import vpnrouter_users
+
+KEY = pathlib.Path('/etc/vpn-router/oidc.key')
+KEY_BITS = 3072
+
+CODE_SECONDS = 60
+ACCESS_SECONDS = 300
+REFRESH_SECONDS = 8 * 3600
+SESSION_SECONDS = 8 * 3600
+
+COOKIE = 'vpn_router_oidc'
+
+#: The claims of each scope but openid, which gives sub.
+SCOPE_CLAIMS = {
+    'profile': ('preferred_username', 'name', 'given_name', 'family_name'),
+    'email': ('email',),
+    'groups': ('groups',),
+}
+SCOPES = ('openid', *SCOPE_CLAIMS)
+
+#: The authentication methods (RFC 8176) of a sign-in with a password, with a password and a TOTP code, and with a
+#: passkey, which verifies the user.
+PASSWORD_AMR = ['pwd']
+OTP_AMR = ['pwd', 'otp']
+PASSKEY_AMR = ['hwk', 'user']
+
+TEMPLATE = 'oidc-page.html.j2'
+
+#: The headers of the pages: no framing, and nothing loaded but from the page itself and the router.
+PAGE_HEADERS = [('Content-Security-Policy', "default-src 'none'; script-src 'unsafe-inline'; style-src 'unsafe-inline'; "
+                                            "connect-src 'self'; frame-ancestors 'none'")]
+
+#: The headers of oauthlib's answers that the web service sets itself.
+OWN_HEADERS = ('content-type', 'cache-control', 'content-length')
+
+#: A user's sign-in at the OpenID Provider: the user name, when, a datetime, and how (amr).
+Session = collections.namedtuple('Session', 'name auth_time amr')
+
+_pages = jinja2.Environment(loader=jinja2.FileSystemLoader(str(vpnrouter.TEMPLATE_DIR)), autoescape=True,
+                            undefined=jinja2.StrictUndefined)
+
+
+def ensure_key():
+    """Make the signing key when it is missing."""
+    if KEY.is_file() and KEY.stat().st_size:
+        return
+    key = rsa.generate_private_key(public_exponent=65537, key_size=KEY_BITS)
+    KEY.parent.mkdir(parents=True, exist_ok=True)
+    KEY.touch(mode=0o600)
+    KEY.chmod(0o600)
+    KEY.write_bytes(key.private_bytes(serialization.Encoding.PEM, serialization.PrivateFormat.PKCS8,
+                                      serialization.NoEncryption()))
+
+
+def private_key():
+    return serialization.load_pem_private_key(KEY.read_bytes(), None)
+
+
+def public_jwk(key):
+    """The JWK of the key's public key, its kid the RFC 7638 thumbprint."""
+    numbers = key.public_key().public_numbers()
+    jwk = {'e': numbers.e, 'kty': 'RSA', 'n': numbers.n}
+    jwk = {name: vpnrouter_auth.b64encode(value.to_bytes((value.bit_length() + 7) // 8, 'big')) if isinstance(value, int)
+           else value for name, value in jwk.items()}
+    thumbprint = hashlib.sha256(json.dumps(jwk, sort_keys=True, separators=(',', ':')).encode()).digest()
+    return {**jwk, 'kid': vpnrouter_auth.b64encode(thumbprint), 'use': 'sig', 'alg': 'RS256'}
+
+
+def sign(claims):
+    key = private_key()
+    return jwt.encode(claims, key, algorithm='RS256', headers={'kid': public_jwk(key)['kid']})
+
+
+def discovery(issuer):
+    """The discovery document of OpenID Connect Discovery 1.0."""
+    return {
+        'issuer': issuer,
+        'authorization_endpoint': f'{issuer}/oidc/authorize',
+        'token_endpoint': f'{issuer}/oidc/token',
+        'userinfo_endpoint': f'{issuer}/oidc/userinfo',
+        'jwks_uri': f'{issuer}/oidc/jwks',
+        'end_session_endpoint': f'{issuer}/oidc/logout',
+        'scopes_supported': list(SCOPES),
+        'response_types_supported': ['code'],
+        'response_modes_supported': ['query'],
+        'grant_types_supported': ['authorization_code', 'refresh_token'],
+        'subject_types_supported': ['public'],
+        'id_token_signing_alg_values_supported': ['RS256'],
+        'token_endpoint_auth_methods_supported': ['client_secret_basic', 'client_secret_post'],
+        'code_challenge_methods_supported': ['S256'],
+        'claims_supported': ['iss', 'sub', 'aud', 'exp', 'iat', 'auth_time', 'nonce', 'amr', 'at_hash',
+                             *(claim for claims in SCOPE_CLAIMS.values() for claim in claims)],
+    }
+
+
+@contextlib.contextmanager
+def directory():
+    """A connection to the router's directory as the user manager account, for reading."""
+    connection = vpnrouter_ldap.manager()
+    try:
+        yield connection
+    finally:
+        connection.unbind_s()
+
+
+def client_of(client_id):
+    """The client of the ID, a namespace of its vpnrouter_users.summary with client_id, when it is an enabled service
+    account with redirect URIs; else None."""
+    if not isinstance(client_id, str):
+        return None
+    with directory() as connection:
+        try:
+            user = vpnrouter_users.summary(vpnrouter_users.entry(connection, client_id))
+        except vpnrouter_users.Failure:
+            return None
+    if not user['service'] or not user['enabled'] or not user['redirect_uris']:
+        return None
+    return types.SimpleNamespace(client_id=client_id, **user)
+
+
+def subject(name, client):
+    """The claims of every scope of the user, with sub, when the user may sign in to the client: an enabled, unlocked
+    user who is not a service account, a member of one of the client's allowed groups when it has any; else None."""
+    with directory() as connection:
+        try:
+            attributes = vpnrouter_users.entry(connection, name)
+        except vpnrouter_users.Failure:
+            return None
+        user = vpnrouter_users.summary(attributes)
+        groups = sorted(vpnrouter_users.groups_of(connection, name))
+        uuid = connection.search_s(vpnrouter_users.dn_of(name), ldap.SCOPE_BASE, attrlist=['entryUUID'])[0][1]['entryUUID']
+    if user['service'] or not user['enabled'] or user['locked']:
+        return None
+    if client.allowed_groups and not set(client.allowed_groups) & set(groups):
+        return None
+    full = ' '.join(part for part in (user['first_name'], user['last_name']) if part)
+    claims = {'sub': uuid[0].decode(), 'preferred_username': name, 'name': full or None, 'given_name': user['first_name'],
+              'family_name': user['last_name'], 'email': user['email'], 'groups': groups}
+    return {claim: value for claim, value in claims.items() if value is not None}
+
+
+def claims_of(person, scopes):
+    """The claims of the scopes of a subject's claims (subject)."""
+    return {'sub': person['sub'], **{claim: person[claim] for scope in scopes for claim in SCOPE_CLAIMS.get(scope, ())
+                                     if claim in person}}
+
+
+def cookie_value(cookies):
+    """The value of the session cookie in a Cookie header, or ''."""
+    try:
+        morsel = http.cookies.SimpleCookie(cookies or '').get(COOKIE)
+    except http.cookies.CookieError:
+        return ''
+    return morsel.value if morsel is not None else ''
+
+
+def session_of(cfg, cookies):
+    """The unexpired Session the session cookie in a Cookie header names, or None."""
+    value = cookie_value(cookies)
+    if not value:
+        return None
+    with vpnrouter_auth.database(cfg) as connection:
+        row = connection.execute('SELECT * FROM oidc_session_get(%s)', (vpnrouter_auth.digest(value),)).fetchone()
+    return Session(*row) if row else None
+
+
+class Validator(RequestValidator):
+    """The checks and the storage of oauthlib's server for the router's clients, users and database.
+
+    Only the authorization code grant with PKCE S256 and the refresh token grant are allowed. The values of a code, a
+    token or a session found are kept on the request as oidc_code, oidc_scopes and oidc_person.
+    """
+
+    def __init__(self, cfg):
+        super().__init__()
+        self.cfg = cfg
+
+    def fetch(self, sql, values):
+        with vpnrouter_auth.database(self.cfg) as connection:
+            return connection.execute(sql, values).fetchone()
+
+    def call(self, *statements):
+        with vpnrouter_auth.database(self.cfg) as connection:
+            for sql, values in statements:
+                connection.execute(sql, values)
+
+    def session(self, request):
+        return session_of(self.cfg, request.headers.get('Cookie'))
+
+    # Clients.
+
+    def validate_client_id(self, client_id, request, *args, **kwargs):
+        request.client = client_of(client_id)
+        return request.client is not None
+
+    def validate_redirect_uri(self, client_id, redirect_uri, request, *args, **kwargs):
+        return redirect_uri in request.client.redirect_uris
+
+    def get_default_redirect_uri(self, client_id, request, *args, **kwargs):
+        return None
+
+    def validate_response_type(self, client_id, response_type, client, request, *args, **kwargs):
+        return response_type == 'code'
+
+    def validate_scopes(self, client_id, scopes, client, request, *args, **kwargs):
+        return 'openid' in scopes and set(scopes) <= set(SCOPES)
+
+    def get_default_scopes(self, client_id, request, *args, **kwargs):
+        return ['openid']
+
+    def is_pkce_required(self, client_id, request):
+        return True
+
+    def authenticate_client(self, request, *args, **kwargs):
+        """Check the client's secret, the password of its service account, given with HTTP Basic authentication, its
+        ID and secret form-encoded (RFC 6749 2.3.1), or in the body."""
+        name, secret = request.client_id, request.client_secret
+        header = request.headers.get('Authorization', '')
+        if header[:6].lower() == 'basic ':
+            try:
+                name, _, secret = base64.b64decode(header[6:].strip(), validate=True).decode().partition(':')
+            except (ValueError, UnicodeDecodeError):
+                return False
+            name, secret = urllib.parse.unquote_plus(name), urllib.parse.unquote_plus(secret)
+        client = client_of(name)
+        if client is None:
+            return False
+        try:
+            vpnrouter_users.login(name, secret, None)
+        except vpnrouter_users.Failure:
+            return False
+        request.client = client
+        return True
+
+    def authenticate_client_id(self, client_id, request, *args, **kwargs):
+        return False
+
+    def validate_grant_type(self, client_id, grant_type, client, request, *args, **kwargs):
+        return grant_type in ('authorization_code', 'refresh_token')
+
+    def validate_user(self, username, password, client, request, *args, **kwargs):
+        return False
+
+    # Codes.
+
+    def save_authorization_code(self, client_id, code, request, *args, **kwargs):
+        self.call(('CALL oidc_code_save(%s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s)',
+                   (vpnrouter_auth.digest(code['code']), client_id, request.user, request.redirect_uri, request.scopes,
+                    request.nonce, request.code_challenge, request.code_challenge_method, request.auth_time, request.amr,
+                    CODE_SECONDS)))
+
+    def code(self, code):
+        row = self.fetch('SELECT * FROM oidc_code_get(%s)', (vpnrouter_auth.digest(code),)) if isinstance(code, str) else None
+        return dict(zip(('client_id', 'name', 'redirect_uri', 'scopes', 'nonce', 'code_challenge', 'code_challenge_method',
+                         'auth_time', 'amr'), row)) if row else None
+
+    def get_authorization_code_scopes(self, client_id, code, redirect_uri, request):
+        found = self.code(code)
+        return found['scopes'] if found else []
+
+    def validate_code(self, client_id, code, client, request, *args, **kwargs):
+        found = self.code(code)
+        if found is None or found['client_id'] != client_id:
+            return False
+        person = subject(found['name'], client)
+        if person is None:
+            return False
+        request.user, request.scopes, request.auth_time, request.amr = found['name'], found['scopes'], found['auth_time'], found['amr']
+        request.oidc_code, request.oidc_person = found, person
+        return True
+
+    def get_code_challenge(self, code, request):
+        return request.oidc_code['code_challenge']
+
+    def get_code_challenge_method(self, code, request):
+        return request.oidc_code['code_challenge_method']
+
+    def confirm_redirect_uri(self, client_id, code, redirect_uri, client, request, *args, **kwargs):
+        return redirect_uri == request.oidc_code['redirect_uri']
+
+    def get_authorization_code_nonce(self, client_id, code, redirect_uri, request):
+        return request.oidc_code['nonce']
+
+    def invalidate_authorization_code(self, client_id, code, request, *args, **kwargs):
+        self.call(('CALL oidc_code_delete(%s)', (vpnrouter_auth.digest(code),)))
+
+    # Tokens.
+
+    def token(self, token, kind):
+        row = self.fetch('SELECT * FROM oidc_token_get(%s, %s)', (vpnrouter_auth.digest(token), kind)) \
+            if isinstance(token, str) and token else None
+        return dict(zip(('client_id', 'name', 'scopes', 'auth_time', 'amr'), row)) if row else None
+
+    def save_bearer_token(self, token, request, *args, **kwargs):
+        """Keep the access token and the refresh token; a refresh token that was exchanged is used up."""
+        values = (request.client.client_id, request.user, request.scopes, request.auth_time, request.amr)
+        statements = [('CALL oidc_token_save(%s, %s, %s, %s, %s, %s, %s, %s)',
+                       (vpnrouter_auth.digest(token['access_token']), 'access', *values, ACCESS_SECONDS))]
+        if token.get('refresh_token'):
+            statements.append(('CALL oidc_token_save(%s, %s, %s, %s, %s, %s, %s, %s)',
+                               (vpnrouter_auth.digest(token['refresh_token']), 'refresh', *values, REFRESH_SECONDS)))
+        if request.grant_type == 'refresh_token':
+            statements.append(('CALL oidc_token_delete(%s)', (vpnrouter_auth.digest(request.refresh_token),)))
+        self.call(*statements)
+
+    def validate_refresh_token(self, refresh_token, client, request, *args, **kwargs):
+        found = self.token(refresh_token, 'refresh')
+        if found is None or found['client_id'] != client.client_id:
+            return False
+        person = subject(found['name'], client)
+        if person is None:
+            return False
+        request.user, request.auth_time, request.amr = found['name'], found['auth_time'], found['amr']
+        request.oidc_scopes, request.oidc_person = found['scopes'], person
+        return True
+
+    def get_original_scopes(self, refresh_token, request, *args, **kwargs):
+        return request.oidc_scopes
+
+    def validate_bearer_token(self, token, scopes, request):
+        found = self.token(token, 'access')
+        if found is None or not set(scopes) <= set(found['scopes']):
+            return False
+        client = client_of(found['client_id'])
+        person = subject(found['name'], client) if client else None
+        if person is None:
+            return False
+        request.client, request.user, request.oidc_scopes, request.oidc_person = client, found['name'], found['scopes'], person
+        return True
+
+    def get_userinfo_claims(self, request):
+        return claims_of(request.oidc_person, request.oidc_scopes)
+
+    # OpenID Connect.
+
+    def finalize_id_token(self, id_token, token, token_handler, request):
+        now = int(time.time())
+        id_token.update(claims_of(request.oidc_person, request.scopes))
+        id_token.update({'iss': vpnrouter.oidc_issuer(self.cfg), 'exp': now + ACCESS_SECONDS,
+                         'auth_time': int(request.auth_time.timestamp()), 'amr': request.amr})
+        return sign(id_token)
+
+    def validate_silent_login(self, request):
+        session = self.session(request)
+        return session is not None and subject(session.name, request.client) is not None
+
+    def validate_silent_authorization(self, request):
+        return True
+
+    def validate_user_match(self, id_token_hint, scopes, claims, request):
+        """Whether the user of the session, when there is one, is the subject of an ID token the router signed."""
+        session = self.session(request) if id_token_hint else None
+        if session is None:
+            return True
+        try:
+            hint = jwt.decode(id_token_hint, private_key().public_key(), algorithms=['RS256'],
+                              options={'verify_exp': False, 'verify_aud': False})
+        except jwt.InvalidTokenError:
+            return False
+        person = subject(session.name, request.client)
+        return person is not None and hint.get('sub') == person['sub']
+
+
+def page(status, cfg, title, message='', error='', form=False, request='', name='', headers=()):
+    """An HTML page of TEMPLATE: a message, an error, and with form the sign-in form for the authorization request."""
+    body = _pages.get_template(TEMPLATE).render(title=title, message=message, error=error, form=form, request=request,
+                                                name=name, issuer=vpnrouter.oidc_issuer(cfg))
+    return status, 'text/html; charset=utf-8', body.encode(), [*PAGE_HEADERS, *headers]
+
+
+def document(status, value, headers=()):
+    return status, 'application/json', json.dumps(value, indent=2).encode() + b'\n', list(headers)
+
+
+def relayed(headers, body, status):
+    """An answer of oauthlib's server, without the headers the web service sets."""
+    kind = next((value for name, value in headers.items() if name.lower() == 'content-type'), 'application/json')
+    return status, kind, (body or '').encode(), [(name, value) for name, value in headers.items()
+                                                 if name.lower() not in OWN_HEADERS]
+
+
+def redirect(location, headers=()):
+    return 302, 'text/plain; charset=utf-8', b'', [('Location', location), *headers]
+
+
+def cookie(value, seconds):
+    return 'Set-Cookie', f'{COOKIE}={value}; Path=/oidc/; Max-Age={seconds}; Secure; HttpOnly; SameSite=Lax'
+
+
+def authorize(server, cfg, params, headers, fresh=None, name='', error=''):
+    """Answer an authorization request, the query or the form params: the sign-in page while the browser has no
+    session, or with prompt=login or max_age older than the session, else a redirect to the client with a code.
+
+    fresh is the session of a sign-in just made, which counts whatever prompt and max_age say; the redirect then sets
+    its cookie, fresh.cookie. error is why a sign-in failed: the sign-in page shows it, filled with the name.
+    """
+    uri = f'{vpnrouter.oidc_issuer(cfg)}/oidc/authorize?{params}'
+    try:
+        scopes, info = server.validate_authorization_request(uri, 'GET', None, headers)
+    except FatalClientError as error:
+        return page(error.status_code, cfg, 'The sign-in request is refused', error=error.description or error.error)
+    except OAuth2Error as error:
+        if not error.redirect_uri:
+            return page(error.status_code, cfg, 'The sign-in request is refused', error=error.description or error.error)
+        return redirect(error.in_uri(error.redirect_uri))
+    request = info['request']
+    title = f'Sign in to {request.client.display_name or request.client.client_id}'
+    if info.get('code_challenge_method') != 'S256':
+        return redirect(InvalidRequestError(description='PKCE with code_challenge_method S256 is required',
+                                            request=request).in_uri(request.redirect_uri))
+    if error:
+        return page(401, cfg, title, error=error, form=True, request=params, name=name)
+    session = fresh.session if fresh else session_of(cfg, headers.get('Cookie'))
+    max_age = getattr(request, 'max_age', None)
+    stale = session is not None and isinstance(max_age, str) and max_age.isdigit() and \
+        time.time() - session.auth_time.timestamp() > int(max_age)
+    prompt = info.get('prompt') or set()
+    if session is None or (not fresh and ('login' in prompt or stale)):
+        if 'none' in prompt:
+            return redirect(LoginRequired(request=request).in_uri(request.redirect_uri))
+        return page(200, cfg, title, form=True, request=params, name=name)
+    if subject(session.name, request.client) is None:
+        if fresh:
+            return redirect(AccessDeniedError(description=f'{session.name} may not sign in to this client',
+                                              request=request).in_uri(request.redirect_uri), [fresh.cookie])
+        return page(403, cfg, title, error=f'{session.name} may not sign in here; sign in as another user.', form=True,
+                    request=params)
+    answer, _, _ = server.create_authorization_response(uri, 'GET', None, headers, scopes, credentials={
+        'user': session.name, 'auth_time': session.auth_time, 'amr': session.amr})
+    return redirect(answer['Location'], [fresh.cookie] if fresh else [])
+
+
+def login(server, cfg, form, headers):
+    """Sign a user in with the sign-in page's form, start the session and go on with its authorization request."""
+    params = form.get('request', '')
+    name = form.get('name', '').strip()
+    try:
+        if form.get('passkey_id'):
+            with vpnrouter_users.session() as connection:
+                name = vpnrouter_passkeys.login_complete(connection, form['passkey_id'], json.loads(form.get('credential', '')))
+            amr = PASSKEY_AMR
+        else:
+            code = form.get('code', '').strip()
+            vpnrouter_users.login(name, form.get('password', ''), code or None)
+            with directory() as connection:
+                if vpnrouter_users.service(vpnrouter_users.entry(connection, name)):
+                    raise vpnrouter_users.Failure('the name, the password or the code is wrong', 5)
+            amr = OTP_AMR if code else PASSWORD_AMR
+    except vpnrouter_users.Failure as failure:
+        return authorize(server, cfg, params, headers, name=name, error=str(failure))
+    except ValueError:
+        return authorize(server, cfg, params, headers, name=name, error='the passkey is not accepted')
+    value = secrets.token_urlsafe(32)
+    with vpnrouter_auth.database(cfg) as connection:
+        connection.execute('CALL oidc_session_save(%s, %s, %s, %s)', (vpnrouter_auth.digest(value), name, amr, SESSION_SECONDS))
+    fresh = types.SimpleNamespace(session=Session(name, datetime.datetime.now(datetime.timezone.utc), amr),
+                                  cookie=cookie(value, SESSION_SECONDS))
+    return authorize(server, cfg, params, headers, fresh=fresh)
+
+
+def logout(cfg, query, headers):
+    """End the session the cookie names, then go to post_logout_redirect_uri, with state, when it is a post-logout
+    redirect URI of the client that client_id or the audience of id_token_hint names; else show that the user is
+    signed out."""
+    values = dict(urllib.parse.parse_qsl(query))
+    value = cookie_value(headers.get('Cookie'))
+    if value:
+        with vpnrouter_auth.database(cfg) as connection:
+            connection.execute('CALL oidc_session_delete(%s)', (vpnrouter_auth.digest(value),))
+    client_id = values.get('client_id')
+    if not client_id and values.get('id_token_hint'):
+        try:
+            audience = jwt.decode(values['id_token_hint'], private_key().public_key(), algorithms=['RS256'],
+                                  options={'verify_exp': False, 'verify_aud': False}).get('aud')
+        except jwt.InvalidTokenError:
+            audience = None
+        client_id = audience[0] if isinstance(audience, list) and audience else audience
+    client = client_of(client_id)
+    target = values.get('post_logout_redirect_uri')
+    expired = cookie('', 0)
+    if client is not None and target in client.post_logout_redirect_uris:
+        return redirect(add_params_to_uri(target, [('state', values['state'])]) if values.get('state') else target, [expired])
+    return page(200, cfg, 'Signed out', message='You are signed out of the router.', headers=[expired])
+
+
+def answer(method, target, headers, body):
+    """Answer a request of the OpenID Provider: the HTTP status, the content type, the body and [(header, value)]; 404
+    while oidc.enabled is false. target is the path with the query, headers a mapping of the request's headers and
+    body its bytes; HEAD is answered as GET."""
+    path, _, query = target.partition('?')
+    method = 'GET' if method == 'HEAD' else method
+    try:
+        cfg = vpnrouter.load_config()
+        if not cfg['oidc']['enabled']:
+            return 404, 'text/plain; charset=utf-8', b'Not found\n', []
+        issuer = vpnrouter.oidc_issuer(cfg)
+        headers = dict(headers.items())
+        text = body.decode('utf-8', 'replace') if body else ''
+        server = Server(Validator(cfg), token_expires_in=ACCESS_SECONDS)
+        if (method, path) == ('GET', '/.well-known/openid-configuration'):
+            return document(200, discovery(issuer))
+        if (method, path) == ('GET', '/oidc/jwks'):
+            return document(200, {'keys': [public_jwk(private_key())]})
+        if path == '/oidc/authorize' and method in ('GET', 'POST'):
+            return authorize(server, cfg, query if method == 'GET' else text, headers)
+        if (method, path) == ('POST', '/oidc/login'):
+            return login(server, cfg, dict(urllib.parse.parse_qsl(text)), headers)
+        if (method, path) == ('POST', '/oidc/passkey'):
+            return document(200, vpnrouter_passkeys.login_begin())
+        if (method, path) == ('POST', '/oidc/token'):
+            return relayed(*server.create_token_response(f'{issuer}{path}', 'POST', text, headers))
+        if path == '/oidc/userinfo' and method in ('GET', 'POST'):
+            return relayed(*server.create_userinfo_response(f'{issuer}{target}', method, text or None, headers))
+        if (method, path) == ('GET', '/oidc/logout'):
+            return logout(cfg, query, headers)
+        return 404, 'text/plain; charset=utf-8', b'Not found\n', []
+    except OAuth2Error as error:
+        return error.status_code, 'application/json', error.json.encode(), list(error.headers.items())
+    except vpnrouter_users.Failure as failure:
+        return document(400 if failure.status == 2 else 500, {'error': str(failure)})
+    except (ldap.LDAPError, OSError) as exc:
+        return document(500, {'error': f'the OpenID Provider failed: {exc}'})
+    except vpnrouter_auth.DatabaseError as exc:
+        return document(500, {'error': str(exc)})
+    except SystemExit as exc:
+        return document(500, {'error': str(exc.code)})
+    except ValueError as exc:
+        return document(400, {'error': 'invalid_request', 'error_description': str(exc)})

debian-package/src/usr/lib/vpn-router/vpnrouter_passkeys.py

@@ -0,0 +1,174 @@
+"""The passkeys of the router's users, for signing in to the Router Manager and the OpenID Provider (vpnrouter_oidc),
+with python3-fido2.
+
+A passkey is a discoverable WebAuthn credential with user verification, of the relying party
+wan.local_fqdn, so the browser offers it at the HTTPS addresses on that name.
+Its user handle is the user name. Each passkey of a user is a value of vpnRouterPasskey on the
+user entry: a JSON object {"id", "credential", "label", "created"}, id the credential ID and
+credential the attested credential data (with the public key), both base64url. A user has at
+most PASSKEYS_MAX passkeys; service accounts have none.
+
+Registration and sign-in are two steps each: begin answers the options for the browser and a
+pending id, whose state the web service keeps in memory for PENDING_SECONDS; complete takes the
+id and the browser's answer. A request that cannot be done raises vpnrouter_users.Failure, with
+the statuses of that module; a sign-in that fails gives status 5 whatever the reason.
+"""
+
+import json
+import secrets
+import threading
+import time
+
+import fido2.features
+import ldap
+from fido2.server import Fido2Server
+from fido2.utils import websafe_decode, websafe_encode
+from fido2.webauthn import (AttestedCredentialData, PublicKeyCredentialRpEntity, PublicKeyCredentialUserEntity,
+                            ResidentKeyRequirement, UserVerificationRequirement)
+
+import vpnrouter
+import vpnrouter_users
+
+# The options and the browser's answers are in the JSON mapping of WebAuthn Level 3; python3-fido2 2.0 always uses it.
+_json_mapping = getattr(fido2.features, 'webauthn_json_mapping', None)
+if _json_mapping is not None:
+    _json_mapping.enabled = True
+
+#: The most passkeys of one user.
+PASSKEYS_MAX = 10
+#: The longest label of a passkey, in characters.
+LABEL_MAX = 64
+#: Seconds a begun registration or sign-in may be completed.
+PENDING_SECONDS = 120
+#: The most begun registrations and sign-ins kept at once.
+PENDING_MAX = 1000
+
+#: The begun registrations and sign-ins: pending id -> (kind, user name or None, state, monotonic time of expiry).
+_pending = {}
+_lock = threading.Lock()
+
+
+def server():
+    """The Fido2Server of the relying party wan.local_fqdn; passkeys need the name."""
+    fqdn = vpnrouter.load_config()['wan']['local_fqdn'].strip()
+    if not fqdn:
+        raise vpnrouter_users.Failure('passkeys need wan.local_fqdn, the name the Router Manager is reached at', 2)
+    return Fido2Server(rp=PublicKeyCredentialRpEntity(name=fqdn, id=fqdn))
+
+
+def keep(kind, name, state):
+    """Keep the state of a begun step and answer its pending id."""
+    pending = secrets.token_urlsafe(24)
+    now = time.monotonic()
+    with _lock:
+        for old in [key for key, (*_, expires) in _pending.items() if expires <= now]:
+            del _pending[old]
+        if len(_pending) >= PENDING_MAX:
+            raise vpnrouter_users.Failure('too many passkey requests at once; retry in a moment')
+        _pending[pending] = (kind, name, state, now + PENDING_SECONDS)
+    return pending
+
+
+def take(kind, name, pending):
+    """The state of a begun step of the kind and user, used up; None when it is unknown or expired."""
+    with _lock:
+        found = _pending.pop(pending, None) if isinstance(pending, str) else None
+    if found is None or found[0] != kind or found[1] != name or found[3] <= time.monotonic():
+        return None
+    return found[2]
+
+
+def credentials(attributes):
+    """The attested credential data of the passkeys of an entry."""
+    return [AttestedCredentialData(websafe_decode(passkey['credential']))
+            for _, passkey in vpnrouter_users.passkeys_of(attributes)]
+
+
+def register_begin(connection, name):
+    """Begin the registration of a passkey of the user: {"id", "options"}, options those of navigator.credentials.create."""
+    current = vpnrouter_users.entry(connection, name)
+    if vpnrouter_users.service(current):
+        raise vpnrouter_users.Failure(f'{name} is a service account, which has no passkeys', 2)
+    if len(vpnrouter_users.passkeys_of(current)) >= PASSKEYS_MAX:
+        raise vpnrouter_users.Failure(f'user {name} has {PASSKEYS_MAX} passkeys, the most; remove one first', 2)
+    options, state = server().register_begin(
+        PublicKeyCredentialUserEntity(id=name.encode(), name=name, display_name=name),
+        credentials(current),
+        resident_key_requirement=ResidentKeyRequirement.REQUIRED,
+        user_verification=UserVerificationRequirement.REQUIRED,
+    )
+    return {'id': keep('register', name, state), 'options': dict(options)}
+
+
+def register_complete(connection, name, pending, response, label):
+    """Store the passkey the browser created for a begun registration, with its label; the user (vpnrouter_users.summary)."""
+    state = take('register', name, pending)
+    if state is None:
+        raise vpnrouter_users.Failure('the registration is unknown or expired; begin it again', 2)
+    if label is None or (isinstance(label, str) and not label.strip()):
+        label = 'Passkey'
+    if not isinstance(label, str) or len(label.strip()) > LABEL_MAX:
+        raise vpnrouter_users.Failure(f'the label must be text of at most {LABEL_MAX} characters', 2)
+    if not isinstance(response, dict):
+        raise vpnrouter_users.Failure('credential must be the answer of navigator.credentials.create as JSON', 2)
+    try:
+        data = server().register_complete(state, response).credential_data
+    except (ValueError, KeyError, TypeError) as exc:
+        raise vpnrouter_users.Failure(f'the passkey is refused: {exc}', 2)
+    current = vpnrouter_users.entry(connection, name)
+    value = json.dumps({
+        'id': websafe_encode(data.credential_id),
+        'credential': websafe_encode(bytes(data)),
+        'label': label.strip(),
+        'created': time.strftime('%Y-%m-%dT%H:%M:%SZ', time.gmtime()),
+    }, separators=(',', ':'))
+    changes = [] if 'vpnrouteraccount' in vpnrouter_users.classes(current) else [(ldap.MOD_ADD, 'objectClass', [b'vpnRouterAccount'])]
+    changes.append((ldap.MOD_ADD, 'vpnRouterPasskey', [value.encode()]))
+    connection.modify_s(vpnrouter_users.dn_of(name), changes)
+    return vpnrouter_users.summary(vpnrouter_users.entry(connection, name))
+
+
+def remove(connection, name, passkey_id=None):
+    """Remove the user's passkey of the id, or all its passkeys without one; the user (vpnrouter_users.summary)."""
+    current = vpnrouter_users.entry(connection, name)
+    values = current.get('vpnRouterPasskey', [])
+    kept = [value for value, passkey in vpnrouter_users.passkeys_of(current)
+            if passkey_id is not None and passkey['id'] != passkey_id]
+    if passkey_id is not None and len(kept) == len(vpnrouter_users.passkeys_of(current)):
+        raise vpnrouter_users.Failure(f'user {name} has no passkey {passkey_id}', 3)
+    if len(kept) != len(values):
+        connection.modify_s(vpnrouter_users.dn_of(name), [(ldap.MOD_REPLACE, 'vpnRouterPasskey', kept)])
+    return vpnrouter_users.summary(vpnrouter_users.entry(connection, name))
+
+
+def login_begin():
+    """Begin a sign-in with a passkey: {"id", "options"}, options those of navigator.credentials.get, for any user."""
+    options, state = server().authenticate_begin(user_verification=UserVerificationRequirement.REQUIRED)
+    return {'id': keep('login', None, state), 'options': dict(options)}
+
+
+def login_complete(connection, pending, response):
+    """The name of the user whose passkey signed a begun sign-in, when the user is enabled, not locked and not a
+    service account."""
+    refused = vpnrouter_users.Failure('the passkey is not accepted', 5)
+    state = take('login', None, pending)
+    if state is None or not isinstance(response, dict):
+        raise refused
+    try:
+        name = websafe_decode(response['response']['userHandle']).decode()
+    except (KeyError, TypeError, ValueError):
+        raise refused
+    if not vpnrouter_users.NAME.match(name):
+        raise refused
+    try:
+        current = vpnrouter_users.entry(connection, name)
+    except vpnrouter_users.Failure:
+        raise refused
+    user = vpnrouter_users.summary(current)
+    if user['service'] or not user['enabled'] or user['locked']:
+        raise refused
+    try:
+        server().authenticate_complete(state, credentials(current), response)
+    except (ValueError, KeyError, TypeError):
+        raise refused
+    return name

debian-package/src/usr/lib/vpn-router/vpnrouter_pki.py

@@ -722,7 +722,7 @@ def install_crls(connection):
     crls = {}
     for name, file in SWANCTL_CA_FILES.items():
         entry = authority(connection, name)
-        crls[name] = entry['crl'].public_bytes(serialization.Encoding.PEM) if entry and entry['crl'] else None
+        crls[name] = entry['crl'].public_bytes(serialization.Encoding.PEM) if entry and entry['crl'] is not None else None
         changed |= write(X509CRL_DIR / file, crls[name], 0o644) if crls[name] else remove(X509CRL_DIR / file)
     if crls['root'] and crls['p2s']:
         changed |= write(OPENVPN_CRL, crls['root'] + crls['p2s'], 0o644)

debian-package/src/usr/lib/vpn-router/vpnrouter_platforms/__init__.py

@@ -10,7 +10,7 @@ adding one file here. Nothing in the core has to be edited.
 
 A module may define any of:
 
-    EXTRA_P2S_DNS   str, added to the road-warrior pool 'dns' list
+    EXTRA_P2S_DNS   str, added to the 'dns' list of the IKEv2 address pool
     EXTRA_LOCAL_TS  str, added to 'local_ts' on both connections
     apply(ctx)      called once the system has been configured, to apply
                     platform-specific state. Must be idempotent. ctx is the

debian-package/src/usr/lib/vpn-router/vpnrouter_platforms/azure.py

@@ -3,9 +3,9 @@
 No platform-specific configuration is currently required.
 
 The Azure platform resolver 168.63.129.16 is deliberately *not* advertised to
-road-warrior clients and *not* added to the traffic selectors. Clients are
-given the router itself as their DNS server, and the router forwards through
-its own systemd-resolved via the p2s-forwarder drop-in. That resolves
+IKEv2 clients and *not* added to the traffic selectors. Clients are
+given the router's addresses of p2s.dns_listen as their DNS servers, where dnsmasq
+forwards to the router's own systemd-resolved. That resolves
 Azure-internal names without routing the wireserver address through the tunnel
 and without a second resolver in the pool.
 """

debian-package/src/usr/lib/vpn-router/vpnrouter_platforms/gcp.py

@@ -2,7 +2,7 @@
 
 No platform-specific configuration is currently required.
 
-As on Azure, road-warrior clients are given the router itself as their DNS
+As on Azure, IKEv2 clients are given the router itself as their DNS
 server and the router forwards through its own systemd-resolved, so the
 metadata resolver does not belong in the pool or in the traffic selectors.
 """

debian-package/src/usr/lib/vpn-router/vpnrouter_sites.py

@@ -0,0 +1,439 @@
+"""The static web sites Caddy serves, for the web service, vpn-router-site, vpn-router-setup and webdav-auth.
+
+A site is a row of the sites table in the vpn-router-sites database, which the web service creates on its first run
+(provision) with its role and the password in DATABASE_SECRET; SITES_SQL defines the table and its procedures, and the
+first connection of a process loads it. A site has a name, which also names its folder SITES_DIR/<name>, the host names
+Caddy answers on its port (hosts, the names TLS clients send as SNI; none answers any name), the interfaces whose
+firewall opens the port (listen), and TLS: none (plain HTTP), acme (a certificate of Let's Encrypt), ca (certificates
+Caddy issues with one of pki.issuing_cas) or file (a certificate and key given with the site). Caddy serves the files of
+the folder, index_file for a folder, and with spa index_file of the site for any path without a file. editors names
+the group whose members change the site's files besides the admins, through the web service and WebDAV.
+
+The sites are served while sites.enabled is true; vpn-router-setup writes Caddy's configuration and opens the ports. A
+site is changed only through this module, which checks it (check), and its callers then restart vpn-router-setup.
+
+The files of a site are read and written by path relative to its folder; resolve() refuses a path that leaves it.
+receive() writes a file from a stream, extract() a zip archive into a folder; both stop at sites.upload_max_mb.
+
+Every failure of the database raises DatabaseError; a request that cannot be done raises Failure, whose status says
+why: 2 invalid, 3 no such site, 4 the site exists, 1 anything else.
+"""
+
+import contextlib
+import datetime
+import os
+import pathlib
+import re
+import shutil
+import stat
+import tempfile
+import zipfile
+
+import psycopg
+from psycopg.rows import dict_row
+from cryptography import x509
+from cryptography.hazmat.primitives import serialization
+
+import vpnrouter
+import vpnrouter_auth
+import vpnrouter_pki
+import vpnrouter_users
+
+DATABASE = 'vpn-router-sites'
+DATABASE_SECRET = pathlib.Path('/etc/vpn-router/sites-database.secret')
+SITES_SQL = pathlib.Path('/usr/share/vpn-router/sql/sites.sql')
+
+#: The folders of the sites, SITES_DIR/<name>.
+SITES_DIR = pathlib.Path('/var/lib/vpn-router/sites')
+
+#: The name of a site, which also names its folder.
+NAME = re.compile(r'^[a-z][a-z0-9-]{0,30}$')
+
+#: A file name of index_file.
+INDEX = re.compile(r'^[A-Za-z0-9_-][A-Za-z0-9._-]{0,63}$')
+
+LISTEN = vpnrouter.LISTEN_CHOICES
+TLS = ('none', 'acme', 'ca', 'file')
+
+#: The most host names of one site.
+HOSTS_MAX = 16
+
+#: The most members a zip archive extract() takes.
+ARCHIVE_MEMBERS_MAX = 10000
+
+#: The bytes copied at once from a stream.
+CHUNK = 65536
+
+#: The settings of a site and their defaults; the type of a default is the required type.
+SETTINGS = {'enabled': True, 'hosts': [], 'port': 443, 'listen': 'external', 'tls': 'acme', 'ca': '', 'certificate': '',
+            'private_key': '', 'index_file': 'index.html', 'spa': False, 'editors': ''}
+
+#: Whether this process has loaded SITES_SQL.
+_loaded = False
+
+
+class DatabaseError(Exception):
+    """The database of the sites failed."""
+
+
+class Failure(Exception):
+    """A request that cannot be done; status is 2 invalid, 3 no such site, 4 the site exists, 1 other."""
+
+    def __init__(self, message, status=1):
+        super().__init__(message)
+        self.status = status
+
+
+def provision():
+    """Create the role, its password file and the database of the sites when they are missing."""
+    vpnrouter_auth.provision_database(DATABASE, DATABASE_SECRET)
+
+
+@contextlib.contextmanager
+def database():
+    """A connection to the database of the sites, with its table and procedures, closed at the end; DatabaseError on any
+    failure, also before the web service has created the database."""
+    global _loaded
+    try:
+        schema = None if _loaded else SITES_SQL.read_text(encoding='utf-8')
+        target = vpnrouter_auth.local_connection(DATABASE, DATABASE_SECRET)
+    except OSError as exc:
+        raise DatabaseError(f'the database of the sites is not ready: {exc}') from exc
+    try:
+        with psycopg.connect(target, autocommit=True, row_factory=dict_row) as connection:
+            if schema is not None:
+                connection.execute(schema)
+                _loaded = True
+            yield connection
+    except psycopg.Error as exc:
+        raise DatabaseError(f'the database of the sites failed: {exc}') from exc
+
+
+def shown(row):
+    """A site as the answers show it: its settings without the private key, with private_key_set and its folder."""
+    site = {key: value for key, value in row.items() if key != 'private_key'}
+    site['private_key_set'] = bool(row.get('private_key'))
+    site['modified'] = row['modified'].isoformat(timespec='seconds')
+    site['directory'] = str(SITES_DIR / row['name'])
+    return site
+
+
+def listing():
+    """Every site, as shown()."""
+    with database() as connection:
+        return [shown(row) for row in connection.execute('SELECT * FROM sites_list()').fetchall()]
+
+
+def served():
+    """The enabled sites with their private keys."""
+    with database() as connection:
+        return connection.execute('SELECT * FROM sites_served()').fetchall()
+
+
+def get(connection, name):
+    """The site with its private key; Failure with status 3 when there is none."""
+    if not isinstance(name, str) or not NAME.match(name):
+        raise Failure(f'no site {name}', 3)
+    row = connection.execute('SELECT * FROM site_get(%s)', (name,)).fetchone()
+    if row is None:
+        raise Failure(f'no site {name}', 3)
+    return row
+
+
+def editable(groups):
+    """The names of the sites whose files the members of the groups may change."""
+    with database() as connection:
+        return [row['name'] for row in connection.execute('SELECT * FROM sites_editable(%s)', (list(groups),))]
+
+
+def sites_of_group(group):
+    """The names of the sites whose editors are the group; [] before the web service has created the database."""
+    if not DATABASE_SECRET.is_file():
+        return []
+    with database() as connection:
+        return [row['name'] for row in connection.execute('SELECT * FROM sites_of_group(%s)', (group,))]
+
+
+def rename_group(old, new):
+    """Give the sites whose editors are the group old its new name."""
+    if DATABASE_SECRET.is_file():
+        with database() as connection:
+            connection.execute('CALL sites_rename_group(%s, %s)', (old, new))
+
+
+def taken_ports(cfg):
+    """The TCP ports of the router's own services, port -> what has it, which no site may take."""
+    taken = {22: 'SSH', cfg['web']['port']: 'web.port', cfg['https']['web_port']: 'https.web_port',
+             cfg['https']['manager_port']: 'https.manager_port', cfg['metrics']['port']: 'metrics.port',
+             cfg['metrics']['https_port']: 'metrics.https_port', vpnrouter.manager_port(): 'the Router Manager',
+             cfg['sites']['webdav_port']: 'sites.webdav_port', vpnrouter.WEBDAV_LOOPBACK_PORT: 'rclone\'s WebDAV',
+             53: 'DNS'}
+    for port in vpnrouter.BOOTSTRAP_PORTS:
+        taken[port] = 'the bootstrap services'
+    if cfg['openvpn']['protocol'] == 'tcp':
+        taken[cfg['openvpn']['port']] = 'openvpn.port'
+    for item in cfg['docker']['exposed_ports']:
+        first, _, last = item.strip().partition(':')
+        if first.isdigit() and (not last or last.isdigit()):
+            for port in range(int(first), int(last or first) + 1):
+                taken[port] = 'docker.exposed_ports'
+    return taken
+
+
+def check_certificate(certificate, private_key, hosts):
+    """Refuse a PEM certificate chain whose first certificate is not the key's or names none of the hosts."""
+    try:
+        chain = x509.load_pem_x509_certificates(certificate.encode())
+    except ValueError:
+        raise Failure('certificate must be PEM certificates, the site\'s first', 2)
+    try:
+        key = serialization.load_pem_private_key(private_key.encode(), password=None)
+    except (ValueError, TypeError):
+        raise Failure('private_key must be an unencrypted PEM private key', 2)
+    if not vpnrouter_pki.same_key(chain[0].public_key(), key.public_key()):
+        raise Failure('private_key is not the key of the certificate', 2)
+    names = {value.partition(':')[2] for value in vpnrouter_pki.san_values(chain[0]) if not value.startswith('email:')}
+    missing = [host for host in hosts if host not in names and f'*.{host.partition(".")[2]}' not in names]
+    if missing:
+        raise Failure(f'the certificate does not name {", ".join(missing)}', 2)
+
+
+def check(cfg, sites, site):
+    """Refuse a site, a dict of SETTINGS with its name, that is invalid or collides with the other sites (sites, rows of
+    the table) or with the router's own ports."""
+    name = site['name']
+    if not isinstance(name, str) or not NAME.match(name):
+        raise Failure('a site name starts with a lowercase letter and has at most 31 lowercase letters, digits and '
+                      'hyphens', 2)
+    for option, default in SETTINGS.items():
+        value = site[option]
+        if type(value) is not type(default) or (isinstance(value, list) and not all(isinstance(item, str) for item in value)):
+            raise Failure(f'{option} must be {vpnrouter.TYPE_NAMES[type(default)]}', 2)
+    hosts = site['hosts']
+    if len(hosts) > HOSTS_MAX or len(set(hosts)) != len(hosts):
+        raise Failure(f'hosts must be at most {HOSTS_MAX} different host names', 2)
+    for host in hosts:
+        if not (vpnrouter_pki.DNS_NAME.match(host) or vpnrouter_pki.is_address(host)):
+            raise Failure(f'hosts: {host!r} is not a host name in lowercase or an IP address', 2)
+        if host == cfg['wan']['local_fqdn'].strip():
+            raise Failure(f'hosts: {host} is wan.local_fqdn, the name of the router\'s own services', 2)
+    port = site['port']
+    if not 1 <= port <= 65535:
+        raise Failure(f'port: {port} is not a port', 2)
+    taken = taken_ports(cfg)
+    if port in taken:
+        raise Failure(f'port: {port} is the port of {taken[port]}', 2)
+    if site['listen'] not in LISTEN:
+        raise Failure(f'listen: {site["listen"]!r} is not one of {", ".join(LISTEN)}', 2)
+    tls = site['tls']
+    if tls not in TLS:
+        raise Failure(f'tls: {tls!r} is not one of {", ".join(TLS)}', 2)
+    if tls != 'none' and not hosts:
+        raise Failure(f'tls {tls} needs hosts, the names of the certificate', 2)
+    if tls == 'acme' and any(host.startswith('*.') or vpnrouter_pki.is_address(host) for host in hosts):
+        raise Failure('tls acme takes host names only, without wildcards', 2)
+    if tls == 'ca':
+        authorities = {key: value for key, value in vpnrouter.issuing_cas(cfg).items() if not value['builtin']}
+        if site['ca'] not in authorities:
+            raise Failure(f'ca: {site["ca"]!r} is not one of pki.issuing_cas', 2)
+    if tls == 'file':
+        check_certificate(site['certificate'], site['private_key'], hosts)
+    if not INDEX.match(site['index_file']):
+        raise Failure('index_file must be a file name', 2)
+    if site['editors']:
+        with vpnrouter_users.session() as connection:
+            try:
+                vpnrouter_users.group_entry(connection, site['editors'])
+            except vpnrouter_users.Failure:
+                raise Failure(f'editors: group {site["editors"]} does not exist', 2)
+    if not site['enabled']:
+        return
+    for other in sites:
+        if other['name'] == name or not other['enabled'] or other['port'] != port:
+            continue
+        prefix = f'port {port} is also the port of site {other["name"]}'
+        if (other['tls'] == 'none') != (tls == 'none'):
+            raise Failure(f'{prefix}, which is {"plain HTTP" if other["tls"] == "none" else "HTTPS"}', 2)
+        if other['listen'] != site['listen']:
+            raise Failure(f'{prefix}, which listens on {other["listen"]}', 2)
+        if not hosts or not other['hosts']:
+            raise Failure(f'{prefix}; sites sharing a port need host names', 2)
+        common = sorted(set(hosts) & set(other['hosts']))
+        if common:
+            raise Failure(f'{prefix}, which has {", ".join(common)} too', 2)
+
+
+def save(cfg, name, values, create):
+    """Add the site with values, a dict of some of SETTINGS (create), or change those of an existing one; the site as
+    shown(). An absent or empty private_key keeps the current one."""
+    unknown = sorted(set(values) - set(SETTINGS))
+    if unknown:
+        raise Failure(f'unknown settings: {", ".join(unknown)}', 2)
+    with database() as connection:
+        rows = connection.execute('SELECT * FROM sites_list()').fetchall()
+        current = next((row for row in rows if row['name'] == name), None)
+        if create and current is not None:
+            raise Failure(f'site {name} exists', 4)
+        if not create:
+            current = get(connection, name)
+        site = {**SETTINGS, **({key: current[key] for key in SETTINGS} if current else {}), 'name': name}
+        site.update({key: value for key, value in values.items() if key != 'private_key' or value})
+        if isinstance(site['hosts'], list):
+            site['hosts'] = [host.strip().lower() for host in site['hosts'] if isinstance(host, str) and host.strip()]
+        if site['tls'] != 'file':
+            site['certificate'] = site['private_key'] = ''
+        if site['tls'] != 'ca':
+            site['ca'] = ''
+        check(cfg, rows, site)
+        connection.execute('CALL site_put(%s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s)',
+                           tuple(site[key] for key in ('name', *SETTINGS)))
+        ensure_folders([name])
+        return shown(get(connection, name))
+
+
+def remove(name, content):
+    """Remove the site, and with content its folder."""
+    with database() as connection:
+        get(connection, name)
+        connection.execute('CALL site_remove(%s)', (name,))
+    if content:
+        shutil.rmtree(SITES_DIR / name, ignore_errors=True)
+    return {'name': name, 'removed': True}
+
+
+def ensure_folders(names):
+    """Create the folders of the sites that miss one, readable by all."""
+    SITES_DIR.mkdir(mode=0o755, parents=True, exist_ok=True)
+    for name in names:
+        (SITES_DIR / name).mkdir(mode=0o755, exist_ok=True)
+
+
+def resolve(name, relative):
+    """The path of the site's file or folder relative to its folder; Failure with status 2 for a path that leaves it,
+    status 3 when the site has no folder."""
+    if not isinstance(name, str) or not NAME.match(name):
+        raise Failure(f'no site {name}', 3)
+    base = SITES_DIR / name
+    if not base.is_dir():
+        raise Failure(f'site {name} has no folder', 3)
+    if '\0' in relative or any(part in ('.', '..') for part in relative.split('/')):
+        raise Failure(f'{relative!r} is not a path in the site\'s folder', 2)
+    target = pathlib.Path(os.path.realpath(base / relative.strip('/')))
+    if target != base and base not in target.parents:
+        raise Failure(f'{relative!r} is not a path in the site\'s folder', 2)
+    return target
+
+
+def relative_of(name, path):
+    return str(path.relative_to(SITES_DIR / name))
+
+
+def entries(name, folder):
+    """The entries of a folder of the site: [{name, folder, size, modified}], folders first, then by name."""
+    found = []
+    for item in os.scandir(folder):
+        try:
+            info = item.stat(follow_symlinks=False)
+        except OSError:
+            continue
+        found.append({'name': item.name, 'folder': stat.S_ISDIR(info.st_mode),
+                      'size': info.st_size if stat.S_ISREG(info.st_mode) else 0,
+                      'modified': datetime.datetime.fromtimestamp(info.st_mtime, datetime.timezone.utc)
+                      .isoformat(timespec='seconds')})
+    return {'path': relative_of(name, folder) if folder != SITES_DIR / name else '',
+            'entries': sorted(found, key=lambda entry: (not entry['folder'], entry['name']))}
+
+
+def receive(stream, length, target, limit):
+    """Write length bytes of the stream to the file target, replacing it in one step; Failure with status 2 over limit
+    bytes. Its folders are created."""
+    if length > limit:
+        raise Failure(f'the file has {length} bytes, more than sites.upload_max_mb allows', 2)
+    if target.is_dir():
+        raise Failure(f'{target.name} is a folder', 2)
+    target.parent.mkdir(mode=0o755, parents=True, exist_ok=True)
+    descriptor, name = tempfile.mkstemp(dir=target.parent, prefix=f'.{target.name}.')
+    try:
+        with os.fdopen(descriptor, 'wb') as handle:
+            left = length
+            while left:
+                data = stream.read(min(CHUNK, left))
+                if not data:
+                    raise Failure('the client sent less than its Content-Length', 2)
+                handle.write(data)
+                left -= len(data)
+        os.chmod(name, 0o644)
+        os.replace(name, target)
+    except BaseException:
+        os.unlink(name)
+        raise
+
+
+def extract(stream, length, folder, limit):
+    """Extract the zip archive of length bytes of the stream into the folder, created when missing; the number of files.
+
+    A member with an absolute path, a .. or a link, more than ARCHIVE_MEMBERS_MAX members or more than limit bytes
+    unpacked refuse the whole archive, before anything is written.
+    """
+    if length > limit:
+        raise Failure(f'the archive has {length} bytes, more than sites.upload_max_mb allows', 2)
+    folder.mkdir(mode=0o755, parents=True, exist_ok=True)
+    with tempfile.TemporaryFile(dir=folder) as spool:
+        left = length
+        while left:
+            data = stream.read(min(CHUNK, left))
+            if not data:
+                raise Failure('the client sent less than its Content-Length', 2)
+            spool.write(data)
+            left -= len(data)
+        spool.seek(0)
+        try:
+            archive = zipfile.ZipFile(spool)
+        except zipfile.BadZipFile:
+            raise Failure('the file is not a zip archive', 2)
+        with archive:
+            members = archive.infolist()
+            if len(members) > ARCHIVE_MEMBERS_MAX:
+                raise Failure(f'the archive has more than {ARCHIVE_MEMBERS_MAX} members', 2)
+            if sum(member.file_size for member in members) > limit:
+                raise Failure('the archive unpacks to more than sites.upload_max_mb allows', 2)
+            for member in members:
+                parts = member.filename.replace('\\', '/').split('/')
+                if member.filename.startswith('/') or '..' in parts or '\0' in member.filename or \
+                        stat.S_ISLNK(member.external_attr >> 16):
+                    raise Failure(f'the archive member {member.filename!r} is a link or leaves the folder', 2)
+            count = 0
+            for member in members:
+                target = folder / member.filename.replace('\\', '/').strip('/')
+                if member.is_dir():
+                    target.mkdir(mode=0o755, parents=True, exist_ok=True)
+                    continue
+                target.parent.mkdir(mode=0o755, parents=True, exist_ok=True)
+                with archive.open(member) as source:
+                    receive(source, member.file_size, target, limit)
+                count += 1
+    return count
+
+
+def make_folder(target):
+    target.mkdir(mode=0o755, parents=True, exist_ok=True)
+
+
+def rename(name, source, relative):
+    """Move the file or folder source of the site to the path relative to its folder; Failure when that exists."""
+    target = resolve(name, relative)
+    if target.exists():
+        raise Failure(f'{relative} exists', 4)
+    target.parent.mkdir(mode=0o755, parents=True, exist_ok=True)
+    os.replace(source, target)
+    return target
+
+
+def delete(name, target):
+    """Remove the file or folder of the site, but not its folder."""
+    if target == SITES_DIR / name:
+        raise Failure('the site\'s folder itself cannot be removed', 2)
+    if target.is_dir() and not target.is_symlink():
+        shutil.rmtree(target)
+    else:
+        target.unlink()

debian-package/src/usr/lib/vpn-router/vpnrouter_users.py

@@ -15,10 +15,21 @@ internal service accounts are those the router creates and manages for its own s
 included (internal_accounts); vpn-router-setup keeps the metrics service's.
 Users exist whether or not a P2S system is enabled.
 
+A service account with redirect URIs is a client of the OpenID Provider (vpnrouter_oidc), its name the client ID and
+its password the client secret (client_settings): redirect_uris, where the provider sends a user back after a sign-in,
+post_logout_redirect_uris, after a sign-out, and allowed_groups, the groups whose members may sign in to it, every
+user who is not a service account when there are none.
+
 A group is a groupOfNames in ou=groups with a name, which follows the rules of user names, an
 optional description and at least one member; a group cannot be empty, so the last member
-cannot leave it and a user who is the last member of a group cannot be removed. Groups only
-record membership; nothing on the router reads them.
+cannot leave it and a user who is the last member of a group cannot be removed. ADMIN_GROUP grants the management of
+the router, the allowed groups of the OpenID Provider's clients who may sign in to them, and the editors group of a web
+site who may change its files (vpnrouter_sites); renaming a group renames it in those, and a group a client allows or a
+site has cannot be removed.
+
+A VPN user may have WireGuard peers, each a device with its public key and its IPs, in
+vpnRouterWireGuardPeer; vpn-router-setup writes a [Peer] of wg0.conf for each peer of a user who
+is not disabled.
 
 A user may have a TOTP token: the user entry itself is an oathTOTPUser and oathTOTPToken whose
 oathTOTPToken points to itself, with the secret in oathSecret and the parameters of
@@ -26,13 +37,17 @@ vpnrouter_ldap.TOTP_PARAMS. Enrolment stores nothing until a code of the new sec
 verified: otp_new makes a secret and its otpauth URI, and otp_enrol stores the secret given a
 code of it. slapd's otp overlay then takes the password followed by a code at every bind.
 
+A user who is not a service account may have passkeys for signing in to the Router Manager, in
+vpnRouterPasskey (vpnrouter_passkeys registers and checks them).
+
 A user is disabled when pwdAccountLockedTime holds LOCKED, and locked when the password
 policy has set it after failed binds, for vpnrouter_ldap.LOCKOUT_SECONDS; unlock ends that.
 login() checks a user's password and code with a bind. Members of ADMIN_GROUP manage the
 router through the web service.
 
-A member of ADMIN_GROUP may have console login (console): the Shell page of the Router Manager,
-and SSH and sudo with the directory's password, followed by the code for an enrolled user. The
+A member of ADMIN_GROUP with a TOTP token may have console login (console): the Shell page of the
+Router Manager, and SSH and sudo with the directory's password followed by the code; without the
+token the console is refused, also for one whose console login was switched on before. The
 console runs as a local account, or as the user's own posixAccount, which the user entry becomes
 and nslcd serves to the system. Leaving ADMIN_GROUP switches it off. The module knows only the directory; the callers revoke a
 user's refresh tokens after the operations of vpnrouter_auth.REVOKING.
@@ -48,15 +63,24 @@ import calendar
 import contextlib
 import fcntl
 import grp
+import ipaddress
+import json
+import plistlib
 import pwd
 import re
 import subprocess
 import time
+import urllib.parse
+import uuid
 
 import ldap
 import ldap.filter
 import ldap.modlist
 import pyotp
+from cryptography import x509
+from cryptography.hazmat.primitives import hashes, serialization
+from cryptography.hazmat.primitives.asymmetric import ec, rsa
+from cryptography.hazmat.primitives.serialization import pkcs12
 
 import vpnrouter
 import vpnrouter_ldap
@@ -64,6 +88,8 @@ import vpnrouter_pki
 
 #: A user name is one lowercase DNS label, as it is also the common name of the certificate.
 NAME = re.compile(r'^[a-z][a-z0-9-]{0,30}[a-z0-9]$|^[a-z]$')
+#: The other name of a service account: a GUID in lowercase hexadecimal, as the Router Manager proposes one.
+GUID = re.compile(r'^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$')
 PASSWORD_MIN = 8
 PASSWORD_MAX = 128
 #: The longest first or last name, in characters.
@@ -78,7 +104,17 @@ LABELS = (('display_name', 'displayName'), ('description', 'description'))
 #: The attributes read for a user.
 ATTRIBUTES = ['uid', 'objectClass', 'pwdAccountLockedTime', 'givenName', 'sn', 'mail', 'oathTOTPToken', 'vpnRouterScope',
               'displayName', 'description', 'userCertificate;binary', 'vpnRouterConsoleLogin', 'vpnRouterConsoleAccount',
-              'uidNumber']
+              'uidNumber', 'vpnRouterWireGuardPeer', 'vpnRouterPasskey', 'vpnRouterRedirectUri',
+              'vpnRouterPostLogoutRedirectUri', 'vpnRouterAllowedGroup']
+#: The keys of the URIs of an OpenID Provider client and their LDAP attributes.
+CLIENT_URIS = (('redirect_uris', 'vpnRouterRedirectUri'), ('post_logout_redirect_uris', 'vpnRouterPostLogoutRedirectUri'))
+#: The most URIs of each kind and allowed groups of one client, and the longest URI.
+CLIENT_VALUES_MAX = 16
+URI_MAX = 1024
+#: The hosts a client's URI may name over plain HTTP: those of the system it runs on.
+LOOPBACK_HOSTS = ('localhost', '127.0.0.1', '::1')
+#: The most WireGuard peers of one user.
+WIREGUARD_PEERS_MAX = 16
 #: The vpnRouterScope of a service account.
 SERVICE_SCOPE = 'service'
 #: The object classes of a VPN user and of a Manager-only account.
@@ -94,7 +130,7 @@ GROUP_ATTRIBUTES = ['cn', 'description', 'member']
 #: The longest group description, in characters.
 DESCRIPTION_MAX = 256
 #: The value of pwdAccountLockedTime that disables an account until it is enabled.
-LOCKED = b'000001010000Z'
+LOCKED = vpnrouter_ldap.DISABLED.encode()
 #: The group whose members manage the router through the web service.
 ADMIN_GROUP = 'admins'
 #: The digits of a TOTP code given to login().
@@ -123,9 +159,11 @@ def session():
             connection.unbind_s()
 
 
-def check_name(name):
-    if not isinstance(name, str) or not NAME.match(name):
-        raise Failure('a user name is 1 to 32 lowercase letters, digits and hyphens, starting with a letter', 2)
+def check_name(name, service=True):
+    """Refuse a name that is not a user name (NAME), or, with service, the GUID of a service account either."""
+    if not isinstance(name, str) or not (NAME.match(name) or service and GUID.match(name)):
+        raise Failure('a user name is 1 to 32 lowercase letters, digits and hyphens, starting with a letter'
+                      + (', or, for a service account, a GUID in lowercase' if service else ''), 2)
 
 
 def check_password(value):
@@ -179,6 +217,47 @@ def labels(values):
     return found
 
 
+def client_settings(connection, values):
+    """The OpenID Provider client settings of a service account in values ({redirect_uris, post_logout_redirect_uris,
+    allowed_groups}), checked, as {LDAP attribute: [value, ...]}; a key whose value is None is not given, [] means none.
+
+    A URI is absolute, has no fragment and uses https, or http for a host of LOOPBACK_HOSTS; an allowed group exists. Each
+    list has at most CLIENT_VALUES_MAX values.
+    """
+    found = {}
+    for key, attribute in CLIENT_URIS:
+        uris = values.get(key)
+        if uris is None:
+            continue
+        if not isinstance(uris, list) or len(uris) > CLIENT_VALUES_MAX or not all(isinstance(uri, str) for uri in uris):
+            raise Failure(f'{key} must be a list of at most {CLIENT_VALUES_MAX} URIs', 2)
+        for uri in uris:
+            try:
+                parts = urllib.parse.urlsplit(uri)
+                host = parts.hostname
+            except ValueError:
+                host = None
+            if len(uri) > URI_MAX or not host or parts.fragment or any(character.isspace() for character in uri) or \
+                    not (parts.scheme == 'https' or parts.scheme == 'http' and host in LOOPBACK_HOSTS):
+                raise Failure(f'{uri!r} is not an https URI, or an http URI of localhost, without a fragment and of at '
+                              f'most {URI_MAX} characters', 2)
+        found[attribute] = [uri.encode() for uri in dict.fromkeys(uris)]
+    allowed = values.get('allowed_groups')
+    if allowed is not None:
+        if not isinstance(allowed, list) or len(allowed) > CLIENT_VALUES_MAX:
+            raise Failure(f'allowed_groups must be a list of at most {CLIENT_VALUES_MAX} group names', 2)
+        for group in allowed:
+            group_entry(connection, group)
+        found['vpnRouterAllowedGroup'] = [group_dn(group).encode() for group in sorted(set(allowed))]
+    return found
+
+
+def refuse_client_settings(name, values):
+    """Refuse OpenID Provider client settings for a user who is not a service account."""
+    if any(values.get(key) is not None for key in ('redirect_uris', 'post_logout_redirect_uris', 'allowed_groups')):
+        raise Failure(f'{name} is not a service account; only a service account is a client of the OpenID Provider', 2)
+
+
 def dn_of(name):
     return f'uid={name},{vpnrouter_ldap.USERS}'
 
@@ -230,7 +309,8 @@ def internal_accounts():
 def summary(attributes):
     """A user as the answers show it; a person attribute or a label the entry does not have is None.
 
-    internal is whether it is an internal service account (internal_accounts).
+    internal is whether it is an internal service account (internal_accounts). A service account also has its OpenID
+    Provider client settings (client_settings), allowed_groups as group names.
     """
     name = attributes['uid'][0].decode()
     lock = attributes.get('pwdAccountLockedTime', [None])[0]
@@ -244,10 +324,18 @@ def summary(attributes):
         'certificate': 'userCertificate;binary' in attributes,
         'otp': 'oathTOTPToken' in attributes,
         'console': console_of(attributes),
+        'wireguard_peers': peers_of(attributes),
+        'passkeys': [{key: passkey[key] for key in ('id', 'label', 'created')} for _, passkey in passkeys_of(attributes)],
     }
     for key, attribute in PERSON + LABELS:
         values = attributes.get(attribute)
         user[key] = values[0].decode() if values else None
+    if user['service']:
+        for key, attribute in CLIENT_URIS:
+            user[key] = [value.decode() for value in attributes.get(attribute, [])]
+        suffix = f',{vpnrouter_ldap.GROUPS}'
+        user['allowed_groups'] = sorted(value.decode()[3:-len(suffix)] for value in attributes.get('vpnRouterAllowedGroup', [])
+                                        if value.decode().startswith('cn=') and value.decode().endswith(suffix))
     return user
 
 
@@ -267,6 +355,76 @@ def console_of(attributes):
     }
 
 
+def peers_of(attributes):
+    """The WireGuard peers of an entry as the answers show them: [{public_key, ips}], in the order they are stored."""
+    peers = []
+    for value in attributes.get('vpnRouterWireGuardPeer', []):
+        key, _, ips = value.decode().partition(' ')
+        peers.append({'public_key': key, 'ips': ips.split(',')})
+    return peers
+
+
+def passkeys_of(attributes):
+    """The passkeys of an entry (vpnrouter_passkeys) with their stored values: [(value, {id, credential, label,
+    created})]; values that cannot be read are left out."""
+    passkeys = []
+    for value in attributes.get('vpnRouterPasskey', []):
+        try:
+            passkey = json.loads(value)
+        except ValueError:
+            continue
+        if isinstance(passkey, dict) and all(isinstance(passkey.get(key), str) for key in ('id', 'credential', 'label', 'created')):
+            passkeys.append((value, passkey))
+    return passkeys
+
+
+def checked_peers(connection, name, peers):
+    """The values of vpnRouterWireGuardPeer for the user's WireGuard peers, [{public_key, ips}], when they are valid.
+
+    A public key is 32 bytes in base64, used by no other peer of any user; each peer has at least one IP, an IPv4
+    address or network, which no other peer of any user covers and which does not cover the router's own address of
+    wireguard.address. A user has at most WIREGUARD_PEERS_MAX peers.
+    """
+    if not isinstance(peers, list) or len(peers) > WIREGUARD_PEERS_MAX:
+        raise Failure(f'wireguard_peers must be a list of at most {WIREGUARD_PEERS_MAX} peers', 2)
+    router = vpnrouter.load_config()['wireguard']['address'].strip()
+    taken = [(other['name'], key, network)
+             for other in list_users(connection)['users'] if other['name'] != name
+             for peer in other['wireguard_peers'] for key in [peer['public_key']]
+             for network in (ipaddress.ip_network(ip) for ip in peer['ips'])]
+    values = []
+    for peer in peers:
+        key = peer.get('public_key') if isinstance(peer, dict) else None
+        ips = peer.get('ips') if isinstance(peer, dict) else None
+        try:
+            if not isinstance(key, str) or len(base64.b64decode(key.strip(), validate=True)) != 32:
+                raise ValueError
+        except ValueError:
+            raise Failure(f'{key!r} is not a WireGuard public key: 32 bytes in base64', 2)
+        key = key.strip()
+        if not isinstance(ips, list) or not ips or not all(isinstance(ip, str) for ip in ips):
+            raise Failure(f'the peer {key} needs at least one IP', 2)
+        networks = []
+        for ip in ips:
+            try:
+                network = ipaddress.ip_network(ip.strip(), strict=True)
+            except ValueError:
+                raise Failure(f'{ip!r} is not an IPv4 address or network of the peer {key}', 2)
+            if network.version != 4:
+                raise Failure(f'{ip!r} of the peer {key} is not IPv4', 2)
+            if router and ipaddress.ip_interface(router).ip in network:
+                raise Failure(f'{network} of the peer {key} covers the router\'s own address {router}', 2)
+            for owner, other_key, other in taken:
+                if other_key == key:
+                    raise Failure(f'the key {key} is a peer of {owner}', 4)
+                if network.overlaps(other):
+                    raise Failure(f'{network} of the peer {key} overlaps {other} of {owner}', 4)
+            networks.append(network)
+        taken += [(name, key, network) for network in networks]
+        values.append(f'{key} {",".join(str(network) for network in networks)}'.encode())
+    return values
+
+
 def classes(attributes):
     """The object classes of an entry, in lower case."""
     return {value.decode().lower() for value in attributes.get('objectClass', [])}
@@ -285,8 +443,8 @@ def free_uid(connection):
 
 
 def console(connection, name, enabled, account=None):
-    """Switch the console login of a member of ADMIN_GROUP on, as the local account given or, without one, as the
-    user's own posixAccount, or off.
+    """Switch the console login of a member of ADMIN_GROUP with a TOTP token on, as the local account given or, without
+    one, as the user's own posixAccount, or off.
 
     The posixAccount is added the first time and kept when the console login is switched off, so its uidNumber and the
     home it owns stay the user's. A local account must exist in the system's passwd with a uid from 1000 to below
@@ -309,6 +467,8 @@ def console(connection, name, enabled, account=None):
         raise Failure(f'{name} is a service account, which has no console', 2)
     if ADMIN_GROUP not in groups_of(connection, name):
         raise Failure(f'user {name} is not a member of {ADMIN_GROUP}', 2)
+    if 'oathTOTPToken' not in current:
+        raise Failure(f'user {name} has no TOTP token; console login needs one', 2)
     if account is not None:
         try:
             local = pwd.getpwnam(account)
@@ -376,14 +536,19 @@ def list_users(connection):
 def add(connection, name, password, values, service=False):
     """Add a user: a VPN user with its certificate when values gives all three person attributes, a Manager-only account
     with at most the e-mail address when it gives neither name, and, with service, a service account, with at most the
-    e-mail address and its labels (labels)."""
-    check_name(name)
+    e-mail address, its labels (labels) and its OpenID Provider client settings (client_settings); only a service
+    account may be named by a GUID."""
+    check_name(name, service)
     details = person(values, required=False)
     vpn_user = 'givenName' in details or 'sn' in details
     if service and vpn_user:
         raise Failure('a service account has no first or last name', 2)
+    client = {}
     if service:
         details.update({attribute: value for attribute, value in labels(values).items() if value})
+        client = {attribute: found for attribute, found in client_settings(connection, values).items() if found}
+    else:
+        refuse_client_settings(name, values)
     if vpn_user and len(details) != len(PERSON):
         raise Failure('give first_name, last_name and email for a VPN user, or at most email for a Manager-only account', 2)
     check_password(password)
@@ -398,6 +563,7 @@ def add(connection, name, password, values, service=False):
         if service:
             record['vpnRouterScope'] = [SERVICE_SCOPE.encode()]
     record.update({attribute: [value.encode()] for attribute, value in details.items()})
+    record.update(client)
     try:
         connection.add_s(dn_of(name), ldap.modlist.addModlist(record))
     except ldap.ALREADY_EXISTS:
@@ -412,7 +578,8 @@ def add(connection, name, password, values, service=False):
 
 
 def update(connection, name, values):
-    """Change the person attributes values gives; the cn follows the first and the last name.
+    """Change the person attributes values gives, the cn following the first and the last name, and of a VPN user the
+    WireGuard peers, wireguard_peers, which replace the user's peers (checked_peers).
 
     A Manager-only account has only the e-mail address, which '' removes; a service account also its labels
     (update_service).
@@ -420,7 +587,10 @@ def update(connection, name, values):
     current = entry(connection, name)
     if service(current):
         return update_service(connection, name, values)
+    refuse_client_settings(name, values)
     if manager_only(current):
+        if values.get('wireguard_peers') is not None:
+            raise Failure(f'user {name} is a Manager-only account, which has no VPN access and so no WireGuard peers', 2)
         if values.get('first_name') is not None or values.get('last_name') is not None:
             raise Failure(f'user {name} is a Manager-only account, which has no first or last name', 2)
         email = values.get('email')
@@ -433,27 +603,43 @@ def update(connection, name, values):
             connection.modify_s(dn_of(name), [(ldap.MOD_REPLACE, 'mail', [person({'email': email}, required=False)['mail'].encode()])])
         return summary(entry(connection, name))
     details = person(values, required=False)
-    if not details:
-        raise Failure('give at least one of first_name, last_name and email', 2)
-    names = {attribute: current[attribute][0].decode() for attribute in ('givenName', 'sn') if current.get(attribute)}
-    names.update({attribute: details[attribute] for attribute in ('givenName', 'sn') if attribute in details})
-    changes = [(ldap.MOD_REPLACE, attribute, [value.encode()]) for attribute, value in details.items()]
-    changes.append((ldap.MOD_REPLACE, 'cn', [common_name(names, name).encode()]))
+    peers = values.get('wireguard_peers')
+    if not details and peers is None:
+        raise Failure('give at least one of first_name, last_name, email and wireguard_peers', 2)
+    changes = []
+    if details:
+        names = {attribute: current[attribute][0].decode() for attribute in ('givenName', 'sn') if current.get(attribute)}
+        names.update({attribute: details[attribute] for attribute in ('givenName', 'sn') if attribute in details})
+        changes += [(ldap.MOD_REPLACE, attribute, [value.encode()]) for attribute, value in details.items()]
+        changes.append((ldap.MOD_REPLACE, 'cn', [common_name(names, name).encode()]))
+    if peers is not None:
+        if 'vpnrouteraccount' not in classes(current):
+            changes.append((ldap.MOD_ADD, 'objectClass', [b'vpnRouterAccount']))
+        changes.append((ldap.MOD_REPLACE, 'vpnRouterWireGuardPeer', checked_peers(connection, name, peers)))
     connection.modify_s(dn_of(name), changes)
+    if peers is not None:
+        apply_wireguard()
     return summary(entry(connection, name))
 
 
+def apply_wireguard():
+    """Have vpn-router-setup write the WireGuard peers of the users into wg0.conf, without waiting for it."""
+    subprocess.run(['systemctl', 'restart', '--no-block', 'vpn-router-setup.service'], capture_output=True)
+
+
 def update_service(connection, name, values):
-    """Change any of the e-mail address and the labels (labels) of a service account that values gives; '' removes one."""
+    """Change any of the e-mail address, the labels (labels) and the OpenID Provider client settings (client_settings) of
+    a service account that values gives; '' removes the e-mail address or a label, [] the values of a client setting."""
     if not service(entry(connection, name)):
         raise Failure(f'{name} is not a service account', 3)
     changes = [(ldap.MOD_REPLACE, attribute, [value.encode()] if value else []) for attribute, value in labels(values).items()]
+    changes += [(ldap.MOD_REPLACE, attribute, found) for attribute, found in client_settings(connection, values).items()]
     email = values.get('email')
     if email is not None:
         address = '' if isinstance(email, str) and email.strip() == '' else person({'email': email}, required=False)['mail']
         changes.append((ldap.MOD_REPLACE, 'mail', [address.encode()] if address else []))
     if not changes:
-        raise Failure('give email, display_name or description', 2)
+        raise Failure('give email, display_name, description, redirect_uris, post_logout_redirect_uris or allowed_groups', 2)
     connection.modify_s(dn_of(name), changes)
     return summary(entry(connection, name))
 
@@ -466,14 +652,22 @@ def passwd(connection, name, password):
 
 
 def disable(connection, name):
-    if entry(connection, name).get('pwdAccountLockedTime') != [LOCKED]:
+    """Lock the user out; the WireGuard peers of a disabled user are left out of wg0.conf."""
+    current = entry(connection, name)
+    if current.get('pwdAccountLockedTime') != [LOCKED]:
         connection.modify_s(dn_of(name), [(ldap.MOD_REPLACE, 'pwdAccountLockedTime', [LOCKED])])
+        if 'vpnRouterWireGuardPeer' in current:
+            apply_wireguard()
     return summary(entry(connection, name))
 
 
 def enable(connection, name):
-    if entry(connection, name).get('pwdAccountLockedTime') == [LOCKED]:
+    """Let the user in again, with the WireGuard peers."""
+    current = entry(connection, name)
+    if current.get('pwdAccountLockedTime') == [LOCKED]:
         connection.modify_s(dn_of(name), [(ldap.MOD_DELETE, 'pwdAccountLockedTime', None)])
+        if 'vpnRouterWireGuardPeer' in current:
+            apply_wireguard()
     return summary(entry(connection, name))
 
 
@@ -490,12 +684,13 @@ def unlock(connection, name):
 
 
 def login(name, password, code):
-    """Check the user's password, and the TOTP code of an enrolled user, with a bind as the user.
+    """Check the user's password, and the TOTP code of an enrolled user, with a bind as the user; a service account may be
+    named by a GUID.
 
     A wrong name, password or code, a locked or a disabled user give the same Failure, status 5.
     """
     refused = Failure('the name, the password or the code is wrong', 5)
-    if not isinstance(name, str) or not NAME.match(name) or not isinstance(password, str) or not password:
+    if not isinstance(name, str) or not (NAME.match(name) or GUID.match(name)) or not isinstance(password, str) or not password:
         raise refused
     if code is not None and code != '' and (not isinstance(code, str) or not CODE.match(code)):
         raise refused
@@ -550,13 +745,15 @@ def otp_enrol(connection, name, secret, code):
 
 
 def otp_remove(connection, name):
-    """Remove the user's TOTP token, when the user has one."""
-    if 'oathTOTPToken' in entry(connection, name):
+    """Remove the user's TOTP token, when the user has one, and end the console sessions it needed (end_sessions)."""
+    current = entry(connection, name)
+    if 'oathTOTPToken' in current:
         token = connection.search_s(dn_of(name), ldap.SCOPE_BASE, attrlist=TOKEN_ATTRIBUTES)[0][1]
         changes = [(ldap.MOD_DELETE, 'objectClass', [b'oathTOTPUser', b'oathTOTPToken']),
                    (ldap.MOD_DELETE, 'oathSecret', None)]
         changes += [(ldap.MOD_DELETE, attribute, None) for attribute in token]
         connection.modify_s(dn_of(name), changes)
+        end_sessions(current)
     return summary(entry(connection, name))
 
 
@@ -579,6 +776,8 @@ def remove(connection, name):
         raise Failure(f'the certificate cannot be revoked: {failure}', failure.status)
     connection.delete_s(dn_of(name))
     end_sessions(current)
+    if 'vpnRouterWireGuardPeer' in current:
+        apply_wireguard()
     return {'name': name, 'removed': True}
 
 
@@ -614,6 +813,80 @@ def profile(connection, name):
     return {'name': name, 'profile': text}
 
 
+def apple_profile(connection, name, password):
+    """The Apple configuration profile (.mobileconfig, unsigned) of the user's IKEv2 access: the root CA and
+    the P2S CA, the user's certificate and key as a PKCS#12 encrypted with the password, and the VPN.
+
+    The connection matches road-warrior.conf: the router's wan.local_fqdn as address and identity, the user name, a
+    DNS name of the certificate, as the local identity, the certificate over EAP-TLS, and AES-256, SHA2-256 and group 14
+    for IKE and ESP. With p2s.dns_domains, the device resolves those domains with the router's resolver. The PKCS#12 uses 3DES and SHA-1, the only encryption Apple's clients read; they ask for the
+    password when the profile is installed.
+    """
+    entry(connection, name)
+    if not isinstance(password, str) or not PASSWORD_MIN <= len(password) <= PASSWORD_MAX:
+        raise Failure(f'the password of the profile must have {PASSWORD_MIN} to {PASSWORD_MAX} characters', 2)
+    cfg = vpnrouter.load_config()
+    fqdn = cfg['wan']['local_fqdn'].strip()
+    if not cfg['p2s']['enabled'] or not fqdn:
+        raise Failure('IKEv2 access is not enabled', 2)
+    credentials = vpnrouter_pki.user_credentials(name)
+    if credentials is None:
+        raise Failure(f'user {name} has no certificate')
+    try:
+        chain = x509.load_pem_x509_certificates(vpnrouter_pki.bundle('p2s')['pem'].encode())
+    except vpnrouter_pki.Failure as failure:
+        raise Failure(str(failure), 4)
+    cert = x509.load_pem_x509_certificate(credentials[0])
+    key = serialization.load_pem_private_key(credentials[1], password=None)
+    encryption = (serialization.PrivateFormat.PKCS12.encryption_builder().kdf_rounds(2048)
+                  .key_cert_algorithm(pkcs12.PBES.PBESv1SHA1And3KeyTripleDESCBC).hmac_hash(hashes.SHA1())
+                  .build(password.encode()))
+    bundle = pkcs12.serialize_key_and_certificates(name.encode(), key, cert, None, encryption)
+    certificate_type = ('RSA' if isinstance(key, rsa.RSAPrivateKey)
+                        else 'ECDSA384' if isinstance(key, ec.EllipticCurvePrivateKey) and key.curve.key_size == 384
+                        else 'ECDSA256')
+    identifier = f'{".".join(reversed(fqdn.split(".")))}.vpn-router.{name}'
+    ids = {kind: str(uuid.uuid5(uuid.NAMESPACE_URL, f'{identifier}.{kind}')) for kind in ('profile', 'pkcs12', 'vpn')}
+    proposal = {'EncryptionAlgorithm': 'AES-256', 'IntegrityAlgorithm': 'SHA2-256', 'DiffieHellmanGroup': 14,
+                'LifeTimeInMinutes': 60}
+    payloads = [{'PayloadType': 'com.apple.security.root' if index == len(chain) - 1 else 'com.apple.security.pkcs1',
+                 'PayloadVersion': 1, 'PayloadIdentifier': f'{identifier}.ca{index}',
+                 'PayloadUUID': str(uuid.uuid5(uuid.NAMESPACE_URL, f'{identifier}.ca{index}')),
+                 'PayloadDisplayName': vpnrouter_pki.common_name(item),
+                 'PayloadContent': item.public_bytes(serialization.Encoding.DER)}
+                for index, item in enumerate(chain)]
+    payloads.append({'PayloadType': 'com.apple.security.pkcs12', 'PayloadVersion': 1,
+                     'PayloadIdentifier': f'{identifier}.pkcs12', 'PayloadUUID': ids['pkcs12'],
+                     'PayloadDisplayName': f'{name} ({fqdn})', 'PayloadContent': bundle})
+    # The router's resolver, which setup records, answers the names of p2s.dns_domains; the others stay with the device's.
+    try:
+        servers = json.loads(vpnrouter.WEB_STATE.read_text(encoding='utf-8'))['network']['client_dns']
+    except (OSError, ValueError, KeyError, TypeError):
+        servers = []
+    domains = [item.strip() for item in cfg['p2s']['dns_domains'] if item.strip()]
+    dns = {'DNS': {'ServerAddresses': servers, 'SupplementalMatchDomains': domains}} if servers and domains else {}
+    payloads.append({
+        **dns,
+        'PayloadType': 'com.apple.vpn.managed', 'PayloadVersion': 1, 'PayloadIdentifier': f'{identifier}.vpn',
+        'PayloadUUID': ids['vpn'], 'PayloadDisplayName': f'VPN Router {fqdn}', 'UserDefinedName': f'VPN Router {fqdn}',
+        'VPNType': 'IKEv2',
+        'IKEv2': {
+            'RemoteAddress': fqdn, 'RemoteIdentifier': fqdn, 'LocalIdentifier': name,
+            'AuthenticationMethod': 'Certificate', 'ExtendedAuthEnabled': 1, 'PayloadCertificateUUID': ids['pkcs12'],
+            'CertificateType': certificate_type,
+            'ServerCertificateIssuerCommonName': vpnrouter_pki.common_name(chain[0]), 'ServerCertificateCommonName': fqdn,
+            'IKESecurityAssociationParameters': {**proposal, 'LifeTimeInMinutes': 480},
+            'ChildSecurityAssociationParameters': proposal,
+            'EnablePFS': 0, 'DeadPeerDetectionRate': 'Medium', 'DisableMOBIKE': 0, 'DisableRedirect': 0,
+        },
+    })
+    document = {'PayloadType': 'Configuration', 'PayloadVersion': 1, 'PayloadIdentifier': identifier,
+                'PayloadUUID': ids['profile'], 'PayloadDisplayName': f'VPN Router {fqdn} ({name})',
+                'PayloadDescription': f'IKEv2 access of {name} to {fqdn}', 'PayloadRemovalDisallowed': False,
+                'PayloadContent': payloads}
+    return {'name': name, 'profile': plistlib.dumps(document).decode()}
+
+
 def group_dn(name):
     return f'cn={name},{vpnrouter_ldap.GROUPS}'
 
@@ -670,6 +943,13 @@ def groups_of(connection, name):
     return {attributes['cn'][0].decode(): member_names(attributes) for _, attributes in found}
 
 
+def allowing(connection, name):
+    """The names of the OpenID Provider's clients whose allowed groups have the group, sorted."""
+    found = connection.search_s(vpnrouter_ldap.USERS, ldap.SCOPE_ONELEVEL,
+                                f'(vpnRouterAllowedGroup={ldap.filter.escape_filter_chars(group_dn(name))})', ['uid'])
+    return sorted(attributes['uid'][0].decode() for _, attributes in found)
+
+
 def list_groups(connection):
     found = connection.search_s(vpnrouter_ldap.GROUPS, ldap.SCOPE_ONELEVEL, '(objectClass=groupOfNames)', GROUP_ATTRIBUTES)
     return {'groups': sorted((group_summary(attributes) for _, attributes in found), key=lambda group: group['name'])}
@@ -696,7 +976,9 @@ def group_add(connection, name, description, members):
 
 def group_update(connection, name, new_name=None, description=None):
     """Rename the group or change its description ('' removes it); at least one must be given. Renaming ADMIN_GROUP
-    switches the console login of its members off."""
+    switches the console login of its members off; renaming a group a client of the OpenID Provider allows renames it
+    there, and renaming the editors group of web sites renames it in the sites."""
+    import vpnrouter_sites
     if new_name is None and description is None:
         raise Failure('give a new name or a description', 2)
     members = member_names(group_entry(connection, name))
@@ -711,6 +993,13 @@ def group_update(connection, name, new_name=None, description=None):
             connection.rename_s(group_dn(name), f'cn={new_name}', delold=1)
         except ldap.ALREADY_EXISTS:
             raise Failure(f'group {new_name} exists', 4)
+        for client in allowing(connection, name):
+            connection.modify_s(dn_of(client), [(ldap.MOD_DELETE, 'vpnRouterAllowedGroup', [group_dn(name).encode()]),
+                                                (ldap.MOD_ADD, 'vpnRouterAllowedGroup', [group_dn(new_name).encode()])])
+        try:
+            vpnrouter_sites.rename_group(name, new_name)
+        except vpnrouter_sites.DatabaseError as exc:
+            raise Failure(f'group {name} is renamed {new_name}, but not in the web sites: {exc}')
         if name == ADMIN_GROUP:
             console_off(connection, members)
         name = new_name
@@ -718,8 +1007,19 @@ def group_update(connection, name, new_name=None, description=None):
 
 
 def group_remove(connection, name):
-    """Remove the group; removing ADMIN_GROUP switches the console login of its members off."""
+    """Remove the group, unless a client of the OpenID Provider allows it or it is the editors group of web sites;
+    removing ADMIN_GROUP switches the console login of its members off."""
+    import vpnrouter_sites
     members = member_names(group_entry(connection, name))
+    clients = allowing(connection, name)
+    if clients:
+        raise Failure(f'group {name} is an allowed group of the clients {", ".join(clients)}; take it out of them first', 2)
+    try:
+        sites = vpnrouter_sites.sites_of_group(name)
+    except vpnrouter_sites.DatabaseError as exc:
+        raise Failure(f'the web sites cannot be read: {exc}')
+    if sites:
+        raise Failure(f'group {name} is the editors group of the web sites {", ".join(sites)}; change them first', 2)
     connection.delete_s(group_dn(name))
     if name == ADMIN_GROUP:
         console_off(connection, members)

debian-package/src/usr/lib/vpn-router/vpnrouter_web/__init__.py

@@ -0,0 +1,101 @@
+"""The router's web service, run by vpn-router-web.service; the entry point is /usr/lib/vpn-router/web.
+
+Pages:
+  /        the status for people: plain text for curl and wget, a styled page
+           (Tailwind CSS from a CDN) for a browser
+  /status  the status as JSON
+  /status/full
+           the whole status as JSON, whatever web.status_content says, for the Router Manager
+  /config  the configuration without its secrets, and what the router resolved and
+           runs, with the installed Caddy and where it comes from, as JSON
+  /users   the users in the router's directory, whether or not a P2S system is enabled: list,
+           add, change, set the password, disable, enable, remove, the OpenVPN client
+           profile, and TOTP enrolment (see users()); service accounts are not among them
+  /service-accounts
+           the service accounts: list, add, change the e-mail address, set the password,
+           disable, enable, unlock and remove; the internal ones are only listed (see
+           service_accounts())
+  /groups  the groups of the router's directory: list, add, rename or describe, remove, and
+           add and take out members (see groups())
+  /account the account of the signed-in user: its details, its password, its TOTP
+           enrolment and its passkeys (see account())
+  /site-to-site
+           the site-to-site connections of the configuration: list, add, change and remove,
+           applied by vpn-router-setup (see site_to_site())
+  /backup  the backup settings, the last run and the local archives: show, change and run
+           now (see backup())
+  /remote-access
+           the settings of IKEv2, OpenVPN and WireGuard access and whether each
+           runs: show and change, applied by vpn-router-setup (see remote_access())
+  /ca      the PKI: its settings, the root and issuing CAs, the certificates issued; change the
+           settings, issue and revoke certificates, and take the certificate of an issuing CA
+           and a root CRL signed offline (see ca())
+  /pki/<name>.crt, /pki/<name>.crl
+           the DER certificate and CRL of the root (root) and of each issuing CA, which the
+           certificates name in their AIA and CRL distribution points; no authentication
+  /shell   while web.shell is true, a login shell of the user's console account on a terminal, for
+           a member of admins whose console login is on and who has a TOTP token: POST signs the user in again, unless
+           the user used a shell within web.shell_auth_timeout minutes, for a one-time ticket
+           (see shell_ticket()), GET with it is a WebSocket
+           that carries the terminal (see Handler.shell()); /shell/editor/<session>/<id> reads, saves and
+           closes a file the shell opened with vpn-router-editor (vre) over EDITOR_SOCKET (see
+           shell_editor() and editor_request())
+  /auth   sign-in with a user's password and TOTP code or with a passkey, refresh and sign-out
+           (see auth())
+  /metrics/history
+           the metrics the metrics service keeps, for a view: hour, day, month or year (see
+           metrics_history())
+  /metrics/settings
+           the settings of the metrics service: show and change, applied by vpn-router-setup (see
+           metrics_settings())
+  /logs   the last lines of the journal of the router's units and of the files web.log_files lists
+           (see logs())
+  /sites   the web sites Caddy serves: the settings of sites, list, add, change and remove (see sites()),
+           and the files of each: list, download, upload, extract a zip archive, create a folder, rename and
+           remove (see Handler.site_files()); a member of a site's editors group may use the site's files
+  /dns     the primary name server of the router's domains: its settings, and the domains: add, change and
+           remove, each with its secondaries, the records it serves, and its manual records (see dns())
+  /postgresql
+           the databases of each PostgreSQL cluster on the router with their sizes, as JSON (see
+           postgresql_databases()); /config has the clusters' settings
+  /.well-known/openid-configuration, /oidc/...
+           while oidc.enabled is true, the OpenID Provider (vpnrouter_oidc), answered only on the
+           loopback address, where Caddy passes the requests of the HTTPS site; POST /oidc/login counts
+           towards the limit of /auth calls
+
+/status/full, /config, /metrics/history, /metrics/settings, /postgresql, /users, /service-accounts, /groups, /site-to-site, /backup, /remote-access, /ca, /logs, /sites, /dns, /shell and /account need an HS256 JWT in an Authorization: Bearer header signed
+with vpnrouter_auth.WEB_KEY (see vpnrouter_auth.verify). A token of /auth names a user in sub;
+/account serves that user, and the other paths need a member of vpnrouter_users.ADMIN_GROUP. A
+token of vpn-router-token has the admin claim and names no user; it may call every path but
+/account, and only such a token may change ADMIN_GROUP: create, rename to it, change, remove it,
+add or take out its members, and remove one of its members, and switch a user's console login.
+These paths and /auth are not
+served (404) while the key does not exist. /auth but its sign-out and the beginning of a passkey
+sign-in is limited to AUTH_LIMIT calls per client
+address in AUTH_WINDOW seconds; the address of a call from one of web.trusted_proxies, by
+default the address the call came in on, is the last entry of its X-Forwarded-For header.
+
+/ and /status show only the status, as much as web.status_content says (see shown): basic, the
+default, the overall status, the time and the client's address (its address as for the rate limit
+below); standard also the package version, the installed version of vpn-router-manager
+(manager_version, null when it is not installed) and the number of active and other services; full
+whether each service runs, whether Docker is installed, how many of the site-to-site connections are established
+(site_to_site: connections and established, null when swanctl cannot be asked), and IKEv2, OpenVPN
+and WireGuard. No configuration data, key or connection name is shown, and no address but the client's.
+
+Modules, one per family of paths, with what they share in common:
+  common        the paths of the configuration and of setup's state, the body limit, the HTTP statuses of the
+                errors of the router's modules, reading the configuration and the state, changing a section, log
+  status        /, /status, /status/full, /config and /postgresql, with the cache of the status
+  auth          /auth, its rate limit, and the rules of who may call a protected path (refusal)
+  identities    /users, /service-accounts, /groups and /account
+  connectivity  /site-to-site and /remote-access
+  backup        /backup
+  pki           /ca, and the files /pki/ serves
+  logs          /logs
+  sites         /sites, with the files of each site
+  dns           /dns
+  metrics       /metrics/history and /metrics/settings
+  shell         /shell, its WebSocket, and the editor of the shell with its socket
+  handler       Handler, which reads a request, checks its token and passes it to the module of its path
+"""

debian-package/src/usr/lib/vpn-router/vpnrouter_web/auth.py

@@ -0,0 +1,130 @@
+"""/auth, the sign-in, refresh and sign-out of the web service, its rate limit per client address, and the rules of
+who may call a protected path (refusal)."""
+
+import collections
+import threading
+import time
+
+import ldap
+
+import vpnrouter
+import vpnrouter_auth
+import vpnrouter_passkeys
+import vpnrouter_sites
+import vpnrouter_users
+
+from .common import USER_STATUS
+from .sites import SITE_FILES
+
+#: The calls of /auth allowed per client address in AUTH_WINDOW seconds.
+AUTH_LIMIT = 10
+
+AUTH_WINDOW = 60
+
+#: The times of the recent /auth calls of each client address.
+_auth_calls = collections.defaultdict(collections.deque)
+
+_auth_lock = threading.Lock()
+
+
+def changes_admins(connection, method, parts, body):
+    """Whether a /users, /service-accounts or /groups request creates, renames to, changes or removes ADMIN_GROUP, or
+    removes a member of it."""
+    admins = vpnrouter_users.ADMIN_GROUP
+    if parts[0] == 'groups':
+        if method == 'POST' and len(parts) == 1:
+            return body.get('name') == admins
+        if method != 'GET' and len(parts) > 1 and parts[1] == admins:
+            return True
+        return method == 'PUT' and len(parts) == 2 and body.get('name') == admins
+    if parts[0] in ('users', 'service-accounts') and method == 'DELETE' and len(parts) == 2:
+        return admins in vpnrouter_users.groups_of(connection, parts[1])
+    return False
+
+
+def refusal(claims, method, path, body):
+    """Why the holder of the claims may not make the request to a protected path, or '' when it may.
+
+    The files of a site may also be read and changed by a member of the site's editors group.
+    """
+    name = claims.get('sub')
+    if path == '/account' or path.startswith('/account/'):
+        return '' if isinstance(name, str) else 'the token names no user'
+    if claims.get('admin') is True:
+        return ''
+    if not isinstance(name, str):
+        return 'the token names no user'
+    admins = vpnrouter_users.ADMIN_GROUP
+    with vpnrouter_users.session() as connection:
+        if not vpnrouter_users.is_admin(connection, name):
+            files = SITE_FILES.match(path)
+            if files and files.group(1) in vpnrouter_sites.editable(vpnrouter_users.groups_of(connection, name)):
+                return ''
+            return f'user {name} is not a member of {admins}'
+        parts = path.strip('/').split('/')
+        if changes_admins(connection, method, parts, body if isinstance(body, dict) else {}):
+            return f'only a token of vpn-router-token may change the group {admins} or remove its members'
+        if parts[0] == 'users' and len(parts) == 3 and parts[2] == 'console' and method != 'GET':
+            return 'only a token of vpn-router-token may change console login'
+    return ''
+
+
+def auth(path, body):
+    """Answer a POST to /auth with vpnrouter_users and vpnrouter_auth: the HTTP status and the JSON document.
+
+      POST /auth           sign in: {"name", "password", "code"?}; the tokens and the user's name
+      POST /auth/passkey   begin a sign-in with a passkey: {"id", "options"} for navigator.credentials.get
+      POST /auth/passkey/complete
+                           {"id", "credential"}, credential the browser's answer; the tokens and the user's name
+      POST /auth/refresh   {"refresh_token"}; new tokens, the refresh token used up
+      POST /auth/logout    {"refresh_token"}; the refresh token revoked
+    """
+    if not isinstance(body, dict):
+        return 400, {'error': 'the body must be a JSON object'}
+    try:
+        cfg = vpnrouter.load_config()
+        if path == '/auth':
+            vpnrouter_users.login(body.get('name'), body.get('password'), body.get('code'))
+            with vpnrouter_users.session() as connection:
+                if vpnrouter_users.service(vpnrouter_users.entry(connection, body['name'])):
+                    raise vpnrouter_users.Failure('the name, the password or the code is wrong', 5)
+            return 200, {**vpnrouter_auth.issue(cfg, body['name']), 'name': body['name']}
+        if path == '/auth/passkey':
+            return 200, vpnrouter_passkeys.login_begin()
+        if path == '/auth/passkey/complete':
+            with vpnrouter_users.session() as connection:
+                name = vpnrouter_passkeys.login_complete(connection, body.get('id'), body.get('credential'))
+            return 200, {**vpnrouter_auth.issue(cfg, name), 'name': name}
+        name = vpnrouter_auth.take(cfg, body.get('refresh_token'))
+        if path == '/auth/logout':
+            return 200, {'revoked': name is not None}
+        if name is None:
+            return 401, {'error': 'the refresh token is not valid'}
+        with vpnrouter_users.session() as connection:
+            user = vpnrouter_users.summary(vpnrouter_users.entry(connection, name))
+        if not user['enabled'] or user['locked']:
+            return 401, {'error': f'user {name} is disabled or locked'}
+        return 200, vpnrouter_auth.issue(cfg, name)
+    except vpnrouter_users.Failure as failure:
+        return (401 if failure.status == 3 else USER_STATUS.get(failure.status, 500)), {'error': str(failure)}
+    except (ldap.LDAPError, OSError) as exc:
+        return 500, {'error': f'the user directory failed: {exc}'}
+    except vpnrouter_auth.DatabaseError as exc:
+        return 500, {'error': str(exc)}
+    except SystemExit as exc:
+        return 500, {'error': str(exc.code)}
+
+
+def auth_wait(address):
+    """Seconds until the client address may call /auth again, 0 when it may now; a call that may is counted."""
+    now = time.monotonic()
+    with _auth_lock:
+        for idle in [key for key, times in _auth_calls.items() if times[-1] <= now - AUTH_WINDOW]:
+            del _auth_calls[idle]
+        calls = _auth_calls[address]
+        while calls and calls[0] <= now - AUTH_WINDOW:
+            calls.popleft()
+        if len(calls) >= AUTH_LIMIT:
+            return int(calls[0] + AUTH_WINDOW - now) + 1
+        calls.append(now)
+        return 0

debian-package/src/usr/lib/vpn-router/vpnrouter_web/backup.py

@@ -0,0 +1,84 @@
+"""/backup: the backup settings, the last run and the local archives, and a run now."""
+
+import configparser
+import shutil
+
+import vpnrouter
+import vpnrouter_backup
+from vpnrouter_status import run
+
+
+def backup_settings(settings):
+    """The backup section as /backup shows it: its settings but pbs_password, with pbs_password_set."""
+    return {**{option: value for option, value in settings.items() if option != 'pbs_password'},
+            'pbs_password_set': bool(settings['pbs_password'])}
+
+
+def rclone_remotes():
+    """The names of the remotes of vpnrouter_backup.RCLONE_CONFIG; [] when it cannot be read, as when it is encrypted."""
+    parser = configparser.ConfigParser(interpolation=None)
+    try:
+        parser.read(vpnrouter_backup.RCLONE_CONFIG, encoding='utf-8')
+    except (OSError, configparser.Error):
+        return []
+    return parser.sections()
+
+
+def backup(method, path, body):
+    """Answer a /backup request: the HTTP status and the JSON document.
+
+      GET  /backup      {"settings", "state", "archives", "next", "client", "rclone"}: the backup section without
+                        pbs_password, with pbs_password_set; the last run (vpnrouter_backup.state), null before the
+                        first; the local archives of this host, newest first, [{name, time, size}], [] with the pbs
+                        target; the next run of the timer as systemd shows it, null while backups are disabled;
+                        whether proxmox-backup-client is installed; and {"installed", "config", "remotes"} of rclone
+      PUT  /backup      change any of the settings of the backup section; an empty or absent pbs_password keeps the
+                        current secret
+      POST /backup/run  start a backup now, without waiting for it; 409 while one runs
+
+    A change is made as /site-to-site makes one, and applied by restarting vpn-router-setup without waiting for it.
+    """
+    if body == 'invalid' or (body is not None and not isinstance(body, dict)):
+        return 400, {'error': 'the body must be a JSON object'}
+    body = body or {}
+    if (method, path) == ('POST', '/backup/run'):
+        if vpnrouter_backup.running():
+            return 409, {'error': 'a backup is running'}
+        result = run('systemctl', 'start', '--no-block', vpnrouter_backup.UNIT)
+        if result is None or result.returncode != 0:
+            return 500, {'error': f'the backup cannot be started: {result.stderr.strip() if result else "no systemctl"}'}
+        return 202, {'started': True}
+    if (method, path) not in (('GET', '/backup'), ('PUT', '/backup')):
+        return 404, {'error': f'no route {method} {path}'}
+    try:
+        if method == 'GET':
+            settings = vpnrouter.load_config()['backup']
+            timer = run('systemctl', 'show', '-p', 'NextElapseUSecRealtime', '--value', vpnrouter_backup.TIMER)
+            next_run = timer.stdout.strip() if timer and timer.returncode == 0 else ''
+            return 200, {
+                'settings': backup_settings(settings),
+                'state': vpnrouter_backup.state() or None,
+                'archives': vpnrouter_backup.archives(settings['path']) if settings['target'] == 'local' else [],
+                'next': next_run if settings['enabled'] and next_run not in ('', 'n/a') else None,
+                'client': vpnrouter_backup.PBS_CLIENT.exists(),
+                'rclone': {'installed': shutil.which('rclone') is not None,
+                           'config': vpnrouter_backup.RCLONE_CONFIG.is_file(), 'remotes': rclone_remotes()},
+            }
+        settings = {option: body[option] for option in vpnrouter.SCHEMA['backup'] if option in body}
+        if not settings.get('pbs_password'):
+            settings.pop('pbs_password', None)
+        with vpnrouter.config_lock():
+            data = vpnrouter.read_settings()
+            current = data.get('backup')
+            data['backup'] = {**(current if isinstance(current, dict) else {}), **settings}
+            cfg = vpnrouter.with_defaults(data)
+            vpnrouter.validate(cfg)
+            vpnrouter.save_config(data)
+    except vpnrouter.ConfigError as exc:
+        return 400, {'error': str(exc)}
+    except OSError as exc:
+        return 500, {'error': f'the configuration cannot be written: {exc}'}
+    except SystemExit as exc:
+        return 500, {'error': str(exc.code)}
+    run('systemctl', 'restart', '--no-block', 'vpn-router-setup.service')
+    return 200, {'settings': backup_settings(cfg['backup'])}

debian-package/src/usr/lib/vpn-router/vpnrouter_web/common.py

@@ -0,0 +1,85 @@
+"""What the modules of the web service share: the paths of the configuration and of the state vpn-router-setup writes,
+the limit of request bodies, the HTTP statuses of the failures of the router's modules, reading the configuration and
+the state, changing a section of the configuration, the state of a unit, and the log."""
+
+import json
+import sys
+
+import vpnrouter
+import vpnrouter_auth
+from vpnrouter_status import run
+
+STATE_FILE = '/run/vpn-router/web.json'
+
+CONFIG_FILE = '/etc/vpn-router/vpn-router.json'
+
+#: The largest request body accepted, in bytes; a CSR or a certificate chain in PEM is a few kilobytes.
+BODY_LIMIT = 65536
+
+#: The HTTP status for each status of a vpnrouter_users.Failure; any other is 500.
+USER_STATUS = {2: 400, 3: 404, 4: 409, 5: 401}
+
+#: The HTTP status for each status of a vpnrouter_pki.Failure; any other is 500.
+PKI_STATUS = {2: 400, 3: 404, 4: 409}
+
+#: The HTTP status for each status of a vpnrouter_sites.Failure; any other is 500.
+SITE_STATUS = {2: 400, 3: 404, 4: 409}
+
+#: The bytes in a MiB, the unit of sites.upload_max_mb.
+MIB = 1024 * 1024
+
+
+def read_json(path):
+    """The object in a JSON file, or {} when the file is missing or holds no object."""
+    try:
+        with open(path, encoding='utf-8') as handle:
+            data = json.load(handle)
+    except (OSError, ValueError):
+        return {}
+    return data if isinstance(data, dict) else {}
+
+
+def section(configuration, name):
+    """A section of the configuration, or {} when it is missing or not an object."""
+    value = configuration.get(name)
+    return value if isinstance(value, dict) else {}
+
+
+def current():
+    """What a request needs, read now: the features and facts setup resolved, and the signing key.
+
+    Before setup has run the router has no features, and without a key the protected paths and
+    /auth are not served.
+    """
+    return dict(read_json(STATE_FILE), key=vpnrouter_auth.key())
+
+
+def unit_state(unit):
+    result = run('systemctl', 'is-active', unit)
+    return result.stdout.strip() if result and result.stdout.strip() else 'unknown'
+
+
+def section_change(name, body):
+    """Change any of the settings of the configuration's section as /backup changes its own; the section, or the HTTP
+    status and the error document as a tuple."""
+    settings = {option: body[option] for option in vpnrouter.SCHEMA[name] if option in body}
+    try:
+        with vpnrouter.config_lock():
+            data = vpnrouter.read_settings()
+            current = data.get(name)
+            data[name] = {**(current if isinstance(current, dict) else {}), **settings}
+            cfg = vpnrouter.with_defaults(data)
+            vpnrouter.validate(cfg)
+            vpnrouter.save_config(data)
+    except vpnrouter.ConfigError as exc:
+        return 400, {'error': str(exc)}
+    except OSError as exc:
+        return 500, {'error': f'the configuration cannot be written: {exc}'}
+    except SystemExit as exc:
+        return 500, {'error': str(exc.code)}
+    run('systemctl', 'restart', '--no-block', 'vpn-router-setup.service')
+    return cfg[name]
+
+
+def log(message):
+    print(f'vpn-router-web: {message}', file=sys.stderr, flush=True)

debian-package/src/usr/lib/vpn-router/vpnrouter_web/connectivity.py

@@ -0,0 +1,155 @@
+"""The connections of the router: /site-to-site and /remote-access, the IKEv2, OpenVPN and WireGuard access."""
+
+import ipaddress
+
+import vpnrouter
+from vpnrouter_status import established_each, run
+
+from .common import section
+
+#: The settings of a site_to_site connection that /site-to-site adds and changes.
+CONNECTION_SETTINGS = ('addrs', 'id', 'cidrs', 'local_cidrs', 'local_id_mode', 'auth', 'psk', 'remote_ca')
+
+#: The sections of the remote access systems /remote-access changes: IKEv2, OpenVPN and WireGuard.
+REMOTE_ACCESS = ('p2s', 'openvpn', 'wireguard')
+
+
+def connection_of(name, connection, count):
+    """A site_to_site connection as /site-to-site shows it: its settings but psk, psk_set and established.
+
+    count is the number of its established IKE SAs, None when it is not known.
+    """
+    return {'name': name, **{option: value for option, value in connection.items() if option != 'psk'},
+            'psk_set': bool(connection['psk']), 'established': None if count is None else count > 0}
+
+
+def site_to_site(method, path, body):
+    """Answer a /site-to-site request: the HTTP status and the JSON document.
+
+      GET    /site-to-site          the connections, {"connections": [...]}: each with its settings but psk, with
+                                    psk_set, whether psk holds a key, and established, whether its tunnel is up,
+                                    null when swanctl cannot be asked
+      POST   /site-to-site          add a connection: {"name", "addrs", "id", "cidrs", "local_cidrs", "local_id_mode",
+                                    "auth", "psk", "remote_ca"}; psk is required with auth psk, the default, and an
+                                    existing name is 409
+      PUT    /site-to-site/<name>   change any of the settings of POST but name; an empty or absent psk keeps the
+                                    current key, and a psk given replaces psk_file
+      DELETE /site-to-site/<name>   remove the connection
+
+    A change is made holding vpnrouter.config_lock, checked as vpn-router-setup checks the configuration (400 with
+    the reason), written with vpnrouter.save_config, and applied by restarting vpn-router-setup without waiting for it.
+    """
+    if body == 'invalid' or (body is not None and not isinstance(body, dict)):
+        return 400, {'error': 'the body must be a JSON object'}
+    body = body or {}
+    parts = path.strip('/').split('/')
+    name = parts[1] if len(parts) == 2 else None
+    if (method, len(parts)) not in (('GET', 1), ('POST', 1), ('PUT', 2), ('DELETE', 2)):
+        return 404, {'error': f'no route {method} {path}'}
+    try:
+        if method == 'GET':
+            connections = vpnrouter.load_config()['site_to_site']
+            counts = established_each(connections)
+            return 200, {'connections': [connection_of(key, value, counts[key]) for key, value in connections.items()]}
+        settings = {option: body[option] for option in CONNECTION_SETTINGS if option in body}
+        with vpnrouter.config_lock():
+            data = vpnrouter.read_settings()
+            connections = data.setdefault('site_to_site', {})
+            if method == 'POST':
+                name = body.get('name')
+                if not isinstance(name, str) or not name:
+                    return 400, {'error': 'name is required'}
+                if name in connections:
+                    return 409, {'error': f'connection {name} exists'}
+                if settings.get('auth', 'psk') == 'psk' and (not isinstance(settings.get('psk'), str) or not settings['psk']):
+                    return 400, {'error': 'psk is required with auth psk'}
+                connections[name] = settings
+            elif name not in connections:
+                return 404, {'error': f'no connection {name}'}
+            elif method == 'PUT':
+                connection = dict(connections[name]) if isinstance(connections[name], dict) else {}
+                if settings.get('psk'):
+                    connection.pop('psk_file', None)
+                else:
+                    settings.pop('psk', None)
+                connections[name] = {**connection, **settings}
+            else:
+                del connections[name]
+            cfg = vpnrouter.with_defaults(data)
+            vpnrouter.validate(cfg)
+            vpnrouter.save_config(data)
+    except vpnrouter.ConfigError as exc:
+        return 400, {'error': str(exc)}
+    except OSError as exc:
+        return 500, {'error': f'the configuration cannot be written: {exc}'}
+    except SystemExit as exc:
+        return 500, {'error': str(exc.code)}
+    run('systemctl', 'restart', '--no-block', 'vpn-router-setup.service')
+    if method == 'DELETE':
+        return 200, {'name': name, 'removed': True}
+    return (201 if method == 'POST' else 200), connection_of(name, cfg['site_to_site'][name], None)
+
+
+def wireguard_server(cfg, state):
+    """What a WireGuard peer's configuration needs of the router: {public_key, endpoint, allowed_ips, dns}; public_key is
+    null before setup made the key pair, endpoint, <wan.local_fqdn>:<wireguard.listen_port>, null without a name,
+    allowed_ips the networks reached through the tunnel, the router's local CIDRs and the WireGuard network, and dns the
+    addresses of the remote access clients' resolver, [] while it does not run."""
+    try:
+        public_key = vpnrouter.WG_PUBLIC_KEY.read_text(encoding='utf-8').strip() or None
+    except OSError:
+        public_key = None
+    fqdn = cfg['wan']['local_fqdn'].strip()
+    address = cfg['wireguard']['address'].strip()
+    networks = section(state, 'network').get('local_cidrs')
+    allowed = [cidr for cidr in networks if isinstance(cidr, str)] if isinstance(networks, list) else []
+    if address:
+        allowed.append(str(ipaddress.ip_interface(address).network))
+    dns = section(state, 'network').get('client_dns')
+    return {'public_key': public_key, 'endpoint': f'{fqdn}:{cfg["wireguard"]["listen_port"]}' if fqdn else None,
+            'allowed_ips': list(dict.fromkeys(allowed)),
+            'dns': [address for address in dns if isinstance(address, str)] if isinstance(dns, list) else []}
+
+
+def remote_access(state, method, path, body):
+    """Answer a /remote-access request: the HTTP status and the JSON document.
+
+      GET /remote-access            {"p2s", "openvpn", "wireguard", "running", "local_fqdn", "wireguard_server"}: the
+                                    settings of the three remote access systems (REMOTE_ACCESS), whether setup runs
+                                    each (running: {p2s, openvpn, wireguard}), wan.local_fqdn, which IKEv2 and OpenVPN
+                                    need with the router's VPN server certificate, and what a WireGuard peer's
+                                    configuration needs of the router (wireguard_server)
+      PUT /remote-access/<system>   change any of the settings of the system's section; answers the section
+
+    A change is made as /site-to-site makes one, and applied by restarting vpn-router-setup without waiting for it.
+    """
+    if body == 'invalid' or (body is not None and not isinstance(body, dict)):
+        return 400, {'error': 'the body must be a JSON object'}
+    body = body or {}
+    parts = path.strip('/').split('/')
+    try:
+        if (method, len(parts)) == ('GET', 1):
+            cfg = vpnrouter.load_config()
+            return 200, {**{system: cfg[system] for system in REMOTE_ACCESS},
+                         'running': {system: bool(state.get(system)) for system in REMOTE_ACCESS},
+                         'local_fqdn': cfg['wan']['local_fqdn'],
+                         'wireguard_server': wireguard_server(cfg, state)}
+        if method != 'PUT' or len(parts) != 2 or parts[1] not in REMOTE_ACCESS:
+            return 404, {'error': f'no route {method} {path}'}
+        system = parts[1]
+        settings = {option: body[option] for option in vpnrouter.SCHEMA[system] if option in body}
+        with vpnrouter.config_lock():
+            data = vpnrouter.read_settings()
+            current = data.get(system)
+            data[system] = {**(current if isinstance(current, dict) else {}), **settings}
+            cfg = vpnrouter.with_defaults(data)
+            vpnrouter.validate(cfg)
+            vpnrouter.save_config(data)
+    except vpnrouter.ConfigError as exc:
+        return 400, {'error': str(exc)}
+    except OSError as exc:
+        return 500, {'error': f'the configuration cannot be written: {exc}'}
+    except SystemExit as exc:
+        return 500, {'error': str(exc.code)}
+    run('systemctl', 'restart', '--no-block', 'vpn-router-setup.service')
+    return 200, cfg[system]

debian-package/src/usr/lib/vpn-router/vpnrouter_web/dns.py

@@ -0,0 +1,81 @@
+"""/dns: the primary name server of the router's domains."""
+
+import vpnrouter
+import vpnrouter_dns
+from vpnrouter_status import run
+
+from .common import section_change, unit_state
+
+
+def dns(method, path, query, body):
+    """Answer a /dns request with vpnrouter_dns: the HTTP status and the JSON document.
+
+      GET    /dns           {"settings", "installed", "running", "domains", "problem"}: the dns section of the
+                            configuration, whether PowerDNS is installed and runs, the domains, each {"name", "sites",
+                            "ttl", "secondaries", "manual", "records"} with its secondaries {"nameserver", "address"},
+                            its manual records and the records the name server serves, and why the domains cannot be
+                            read, null when they can
+      PUT    /dns           change any of the settings of the dns section
+      POST   /dns/domains   add a domain: {"name", "sites"?, "ttl"?}; sites gives the host names of the enabled sites
+                            in it records; ttl is dns.ttl when null or absent; an existing name is 409
+      PUT    /dns/domains/<domain>
+                            change "sites" or "ttl" of the domain
+      DELETE /dns/domains/<domain>
+                            remove the domain with its secondaries and manual records
+      POST   /dns/domains/<domain>/secondaries
+                            add a secondary name server of the domain, or change its address: {"nameserver", "address"}
+      DELETE /dns/domains/<domain>/secondaries/<nameserver>
+                            remove the secondary name server
+      POST   /dns/domains/<domain>/records
+                            add a manual record: {"name", "type", "content", "ttl"?}; name is relative to the domain,
+                            @ for the domain itself, or absolute with a final dot; ttl is the domain's without it
+      DELETE /dns/domains/<domain>/records
+                            remove the manual records of name= and type=, with content= only that one
+
+    A change is applied by restarting vpn-router-setup without waiting for it.
+    """
+    if body == 'invalid' or (body is not None and not isinstance(body, dict)):
+        return 400, {'error': 'the body must be a JSON object'}
+    body = body or {}
+    parts = path.strip('/').split('/')
+    route = (method, *parts[:2], *parts[3:4])
+    try:
+        cfg = vpnrouter.load_config()
+        if route == ('GET', 'dns'):
+            domains, problem = [], None
+            try:
+                domains = vpnrouter_dns.listing()
+            except vpnrouter_dns.DatabaseError as exc:
+                problem = str(exc)
+            return 200, {'settings': cfg['dns'], 'installed': vpnrouter_dns.PDNS_SERVER.exists(),
+                         'running': unit_state(vpnrouter_dns.UNIT) == 'active', 'domains': domains,
+                         'problem': problem}
+        if route == ('PUT', 'dns'):
+            changed = section_change('dns', body)
+            return changed if isinstance(changed, tuple) else (200, {'settings': changed})
+        if route == ('POST', 'dns', 'domains') and len(parts) == 2:
+            document, code = vpnrouter_dns.domain_add(body), 201
+        elif route == ('PUT', 'dns', 'domains') and len(parts) == 3:
+            document, code = vpnrouter_dns.domain_change(parts[2], body), 200
+        elif route == ('DELETE', 'dns', 'domains') and len(parts) == 3:
+            document, code = vpnrouter_dns.domain_remove(parts[2]), 200
+        elif route == ('POST', 'dns', 'domains', 'secondaries') and len(parts) == 4:
+            document, code = vpnrouter_dns.secondary_add(parts[2], body), 201
+        elif route == ('DELETE', 'dns', 'domains', 'secondaries') and len(parts) == 5:
+            document, code = vpnrouter_dns.secondary_remove(parts[2], parts[4]), 200
+        elif route == ('POST', 'dns', 'domains', 'records') and len(parts) == 4:
+            document, code = vpnrouter_dns.add(cfg, parts[2], body), 201
+        elif route == ('DELETE', 'dns', 'domains', 'records') and len(parts) == 4:
+            content = query.get('content', [None])[0]
+            document = vpnrouter_dns.remove(parts[2], query.get('name', [''])[0], query.get('type', [''])[0], content)
+            code = 200
+        else:
+            return 404, {'error': f'no route {method} {path}'}
+    except vpnrouter_dns.Failure as failure:
+        return {3: 404, 4: 409}.get(failure.status, 400), {'error': str(failure)}
+    except vpnrouter_dns.DatabaseError as exc:
+        return 500, {'error': str(exc)}
+    except SystemExit as exc:
+        return 500, {'error': str(exc.code)}
+    run('systemctl', 'restart', '--no-block', 'vpn-router-setup.service')
+    return code, document

debian-package/src/usr/lib/vpn-router/vpnrouter_web/handler.py

@@ -0,0 +1,238 @@
+"""The request handler of the web service: it reads a request, checks its token and passes it to the module of its
+path (answer)."""
+
+import json
+import sys
+import urllib.parse
+from http.server import BaseHTTPRequestHandler
+
+import ldap
+
+import vpnrouter
+import vpnrouter_auth
+import vpnrouter_net
+import vpnrouter_oidc
+import vpnrouter_pki
+import vpnrouter_sites
+
+from .auth import auth, auth_wait, refusal
+from .backup import backup
+from .common import BODY_LIMIT, CONFIG_FILE, current, log, read_json, section
+from .connectivity import remote_access, site_to_site
+from .dns import dns
+from .identities import account, groups, service_accounts, users
+from .logs import logs
+from .metrics import metrics_history, metrics_settings
+from .pki import PUBLISHED, ca
+from .shell import EDITOR_BODY_LIMIT, shell, shell_editor, shell_ticket
+from .sites import SITE_FILES, site_files, sites
+from .status import cached, details, html_of, postgresql_databases, shown, text_of
+
+
+class Handler(BaseHTTPRequestHandler):
+    protocol_version = 'HTTP/1.1'
+
+    def claims(self, secret):
+        """The claims of the request's token signed with the secret, or None without an acceptable one."""
+        header = self.headers.get('Authorization', '')
+        return vpnrouter_auth.verify(header[7:].strip(), secret) if header.startswith('Bearer ') else None
+
+    def client(self):
+        """The client address: the last X-Forwarded-For entry when the peer is a trusted proxy, else the peer."""
+        peer = self.client_address[0]
+        trusted = section(read_json(CONFIG_FILE), 'web').get('trusted_proxies') or [self.server.server_address[0]]
+        forwarded = self.headers.get('X-Forwarded-For', '')
+        if isinstance(trusted, list) and peer in trusted and forwarded.strip():
+            return forwarded.split(',')[-1].strip()
+        return peer
+
+    def refusal(self, claims, path, payload):
+        """The HTTP status and the message that refuse a request to a protected path, or None when it may be made."""
+        try:
+            reason = refusal(claims, self.command, path, payload)
+        except (ldap.LDAPError, OSError) as exc:
+            return 500, f'the user directory failed: {exc}'
+        except vpnrouter_sites.DatabaseError as exc:
+            return 500, str(exc)
+        return (403, reason) if reason else None
+
+    def answer(self, send_body):
+        path = self.path.split('?', 1)[0]
+        extra = []
+        self.principal = None
+        # A body that is not read must not be taken for the next request.
+        if self.command not in ('GET', 'HEAD'):
+            self.close_connection = True
+        directory = next((name for name in ('users', 'service-accounts', 'groups', 'account', 'site-to-site', 'backup',
+                                            'ca', 'shell', 'remote-access', 'logs', 'sites', 'dns')
+                          if path == f'/{name}' or path.startswith(f'/{name}/')), None)
+        protected = path in ('/status/full', '/config', '/metrics/history', '/metrics/settings', '/postgresql') or \
+            directory is not None
+        signing = path in ('/auth', '/auth/passkey', '/auth/passkey/complete', '/auth/refresh', '/auth/logout')
+        oidc = (path == '/.well-known/openid-configuration' or path.startswith('/oidc/')) and \
+            self.server.server_address[0] == vpnrouter_net.LOOPBACK
+        files = SITE_FILES.match(path) if directory == 'sites' else None
+        query = urllib.parse.parse_qs(urllib.parse.urlsplit(self.path).query)
+        state = current() if protected or signing else {}
+        claims = self.claims(state['key']) if protected and state['key'] else None
+        # The body of a file upload is read as a stream, after the request is allowed.
+        payload = self.request_body(EDITOR_BODY_LIMIT if path.startswith('/shell/editor/') else BODY_LIMIT) \
+            if (protected or signing) and self.command not in ('GET', 'HEAD') and not (files and self.command == 'PUT') \
+            else None
+        if claims is not None:
+            self.principal = 'admin' if claims.get('admin') is True else claims.get('sub')
+        if (protected or signing) and not state['key']:
+            body, kind, code = b'Not found\n', 'text/plain; charset=utf-8', 404
+        elif signing and self.command != 'POST':
+            body, kind, code = b'Method not allowed\n', 'text/plain; charset=utf-8', 405
+        elif signing:
+            wait = auth_wait(self.client()) if path not in ('/auth/logout', '/auth/passkey') else 0
+            if wait:
+                code, document = 429, {'error': f'too many sign-in calls; retry in {wait} seconds'}
+                extra.append(('Retry-After', str(wait)))
+            else:
+                code, document = auth(path, payload)
+            body, kind = json.dumps(document, indent=2).encode() + b'\n', 'application/json'
+        elif protected and claims is None:
+            body, kind, code = b'Unauthorized\n', 'text/plain; charset=utf-8', 401
+            extra.append(('WWW-Authenticate', 'Bearer'))
+        elif protected and (refused := self.refusal(claims, path, payload)):
+            code, kind = refused[0], 'application/json'
+            body = json.dumps({'error': refused[1]}, indent=2).encode() + b'\n'
+        elif path == '/status/full' and self.command in ('GET', 'HEAD'):
+            document = shown(cached(), 'full', self.client())
+            body, kind, code = json.dumps(document, indent=2).encode() + b'\n', 'application/json', 200
+        elif path == '/config' and self.command in ('GET', 'HEAD'):
+            body, kind, code = json.dumps(details(state), indent=2).encode() + b'\n', 'application/json', 200
+        elif path == '/postgresql' and self.command in ('GET', 'HEAD'):
+            body, kind, code = json.dumps(postgresql_databases(), indent=2).encode() + b'\n', 'application/json', 200
+        elif path == '/metrics/history' and self.command in ('GET', 'HEAD'):
+            query = urllib.parse.parse_qs(urllib.parse.urlsplit(self.path).query)
+            code, document = metrics_history(query.get('range', ['hour'])[0])
+            body, kind = json.dumps(document).encode() + b'\n', 'application/json'
+        elif path == '/metrics/settings':
+            code, document = metrics_settings(self.command, payload)
+            body, kind = json.dumps(document, indent=2).encode() + b'\n', 'application/json'
+        elif directory == 'shell' and (path, self.command) == ('/shell', 'GET'):
+            return shell(self, claims.get('sub'))
+        elif directory == 'shell' and path.startswith('/shell/editor/'):
+            code, document = shell_editor(claims.get('sub'), self.command, path.strip('/').split('/'), payload)
+            body, kind = json.dumps(document).encode() + b'\n', 'application/json'
+        elif directory == 'shell':
+            code, document = shell_ticket(claims.get('sub'), payload) if (path, self.command) == ('/shell', 'POST') \
+                else (404, {'error': f'no route {self.command} {path}'})
+            if code != 200:
+                log(f'shell ticket of {claims.get("sub")} from {self.client()} refused: {document["error"]}')
+            body, kind = json.dumps(document, indent=2).encode() + b'\n', 'application/json'
+        elif directory == 'account':
+            code, document = account(claims['sub'], self.command, path, payload)
+            body, kind = json.dumps(document, indent=2).encode() + b'\n', 'application/json'
+        elif directory == 'site-to-site':
+            code, document = site_to_site(self.command, path, payload)
+            body, kind = json.dumps(document, indent=2).encode() + b'\n', 'application/json'
+        elif directory == 'remote-access':
+            code, document = remote_access(state, self.command, path, payload)
+            body, kind = json.dumps(document, indent=2).encode() + b'\n', 'application/json'
+        elif directory == 'backup':
+            code, document = backup(self.command, path, payload)
+            body, kind = json.dumps(document, indent=2).encode() + b'\n', 'application/json'
+        elif directory == 'ca':
+            code, document = ca(self.command, path, payload)
+            body, kind = json.dumps(document, indent=2).encode() + b'\n', 'application/json'
+        elif directory == 'logs':
+            code, document = logs(self.command, path, query)
+            body, kind = json.dumps(document).encode() + b'\n', 'application/json'
+        elif files:
+            answered = site_files(self, files.group(1), files.group(2) or '', query, payload, send_body)
+            if answered is None:
+                return
+            code, document = answered
+            body, kind = json.dumps(document, indent=2).encode() + b'\n', 'application/json'
+        elif directory == 'sites':
+            code, document = sites(self.command, path, query, payload)
+            body, kind = json.dumps(document, indent=2).encode() + b'\n', 'application/json'
+        elif directory == 'dns':
+            code, document = dns(self.command, path, query, payload)
+            body, kind = json.dumps(document, indent=2).encode() + b'\n', 'application/json'
+        elif directory == 'service-accounts':
+            code, document = service_accounts(self.command, path, payload)
+            body, kind = json.dumps(document, indent=2).encode() + b'\n', 'application/json'
+        elif directory is not None:
+            code, document = (users if directory == 'users' else groups)(state, self.command, path, payload)
+            body, kind = json.dumps(document, indent=2).encode() + b'\n', 'application/json'
+        elif oidc:
+            wait = auth_wait(self.client()) if (self.command, path) == ('POST', '/oidc/login') else 0
+            if wait:
+                code, kind = 429, 'application/json'
+                body = json.dumps({'error': f'too many sign-in calls; retry in {wait} seconds'}).encode() + b'\n'
+                extra.append(('Retry-After', str(wait)))
+            else:
+                code, kind, body, headers = vpnrouter_oidc.answer(self.command, self.path, self.headers, self.raw_body())
+                extra += headers
+        elif self.command not in ('GET', 'HEAD'):
+            body, kind, code = b'Method not allowed\n', 'text/plain; charset=utf-8', 405
+        elif path.startswith('/pki/') and vpnrouter.PKI_NAME.match(path[5:-4]) and path[-4:] in PUBLISHED and \
+                (vpnrouter_pki.PUBLISH_DIR / path[5:]).is_file():
+            body, kind, code = (vpnrouter_pki.PUBLISH_DIR / path[5:]).read_bytes(), PUBLISHED[path[-4:]], 200
+        elif path in ('/status', '/'):
+            document = shown(cached(), section(read_json(CONFIG_FILE), 'web').get('status_content'), self.client())
+            agent = self.headers.get('User-Agent', '').lower()
+            if path == '/status':
+                body, kind = json.dumps(document, indent=2).encode() + b'\n', 'application/json'
+            elif 'curl' in agent or 'wget' in agent:
+                body, kind = text_of(document).encode(), 'text/plain; charset=utf-8'
+            else:
+                body, kind = html_of(document).encode(), 'text/html; charset=utf-8'
+            code = 200
+        else:
+            body, kind, code = b'Not found\n', 'text/plain; charset=utf-8', 404
+        self.send_response(code)
+        self.send_header('Content-Type', kind)
+        self.send_header('Content-Length', str(len(body)))
+        self.send_header('Cache-Control', 'no-store')
+        for name, value in extra:
+            self.send_header(name, value)
+        self.end_headers()
+        if send_body:
+            self.wfile.write(body)
+
+    def raw_body(self):
+        """The request body's bytes, b'' without one or over BODY_LIMIT."""
+        try:
+            size = int(self.headers.get('Content-Length') or 0)
+        except ValueError:
+            return b''
+        return self.rfile.read(size) if 0 < size <= BODY_LIMIT else b''
+
+    def request_body(self, limit=BODY_LIMIT):
+        """The request body as JSON, None when there is none, or the string 'invalid', also when it is larger than
+        limit bytes."""
+        length = self.headers.get('Content-Length')
+        if not length:
+            return None
+        try:
+            size = int(length)
+            if not 0 <= size <= limit:
+                return 'invalid'
+            return json.loads(self.rfile.read(size) or b'null')
+        except ValueError:
+            return 'invalid'
+
+    def do_GET(self):
+        self.answer(True)
+
+    def do_HEAD(self):
+        self.answer(False)
+
+    def do_POST(self):
+        self.answer(True)
+
+    def do_PUT(self):
+        self.answer(True)
+
+    def do_DELETE(self):
+        self.answer(True)
+
+    def log_message(self, format, *args):
+        principal = getattr(self, 'principal', None) or '-'
+        sys.stderr.write('%s - %s [%s] %s\n' % (self.client_address[0], principal, self.log_date_time_string(), format % args))

debian-package/src/usr/lib/vpn-router/vpnrouter_web/identities.py

@@ -0,0 +1,277 @@
+"""The identities of the router's directory: /users, /service-accounts, /groups and the signed-in user's /account."""
+
+import urllib.parse
+
+import ldap
+
+import vpnrouter
+import vpnrouter_auth
+import vpnrouter_passkeys
+import vpnrouter_users
+
+from .common import USER_STATUS
+
+
+def users(state, method, path, body):
+    """Answer a /users request with vpnrouter_users: the HTTP status and the JSON document.
+
+      GET    /users                   the users, and {"enabled", "address"} of wireguard, whose network their
+                                      WireGuard peers take their addresses from
+      POST   /users                   add a user: {"name", "password", "first_name", "last_name", "email"};
+                                      without the names a Manager-only account
+      PUT    /users/<name>            change any of {"first_name", "last_name", "email", "wireguard_peers"};
+                                      wireguard_peers, [{"public_key", "ips"}], replaces the user's peers
+      PUT    /users/<name>/password   set the password: {"password": ...}
+      POST   /users/<name>/disable    lock the user out of OpenVPN
+      POST   /users/<name>/enable     let the user in again
+      POST   /users/<name>/unlock     end a lockout after failed logins
+      DELETE /users/<name>            remove the user and revoke the certificate
+      GET    /users/<name>/profile    the OpenVPN client profile
+      POST   /users/<name>/apple-profile
+                                      the Apple configuration profile of IKEv2 access: {"password"}, which
+                                      encrypts the user's key in it; {"name", "profile"}
+      POST   /users/<name>/otp       a new TOTP secret and its otpauth URI; nothing is stored
+      PUT    /users/<name>/otp        store a TOTP secret: {"secret", "code"}, code a code of the secret
+      DELETE /users/<name>/otp        remove the TOTP token
+      DELETE /users/<name>/passkeys   remove all the user's passkeys
+      PUT    /users/<name>/console    switch console login on or off: {"enabled", "account"?}, account a local account,
+                                      without which the user's own posixAccount; only a token of vpn-router-token
+
+    Service accounts are served by /service-accounts: they are not listed, and a request naming one is 404.
+    """
+    if body == 'invalid' or (body is not None and not isinstance(body, dict)):
+        return 400, {'error': 'the body must be a JSON object'}
+    body = body or {}
+    parts = path.strip('/').split('/')
+    route = (method, len(parts), parts[2] if len(parts) == 3 else None)
+    name = parts[1] if len(parts) > 1 else None
+    actions = {
+        ('GET', 1, None): lambda connection: {
+            'users': [user for user in vpnrouter_users.list_users(connection)['users'] if not user['service']],
+            'wireguard': {option: vpnrouter.load_config()['wireguard'][option] for option in ('enabled', 'address')}},
+        ('POST', 1, None): lambda connection: vpnrouter_users.add(connection, body.get('name'), body.get('password'), body),
+        ('PUT', 2, None): lambda connection: vpnrouter_users.update(connection, name, body),
+        ('PUT', 3, 'password'): lambda connection: vpnrouter_users.passwd(connection, name, body.get('password')),
+        ('POST', 3, 'disable'): lambda connection: vpnrouter_users.disable(connection, name),
+        ('POST', 3, 'enable'): lambda connection: vpnrouter_users.enable(connection, name),
+        ('POST', 3, 'unlock'): lambda connection: vpnrouter_users.unlock(connection, name),
+        ('DELETE', 2, None): lambda connection: vpnrouter_users.remove(connection, name),
+        ('GET', 3, 'profile'): lambda connection: vpnrouter_users.profile(connection, name),
+        ('POST', 3, 'apple-profile'): lambda connection: vpnrouter_users.apple_profile(connection, name,
+                                                                                       body.get('password')),
+        ('POST', 3, 'otp'): lambda connection: vpnrouter_users.otp_new(connection, name),
+        ('PUT', 3, 'otp'): lambda connection: vpnrouter_users.otp_enrol(connection, name, body.get('secret'), body.get('code')),
+        ('DELETE', 3, 'otp'): lambda connection: vpnrouter_users.otp_remove(connection, name),
+        ('DELETE', 3, 'passkeys'): lambda connection: vpnrouter_passkeys.remove(connection, name),
+        ('PUT', 3, 'console'): lambda connection: vpnrouter_users.console(connection, name, body.get('enabled'), body.get('account')),
+    }
+    # The vpnrouter_users operation of each route that may revoke refresh tokens.
+    operations = {('PUT', 3, 'password'): 'passwd', ('POST', 3, 'disable'): 'disable', ('POST', 3, 'unlock'): 'unlock',
+                  ('DELETE', 2, None): 'remove'}
+    if route not in actions:
+        return 404, {'error': f'no route {method} {path}'}
+    try:
+        with vpnrouter_users.session() as connection:
+            if name is not None and vpnrouter_users.service(vpnrouter_users.entry(connection, name)):
+                raise vpnrouter_users.Failure(f'{name} is a service account; see /service-accounts', 3)
+            document = actions[route](connection)
+        if operations.get(route) in vpnrouter_auth.REVOKING:
+            vpnrouter_auth.revoke(vpnrouter.load_config(), name)
+    except vpnrouter_users.Failure as failure:
+        return USER_STATUS.get(failure.status, 500), {'error': str(failure)}
+    except (ldap.LDAPError, OSError) as exc:
+        return 500, {'error': f'the user directory failed: {exc}'}
+    except vpnrouter_auth.DatabaseError as exc:
+        return 500, {'error': str(exc)}
+    except SystemExit as exc:
+        # vpnrouter ends with SystemExit, carrying the reason, on a configuration it cannot read.
+        return 500, {'error': str(exc.code)}
+    return (201 if route == ('POST', 1, None) else 200), document
+
+
+def oidc_settings():
+    """{"enabled", "issuer"} of the OpenID Provider, issuer null while it is disabled."""
+    cfg = vpnrouter.load_config()
+    enabled = cfg['oidc']['enabled']
+    return {'enabled': enabled, 'issuer': vpnrouter.oidc_issuer(cfg) if enabled else None}
+
+
+def service_accounts(method, path, body):
+    """Answer a /service-accounts request with vpnrouter_users: the HTTP status and the JSON document.
+
+      GET    /service-accounts                   the service accounts: {"service_accounts": [...], "oidc": {"enabled",
+                                                 "issuer"}}, issuer that of the OpenID Provider, null while it is disabled
+      POST   /service-accounts                   add one: {"name", "password", "display_name"?, "description"?, "email"?,
+                                                 "redirect_uris"?, "post_logout_redirect_uris"?, "allowed_groups"?}
+      PUT    /service-accounts/<name>            change any of {"display_name", "description", "email", "redirect_uris",
+                                                 "post_logout_redirect_uris", "allowed_groups"}; "" removes one of the
+                                                 first three, [] the values of the others
+      PUT    /service-accounts/<name>/password   set the password: {"password": ...}
+      POST   /service-accounts/<name>/disable    lock it out
+      POST   /service-accounts/<name>/enable     let it in again
+      POST   /service-accounts/<name>/unlock     end a lockout after failed logins
+      DELETE /service-accounts/<name>            remove it
+
+    A service account with redirect URIs is a client of the OpenID Provider (vpnrouter_users.client_settings). A name
+    that is not a service account is 404. The internal service accounts (vpnrouter_users.internal_accounts), which
+    the router manages, are only listed: every other request on one is refused with 403.
+    """
+    if body == 'invalid' or (body is not None and not isinstance(body, dict)):
+        return 400, {'error': 'the body must be a JSON object'}
+    body = body or {}
+    parts = path.strip('/').split('/')
+    route = (method, len(parts), parts[2] if len(parts) == 3 else None)
+    name = parts[1] if len(parts) > 1 else None
+    settings = {key: body.get(key) for key in ('email', 'display_name', 'description', 'redirect_uris',
+                                               'post_logout_redirect_uris', 'allowed_groups')}
+    actions = {
+        ('GET', 1, None): lambda connection: {
+            'service_accounts': [user for user in vpnrouter_users.list_users(connection)['users'] if user['service']],
+            'oidc': oidc_settings()},
+        ('POST', 1, None): lambda connection: vpnrouter_users.add(connection, body.get('name'), body.get('password'), settings,
+                                                                  service=True),
+        ('PUT', 2, None): lambda connection: vpnrouter_users.update_service(connection, name, settings),
+        ('PUT', 3, 'password'): lambda connection: vpnrouter_users.passwd(connection, name, body.get('password')),
+        ('POST', 3, 'disable'): lambda connection: vpnrouter_users.disable(connection, name),
+        ('POST', 3, 'enable'): lambda connection: vpnrouter_users.enable(connection, name),
+        ('POST', 3, 'unlock'): lambda connection: vpnrouter_users.unlock(connection, name),
+        ('DELETE', 2, None): lambda connection: vpnrouter_users.remove(connection, name),
+    }
+    if route not in actions:
+        return 404, {'error': f'no route {method} {path}'}
+    if name is not None and name in vpnrouter_users.internal_accounts():
+        return 403, {'error': f'{name} is an internal service account, which the router manages'}
+    try:
+        with vpnrouter_users.session() as connection:
+            if name is not None and not vpnrouter_users.service(vpnrouter_users.entry(connection, name)):
+                raise vpnrouter_users.Failure(f'{name} is not a service account', 3)
+            document = actions[route](connection)
+    except vpnrouter_users.Failure as failure:
+        return USER_STATUS.get(failure.status, 500), {'error': str(failure)}
+    except (ldap.LDAPError, OSError) as exc:
+        return 500, {'error': f'the user directory failed: {exc}'}
+    except SystemExit as exc:
+        return 500, {'error': str(exc.code)}
+    return (201 if route == ('POST', 1, None) else 200), document
+
+
+def groups(state, method, path, body):
+    """Answer a /groups request with vpnrouter_users: the HTTP status and the JSON document.
+
+      GET    /groups                          the groups with their members
+      POST   /groups                          add a group: {"name", "members": [...], "description"?}
+      PUT    /groups/<name>                   rename it or change the description: {"name"?, "description"?}
+      DELETE /groups/<name>                   remove the group; its members are kept
+      POST   /groups/<name>/members           add a member: {"user": ...}
+      DELETE /groups/<name>/members/<user>    take a member out; the last member cannot leave
+
+    An internal service account (vpnrouter_users.internal_accounts) is not put in or taken out of a group: such a
+    request is refused with 403.
+    """
+    if body == 'invalid' or (body is not None and not isinstance(body, dict)):
+        return 400, {'error': 'the body must be a JSON object'}
+    body = body or {}
+    parts = path.strip('/').split('/')
+    name = parts[1] if len(parts) > 1 else None
+    route = (method, len(parts), parts[2] if len(parts) > 2 else None)
+    members = body.get('members') if route == ('POST', 1, None) else [body.get('user')] if route == ('POST', 3, 'members') \
+        else [parts[3]] if route == ('DELETE', 4, 'members') else []
+    internal = sorted(set(vpnrouter_users.internal_accounts()).intersection(
+        member for member in (members if isinstance(members, list) else []) if isinstance(member, str)))
+    if internal:
+        return 403, {'error': f'{", ".join(internal)}: internal service accounts, which the router manages, are not group members'}
+    actions = {
+        ('GET', 1, None): lambda connection: vpnrouter_users.list_groups(connection),
+        ('POST', 1, None): lambda connection: vpnrouter_users.group_add(
+            connection, body.get('name'), body.get('description'), body.get('members')),
+        ('PUT', 2, None): lambda connection: vpnrouter_users.group_update(
+            connection, name, body.get('name'), body.get('description')),
+        ('DELETE', 2, None): lambda connection: vpnrouter_users.group_remove(connection, name),
+        ('POST', 3, 'members'): lambda connection: vpnrouter_users.group_member_add(connection, name, body.get('user')),
+        ('DELETE', 4, 'members'): lambda connection: vpnrouter_users.group_member_remove(connection, name, parts[3]),
+    }
+    if route not in actions:
+        return 404, {'error': f'no route {method} {path}'}
+    try:
+        with vpnrouter_users.session() as connection:
+            document = actions[route](connection)
+    except vpnrouter_users.Failure as failure:
+        return USER_STATUS.get(failure.status, 500), {'error': str(failure)}
+    except (ldap.LDAPError, OSError) as exc:
+        return 500, {'error': f'the user directory failed: {exc}'}
+    return (201 if route == ('POST', 1, None) else 200), document
+
+
+def account(name, method, path, body):
+    """Answer an /account request of the user named by the token with vpnrouter_users: the HTTP status and the JSON document.
+
+      GET  /account            the user, with admin, whether the user is a member of ADMIN_GROUP
+      PUT  /account/password   set the password: {"current_password", "current_code"?, "password"}
+      POST /account/otp        a new TOTP secret and its otpauth URI; nothing is stored
+      PUT  /account/otp        store a TOTP secret: {"current_password", "current_code"?, "secret", "code"},
+                               code a code of the secret
+      POST /account/passkeys   begin the registration of a passkey: {"current_password", "current_code"?};
+                               {"id", "options"} for navigator.credentials.create
+      PUT  /account/passkeys   store the passkey: {"id", "credential", "label"?}, credential the browser's answer
+      DELETE /account/passkeys/<id>
+                               remove a passkey
+      POST   /account/profile  the user's OpenVPN client profile: {"current_password", "current_code"?}; {"name",
+                               "profile"}
+      POST   /account/apple-profile
+                               the user's Apple configuration profile of IKEv2 access:
+                               {"current_password", "current_code"?, "password"}, password encrypting the user's key in
+                               it; {"name", "profile"}
+
+    A change but the removal of a passkey, and the profiles, need the current password and, for an enrolled user, a
+    current code; a wrong
+    one is 403 and counts as a failed login. A password change revokes the user's refresh tokens.
+    """
+    if body == 'invalid' or (body is not None and not isinstance(body, dict)):
+        return 400, {'error': 'the body must be a JSON object'}
+    body = body or {}
+    route = (method, path.rstrip('/'))
+    removing = method == 'DELETE' and path.startswith('/account/passkeys/') and len(path.strip('/').split('/')) == 3
+    if not removing and route not in (('GET', '/account'), ('PUT', '/account/password'), ('POST', '/account/otp'),
+                                      ('PUT', '/account/otp'), ('POST', '/account/passkeys'), ('PUT', '/account/passkeys'),
+                                      ('POST', '/account/profile'), ('POST', '/account/apple-profile')):
+        return 404, {'error': f'no route {method} {path}'}
+    try:
+        if route == ('PUT', '/account/password'):
+            vpnrouter_users.check_password(body.get('password'))
+        if route in (('PUT', '/account/password'), ('PUT', '/account/otp'), ('POST', '/account/passkeys'),
+                     ('POST', '/account/profile'), ('POST', '/account/apple-profile')):
+            vpnrouter_users.login(name, body.get('current_password'), body.get('current_code'))
+        with vpnrouter_users.session() as connection:
+            if route == ('GET', '/account'):
+                document = {**vpnrouter_users.summary(vpnrouter_users.entry(connection, name)),
+                            'admin': vpnrouter_users.is_admin(connection, name)}
+            elif route == ('PUT', '/account/password'):
+                document = vpnrouter_users.passwd(connection, name, body['password'])
+            elif route == ('POST', '/account/otp'):
+                document = vpnrouter_users.otp_new(connection, name)
+            elif route == ('POST', '/account/profile'):
+                document = vpnrouter_users.profile(connection, name)
+            elif route == ('POST', '/account/apple-profile'):
+                document = vpnrouter_users.apple_profile(connection, name, body.get('password'))
+            elif route == ('POST', '/account/passkeys'):
+                document = vpnrouter_passkeys.register_begin(connection, name)
+            elif route == ('PUT', '/account/passkeys'):
+                document = vpnrouter_passkeys.register_complete(connection, name, body.get('id'), body.get('credential'),
+                                                                body.get('label'))
+            elif removing:
+                document = vpnrouter_passkeys.remove(connection, name, urllib.parse.unquote(path.strip('/').split('/')[2]))
+            else:
+                document = vpnrouter_users.otp_enrol(connection, name, body.get('secret'), body.get('code'))
+        if route == ('PUT', '/account/password'):
+            vpnrouter_auth.revoke(vpnrouter.load_config(), name)
+    except vpnrouter_users.Failure as failure:
+        if failure.status == 5:
+            return 403, {'error': 'the current password or code is wrong'}
+        return USER_STATUS.get(failure.status, 500), {'error': str(failure)}
+    except (ldap.LDAPError, OSError) as exc:
+        return 500, {'error': f'the user directory failed: {exc}'}
+    except vpnrouter_auth.DatabaseError as exc:
+        return 500, {'error': str(exc)}
+    except SystemExit as exc:
+        return 500, {'error': str(exc.code)}
+    return 200, document

debian-package/src/usr/lib/vpn-router/vpnrouter_web/logs.py

@@ -0,0 +1,75 @@
+"""/logs: the last lines of the journal of the router's units and of the files web.log_files lists."""
+
+import os
+import subprocess
+
+import vpnrouter
+
+#: The units whose journal /logs/journal shows, besides the whole journal: the package's own and the services it runs.
+JOURNAL_UNITS = ('vpn-router-setup', 'vpn-router-web', 'vpn-router-metrics', 'vpn-router-pki', 'vpn-router-backup',
+                 'vpn-router-caddy', 'vpn-router-manager', 'caddy', 'slapd', 'nslcd', 'postgresql', 'strongswan',
+                 'wg-quick@wg0', 'openvpn-server@vpn-router', 'ssh', 'vpn-router-resolver', 'vpn-router-webdav', 'pdns')
+
+#: The most lines /logs answers, the number it answers without lines, and the most bytes it reads from the end of a file.
+LOG_LINES_MAX = 1000
+
+LOG_LINES_DEFAULT = 200
+
+LOG_BYTES_MAX = 1024 * 1024
+
+
+def tail(path, count):
+    """The last count lines of a file, read from at most LOG_BYTES_MAX bytes at its end, invalid UTF-8 replaced."""
+    with open(path, 'rb') as handle:
+        size = handle.seek(0, os.SEEK_END)
+        start = max(0, size - LOG_BYTES_MAX)
+        handle.seek(start)
+        lines = handle.read().decode('utf-8', 'replace').splitlines()
+    # A read that starts inside the file starts inside a line, which is left out.
+    return (lines[1:] if start and lines else lines)[-count:]
+
+
+def logs(method, path, query):
+    """Answer a /logs request: the HTTP status and the JSON document.
+
+      GET /logs           {"units": JOURNAL_UNITS, "files": web.log_files, "max_lines": LOG_LINES_MAX}
+      GET /logs/journal   {"lines": [...]}: the last lines of the journal, of the unit unit= names, one of
+                          JOURNAL_UNITS, or of the whole journal without it
+      GET /logs/file      {"lines": [...]}: the last lines of the file path= names, one of web.log_files
+
+    lines= is the number of lines, 1 to LOG_LINES_MAX, LOG_LINES_DEFAULT without it.
+    """
+    if method not in ('GET', 'HEAD'):
+        return 405, {'error': f'{method} is not allowed on /logs'}
+    try:
+        files = [item.strip() for item in vpnrouter.load_config()['web']['log_files'] if item.strip()]
+    except SystemExit as exc:
+        return 500, {'error': str(exc.code)}
+    if path == '/logs':
+        return 200, {'units': list(JOURNAL_UNITS), 'files': files, 'max_lines': LOG_LINES_MAX}
+    text = query.get('lines', [str(LOG_LINES_DEFAULT)])[0]
+    if not text.isdigit() or not 1 <= int(text) <= LOG_LINES_MAX:
+        return 400, {'error': f'lines must be a whole number from 1 to {LOG_LINES_MAX}'}
+    count = int(text)
+    if path == '/logs/journal':
+        unit = query.get('unit', [''])[0]
+        if unit and unit not in JOURNAL_UNITS:
+            return 404, {'error': f'{unit} is not one of the units whose journal /logs shows'}
+        try:
+            result = subprocess.run(['journalctl', '--no-pager', '--quiet', '--output=short-iso', f'--lines={count}',
+                                     *([f'--unit={unit}.service'] if unit else [])], capture_output=True, text=True,
+                                    errors='replace', timeout=30)
+        except (OSError, subprocess.TimeoutExpired) as exc:
+            return 500, {'error': f'journalctl cannot be run: {exc}'}
+        if result.returncode != 0:
+            return 500, {'error': result.stderr.strip() or f'journalctl ended with status {result.returncode}'}
+        return 200, {'lines': result.stdout.splitlines()[-count:]}
+    if path == '/logs/file':
+        name = query.get('path', [''])[0]
+        if name not in files:
+            return 404, {'error': f'{name!r} is not one of web.log_files'}
+        try:
+            return 200, {'lines': tail(name, count)}
+        except OSError as exc:
+            return (404 if isinstance(exc, FileNotFoundError) else 500), {'error': f'{name} cannot be read: {exc.strerror}'}
+    return 404, {'error': f'no route {method} {path}'}

debian-package/src/usr/lib/vpn-router/vpnrouter_web/metrics.py

@@ -0,0 +1,55 @@
+"""/metrics/history and /metrics/settings: the metrics the metrics service keeps, and its settings."""
+
+import vpnrouter
+import vpnrouter_metrics
+
+from .common import section_change
+
+
+def metrics_history(view):
+    """Answer GET /metrics/history?range=<view> with vpnrouter_metrics.history: the HTTP status and the JSON document.
+
+    view is hour, the default, day, month or year (vpnrouter_metrics.RANGES).
+    """
+    if view not in vpnrouter_metrics.RANGES:
+        return 400, {'error': f'range must be one of {", ".join(vpnrouter_metrics.RANGES)}'}
+    try:
+        with vpnrouter_metrics.database(vpnrouter.load_config()) as connection:
+            return 200, vpnrouter_metrics.history(connection, view)
+    except vpnrouter_metrics.DatabaseError as exc:
+        return 500, {'error': str(exc)}
+    except SystemExit as exc:
+        return 500, {'error': str(exc.code)}
+
+
+def metrics_shown(settings):
+    """The metrics section as /metrics/settings shows it: its settings but otlp_password, with otlp_password_set."""
+    return {**{option: value for option, value in settings.items() if option != 'otlp_password'},
+            'otlp_password_set': bool(settings['otlp_password'])}
+
+
+def metrics_settings(method, body):
+    """Answer a /metrics/settings request: the HTTP status and the JSON document.
+
+      GET /metrics/settings  {"settings"}: the metrics section without otlp_password, with otlp_password_set
+      PUT /metrics/settings  change any of the settings of the metrics section; an empty or absent otlp_password keeps
+                             the current secret, and an empty otlp_username removes it
+
+    A change is applied by restarting vpn-router-setup without waiting for it.
+    """
+    if body == 'invalid' or (body is not None and not isinstance(body, dict)):
+        return 400, {'error': 'the body must be a JSON object'}
+    if method in ('GET', 'HEAD'):
+        try:
+            return 200, {'settings': metrics_shown(vpnrouter.load_config()['metrics'])}
+        except SystemExit as exc:
+            return 500, {'error': str(exc.code)}
+    if method != 'PUT':
+        return 404, {'error': f'no route {method} /metrics/settings'}
+    body = dict(body or {})
+    if not body.get('otlp_password'):
+        body.pop('otlp_password', None)
+    if body.get('otlp_username') == '':
+        body['otlp_password'] = ''
+    changed = section_change('metrics', body)
+    return changed if isinstance(changed, tuple) else (200, {'settings': metrics_shown(changed)})

debian-package/src/usr/lib/vpn-router/vpnrouter_web/pki.py

@@ -0,0 +1,90 @@
+"""The PKI: /ca, and the certificates and CRLs /pki/ serves without authentication."""
+
+import ldap
+
+import vpnrouter
+import vpnrouter_pki
+from vpnrouter_status import run
+
+from .common import PKI_STATUS
+
+#: A file /pki/ serves: the certificate or the CRL of a CA, and its content type.
+PUBLISHED = {'.crt': 'application/pkix-cert', '.crl': 'application/pkix-crl'}
+
+
+def ca(method, path, body):
+    """Answer a /ca request with vpnrouter_pki: the HTTP status and the JSON document.
+
+      GET  /ca                                  {"settings", "templates", "extended_key_usages", "status",
+                                                "certificates"}: the pki section, the templates with the built-in
+                                                ones, the extended key usages, each {oid, builtin}, the root, the
+                                                issuing CAs, the retired CAs and the warnings (vpnrouter_pki.status),
+                                                and the certificates issued, newest first
+      PUT  /ca                                  change any of the settings of the pki section
+      POST /ca/certificates                     issue a certificate: {"ca", "template", "csr"} answers {"serial",
+                                                "certificate", "chain"}; {"ca", "template", "subject", "sans",
+                                                "password"} answers {"serial", "pfx"}, a PKCS#12 file in base64
+      POST /ca/certificates/<serial>/revoke     revoke a certificate: {"reason"?}
+      GET  /ca/bundle/<name>                    the PEM certificates a client trusts the CA with: {"name", "pem"}; for
+                                                root the root alone, for an issuing CA the issuing CA and the root
+      GET  /ca/issuing/<name>/csr               the CSR of an issuing CA that waits for the offline root, with the
+                                                openssl extensions to sign it with: {"name", "csr", "extensions"}
+      PUT  /ca/issuing/<name>/certificate       take its certificate signed by the root: {"certificate"}
+      PUT  /ca/root/crl                         take a root CRL signed offline: {"crl"}
+
+    A change of the settings is made as /site-to-site makes one; it, a revoked router certificate and an imported
+    issuing CA certificate are applied by restarting vpn-router-setup without waiting for it.
+    """
+    if body == 'invalid' or (body is not None and not isinstance(body, dict)):
+        return 400, {'error': 'the body must be a JSON object'}
+    body = body or {}
+    parts = path.strip('/').split('/')
+    route = (method, *parts[1:])
+    try:
+        cfg = vpnrouter.load_config()
+        if len(route) == 3 and route[:2] == ('GET', 'bundle'):
+            return 200, vpnrouter_pki.bundle(route[2])
+        if route == ('GET',):
+            return 200, {'settings': cfg['pki'], 'templates': vpnrouter.pki_templates(cfg),
+                         'extended_key_usages': {name: {'oid': oid, 'builtin': name in vpnrouter.EXTENDED_KEY_USAGES}
+                                                 for name, oid in vpnrouter.extended_key_usages(cfg).items()},
+                         'status': vpnrouter_pki.status(cfg), 'certificates': vpnrouter_pki.certificates()}
+        if route == ('PUT',):
+            settings = {option: body[option] for option in vpnrouter.SCHEMA['pki'] if option in body}
+            with vpnrouter.config_lock():
+                data = vpnrouter.read_settings()
+                current = data.get('pki')
+                data['pki'] = {**(current if isinstance(current, dict) else {}), **settings}
+                cfg = vpnrouter.with_defaults(data)
+                vpnrouter.validate(cfg)
+                vpnrouter.save_config(data)
+            run('systemctl', 'restart', '--no-block', 'vpn-router-setup.service')
+            return 200, {'settings': cfg['pki'], 'templates': vpnrouter.pki_templates(cfg)}
+        with vpnrouter_pki.locked():
+            if route == ('POST', 'certificates'):
+                return 201, vpnrouter_pki.issue(cfg, body.get('ca'), body.get('template'), csr=body.get('csr'),
+                                                subject=body.get('subject'), sans=body.get('sans'),
+                                                password=body.get('password'))
+            if len(route) == 4 and route[:2] == ('POST', 'certificates') and route[3] == 'revoke':
+                document = vpnrouter_pki.revoke(cfg, route[2], body.get('reason'))
+            elif len(route) == 4 and route[:2] == ('GET', 'issuing') and route[3] == 'csr':
+                return 200, vpnrouter_pki.csr(cfg, route[2])
+            elif len(route) == 4 and route[:2] == ('PUT', 'issuing') and route[3] == 'certificate':
+                document = vpnrouter_pki.import_ca(cfg, route[2], body.get('certificate'))
+            elif route == ('PUT', 'root', 'crl'):
+                return 200, vpnrouter_pki.import_root_crl(body.get('crl'))
+            else:
+                return 404, {'error': f'no route {method} {path}'}
+    except vpnrouter.ConfigError as exc:
+        return 400, {'error': str(exc)}
+    except vpnrouter_pki.Failure as failure:
+        return PKI_STATUS.get(failure.status, 500), {'error': str(failure)}
+    except ldap.LDAPError as exc:
+        return 500, {'error': f'the directory, which holds the PKI, failed: {exc}'}
+    except OSError as exc:
+        return 500, {'error': f'the PKI cannot be changed: {exc}'}
+    except SystemExit as exc:
+        return 500, {'error': str(exc.code)}
+    if route[1] == 'issuing' or document.get('reissue'):
+        run('systemctl', 'restart', '--no-block', 'vpn-router-setup.service')
+    return 200, document

debian-package/src/usr/lib/vpn-router/vpnrouter_web/shell.py

@@ -0,0 +1,468 @@
+"""/shell: the ticket, the WebSocket of the terminal (shell), and the editor of the shell: the socket vpn-router-editor
+names files on (editor_listen) and /shell/editor/... (shell_editor)."""
+
+import base64
+import fcntl
+import hashlib
+import json
+import os
+import pwd
+import secrets
+import select
+import socket
+import struct
+import subprocess
+import termios
+import threading
+import time
+import urllib.parse
+
+import ldap
+
+import vpnrouter
+import vpnrouter_users
+from vpnrouter_status import run
+
+from .common import BODY_LIMIT, MIB, USER_STATUS, log
+
+#: Seconds a ticket of POST /shell may open a shell.
+SHELL_TICKET_SECONDS = 30
+
+#: Seconds between the checks of an open shell's user, which end the shell once its console is refused.
+SHELL_CHECK_SECONDS = 60
+
+#: The largest WebSocket message accepted from a client, in bytes.
+MESSAGE_LIMIT = 65536
+
+#: The socket vpn-router-editor (vre) names files on to open them in the editor of a shell (see editor_listen()).
+EDITOR_SOCKET = '/run/vpn-router/editor.sock'
+
+#: The helper that reads and writes a file of the editor as the shell's user.
+EDITOR_FILE = '/usr/lib/vpn-router/editor-file'
+
+#: The largest file the editor opens, in bytes, as editor-file allows; a body of PUT /shell/editor/... may hold its
+#: content escaped in JSON.
+EDITOR_MAX_BYTES = MIB
+
+EDITOR_BODY_LIMIT = 2 * EDITOR_MAX_BYTES + BODY_LIMIT
+
+#: The most files a shell has open in its editor at once.
+EDITOR_FILES_MAX = 20
+
+#: Seconds a reader of the editor socket and a run of editor-file may take.
+EDITOR_TIMEOUT = 30
+
+#: The GUID of RFC 6455 that the Sec-WebSocket-Accept of a handshake is made with.
+WEBSOCKET_GUID = '258EAFA5-E914-47DA-95CA-C5AB0DC85B11'
+
+#: WebSocket opcodes.
+TEXT, BINARY, CLOSE, PING, PONG = 1, 2, 8, 9, 10
+
+#: The unused tickets of POST /shell: ticket -> (user, monotonic time of expiry).
+_shell_tickets = {}
+
+_shell_lock = threading.Lock()
+
+#: The last use of a shell of each user, a sign-in of POST /shell or a keystroke: user -> monotonic time.
+_shell_used = {}
+
+#: The open shells by their session, which each shell has in VPN_ROUTER_SHELL: session -> {"user", "account", "uid",
+#: "send", the function that sends a WebSocket frame to its client, "files": {file id: path}}.
+_shell_sessions = {}
+
+
+def shell_ticket(name, body):
+    """Answer POST /shell: the HTTP status and the JSON document.
+
+    The user named by the token signs in again with {"password", "code"?}; a wrong password or code is 403 and counts
+    as a failed login. Without a password, the user is not asked to sign in while its last use of a shell (see
+    _shell_used) is less than web.shell_auth_timeout minutes ago. The answer is {"ticket", "expires_in"}: a ticket that
+    opens one shell (GET /shell) for the same user within SHELL_TICKET_SECONDS, or a null ticket when the user must
+    sign in. 403 while web.shell is false, the user's console login is not on or the user has no TOTP token.
+    """
+    if not isinstance(name, str):
+        return 403, {'error': 'the shell needs a token of a signed-in user'}
+    if not isinstance(body, dict):
+        return 400, {'error': 'the body must be a JSON object'}
+    try:
+        options = vpnrouter.load_config()['web']
+        if not options['shell']:
+            return 403, {'error': 'the shell is disabled; vpn-config-edit set web.shell true enables it'}
+        refusal = console_account(name)[1]
+        if refusal:
+            return 403, {'error': refusal}
+        if 'password' not in body:
+            with _shell_lock:
+                used = _shell_used.get(name)
+            if used is None or time.monotonic() - used >= options['shell_auth_timeout'] * 60:
+                return 200, {'ticket': None, 'expires_in': 0}
+        else:
+            vpnrouter_users.login(name, body.get('password'), body.get('code'))
+    except vpnrouter_users.Failure as failure:
+        if failure.status == 5:
+            return 403, {'error': 'the password or the code is wrong'}
+        return USER_STATUS.get(failure.status, 500), {'error': str(failure)}
+    except (ldap.LDAPError, OSError) as exc:
+        return 500, {'error': f'the user directory failed: {exc}'}
+    except SystemExit as exc:
+        return 500, {'error': str(exc.code)}
+    ticket = secrets.token_urlsafe(32)
+    now = time.monotonic()
+    with _shell_lock:
+        for unused in [key for key, (_, expires) in _shell_tickets.items() if expires <= now]:
+            del _shell_tickets[unused]
+        _shell_tickets[ticket] = (name, now + SHELL_TICKET_SECONDS)
+        _shell_used[name] = now
+    return 200, {'ticket': ticket, 'expires_in': SHELL_TICKET_SECONDS}
+
+
+def console_account(name):
+    """The system account the console of the user runs as and None, or None and the reason the user may not use a
+    console: its console login is off, or it has no TOTP token."""
+    with vpnrouter_users.session() as connection:
+        user = vpnrouter_users.summary(vpnrouter_users.entry(connection, name))
+    if not user['console'] or not user['console']['enabled']:
+        return None, f'console login is not enabled for {name}; vpn-router-user console sets it'
+    if not user['otp']:
+        return None, f'{name} has no TOTP token; the shell needs one, enrolled on the Account page'
+    return user['console']['account'], None
+
+
+def take_ticket(name, ticket):
+    """Whether the ticket of POST /shell is unexpired and was given to the user; it is used up either way."""
+    with _shell_lock:
+        holder, expires = _shell_tickets.pop(ticket, (None, 0.0))
+    return holder == name and expires > time.monotonic()
+
+
+def shell_command(account, unit, session):
+    """The command that runs the login shell of the system user account in the transient unit, on its terminal, with
+    the shell's session in VPN_ROUTER_SHELL for vpn-router-editor.
+
+    setsid makes the terminal the controlling one of systemd-run, which passes the window size on; systemd-run starts
+    the shell outside the web service's sandbox, in a PAM login session of the user.
+    """
+    return ['setsid', '--ctty', 'systemd-run', '--quiet', '--collect', '--pty', '--send-sighup', f'--unit={unit}',
+            f'--uid={account.pw_name}', '--property=PAMName=login', f'--working-directory={account.pw_dir}',
+            '--setenv=TERM=xterm-256color', f'--setenv=VPN_ROUTER_SHELL={session}', account.pw_shell or '/bin/sh', '-l']
+
+
+def editor_file(account, action, path, content=b'', version=''):
+    """Run editor-file as the system user account outside the sandbox: read the file, or write content to it when it
+    still has version. The exit status of editor-file and its output, or its message on failure."""
+    command = ['systemd-run', '--quiet', '--collect', '--pipe', f'--uid={account}', EDITOR_FILE, action, path]
+    try:
+        result = subprocess.run(command + ([version] if action == 'write' else []), input=content, capture_output=True,
+                                timeout=EDITOR_TIMEOUT)
+    except (OSError, subprocess.TimeoutExpired) as exc:
+        return 1, f'editor-file cannot be run: {exc}'.encode()
+    return result.returncode, result.stdout if result.returncode == 0 else result.stderr.strip() or \
+        f'editor-file ended with status {result.returncode}'.encode()
+
+
+def shell_editor(name, method, parts, body):
+    """Answer a request of a file open in the editor of one of the user's shells: the HTTP status and the JSON document.
+
+      GET    /shell/editor/<session>/<id>   {"path", "content", "version"}, version the SHA-256 of the content
+      PUT    /shell/editor/<session>/<id>   {"content", "version"} writes the content when the file still has version,
+                                            else 409; answers {"path", "version"}
+      DELETE /shell/editor/<session>/<id>   closes the file
+
+    The file is read and written as the shell's console account (editor_file). 404 for a session that is not a shell of
+    the user or a file it does not have open.
+    """
+    if len(parts) != 4:
+        return 404, {'error': f'no route {method} /{"/".join(parts)}'}
+    with _shell_lock:
+        session = _shell_sessions.get(parts[2])
+        path = session['files'].get(parts[3]) if session and session['user'] == name else None
+        account = session['account'] if path else None
+    if path is None:
+        return 404, {'error': 'no such file is open in a shell of yours'}
+    if method == 'DELETE':
+        with _shell_lock:
+            session['files'].pop(parts[3], None)
+        return 200, {'path': path, 'closed': True}
+    if method == 'GET':
+        status, output = editor_file(account, 'read', path)
+        if status != 0:
+            return (400 if status == 2 else 500), {'error': output.decode(errors='replace')}
+        return 200, {'path': path, 'content': output.decode(), 'version': hashlib.sha256(output).hexdigest()}
+    if method != 'PUT':
+        return 405, {'error': f'{method} is not allowed on a file of the editor'}
+    if not isinstance(body, dict) or not isinstance(body.get('content'), str) or not isinstance(body.get('version'), str):
+        return 400, {'error': 'the body must be {"content", "version"}'}
+    content = body['content'].encode()
+    if len(content) > EDITOR_MAX_BYTES:
+        return 413, {'error': f'the content is larger than {EDITOR_MAX_BYTES // 1024} KiB'}
+    status, output = editor_file(account, 'write', path, content, body['version'])
+    if status != 0:
+        return {2: 400, 3: 409}.get(status, 500), {'error': output.decode(errors='replace')}
+    log(f'editor of {name} saved {path} as {account}')
+    return 200, {'path': path, 'version': hashlib.sha256(content).hexdigest()}
+
+
+def editor_request(connection):
+    """Answer one request of vpn-router-editor on the editor socket: {"session", "path"} on a line opens the file in the
+    editor of the shell of the session, whose client is sent {"editor": "open", "session", "id", "path"} as a text
+    message.
+
+    The peer must run as the shell's console account and the path must be absolute. The answer is {"ok": true} or
+    {"error"} on a line.
+    """
+    try:
+        connection.settimeout(EDITOR_TIMEOUT)
+        _, uid, _ = struct.unpack('iII', connection.getsockopt(socket.SOL_SOCKET, socket.SO_PEERCRED,
+                                                                struct.calcsize('iII')))
+        request = json.loads(connection.makefile('rb').readline(4096) or b'null')
+        if not isinstance(request, dict) or not isinstance(request.get('session'), str) or \
+                not isinstance(request.get('path'), str):
+            answer = {'error': 'the request must be {"session", "path"}'}
+        elif not os.path.isabs(request['path']):
+            answer = {'error': 'the path must be absolute'}
+        else:
+            with _shell_lock:
+                session = _shell_sessions.get(request['session'])
+                if session is None or session['uid'] != uid:
+                    answer = {'error': 'no shell of the Router Manager has this session; vre works only in its shell'}
+                elif len(session['files']) >= EDITOR_FILES_MAX:
+                    answer = {'error': f'the editor has {EDITOR_FILES_MAX} files open; close one first'}
+                else:
+                    file_id = secrets.token_urlsafe(8)
+                    session['files'][file_id] = request['path']
+                    answer = None
+            if answer is None:
+                session['send'](TEXT, json.dumps({'editor': 'open', 'session': request['session'], 'id': file_id,
+                                                  'path': request['path']}).encode())
+                log(f'editor of {session["user"]} opened {request["path"]}')
+                answer = {'ok': True}
+        connection.sendall(json.dumps(answer).encode() + b'\n')
+    except (OSError, ValueError, struct.error):
+        pass
+    finally:
+        connection.close()
+
+
+def editor_listen():
+    """Listen on EDITOR_SOCKET, which any local user may connect to, answering each connection in a thread with
+    editor_request; the socket of an earlier run is replaced. Does not return; a failure to listen is logged and the
+    editor stays closed."""
+    try:
+        if os.path.lexists(EDITOR_SOCKET):
+            os.unlink(EDITOR_SOCKET)
+        listener = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
+        listener.bind(EDITOR_SOCKET)
+        os.chmod(EDITOR_SOCKET, 0o666)
+        listener.listen(16)
+    except OSError as exc:
+        log(f'the editor socket {EDITOR_SOCKET} cannot be opened: {exc}')
+        return
+    while True:
+        try:
+            connection, _ = listener.accept()
+        except OSError:
+            continue
+        threading.Thread(target=editor_request, args=(connection,), name='editor request', daemon=True).start()
+
+
+def frame(opcode, payload):
+    """A final, unmasked WebSocket frame of a server."""
+    size = len(payload)
+    if size < 126:
+        length = bytes([size])
+    elif size < 65536:
+        length = bytes([126]) + size.to_bytes(2, 'big')
+    else:
+        length = bytes([127]) + size.to_bytes(8, 'big')
+    return bytes([0x80 | opcode]) + length + payload
+
+
+def exact(handler, size):
+    """The next size bytes from the client of the Handler handler; ConnectionError when it closes first."""
+    data = handler.rfile.read(size)
+    if len(data) != size:
+        raise ConnectionError('the client closed the connection')
+    return data
+
+
+def message(handler, send):
+    """The opcode and the payload of the next WebSocket data message of the client of the Handler handler, or CLOSE
+    and its payload.
+
+    Fragments are joined and unmasked; a ping is answered with send, a pong ignored. ValueError for an unmasked
+    frame or a message over MESSAGE_LIMIT.
+    """
+    opcode, payload = None, b''
+    while True:
+        head = exact(handler, 2)
+        code, size = head[0] & 0x0F, head[1] & 0x7F
+        if not head[1] & 0x80:
+            raise ValueError('a frame of the client is not masked')
+        if size == 126:
+            size = int.from_bytes(exact(handler, 2), 'big')
+        elif size == 127:
+            size = int.from_bytes(exact(handler, 8), 'big')
+        if len(payload) + size > MESSAGE_LIMIT:
+            raise ValueError(f'a message is larger than {MESSAGE_LIMIT} bytes')
+        mask = exact(handler, 4) * (size // 4 + 1)
+        data = bytes(byte ^ key for byte, key in zip(exact(handler, size), mask))
+        if code == PING:
+            send(PONG, data)
+            continue
+        if code == PONG:
+            continue
+        if code == CLOSE:
+            return CLOSE, data
+        opcode = code if opcode is None else opcode
+        payload += data
+        if head[0] & 0x80:
+            return opcode, payload
+
+
+def shell(handler, name):
+    """Answer GET /shell?ticket=<ticket>, a WebSocket handshake the Handler handler received, with a login shell of the
+    user's console account (vpnrouter_users.console) on a terminal.
+
+    The ticket must come from POST /shell for the user named by the token. Binary messages of the client are its
+    keystrokes, a text message {"cols", "rows"} sets the window size, and binary messages of the server are the
+    terminal's output; a text message of the server {"editor": "open", "session", "id", "path"} opens a file the
+    shell named with vpn-router-editor (editor_request), which the client reads and saves with
+    /shell/editor/<session>/<id> (shell_editor) while the shell lives. The shell ends after web.shell_idle_minutes
+    without a keystroke, when it exits, when the client closes the connection, or when a check of the user (SHELL_CHECK_SECONDS) finds its console login off or
+    its TOTP token gone; the server then closes it with the reason. Each opening, end and refusal is logged
+    with its reason.
+    """
+    def refuse(code, message):
+        log(f'shell of {name} from {handler.client()} refused: {message}')
+        body = json.dumps({'error': message}).encode() + b'\n'
+        handler.send_response(code)
+        handler.send_header('Content-Type', 'application/json')
+        handler.send_header('Content-Length', str(len(body)))
+        handler.end_headers()
+        handler.wfile.write(body)
+
+    key = handler.headers.get('Sec-WebSocket-Key', '').strip()
+    if handler.headers.get('Upgrade', '').lower() != 'websocket' or 'upgrade' not in handler.headers.get('Connection', '').lower() \
+            or handler.headers.get('Sec-WebSocket-Version') != '13' or not key:
+        return refuse(400, 'GET /shell must be a WebSocket handshake')
+    query = urllib.parse.parse_qs(urllib.parse.urlsplit(handler.path).query)
+    if not take_ticket(name, query.get('ticket', [''])[0]):
+        return refuse(403, 'the ticket is not valid; POST /shell gives one')
+    try:
+        options = vpnrouter.load_config()['web']
+    except SystemExit as exc:
+        return refuse(500, str(exc.code))
+    if not options['shell']:
+        return refuse(403, 'the shell is disabled; vpn-config-edit set web.shell true enables it')
+    try:
+        login, refusal = console_account(name)
+    except (vpnrouter_users.Failure, ldap.LDAPError, OSError) as exc:
+        return refuse(500, f'the user directory failed: {exc}')
+    if refusal:
+        return refuse(403, refusal)
+    try:
+        account = pwd.getpwnam(login)
+    except KeyError:
+        return refuse(500, f'the system does not know the account {login}; is nslcd running?')
+    unit = f'vpn-router-shell-{secrets.token_hex(4)}'
+    session = secrets.token_urlsafe(24)
+    master, terminal = os.openpty()
+    try:
+        process = subprocess.Popen(shell_command(account, unit, session), stdin=terminal, stdout=terminal, stderr=terminal,
+                                   env={'PATH': '/usr/sbin:/usr/bin:/sbin:/bin'})
+    except OSError as exc:
+        os.close(master)
+        return refuse(500, f'the shell cannot be started: {exc}')
+    finally:
+        os.close(terminal)
+    accept = base64.b64encode(hashlib.sha1((key + WEBSOCKET_GUID).encode()).digest()).decode()
+    handler.send_response(101, 'Switching Protocols')
+    handler.send_header('Upgrade', 'websocket')
+    handler.send_header('Connection', 'Upgrade')
+    handler.send_header('Sec-WebSocket-Accept', accept)
+    handler.end_headers()
+    handler.close_connection = True
+    client, started, idle = handler.client(), time.monotonic(), options['shell_idle_minutes'] * 60
+    log(f'shell of {name} from {client} opened as {account.pw_name} in {unit}')
+
+    lock, ended, typed = threading.Lock(), threading.Event(), [started]
+
+    def send(opcode, payload):
+        with lock:
+            handler.wfile.write(frame(opcode, payload))
+
+    with _shell_lock:
+        _shell_sessions[session] = {'user': name, 'account': account.pw_name, 'uid': account.pw_uid, 'send': send,
+                                    'files': {}}
+
+    def receive():
+        """Pass the client's keystrokes and window sizes to the terminal until it closes the connection."""
+        try:
+            while True:
+                opcode, payload = message(handler, send)
+                if opcode == CLOSE:
+                    break
+                if opcode == BINARY:
+                    os.write(master, payload)
+                    typed[0] = time.monotonic()
+                    with _shell_lock:
+                        _shell_used[name] = typed[0]
+                elif opcode == TEXT:
+                    size = json.loads(payload)
+                    fcntl.ioctl(master, termios.TIOCSWINSZ, struct.pack('HHHH', int(size['rows']), int(size['cols']), 0, 0))
+        except (OSError, ValueError, KeyError, TypeError, struct.error):
+            pass
+        finally:
+            ended.set()
+
+    reader = threading.Thread(target=receive, name=f'{unit} input', daemon=True)
+    reader.start()
+    reason = 'the shell ended'
+    checked = started
+    try:
+        while not ended.is_set():
+            left = typed[0] + idle - time.monotonic()
+            if left <= 0:
+                reason = f'no keystroke for {options["shell_idle_minutes"]} minutes'
+                break
+            # The user's console login and TOTP token are checked again every SHELL_CHECK_SECONDS.
+            if time.monotonic() - checked >= SHELL_CHECK_SECONDS:
+                checked = time.monotonic()
+                try:
+                    refusal = console_account(name)[1]
+                except (vpnrouter_users.Failure, ldap.LDAPError, OSError) as exc:
+                    refusal = f'the user directory failed: {exc}'
+                if refusal:
+                    reason = refusal
+                    break
+            if select.select([master], [], [], min(left, 1))[0]:
+                try:
+                    output = os.read(master, 65536)
+                except OSError:
+                    output = b''
+                if not output:
+                    break
+                send(BINARY, output)
+        else:
+            reason = 'the client closed the connection'
+    except OSError:
+        reason = 'the connection failed'
+    with _shell_lock:
+        _shell_sessions.pop(session, None)
+    run('systemctl', 'stop', unit)
+    try:
+        send(CLOSE, (1000).to_bytes(2, 'big') + reason.encode()[:120])
+    except OSError:
+        pass
+    try:
+        handler.connection.shutdown(socket.SHUT_RDWR)
+    except OSError:
+        pass
+    reader.join()
+    os.close(master)
+    try:
+        process.wait(timeout=10)
+    except subprocess.TimeoutExpired:
+        process.kill()
+        process.wait()
+    log(f'shell of {name} from {client} in {unit} ended after {int(time.monotonic() - started)} seconds: {reason}')

debian-package/src/usr/lib/vpn-router/vpnrouter_web/sites.py

@@ -0,0 +1,148 @@
+"""/sites: the settings of the web sites Caddy serves, the sites, and the files of each (site_files)."""
+
+import mimetypes
+import os
+import re
+import shutil
+import urllib.parse
+
+import ldap
+
+import vpnrouter
+import vpnrouter_sites
+from vpnrouter_status import run
+
+from .common import MIB, SITE_STATUS, section_change
+
+#: A path of a site's files: the site and the path in its folder.
+SITE_FILES = re.compile(r'^/sites/([^/]+)/files(?:/(.*))?$')
+
+
+def sites(method, path, query, body):
+    """Answer a /sites request but one of a site's files with vpnrouter_sites: the HTTP status and the JSON document.
+
+      GET    /sites          {"settings", "sites"}: the sites section of the configuration and the sites, each with its
+                             settings but private_key, with private_key_set, modified and its folder
+      PUT    /sites          change any of the settings of the sites section
+      POST   /sites          add a site: {"name", and any of "enabled", "hosts", "port", "listen", "tls", "ca",
+                             "certificate", "private_key", "index_file", "spa", "editors"}; an existing name is 409
+      GET    /sites/<name>   the site
+      PUT    /sites/<name>   change any of the settings of POST but name; an empty or absent private_key keeps the key
+      DELETE /sites/<name>   remove the site, with content=true also its folder
+
+    A change is applied by restarting vpn-router-setup without waiting for it.
+    """
+    if body == 'invalid' or (body is not None and not isinstance(body, dict)):
+        return 400, {'error': 'the body must be a JSON object'}
+    body = body or {}
+    parts = path.strip('/').split('/')
+    route = (method, len(parts))
+    try:
+        cfg = vpnrouter.load_config()
+        if route == ('GET', 1):
+            return 200, {'settings': cfg['sites'], 'sites': vpnrouter_sites.listing()}
+        if route == ('PUT', 1):
+            changed = section_change('sites', body)
+            return changed if isinstance(changed, tuple) else (200, {'settings': changed})
+        if route == ('POST', 1):
+            name = body.get('name')
+            document = vpnrouter_sites.save(cfg, name, {key: value for key, value in body.items() if key != 'name'},
+                                            True)
+            code = 201
+        elif route == ('GET', 2):
+            with vpnrouter_sites.database() as connection:
+                return 200, vpnrouter_sites.shown(vpnrouter_sites.get(connection, parts[1]))
+        elif route == ('PUT', 2):
+            document, code = vpnrouter_sites.save(cfg, parts[1], body, False), 200
+        elif route == ('DELETE', 2):
+            document = vpnrouter_sites.remove(parts[1], query.get('content', [''])[0] == 'true')
+            code = 200
+        else:
+            return 404, {'error': f'no route {method} {path}'}
+    except vpnrouter_sites.Failure as failure:
+        return SITE_STATUS.get(failure.status, 500), {'error': str(failure)}
+    except vpnrouter_sites.DatabaseError as exc:
+        return 500, {'error': str(exc)}
+    except (ldap.LDAPError, OSError) as exc:
+        return 500, {'error': f'the site cannot be changed: {exc}'}
+    except SystemExit as exc:
+        return 500, {'error': str(exc.code)}
+    run('systemctl', 'restart', '--no-block', 'vpn-router-setup.service')
+    return code, document
+
+
+def site_file_action(name, target, body):
+    """Answer a POST to a site's file or folder: {"folder": true} creates the folder, {"rename": "<path>"} moves the file
+    or folder to the path in the site's folder; the HTTP status and the JSON document."""
+    if not isinstance(body, dict):
+        return 400, {'error': 'the body must be a JSON object'}
+    try:
+        if body.get('folder') is True:
+            vpnrouter_sites.make_folder(target)
+            return 201, {'path': vpnrouter_sites.relative_of(name, target), 'folder': True}
+        if isinstance(body.get('rename'), str):
+            moved = vpnrouter_sites.rename(name, target, body['rename'])
+            return 200, {'path': vpnrouter_sites.relative_of(name, moved)}
+    except vpnrouter_sites.Failure as failure:
+        return SITE_STATUS.get(failure.status, 500), {'error': str(failure)}
+    except OSError as exc:
+        return 500, {'error': f'{exc.filename or target.name}: {exc.strerror}'}
+    return 400, {'error': 'give {"folder": true} or {"rename": "<path>"}'}
+
+
+def site_files(handler, name, relative, query, payload, send_body):
+    """Answer a request of a site's files the Handler handler received: the HTTP status and the JSON document, or None
+    once a file was sent.
+
+      GET    /sites/<name>/files/<path>   a folder: {"path", "entries": [{name, folder, size, modified}]}; a file:
+                                          the file itself, as an attachment
+      PUT    /sites/<name>/files/<path>   write the body to the file, its folders created; with unzip=true the body
+                                          is a zip archive extracted into the folder of the path: {"path", "files"}
+      POST   /sites/<name>/files/<path>   {"folder": true} creates the folder, {"rename": "<path>"} moves it
+      DELETE /sites/<name>/files/<path>   remove the file or folder
+
+    The body of a PUT needs a Content-Length of at most sites.upload_max_mb MiB.
+    """
+    try:
+        target = vpnrouter_sites.resolve(name, urllib.parse.unquote(relative))
+        if handler.command in ('GET', 'HEAD'):
+            if target.is_dir():
+                return 200, vpnrouter_sites.entries(name, target)
+            if not target.is_file():
+                return 404, {'error': f'{relative} does not exist'}
+            with open(target, 'rb') as handle:
+                size = os.fstat(handle.fileno()).st_size
+                handler.send_response(200)
+                handler.send_header('Content-Type', mimetypes.guess_type(target.name)[0] or 'application/octet-stream')
+                handler.send_header('Content-Length', str(size))
+                handler.send_header('Content-Disposition',
+                                    f"attachment; filename*=UTF-8''{urllib.parse.quote(target.name)}")
+                handler.send_header('Cache-Control', 'no-store')
+                handler.end_headers()
+                if send_body:
+                    shutil.copyfileobj(handle, handler.wfile, vpnrouter_sites.CHUNK)
+            return None
+        if handler.command == 'PUT':
+            length = handler.headers.get('Content-Length')
+            if not length or not length.isdigit():
+                return 411, {'error': 'the body needs a Content-Length'}
+            limit = vpnrouter.load_config()['sites']['upload_max_mb'] * MIB
+            if query.get('unzip', [''])[0] == 'true':
+                count = vpnrouter_sites.extract(handler.rfile, int(length), target, limit)
+                return 200, {'path': vpnrouter_sites.relative_of(name, target), 'files': count}
+            vpnrouter_sites.receive(handler.rfile, int(length), target, limit)
+            return 200, {'path': vpnrouter_sites.relative_of(name, target), 'files': 1}
+        if handler.command == 'POST':
+            return site_file_action(name, target, payload)
+        if handler.command == 'DELETE':
+            if not target.exists() and not target.is_symlink():
+                return 404, {'error': f'{relative} does not exist'}
+            vpnrouter_sites.delete(name, target)
+            return 200, {'path': vpnrouter_sites.relative_of(name, target), 'removed': True}
+    except vpnrouter_sites.Failure as failure:
+        return SITE_STATUS.get(failure.status, 500), {'error': str(failure)}
+    except OSError as exc:
+        return 500, {'error': f'{exc.filename or relative}: {exc.strerror}'}
+    except SystemExit as exc:
+        return 500, {'error': str(exc.code)}
+    return 405, {'error': f'{handler.command} is not allowed on a site\'s files'}

debian-package/src/usr/lib/vpn-router/vpnrouter_web/status.py

@@ -0,0 +1,322 @@
+"""The status of the router: / for people, /status, /status/full, /config and /postgresql, with the cache of the
+status that the requests of CACHE_SECONDS share (cached)."""
+
+import json
+import threading
+import time
+from html import escape
+
+import vpnrouter
+from vpnrouter_status import established, established_each, openvpn_clients, run, swanctl, wireguard_peers
+
+from .common import current, unit_state
+
+#: Seconds a collected status is answered again.
+CACHE_SECONDS = 2
+
+TAILWIND = 'https://cdn.jsdelivr.net/npm/@tailwindcss/browser@4'
+
+#: Seconds after which the status page in a browser reloads itself.
+REFRESH_SECONDS = 60
+
+#: The PostgreSQL settings /config shows for each cluster.
+POSTGRESQL_SETTINGS = ('server_version', 'listen_addresses', 'port', 'max_connections', 'shared_buffers',
+                       'effective_cache_size', 'work_mem', 'password_encryption', 'ssl', 'timezone')
+
+_cache = {'at': 0.0, 'data': None}
+
+_lock = threading.Lock()
+
+
+def package_version(package='vpn-router'):
+    """The installed version of the package, or None when it is not installed."""
+    result = run('dpkg-query', '-W', '-f=${Version}', package)
+    return (result.stdout.strip() or None) if result and result.returncode == 0 else None
+
+
+def docker_status():
+    """Whether Docker is installed, and the state of its service and of the Docker rules when it is."""
+    result = run('systemctl', 'list-unit-files', '--no-legend', 'docker.service')
+    if result is None or result.returncode != 0 or not result.stdout.strip():
+        return {'installed': False}
+    return {
+        'installed': True,
+        'service': unit_state('docker.service'),
+        'rules': unit_state('vpn-router-docker.service'),
+    }
+
+
+def postgresql_clusters():
+    """The state of each PostgreSQL cluster unit (postgresql@<version>-<name>), or {'postgresql': 'no cluster'} without one.
+
+    postgresql.service, which only runs /bin/true, is not reported.
+    """
+    lines = lines_of('systemctl', 'list-units', 'postgresql@*.service', '--all', '--plain', '--no-legend') or []
+    names = [line.split()[0].removesuffix('.service') for line in lines if line.strip()]
+    return {name: unit_state(f'{name}.service') for name in names} or {'postgresql': 'no cluster'}
+
+
+def collect(state):
+    """The status document. state says which features the router has."""
+    units = {'vpn-router-setup': unit_state('vpn-router-setup.service'), 'slapd': unit_state('slapd.service'),
+             **postgresql_clusters()}
+    manager_version = package_version('vpn-router-manager')
+    if manager_version:
+        units['vpn-router-manager'] = unit_state('vpn-router-manager.service')
+    if state.get('site_to_site') or state.get('p2s'):
+        units['strongswan'] = unit_state('strongswan.service')
+    if state.get('wireguard'):
+        units['wg-quick@wg0'] = unit_state('wg-quick@wg0.service')
+    if state.get('openvpn'):
+        units['openvpn-server@vpn-router'] = unit_state('openvpn-server@vpn-router.service')
+
+    status = {
+        'status': 'ok' if all(value == 'active' for value in units.values()) else 'degraded',
+        'version': package_version(),
+        'manager_version': manager_version,
+        'time': time.strftime('%Y-%m-%dT%H:%M:%S%z'),
+        'units': units,
+        'docker': docker_status(),
+    }
+    names = state.get('site_to_site')
+    if isinstance(names, list) and names:
+        counts = established_each(names).values()
+        status['site_to_site'] = {'connections': len(names),
+                                  'established': None if None in counts else sum(1 for count in counts if count)}
+    if state.get('p2s'):
+        status['p2s'] = {'clients': established('road-warrior')}
+    if state.get('wireguard'):
+        status['wireguard'] = {'peers': wireguard_peers()}
+    if state.get('openvpn'):
+        status['openvpn'] = {'clients': openvpn_clients()}
+    return status
+
+
+def shown(status, content, client):
+    """The status document as web.status_content shows it to the client at its address.
+
+    Every content has status, time and client_ip, the client's address, and content, which one it is: basic nothing
+    more; standard adds version, manager_version and services, the number of active units and of units in every
+    other state; full adds the whole status document of collect. Content that is not one of
+    vpnrouter.STATUS_CONTENTS, or not set, is basic.
+    """
+    if content not in vpnrouter.STATUS_CONTENTS:
+        content = 'basic'
+    if content == 'full':
+        return {**status, 'content': content, 'client_ip': client}
+    document = {'status': status['status'], 'content': content, 'time': status['time'], 'client_ip': client}
+    if content == 'standard':
+        active = sum(1 for value in status['units'].values() if value == 'active')
+        document.update(version=status['version'], manager_version=status['manager_version'],
+                        services={'active': active, 'failed': len(status['units']) - active})
+    return document
+
+
+def lines_of(*args):
+    """The output lines of a command, or None when it fails."""
+    result = run(*args)
+    return result.stdout.splitlines() if result and result.returncode == 0 else None
+
+
+def routes():
+    """The IPv4 routes as ip -j prints them, or None when ip fails."""
+    result = run('ip', '-j', '-4', 'route', 'show')
+    if result is None or result.returncode != 0:
+        return None
+    try:
+        return json.loads(result.stdout)
+    except ValueError:
+        return None
+
+
+def wireguard_details():
+    """The interface and the peers of wg0, with endpoints and allowed IPs; no private or preshared key."""
+    result = run('wg', 'show', 'wg0', 'dump')
+    if result is None or result.returncode != 0:
+        return None
+    rows = [line.split('\t') for line in result.stdout.splitlines()]
+    now = int(time.time())
+    return {
+        'public_key': rows[0][1] if rows and len(rows[0]) > 2 else None,
+        'listen_port': int(rows[0][2]) if rows and len(rows[0]) > 2 else None,
+        'peers': [{
+            'public_key': row[0],
+            'endpoint': None if row[2] == '(none)' else row[2],
+            'allowed_ips': row[3].split(','),
+            'handshake_seconds_ago': now - int(row[4]) if int(row[4]) else None,
+            'received_bytes': int(row[5]),
+            'sent_bytes': int(row[6]),
+        } for row in rows[1:] if len(row) >= 7],
+    }
+
+
+def postgresql_query(cluster, sql):
+    """The JSON value an SQL statement answers on a cluster (version/name), run by psql as postgres, or None when it fails."""
+    result = run('runuser', '-u', 'postgres', '--', 'psql', '--cluster', cluster, '-X', '-q', '-t', '-A',
+                 '-v', 'ON_ERROR_STOP=1', '-d', 'postgres', '-c', sql)
+    if result is None or result.returncode != 0:
+        return None
+    try:
+        return json.loads(result.stdout)
+    except ValueError:
+        return None
+
+
+def postgresql_clusters_of():
+    """The PostgreSQL clusters of pg_lsclusters, each with version, name, port, status and data_directory, or None when it fails."""
+    lines = lines_of('pg_lsclusters', '--no-header')
+    if lines is None:
+        return None
+    clusters = []
+    for line in lines:
+        fields = line.split()
+        if len(fields) >= 6:
+            clusters.append({'version': fields[0], 'name': fields[1], 'port': int(fields[2]) if fields[2].isdigit() else None,
+                             'status': fields[3], 'data_directory': fields[5]})
+    return clusters
+
+
+def postgresql_configuration():
+    """The PostgreSQL clusters on the router with the settings of POSTGRESQL_SETTINGS of each one that is online (None
+    for one that is not), or None when pg_lsclusters fails."""
+    clusters = postgresql_clusters_of()
+    if clusters is None:
+        return None
+    names = ', '.join(f"'{name}'" for name in POSTGRESQL_SETTINGS)
+    for cluster in clusters:
+        cluster['settings'] = postgresql_query(
+            f"{cluster['version']}/{cluster['name']}",
+            f'SELECT json_object_agg(name, current_setting(name) ORDER BY name) FROM pg_settings WHERE name IN ({names})',
+        ) if cluster['status'].startswith('online') else None
+    return {'clusters': clusters}
+
+
+def postgresql_databases():
+    """What /postgresql shows: the PostgreSQL clusters on the router, each with its databases (name, owner, encoding and
+    size in bytes) and their total size, None for a cluster that is not online; clusters is None when pg_lsclusters fails."""
+    clusters = postgresql_clusters_of()
+    if clusters is None:
+        return {'clusters': None}
+    for cluster in clusters:
+        databases = postgresql_query(
+            f"{cluster['version']}/{cluster['name']}",
+            "SELECT coalesce(json_agg(json_build_object('name', datname, 'owner', pg_get_userbyid(datdba), "
+            "'encoding', pg_encoding_to_char(encoding), 'size', pg_database_size(oid)) ORDER BY datname), '[]') "
+            'FROM pg_database',
+        ) if cluster['status'].startswith('online') else None
+        cluster['databases'] = databases
+        cluster['size'] = sum(database['size'] for database in databases) if isinstance(databases, list) else None
+    return {'clusters': clusters}
+
+
+def details(state):
+    """What /config shows: the configuration without its secrets, and what the router resolved and runs; caddy is the
+    installed Caddy, {version, source, service}, service the state of caddy.service, null when it is not installed."""
+    configuration = state.get('configuration', {})
+    caddy = package_version('caddy')
+    return {
+        'configuration': configuration,
+        'network': dict(state.get('network', {}), routes=routes()),
+        'ipsec': {
+            'connections': swanctl('--list-conns'),
+            'sas': swanctl('--list-sas'),
+        },
+        'wireguard': wireguard_details(),
+        'docker': {
+            'exposed_ports': configuration.get('docker', {}).get('exposed_ports', []),
+            'rules': lines_of('iptables', '-S', 'VPN-ROUTER-DOCKER'),
+        },
+        'postgresql': postgresql_configuration(),
+        # Caddy is upstream's once its repository is configured (vpn-router-caddy).
+        'caddy': {'version': caddy, 'source': 'upstream' if vpnrouter.CADDY_APT_SOURCE.is_file() else 'ubuntu',
+                  'service': unit_state('caddy.service')} if caddy else None,
+    }
+
+
+def text_of(status):
+    """The status document of shown for people, as plain text: a header, a blank line, then name: value lines."""
+    lines = ['VPN Router', f'Status: {status["status"]}']
+    if 'version' in status:
+        lines.append(f'Version: {status["version"] or "unknown"}')
+    lines += ['', f'Client IP: {status["client_ip"]}']
+    if 'manager_version' in status:
+        lines.append(f'Router Manager: {status["manager_version"] or "not installed"}')
+    if 'services' in status:
+        lines.append(f'Services: {status["services"]["active"]} active, {status["services"]["failed"]} failed')
+    lines += [f'{name}: {value}' for name, value in status.get('units', {}).items()]
+    if 'docker' in status:
+        docker = status['docker']
+        lines.append('Docker: not installed' if not docker['installed']
+                     else f'Docker: installed, service {docker["service"]}, rules {docker["rules"]}')
+    if 'site_to_site' in status:
+        established, connections = status['site_to_site']['established'], status['site_to_site']['connections']
+        lines.append(f'Site to site: {"unknown" if established is None else established} of {connections} established')
+    if 'p2s' in status:
+        clients = status['p2s']['clients']
+        lines.append(f'IKEv2: {"unknown" if clients is None else f"{clients} connected"}')
+    if 'openvpn' in status:
+        clients = status['openvpn']['clients']
+        lines.append(f'OpenVPN: {"unknown" if clients is None else f"{clients} connected"}')
+    if 'wireguard' in status:
+        peers = status['wireguard']['peers']
+        if peers is None:
+            lines.append('WireGuard: down')
+        else:
+            lines.append(f'WireGuard: {len(peers)} peers')
+            for number, peer in enumerate(peers, 1):
+                age = peer['handshake_seconds_ago']
+                lines.append(f'  peer {number}: {"no handshake yet" if age is None else f"handshake {age} s ago"}, '
+                             f'received {peer["received_bytes"]} B, sent {peer["sent_bytes"]} B')
+    return '\n'.join(lines) + '\n'
+
+
+def html_of(status):
+    """The status document of shown for a browser, as a page styled with Tailwind CSS."""
+    colour = 'bg-emerald-600 dark:bg-emerald-700' if status['status'] == 'ok' else 'bg-amber-600 dark:bg-amber-700'
+    version = f', version {status["version"] or "unknown"}' if 'version' in status else ''
+    # Each "name: value" line after the header of the text is a row; indented lines, such as WireGuard peers, are indented here too.
+    rows = []
+    for line in text_of(status).split('\n\n', 1)[1].splitlines():
+        if not line:
+            continue
+        name, _, value = line.partition(': ')
+        indent = ' pl-8' if line.startswith(' ') else ''
+        rows.append(f'<tr class="border-t border-slate-200 first:border-t-0 dark:border-slate-700">'
+                    f'<th class="py-2 pr-4{indent} text-left font-medium text-slate-600 dark:text-slate-300">{escape(name.strip())}</th>'
+                    f'<td class="py-2">{escape(value)}</td></tr>')
+    body = ''.join(rows)
+    return f"""<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    <meta name="color-scheme" content="light dark">
+    <meta http-equiv="refresh" content="{REFRESH_SECONDS}">
+    <title>VPN Router</title>
+    <script src="{TAILWIND}"></script>
+  </head>
+  <body class="min-h-screen bg-slate-100 text-slate-900 dark:bg-slate-900 dark:text-slate-100">
+    <div class="mx-auto max-w-2xl px-4 py-10">
+      <div class="overflow-hidden rounded-2xl border border-slate-200 bg-white shadow-lg dark:border-slate-700 dark:bg-slate-800">
+        <div class="{colour} px-6 py-4 text-white">
+          <h1 class="text-xl font-semibold">VPN Router</h1>
+          <p class="mt-1 text-sm">Status: {escape(status['status'] + version)}</p>
+        </div>
+        <div class="px-6 py-4">
+          <table class="w-full text-sm"><tbody>{body}</tbody></table>
+        </div>
+        <p class="px-6 pb-6 text-xs text-slate-500 dark:text-slate-400">{escape(status['time'])} - <a class="underline" href="/status">JSON</a></p>
+      </div>
+    </div>
+  </body>
+</html>
+"""
+
+
+def cached():
+    """The status of collect, collected again when it is older than CACHE_SECONDS."""
+    with _lock:
+        if _cache['data'] is None or time.monotonic() - _cache['at'] > CACHE_SECONDS:
+            _cache['data'] = collect(current())
+            _cache['at'] = time.monotonic()
+        return _cache['data']

debian-package/src/usr/lib/vpn-router/wait-for-libpq

@@ -1,6 +1,7 @@
 #!/bin/sh
 # Wait until libpq is in the dynamic linker cache, where psycopg looks it up.
-# ExecStartPre= of vpn-router-web.service; TimeoutStartSec= of the unit bounds the wait.
+# ExecStartPre= of vpn-router-setup.service, vpn-router-web.service and vpn-router-metrics.service;
+# TimeoutStartSec= of the unit bounds the wait.
 
 reported=
 until ldconfig -p | grep -q '^[[:space:]]*libpq\.so\.5 '; do

debian-package/src/usr/lib/vpn-router/webdav-auth

@@ -0,0 +1,51 @@
+#!/usr/bin/python3
+"""The auth proxy of rclone's WebDAV server of the web sites' folders (vpn-router-webdav.service).
+
+rclone runs it for each new user and password with {"user", "pass"} on standard input. The user signs in with the
+password of the router's directory, followed by the TOTP code for an enrolled user. A member of
+vpnrouter_users.ADMIN_GROUP sees the folders of all sites, any other user those of the sites whose editors group
+the user is a member of (vpnrouter_sites.editable), each as a folder named after its site. The answer on standard output
+is rclone's combine backend of those folders; a failed sign-in, a user with no site or any failure is a message on
+standard error and the exit status 1, which rclone refuses the user with.
+"""
+
+import json
+import os
+import sys
+
+sys.path.insert(0, os.path.dirname(os.path.realpath(__file__)))
+
+import ldap
+
+import vpnrouter_ldap
+import vpnrouter_sites
+import vpnrouter_users
+
+
+def main():
+    try:
+        request = json.load(sys.stdin)
+        name, password = request['user'], request['pass']
+        vpnrouter_users.login(name, password, None)
+        connection = vpnrouter_ldap.manager()
+        try:
+            groups = vpnrouter_users.groups_of(connection, name)
+        finally:
+            connection.unbind_s()
+        if vpnrouter_users.ADMIN_GROUP in groups:
+            sites = [site['name'] for site in vpnrouter_sites.listing()]
+        else:
+            sites = vpnrouter_sites.editable(groups)
+    except (ValueError, KeyError, TypeError, OSError, ldap.LDAPError, vpnrouter_users.Failure,
+            vpnrouter_sites.DatabaseError) as exc:
+        sys.exit(f'webdav-auth: refused: {exc}')
+    if not sites:
+        sys.exit(f'webdav-auth: refused: {name} may change no site')
+    vpnrouter_sites.ensure_folders(sites)
+    upstreams = ' '.join(f'{site}={vpnrouter_sites.SITES_DIR / site}' for site in sites)
+    json.dump({'type': 'combine', '_root': '', 'upstreams': upstreams}, sys.stdout)
+    return 0
+
+
+if __name__ == '__main__':
+    sys.exit(main())

debian-package/src/usr/sbin/vpn-config-edit

@@ -9,18 +9,21 @@ number, true or false, a list of strings separated by commas (an empty value is
 or a string. remove takes site_to_site.NAME and removes that connection. The configuration with
 the change is checked as vpn-router-setup checks it, and only then written with
 vpnrouter.save_config, holding vpnrouter.config_lock; vpn-router-setup applies it at its next
-run, which set and remove remind of. A failure is a message on standard error; the exit status
-is 2 for an invalid request and 1 for any other failure. -h or --help shows the options.
+run, which set and remove remind of. With --restart they restart vpn-router-setup and wait until
+it has applied the change. A failure is a message on standard error; the exit status is 2 for an
+invalid request and 1 for any other failure, a failed run of vpn-router-setup included. -h or
+--help shows the options.
 
   vpn-config-edit show
-  vpn-config-edit set SECTION.OPTION VALUE
-  vpn-config-edit set site_to_site.NAME.OPTION VALUE
-  vpn-config-edit remove site_to_site.NAME
+  vpn-config-edit set [--restart] SECTION.OPTION VALUE
+  vpn-config-edit set [--restart] site_to_site.NAME.OPTION VALUE
+  vpn-config-edit remove [--restart] site_to_site.NAME
 """
 
 import argparse
 import copy
 import json
+import subprocess
 import sys
 
 sys.path.insert(0, '/usr/lib/vpn-router')
@@ -86,6 +89,9 @@ def main(argv):
         setter.add_argument('value', metavar='VALUE', help='its value; a list separated by commas')
         remover = commands.add_parser('remove', help='remove a site-to-site connection and write the configuration')
         remover.add_argument('key', metavar='site_to_site.NAME', help='the connection')
+        for changer in (setter, remover):
+            changer.add_argument('--restart', action='store_true',
+                                 help='restart vpn-router-setup and wait until it has applied the change')
         options = parser.parse_args(argv)
 
         if options.command == 'show':
@@ -124,7 +130,14 @@ def main(argv):
         print(f'{options.key} set to {json.dumps(value)} in {vpnrouter.CONFIG_FILE}.')
     else:
         print(f'{options.key} removed from {vpnrouter.CONFIG_FILE}.')
-    print('Apply it with: systemctl restart vpn-router-setup')
+    if not options.restart:
+        print('Apply it with: systemctl restart vpn-router-setup, or --restart')
+        return 0
+    print('Restarting vpn-router-setup...', flush=True)
+    if subprocess.run(['systemctl', 'restart', 'vpn-router-setup.service']).returncode != 0:
+        print('vpn-config-edit: vpn-router-setup failed; see journalctl -u vpn-router-setup', file=sys.stderr)
+        return 1
+    print('vpn-router-setup applied it.')
     return 0
 
 

debian-package/src/usr/sbin/vpn-router-site

@@ -0,0 +1,157 @@
+#!/usr/bin/python3
+"""Manage the web sites Caddy serves from the command line, with vpnrouter_sites.
+
+A site has a name, which also names its folder in /var/lib/vpn-router/sites, host names, a port, the interfaces whose
+firewall opens it, TLS (none, acme, ca with --ca, or file with --certificate and --key), the file served for a folder,
+whether any path without a file is served that file of the site (--spa), and the group whose members change its files.
+A change is applied by restarting vpn-router-setup without waiting for it. The answer is text for people on standard
+output, and a failure is a message on standard error. With --json the answer is JSON on standard output, and a failure
+is {"error": ...} there too. The exit status says what failed: 2 the request is invalid, 3 the site does not exist, 4
+the site exists, 1 anything else. -h or --help shows the commands and their options.
+
+  vpn-router-site [--json] list
+  vpn-router-site [--json] show <name>
+  vpn-router-site [--json] add <name> [options]
+  vpn-router-site [--json] update <name> [options]
+  vpn-router-site [--json] remove <name> [--content]
+
+  options: [--host H ...] [--no-hosts] [--port P] [--listen internal|external|both] [--tls none|acme|ca|file]
+           [--ca NAME] [--certificate FILE] [--key FILE] [--index FILE] [--spa | --no-spa]
+           [--enabled | --no-enabled] [--editors GROUP]
+"""
+
+import argparse
+import json
+import subprocess
+import sys
+
+sys.path.insert(0, '/usr/lib/vpn-router')
+
+import ldap
+
+import vpnrouter
+import vpnrouter_sites
+from vpnrouter_sites import Failure
+
+#: The help line of each command.
+HELP = {
+    'list': 'list the sites',
+    'show': 'show a site',
+    'add': 'add a site',
+    'update': 'change the settings of a site',
+    'remove': 'remove a site; its folder is kept without --content',
+}
+
+
+class Parser(argparse.ArgumentParser):
+    """An argument parser whose errors are Failures with status 2, so that --json answers them as JSON."""
+
+    def error(self, message):
+        raise Failure(f'{message}; see {self.prog} --help', 2)
+
+
+def parse(argv):
+    parser = Parser(prog='vpn-router-site', description='Manage the web sites of the router.')
+    parser.add_argument('--json', action='store_true', help='answer in JSON')
+    commands = parser.add_subparsers(dest='command', required=True, metavar='command', parser_class=Parser)
+    for command, text in HELP.items():
+        sub = commands.add_parser(command, help=text, description=text[0].upper() + text[1:] + '.')
+        if command != 'list':
+            sub.add_argument('name', help='the site name')
+        if command in ('add', 'update'):
+            sub.add_argument('--host', dest='hosts', action='append', metavar='HOST',
+                             help='a host name; give it once for each name, replacing the current ones')
+            sub.add_argument('--no-hosts', action='store_true', help='answer any host name')
+            sub.add_argument('--port', type=int, metavar='PORT', help='the TCP port')
+            sub.add_argument('--listen', choices=vpnrouter_sites.LISTEN, help='the interfaces whose firewall opens the port')
+            sub.add_argument('--tls', choices=vpnrouter_sites.TLS, help='where the certificate comes from')
+            sub.add_argument('--ca', metavar='NAME', help='the issuing CA of tls ca')
+            sub.add_argument('--certificate', metavar='FILE', help='the PEM certificate chain of tls file')
+            sub.add_argument('--key', metavar='FILE', help='the PEM private key of tls file')
+            sub.add_argument('--index', metavar='FILE', help='the file served for a folder')
+            sub.add_argument('--spa', action=argparse.BooleanOptionalAction, help='serve the index of the site for any '
+                             'path without a file')
+            sub.add_argument('--enabled', action=argparse.BooleanOptionalAction, help='serve the site')
+            sub.add_argument('--editors', metavar='GROUP', help="the group whose members change the files; '' for none")
+        if command == 'remove':
+            sub.add_argument('--content', action='store_true', help='remove the site\'s folder too')
+    return parser.parse_args(argv)
+
+
+def values_of(options):
+    """The settings the options give."""
+    values = {key: getattr(options, option) for key, option in (('port', 'port'), ('listen', 'listen'), ('tls', 'tls'),
+                                                               ('ca', 'ca'), ('index_file', 'index'), ('spa', 'spa'),
+                                                               ('enabled', 'enabled'), ('editors', 'editors'))
+              if getattr(options, option) is not None}
+    if options.no_hosts:
+        values['hosts'] = []
+    elif options.hosts:
+        values['hosts'] = options.hosts
+    for key, option in (('certificate', 'certificate'), ('private_key', 'key')):
+        path = getattr(options, option)
+        if path is not None:
+            try:
+                with open(path, encoding='utf-8') as handle:
+                    values[key] = handle.read()
+            except OSError as exc:
+                raise Failure(f'{path} cannot be read: {exc.strerror}', 2)
+    return values
+
+
+def run(options):
+    """The answer of the command the options name, and whether it changed a site."""
+    command = options.command
+    if command == 'list':
+        return {'sites': vpnrouter_sites.listing()}, False
+    if command == 'show':
+        with vpnrouter_sites.database() as connection:
+            return vpnrouter_sites.shown(vpnrouter_sites.get(connection, options.name)), False
+    if command == 'remove':
+        return vpnrouter_sites.remove(options.name, options.content), True
+    cfg = vpnrouter.load_config()
+    return vpnrouter_sites.save(cfg, options.name, values_of(options), command == 'add'), True
+
+
+def text_of(answer):
+    """The answer as text for people."""
+    if answer.get('removed'):
+        return f'site {answer["name"]} removed'
+    sites = answer['sites'] if 'sites' in answer else [answer]
+    if not sites:
+        return 'no sites'
+    head = ('SITE', 'ENABLED', 'HOSTS', 'PORT', 'LISTEN', 'TLS', 'EDITORS')
+    rows = [(site['name'], 'yes' if site['enabled'] else 'no', ', '.join(site['hosts']) or '*', str(site['port']),
+             site['listen'], site['tls'] + (f' {site["ca"]}' if site['tls'] == 'ca' else ''), site['editors'] or '-')
+            for site in sites]
+    widths = [max(len(row[column]) for row in (head, *rows)) for column in range(len(head))]
+    return '\n'.join('  '.join(cell.ljust(width) for cell, width in zip(row, widths)).rstrip() for row in (head, *rows))
+
+
+def main(argv):
+    # A request that cannot be parsed is answered in JSON when --json is among the arguments.
+    as_json = '--json' in argv
+    try:
+        options = parse(argv)
+        as_json = options.json
+        answer, changed = run(options)
+    except Failure as failure:
+        message, status = str(failure), failure.status
+    except vpnrouter_sites.DatabaseError as exc:
+        message, status = str(exc), 1
+    except (ldap.LDAPError, OSError) as exc:
+        message, status = f'the user directory failed: {exc}', 1
+    else:
+        if changed:
+            subprocess.run(['systemctl', 'restart', '--no-block', 'vpn-router-setup.service'])
+        print(json.dumps(answer) if as_json else text_of(answer))
+        return 0
+    if as_json:
+        print(json.dumps({'error': message}))
+    else:
+        print(f'vpn-router-site: {message}', file=sys.stderr)
+    return status
+
+
+if __name__ == '__main__':
+    sys.exit(main(sys.argv[1:]))

debian-package/src/usr/sbin/vpn-router-user

@@ -12,9 +12,15 @@ user exists, 1 anything else. -h or --help shows the commands and their options.
   vpn-router-user [--json] add <name> --first-name F --last-name L --email E   (password on stdin)
   vpn-router-user [--json] add <name> [--email E]   (a Manager-only account; password on stdin)
   vpn-router-user [--json] add <name> --service [--display-name N] [--description D] [--email E]
+                  [--redirect-uri U ...] [--post-logout-redirect-uri U ...] [--allowed-group G ...]
                                                   (a service account; password on stdin)
   vpn-router-user [--json] update <name> [--first-name F] [--last-name L] [--email E]
-  vpn-router-user [--json] update <name> [--display-name N] [--description D] [--email E]   (a service account)
+  vpn-router-user [--json] update <name> [--display-name N] [--description D] [--email E]
+                  [--redirect-uri U ...] [--post-logout-redirect-uri U ...] [--allowed-group G ...]
+                                                  (a service account)
+
+A service account with a redirect URI is a client of the OpenID Provider; each of the three options may be repeated,
+and replaces all values of its kind; one '' removes them.
   vpn-router-user [--json] passwd <name>       (password on stdin)
   vpn-router-user [--json] disable <name>
   vpn-router-user [--json] enable <name>
@@ -25,6 +31,7 @@ user exists, 1 anything else. -h or --help shows the commands and their options.
   vpn-router-user [--json] otp-enrol <name> <code>   (secret on stdin)
   vpn-router-user [--json] otp-remove <name>
   vpn-router-user [--json] console <name> (--posix | --account LOCAL | --off)
+  vpn-router-user [--json] passkeys-remove <name>
 """
 
 import argparse
@@ -37,6 +44,7 @@ import ldap
 
 import vpnrouter
 import vpnrouter_auth
+import vpnrouter_passkeys
 import vpnrouter_users
 from vpnrouter_users import Failure
 
@@ -57,8 +65,9 @@ HELP = {
     'otp-new': 'make a TOTP secret and its otpauth URI; nothing is stored',
     'otp-enrol': 'store the TOTP secret read from standard input, when the code is a code of it',
     'otp-remove': 'remove the TOTP token',
-    'console': "switch the console login of a member of admins on, as the user's own POSIX account in the directory "
-               'or as a local account, or off',
+    'console': "switch the console login of a member of admins with a TOTP token on, as the user's own POSIX account "
+               'in the directory or as a local account, or off',
+    'passkeys-remove': "remove all the user's passkeys",
 }
 
 #: The help of the person options.
@@ -66,6 +75,13 @@ PERSON_HELP = {'first_name': 'the first name', 'last_name': 'the last name', 'em
                'display_name': "a service account's display name; '' removes it",
                'description': "a service account's description; '' removes it"}
 
+#: The OpenID Provider client settings of a service account, their options and help.
+CLIENT_OPTIONS = (
+    ('redirect_uris', 'redirect-uri', 'a redirect URI of the OpenID Provider client'),
+    ('post_logout_redirect_uris', 'post-logout-redirect-uri', 'a post-logout redirect URI of the OpenID Provider client'),
+    ('allowed_groups', 'allowed-group', 'a group whose members may sign in to the OpenID Provider client'),
+)
+
 
 class Parser(argparse.ArgumentParser):
     """An argument parser whose errors are Failures with status 2, so that --json answers them as JSON."""
@@ -85,6 +101,9 @@ def parse(argv):
         if command in ('add', 'update'):
             for key, _ in vpnrouter_users.PERSON + vpnrouter_users.LABELS:
                 sub.add_argument(f'--{key.replace("_", "-")}', dest=key, metavar='TEXT', help=PERSON_HELP[key])
+            for key, option, text in CLIENT_OPTIONS:
+                sub.add_argument(f'--{option}', dest=key, action='append', metavar='VALUE',
+                                 help=f"{text}, of a service account; repeat it for more, '' for none")
         if command == 'add':
             sub.add_argument('--service', action='store_true', help='add a service account, which cannot sign in to the web service')
         if command == 'otp-enrol':
@@ -108,6 +127,10 @@ def run(connection, options, secret):
     if command == 'list':
         return vpnrouter_users.list_users(connection)
     values = {key: getattr(options, key, None) for key, _ in vpnrouter_users.PERSON + vpnrouter_users.LABELS}
+    for key, _, _ in CLIENT_OPTIONS:
+        given = getattr(options, key, None)
+        if given is not None:
+            values[key] = [value for value in given if value]
     if command == 'add':
         return vpnrouter_users.add(connection, options.name, secret, values, service=options.service)
     if command == 'update':
@@ -118,14 +141,28 @@ def run(connection, options, secret):
         return vpnrouter_users.otp_enrol(connection, options.name, secret, options.code)
     if command == 'console':
         return vpnrouter_users.console(connection, options.name, not options.off, options.account)
+    if command == 'passkeys-remove':
+        return vpnrouter_passkeys.remove(connection, options.name)
     return getattr(vpnrouter_users, command.replace('-', '_'))(connection, options.name)
 
 
-def console_text(console):
-    """The console login of a user as a cell: -, off, posix (uid N) or local and the account."""
+def console_text(user):
+    """The console login of a user as a cell: -, off, posix (uid N) or local and the account, refused without a TOTP
+    token."""
+    console = user['console']
     if console is None or not console['enabled']:
         return '-' if console is None else 'off'
-    return f'local {console["account"]}' if console['local'] else f'posix (uid {console["uid"]})'
+    text = f'local {console["account"]}' if console['local'] else f'posix (uid {console["uid"]})'
+    return text if user['otp'] else f'{text}, refused: no OTP'
+
+
+def client_text(user):
+    """The OpenID Provider client settings of a service account as a cell: -, or the numbers of its URIs and its allowed
+    groups."""
+    if not user.get('redirect_uris'):
+        return '-'
+    groups = ','.join(user['allowed_groups']) or 'all users'
+    return f'{len(user["redirect_uris"])} redirect, {len(user["post_logout_redirect_uris"])} logout, {groups}'
 
 
 def text_of(answer):
@@ -139,12 +176,13 @@ def text_of(answer):
     users = answer['users'] if 'users' in answer else [answer]
     if not users:
         return 'no users'
-    head = ('USER', 'KIND', 'STATE', 'CERTIFICATE', 'OTP', 'CONSOLE', 'FIRST NAME', 'LAST NAME', 'E-MAIL')
+    head = ('USER', 'KIND', 'STATE', 'CERTIFICATE', 'OTP', 'PASSKEYS', 'CONSOLE', 'FIRST NAME', 'LAST NAME', 'E-MAIL',
+            'OIDC CLIENT')
     rows = [(user['name'], 'internal' if user['internal'] else 'service' if user['service'] else 'manager' if user['manager_only'] else 'vpn',
              'disabled' if not user['enabled'] else 'locked' if user['locked'] else 'enabled',
              'issued' if user['certificate'] else 'missing',
-             'enrolled' if user['otp'] else '-', console_text(user['console']),
-             user['first_name'] or '-', user['last_name'] or '-', user['email'] or '-')
+             'enrolled' if user['otp'] else '-', str(len(user['passkeys'])) if user['passkeys'] else '-', console_text(user),
+             user['first_name'] or '-', user['last_name'] or '-', user['email'] or '-', client_text(user))
             for user in users]
     widths = [max(len(row[column]) for row in (head, *rows)) for column in range(len(head))]
     return '\n'.join('  '.join(cell.ljust(width) for cell, width in zip(row, widths)).rstrip() for row in (head, *rows))

debian-package/src/usr/share/bash-completion/completions/vpn-config-edit.bash

@@ -0,0 +1,59 @@
+# bash completion for vpn-config-edit                                  -*- shell-script -*-
+
+# Python of the package that answers from its schema (vpnrouter.SCHEMA, vpnrouter.CONNECTION) and, read as root, the
+# site-to-site connections of the configuration: settings prints SECTION.OPTION of every setting and
+# site_to_site.NAME.OPTION of every connection, connections site_to_site.NAME, and values the values of a boolean
+# setting, $1.
+_vpn_config_edit_python()
+{
+    python3 -c '
+import sys
+sys.path.insert(0, "/usr/lib/vpn-router")
+import vpnrouter
+try:
+    connections = vpnrouter.read_settings().get("site_to_site", {})
+except (OSError, vpnrouter.ConfigError):
+    connections = {}
+if sys.argv[1] == "settings":
+    print("\n".join(f"{section}.{option}" for section, options in vpnrouter.SCHEMA.items() for option in options))
+    print("\n".join(f"site_to_site.{name}.{option}" for name in connections for option in vpnrouter.CONNECTION))
+elif sys.argv[1] == "connections":
+    print("\n".join(f"site_to_site.{name}" for name in connections))
+else:
+    section, _, option = sys.argv[2].rpartition(".")
+    defaults = vpnrouter.CONNECTION if section.startswith("site_to_site.") else vpnrouter.SCHEMA.get(section, {})
+    if isinstance(defaults.get(option), bool):
+        print("true\nfalse")
+' "$@" 2>/dev/null
+}
+
+_vpn_config_edit()
+{
+    local cur prev words cword split
+    _init_completion -s || return
+
+    # The command is the first word that is not an option; the arguments are the words after it.
+    local i command='' args=()
+    for ((i = 1; i < cword; i++)); do
+        if [[ -z $command ]]; then
+            [[ ${words[i]} != -* ]] && command=${words[i]}
+        elif [[ ${words[i]} != -* ]]; then
+            args+=("${words[i]}")
+        fi
+    done
+
+    if [[ $cur == -* ]]; then
+        COMPREPLY=($(compgen -W "--help$([[ $command == @(set|remove) ]] && echo ' --restart')" -- "$cur"))
+        return
+    fi
+
+    case $command,${#args[@]} in
+        ,*) COMPREPLY=($(compgen -W 'show set remove' -- "$cur")) ;;
+        set,0) COMPREPLY=($(compgen -W "$(_vpn_config_edit_python settings)" -- "$cur")) ;;
+        set,1) COMPREPLY=($(compgen -W "$(_vpn_config_edit_python values "${args[0]}")" -- "$cur")) ;;
+        remove,0) COMPREPLY=($(compgen -W "$(_vpn_config_edit_python connections)" -- "$cur")) ;;
+    esac
+} &&
+    complete -F _vpn_config_edit vpn-config-edit
+
+# ex: filetype=sh

debian-package/src/usr/share/bash-completion/completions/vpn-router-backup.bash

@@ -0,0 +1,41 @@
+# bash completion for vpn-router-backup                                -*- shell-script -*-
+
+_vpn_router_backup()
+{
+    local cur prev words cword split
+    _init_completion -s || return
+
+    # The command is the first word that is not an option; the arguments are the words after it.
+    local i command='' args=0 pbs=false
+    for ((i = 1; i < cword; i++)); do
+        if [[ -z $command ]]; then
+            [[ ${words[i]} != -* ]] && command=${words[i]}
+        elif [[ ${words[i]} == --pbs ]]; then
+            pbs=true
+        elif [[ ${words[i]} != -* ]]; then
+            ((args++))
+        fi
+    done
+
+    if [[ -z $command ]]; then
+        if [[ $cur == -* ]]; then
+            COMPREPLY=($(compgen -W '--help' -- "$cur"))
+        else
+            COMPREPLY=($(compgen -W 'run list restore' -- "$cur"))
+        fi
+        return
+    fi
+
+    if [[ $cur == -* ]]; then
+        COMPREPLY=($(compgen -W "--help$([[ $command == restore ]] && echo ' --pbs --yes')" -- "$cur"))
+        return
+    fi
+
+    # restore takes a local archive, or with --pbs a snapshot name, which vpn-router-backup list shows.
+    if [[ $command == restore ]] && ((args == 0)) && ! $pbs; then
+        _filedir
+    fi
+} &&
+    complete -F _vpn_router_backup vpn-router-backup
+
+# ex: filetype=sh

debian-package/src/usr/share/bash-completion/completions/vpn-router-ca.bash

@@ -0,0 +1,98 @@
+# bash completion for vpn-router-ca                                    -*- shell-script -*-
+
+# Python of the package that prints the revocation reasons (reasons) or, from the configuration read as root, the
+# issuing CAs (cas) or the certificate templates (templates), which other users do not get.
+_vpn_router_ca_python()
+{
+    python3 -c '
+import sys
+sys.path.insert(0, "/usr/lib/vpn-router")
+import vpnrouter
+import vpnrouter_pki
+if sys.argv[1] == "reasons":
+    print("\n".join(vpnrouter_pki.REASONS))
+else:
+    cfg = vpnrouter.load_config()
+    print("\n".join(vpnrouter.issuing_cas(cfg) if sys.argv[1] == "cas" else vpnrouter.pki_templates(cfg)))
+' "$@" 2>/dev/null
+}
+
+_vpn_router_ca()
+{
+    local cur prev words cword split
+    _init_completion -s || return
+
+    # The command and, for ca and root, the action are the first words that are not options; the arguments are the
+    # words after them but option values.
+    local i command='' action='' args=0
+    for ((i = 1; i < cword; i++)); do
+        case ${words[i]} in
+            --ca | --template | --csr | --subject | --san | --pfx | --reason | --out) ((i++)) ;;
+            -*) ;;
+            *)
+                if [[ -z $command ]]; then
+                    command=${words[i]}
+                elif [[ $command == @(ca|root) && -z $action ]]; then
+                    action=${words[i]}
+                else
+                    ((args++))
+                fi
+                ;;
+        esac
+    done
+
+    case $prev in
+        --ca)
+            COMPREPLY=($(compgen -W "$(_vpn_router_ca_python cas)" -- "$cur"))
+            return
+            ;;
+        --template)
+            COMPREPLY=($(compgen -W "$(_vpn_router_ca_python templates)" -- "$cur"))
+            return
+            ;;
+        --reason)
+            COMPREPLY=($(compgen -W "$(_vpn_router_ca_python reasons)" -- "$cur"))
+            return
+            ;;
+        --csr | --pfx | --out)
+            _filedir
+            return
+            ;;
+        --subject | --san)
+            return
+            ;;
+    esac
+    $split && return
+
+    if [[ -z $command ]]; then
+        if [[ $cur == -* ]]; then
+            COMPREPLY=($(compgen -W '--json --help' -- "$cur"))
+        else
+            COMPREPLY=($(compgen -W 'status list issue revoke maintain ca root' -- "$cur"))
+        fi
+        return
+    fi
+
+    if [[ $cur == -* ]]; then
+        local options='--help'
+        case $command$action in
+            list) options+=' --ca' ;;
+            issue) options+=' --ca --template --csr --subject --san --pfx' ;;
+            revoke) options+=' --reason' ;;
+            rootexport-key) options+=' --out' ;;
+            rootremove-key) options+=' --yes' ;;
+        esac
+        COMPREPLY=($(compgen -W "$options" -- "$cur"))
+        return
+    fi
+
+    case $command,$action,$args in
+        ca,,*) COMPREPLY=($(compgen -W 'csr import' -- "$cur")) ;;
+        root,,*) COMPREPLY=($(compgen -W 'export-key remove-key import-key import-crl' -- "$cur")) ;;
+        ca,*,0) COMPREPLY=($(compgen -W "$(_vpn_router_ca_python cas)" -- "$cur")) ;;
+        ca,import,1 | root,import-key,0 | root,import-crl,0) _filedir ;;
+    esac
+} &&
+    complete -F _vpn_router_ca vpn-router-ca
+
+# ex: filetype=sh

debian-package/src/usr/share/bash-completion/completions/vpn-router-caddy.bash

@@ -0,0 +1,24 @@
+# bash completion for vpn-router-caddy                                 -*- shell-script -*-
+
+_vpn_router_caddy()
+{
+    local cur prev words cword
+    _init_completion || return
+
+    # After the command only --help is left.
+    local word
+    for word in "${words[@]:1:cword-1}"; do
+        if [[ $word != -* ]]; then
+            [[ $cur == -* ]] && COMPREPLY=($(compgen -W '--help' -- "$cur"))
+            return
+        fi
+    done
+    if [[ $cur == -* ]]; then
+        COMPREPLY=($(compgen -W '--json --help' -- "$cur"))
+    else
+        COMPREPLY=($(compgen -W 'status apply use-upstream' -- "$cur"))
+    fi
+} &&
+    complete -F _vpn_router_caddy vpn-router-caddy
+
+# ex: filetype=sh

debian-package/src/usr/share/bash-completion/completions/vpn-router-group.bash

@@ -0,0 +1,74 @@
+# bash completion for vpn-router-group                                 -*- shell-script -*-
+
+# The names of the users and of the groups of the router's directory, read as root; nothing for other users.
+_vpn_router_group_users()
+{
+    vpn-router-user --json list 2>/dev/null |
+        python3 -c 'import json, sys; print("\n".join(user["name"] for user in json.load(sys.stdin)["users"]))' 2>/dev/null
+}
+
+_vpn_router_group_names()
+{
+    vpn-router-group --json list 2>/dev/null |
+        python3 -c 'import json, sys; print("\n".join(group["name"] for group in json.load(sys.stdin)["groups"]))' 2>/dev/null
+}
+
+_vpn_router_group()
+{
+    local cur prev words cword split
+    _init_completion -s || return
+
+    # The command is the first word that is not an option; the arguments are the words after it but option values.
+    local i command='' args=0
+    for ((i = 1; i < cword; i++)); do
+        if [[ -z $command ]]; then
+            [[ ${words[i]} != -* ]] && command=${words[i]}
+            continue
+        fi
+        case ${words[i]} in
+            --member | --description | --name) ((i++)) ;;
+            -*) ;;
+            *) ((args++)) ;;
+        esac
+    done
+
+    if [[ -z $command ]]; then
+        if [[ $cur == -* ]]; then
+            COMPREPLY=($(compgen -W '--json --help' -- "$cur"))
+        else
+            COMPREPLY=($(compgen -W 'list add update remove member-add member-remove' -- "$cur"))
+        fi
+        return
+    fi
+
+    case $prev in
+        --member)
+            COMPREPLY=($(compgen -W "$(_vpn_router_group_users)" -- "$cur"))
+            return
+            ;;
+        --description | --name)
+            return
+            ;;
+    esac
+    $split && return
+
+    if [[ $cur == -* ]]; then
+        local options='--help'
+        case $command in
+            add) options+=' --member --description' ;;
+            update) options+=' --name --description' ;;
+        esac
+        COMPREPLY=($(compgen -W "$options" -- "$cur"))
+        return
+    fi
+
+    # The group, which add takes new, then the user of member-add and member-remove.
+    if ((args == 0)) && [[ $command != @(list|add) ]]; then
+        COMPREPLY=($(compgen -W "$(_vpn_router_group_names)" -- "$cur"))
+    elif ((args == 1)) && [[ $command == member-@(add|remove) ]]; then
+        COMPREPLY=($(compgen -W "$(_vpn_router_group_users)" -- "$cur"))
+    fi
+} &&
+    complete -F _vpn_router_group vpn-router-group
+
+# ex: filetype=sh

debian-package/src/usr/share/bash-completion/completions/vpn-router-site.bash

@@ -0,0 +1,95 @@
+# bash completion for vpn-router-site                                  -*- shell-script -*-
+
+# The names of the sites, of the groups and of the general-purpose issuing CAs, read as root; nothing for other users.
+_vpn_router_site_names()
+{
+    vpn-router-site --json list 2>/dev/null |
+        python3 -c 'import json, sys; print("\n".join(site["name"] for site in json.load(sys.stdin)["sites"]))' 2>/dev/null
+}
+
+_vpn_router_site_groups()
+{
+    vpn-router-group --json list 2>/dev/null |
+        python3 -c 'import json, sys; print("\n".join(group["name"] for group in json.load(sys.stdin)["groups"]))' 2>/dev/null
+}
+
+_vpn_router_site_cas()
+{
+    python3 -c 'import sys; sys.path.insert(0, "/usr/lib/vpn-router"); import vpnrouter
+print("\n".join(vpnrouter.load_config()["pki"]["issuing_cas"]))' 2>/dev/null
+}
+
+_vpn_router_site()
+{
+    local cur prev words cword split
+    _init_completion -s || return
+
+    # The command is the first word that is not an option; the arguments are the words after it but option values.
+    local i command='' args=0
+    for ((i = 1; i < cword; i++)); do
+        if [[ -z $command ]]; then
+            [[ ${words[i]} != -* ]] && command=${words[i]}
+            continue
+        fi
+        case ${words[i]} in
+            --host | --port | --listen | --tls | --ca | --certificate | --key | --index | --editors) ((i++)) ;;
+            -*) ;;
+            *) ((args++)) ;;
+        esac
+    done
+
+    if [[ -z $command ]]; then
+        if [[ $cur == -* ]]; then
+            COMPREPLY=($(compgen -W '--json --help' -- "$cur"))
+        else
+            COMPREPLY=($(compgen -W 'list show add update remove' -- "$cur"))
+        fi
+        return
+    fi
+
+    case $prev in
+        --listen)
+            COMPREPLY=($(compgen -W 'internal external both' -- "$cur"))
+            return
+            ;;
+        --tls)
+            COMPREPLY=($(compgen -W 'none acme ca file' -- "$cur"))
+            return
+            ;;
+        --ca)
+            COMPREPLY=($(compgen -W "$(_vpn_router_site_cas)" -- "$cur"))
+            return
+            ;;
+        --editors)
+            COMPREPLY=($(compgen -W "$(_vpn_router_site_groups)" -- "$cur"))
+            return
+            ;;
+        --certificate | --key)
+            _filedir
+            return
+            ;;
+        --host | --port | --index)
+            return
+            ;;
+    esac
+    $split && return
+
+    if [[ $cur == -* ]]; then
+        local options='--help'
+        case $command in
+            add | update) options+=' --host --no-hosts --port --listen --tls --ca --certificate --key --index --spa
+                --no-spa --enabled --no-enabled --editors' ;;
+            remove) options+=' --content' ;;
+        esac
+        COMPREPLY=($(compgen -W "$options" -- "$cur"))
+        return
+    fi
+
+    # The site, which add takes new.
+    if ((args == 0)) && [[ $command != @(list|add) ]]; then
+        COMPREPLY=($(compgen -W "$(_vpn_router_site_names)" -- "$cur"))
+    fi
+} &&
+    complete -F _vpn_router_site vpn-router-site
+
+# ex: filetype=sh

debian-package/src/usr/share/bash-completion/completions/vpn-router-token.bash

@@ -0,0 +1,25 @@
+# bash completion for vpn-router-token                                 -*- shell-script -*-
+
+_vpn_router_token()
+{
+    local cur prev words cword split
+    _init_completion -s || return
+
+    case $prev in
+        --minutes | --hours | --days)
+            return
+            ;;
+    esac
+    $split && return
+
+    # The lifetime is one of --minutes, --hours and --days.
+    local options='--json --help' word
+    for word in "${words[@]:1:cword-1}"; do
+        [[ $word == --@(minutes|hours|days)* ]] && break
+    done
+    [[ $word == --@(minutes|hours|days)* ]] || options+=' --minutes --hours --days'
+    COMPREPLY=($(compgen -W "$options" -- "$cur"))
+} &&
+    complete -F _vpn_router_token vpn-router-token
+
+# ex: filetype=sh

debian-package/src/usr/share/bash-completion/completions/vpn-router-user.bash

@@ -0,0 +1,84 @@
+# bash completion for vpn-router-user                                  -*- shell-script -*-
+
+# The names of the users and of the groups of the router's directory, read as root; nothing for other users.
+_vpn_router_user_names()
+{
+    vpn-router-user --json list 2>/dev/null |
+        python3 -c 'import json, sys; print("\n".join(user["name"] for user in json.load(sys.stdin)["users"]))' 2>/dev/null
+}
+
+_vpn_router_user_groups()
+{
+    vpn-router-group --json list 2>/dev/null |
+        python3 -c 'import json, sys; print("\n".join(group["name"] for group in json.load(sys.stdin)["groups"]))' 2>/dev/null
+}
+
+_vpn_router_user()
+{
+    local cur prev words cword split
+    _init_completion -s || return
+
+    local commands='list add update passwd disable enable unlock remove profile otp-new otp-enrol otp-remove console
+        passkeys-remove'
+
+    # The command is the first word that is not an option; the arguments are the words after it but option values.
+    local i command='' args=0
+    for ((i = 1; i < cword; i++)); do
+        if [[ -z $command ]]; then
+            [[ ${words[i]} != -* ]] && command=${words[i]}
+            continue
+        fi
+        case ${words[i]} in
+            --first-name | --last-name | --email | --display-name | --description | --redirect-uri | \
+                --post-logout-redirect-uri | --allowed-group | --account) ((i++)) ;;
+            -*) ;;
+            *) ((args++)) ;;
+        esac
+    done
+
+    if [[ -z $command ]]; then
+        if [[ $cur == -* ]]; then
+            COMPREPLY=($(compgen -W '--json --help' -- "$cur"))
+        else
+            COMPREPLY=($(compgen -W "$commands" -- "$cur"))
+        fi
+        return
+    fi
+
+    case $prev in
+        --allowed-group)
+            COMPREPLY=($(compgen -W "$(_vpn_router_user_groups)" -- "$cur"))
+            return
+            ;;
+        --account)
+            # The local accounts console --account takes: a uid from 1000 to 19999, not nobody.
+            COMPREPLY=($(compgen -W "$(getent passwd | awk -F: '$3 >= 1000 && $3 < 20000 && $1 != "nobody" { print $1 }')" -- "$cur"))
+            return
+            ;;
+        --first-name | --last-name | --email | --display-name | --description | --redirect-uri | --post-logout-redirect-uri)
+            return
+            ;;
+    esac
+    $split && return
+
+    if [[ $cur == -* ]]; then
+        local options='--help'
+        case $command in
+            add) options+=' --first-name --last-name --email --service --display-name --description --redirect-uri
+                --post-logout-redirect-uri --allowed-group' ;;
+            update) options+=' --first-name --last-name --email --display-name --description --redirect-uri
+                --post-logout-redirect-uri --allowed-group' ;;
+            console) options+=' --posix --account --off' ;;
+        esac
+        COMPREPLY=($(compgen -W "$options" -- "$cur"))
+        return
+    fi
+
+    # The user name, which add takes new; otp-enrol then takes a code.
+    if ((args == 0)) && [[ $command != @(list|add) ]]; then
+        COMPREPLY=($(compgen -W "$(_vpn_router_user_names)" -- "$cur"))
+    fi
+} &&
+    complete -F _vpn_router_user vpn-router-user
+
+# ex: filetype=sh

debian-package/src/usr/share/doc/vpn-router/vpn-router.json.example

@@ -38,7 +38,8 @@
   },
   "p2s": {
     "enabled": false,
-    "address_pool": "172.16.0.0/24"
+    "address_pool": "172.16.0.0/24",
+    "dns_listen": "internal"
   },
   "wireguard": {
     "enabled": false,
@@ -63,7 +64,9 @@
     "trusted_proxies": [],
     "status_content": "basic",
     "shell": false,
-    "shell_idle_minutes": 15
+    "shell_idle_minutes": 15,
+    "shell_auth_timeout": 15,
+    "log_files": ["/var/log/syslog", "/var/log/auth.log"]
   },
   "ssh": {
     "ldap_login": false
@@ -75,6 +78,22 @@
     "manager_port": 7443,
     "caddy_source": "ubuntu"
   },
+  "oidc": {
+    "enabled": false
+  },
+  "sites": {
+    "enabled": false,
+    "upload_max_mb": 512,
+    "webdav": false,
+    "webdav_port": 7445
+  },
+  "dns": {
+    "enabled": false,
+    "nameserver": "",
+    "addresses": [],
+    "listen": "external",
+    "ttl": 300
+  },
   "pki": {
     "root_name": "VPN Router Root CA",
     "root_days": 7300,

debian-package/src/usr/share/vpn-router/sql/dns.sql

@@ -0,0 +1,150 @@
+-- The domains the router's name server (PowerDNS, gpgsql backend) is the primary of (vpnrouter_dns), in the
+-- vpn-router-dns database, whose domains, records and domainmetadata tables are PowerDNS's own schema.
+-- The whole file runs as one transaction, serialized by an advisory lock, so that two processes can load it at once.
+
+SELECT pg_advisory_xact_lock(hashtext('vpn-router dns schema'));
+
+DROP TABLE IF EXISTS dns_manual_records;
+
+-- A domain the router serves as its primary name server; sites says whether the host names of the enabled sites in
+-- it get records, ttl is the TTL of its records, null for dns.ttl.
+CREATE TABLE IF NOT EXISTS dns_domains (
+    name text PRIMARY KEY,
+    sites boolean NOT NULL,
+    ttl integer
+);
+
+-- A secondary name server of a domain: its NS name and the address it transfers the domain from.
+CREATE TABLE IF NOT EXISTS dns_secondaries (
+    domain text NOT NULL REFERENCES dns_domains (name) ON DELETE CASCADE,
+    nameserver text NOT NULL,
+    address inet NOT NULL,
+    PRIMARY KEY (domain, nameserver)
+);
+
+-- A record an administrator added to a domain, besides those of the domain itself and of the sites.
+CREATE TABLE IF NOT EXISTS dns_records (
+    domain text NOT NULL REFERENCES dns_domains (name) ON DELETE CASCADE,
+    name text NOT NULL,
+    type text NOT NULL,
+    content text NOT NULL,
+    ttl integer NOT NULL,
+    PRIMARY KEY (domain, name, type, content)
+);
+
+-- The digest of the records last written to a zone and the serial of its SOA.
+CREATE TABLE IF NOT EXISTS dns_state (
+    zone text PRIMARY KEY,
+    digest text NOT NULL,
+    serial bigint NOT NULL
+);
+
+CREATE OR REPLACE FUNCTION dns_domains_list()
+RETURNS TABLE (name text, sites boolean, ttl integer)
+LANGUAGE sql STABLE AS $$
+    SELECT name, sites, ttl FROM dns_domains ORDER BY name;
+$$;
+
+-- Add the domain, or set its sites and TTL.
+CREATE OR REPLACE PROCEDURE dns_domain_put(p_name text, p_sites boolean, p_ttl integer)
+LANGUAGE sql AS $$
+    INSERT INTO dns_domains VALUES (p_name, p_sites, p_ttl)
+    ON CONFLICT (name) DO UPDATE SET sites = p_sites, ttl = p_ttl;
+$$;
+
+-- Remove the domain with its secondaries and records.
+CREATE OR REPLACE PROCEDURE dns_domain_remove(p_name text)
+LANGUAGE sql AS $$
+    DELETE FROM dns_domains WHERE name = p_name;
+$$;
+
+CREATE OR REPLACE FUNCTION dns_secondaries_list()
+RETURNS TABLE (domain text, nameserver text, address text)
+LANGUAGE sql STABLE AS $$
+    SELECT domain, nameserver, host(address) FROM dns_secondaries ORDER BY domain, nameserver;
+$$;
+
+-- Add the secondary of the domain, or set its address.
+CREATE OR REPLACE PROCEDURE dns_secondary_put(p_domain text, p_nameserver text, p_address inet)
+LANGUAGE sql AS $$
+    INSERT INTO dns_secondaries VALUES (p_domain, p_nameserver, p_address)
+    ON CONFLICT (domain, nameserver) DO UPDATE SET address = p_address;
+$$;
+
+CREATE OR REPLACE PROCEDURE dns_secondary_remove(p_domain text, p_nameserver text)
+LANGUAGE sql AS $$
+    DELETE FROM dns_secondaries WHERE domain = p_domain AND nameserver = p_nameserver;
+$$;
+
+CREATE OR REPLACE FUNCTION dns_records_list()
+RETURNS TABLE (domain text, name text, type text, content text, ttl integer)
+LANGUAGE sql STABLE AS $$
+    SELECT domain, name, type, content, ttl FROM dns_records ORDER BY domain, name, type, content;
+$$;
+
+-- Add the record to the domain, or set its TTL.
+CREATE OR REPLACE PROCEDURE dns_record_put(p_domain text, p_name text, p_type text, p_content text, p_ttl integer)
+LANGUAGE sql AS $$
+    INSERT INTO dns_records VALUES (p_domain, p_name, p_type, p_content, p_ttl)
+    ON CONFLICT (domain, name, type, content) DO UPDATE SET ttl = p_ttl;
+$$;
+
+-- Remove the records of the name and type in the domain, all of them without content.
+CREATE OR REPLACE PROCEDURE dns_record_remove(p_domain text, p_name text, p_type text, p_content text)
+LANGUAGE sql AS $$
+    DELETE FROM dns_records
+    WHERE domain = p_domain AND name = p_name AND type = p_type AND (p_content IS NULL OR content = p_content);
+$$;
+
+-- Serve the zone as its primary and give it the records, its SOA first, whose content has {serial} for the serial,
+-- and the addresses of its secondaries, which are notified of its changes and may transfer it. The serial grows, to
+-- at least the current Unix time, only when the records differ from those last written.
+CREATE OR REPLACE PROCEDURE dns_apply(p_zone text, p_soa text, p_ttl integer, p_names text[], p_types text[],
+                                      p_contents text[], p_ttls integer[], p_secondaries text[])
+LANGUAGE plpgsql AS $$
+DECLARE
+    v_domain integer;
+    v_serial bigint;
+    v_digest text := md5(concat_ws('|', p_soa, p_ttl, array_to_string(p_names, ','), array_to_string(p_types, ','),
+                                   array_to_string(p_contents, ','), array_to_string(p_ttls, ',')));
+BEGIN
+    SELECT id INTO v_domain FROM domains WHERE name = p_zone;
+    IF v_domain IS NULL THEN
+        INSERT INTO domains (name, type) VALUES (p_zone, 'MASTER') RETURNING id INTO v_domain;
+    ELSE
+        UPDATE domains SET type = 'MASTER' WHERE id = v_domain AND type <> 'MASTER';
+    END IF;
+    DELETE FROM domainmetadata WHERE domain_id = v_domain AND kind IN ('ALSO-NOTIFY', 'ALLOW-AXFR-FROM');
+    INSERT INTO domainmetadata (domain_id, kind, content)
+    SELECT v_domain, kind, address FROM unnest(p_secondaries) AS address,
+                                        unnest(ARRAY['ALSO-NOTIFY', 'ALLOW-AXFR-FROM']) AS kind;
+    IF EXISTS (SELECT 1 FROM dns_state WHERE zone = p_zone AND digest = v_digest) THEN
+        RETURN;
+    END IF;
+    SELECT greatest(coalesce(max(serial) + 1, 1), extract(epoch FROM now())::bigint) INTO v_serial
+    FROM dns_state WHERE zone = p_zone;
+    DELETE FROM records WHERE domain_id = v_domain;
+    INSERT INTO records (domain_id, name, type, content, ttl, prio, disabled, auth)
+    VALUES (v_domain, p_zone, 'SOA', replace(p_soa, '{serial}', v_serial::text), p_ttl, 0, false, true);
+    INSERT INTO records (domain_id, name, type, content, ttl, prio, disabled, auth)
+    SELECT v_domain, r.name, r.type, r.content, r.ttl, 0, false, true
+    FROM unnest(p_names, p_types, p_contents, p_ttls) AS r(name, type, content, ttl);
+    INSERT INTO dns_state VALUES (p_zone, v_digest, v_serial)
+    ON CONFLICT (zone) DO UPDATE SET digest = v_digest, serial = v_serial;
+END;
+$$;
+
+-- Serve only the zones of the list, none for an empty one.
+CREATE OR REPLACE PROCEDURE dns_retain(p_zones text[])
+LANGUAGE sql AS $$
+    DELETE FROM domains WHERE name <> ALL (p_zones);
+    DELETE FROM dns_state WHERE zone <> ALL (p_zones);
+$$;
+
+-- The records of the zone as they are served.
+CREATE OR REPLACE FUNCTION dns_served(p_zone text)
+RETURNS TABLE (name text, type text, content text, ttl integer)
+LANGUAGE sql STABLE AS $$
+    SELECT r.name, r.type, r.content, r.ttl FROM records r JOIN domains d ON d.id = r.domain_id
+    WHERE d.name = p_zone ORDER BY r.type <> 'SOA', r.name, r.type, r.content;
+$$;

debian-package/src/usr/share/vpn-router/sql/oidc.sql

@@ -0,0 +1,113 @@
+-- The state of the router's OpenID Provider (vpnrouter_oidc) in the database of web.database.
+-- Codes, tokens and sessions are kept as the SHA-256 of their values; expired rows are purged when new ones are saved.
+-- The whole file runs as one transaction, serialized by an advisory lock, so that two processes can load it at once.
+
+SELECT pg_advisory_xact_lock(hashtext('vpn-router oidc schema'));
+
+-- An authorization code, valid until it is exchanged for tokens or expires.
+CREATE TABLE IF NOT EXISTS oidc_codes (
+    hash text PRIMARY KEY,
+    client_id text NOT NULL,
+    name text NOT NULL,
+    redirect_uri text NOT NULL,
+    scopes text[] NOT NULL,
+    nonce text,
+    code_challenge text NOT NULL,
+    code_challenge_method text NOT NULL,
+    auth_time timestamptz NOT NULL,
+    amr text[] NOT NULL,
+    expires timestamptz NOT NULL
+);
+
+-- An access token or a refresh token (kind) a client was issued for a user.
+CREATE TABLE IF NOT EXISTS oidc_tokens (
+    hash text PRIMARY KEY,
+    kind text NOT NULL CHECK (kind IN ('access', 'refresh')),
+    client_id text NOT NULL,
+    name text NOT NULL,
+    scopes text[] NOT NULL,
+    auth_time timestamptz NOT NULL,
+    amr text[] NOT NULL,
+    expires timestamptz NOT NULL
+);
+CREATE INDEX IF NOT EXISTS oidc_tokens_name ON oidc_tokens (name);
+
+-- A user's sign-in at the OpenID Provider, which the session cookie names.
+CREATE TABLE IF NOT EXISTS oidc_sessions (
+    hash text PRIMARY KEY,
+    name text NOT NULL,
+    auth_time timestamptz NOT NULL,
+    amr text[] NOT NULL,
+    expires timestamptz NOT NULL
+);
+
+CREATE OR REPLACE PROCEDURE oidc_code_save(p_hash text, p_client_id text, p_name text, p_redirect_uri text,
+                                           p_scopes text[], p_nonce text, p_code_challenge text,
+                                           p_code_challenge_method text, p_auth_time timestamptz, p_amr text[],
+                                           p_seconds integer)
+LANGUAGE sql AS $$
+    DELETE FROM oidc_codes WHERE expires < now();
+    INSERT INTO oidc_codes VALUES (p_hash, p_client_id, p_name, p_redirect_uri, p_scopes, p_nonce, p_code_challenge,
+                                   p_code_challenge_method, p_auth_time, p_amr, now() + make_interval(secs => p_seconds));
+$$;
+
+-- The unexpired code.
+CREATE OR REPLACE FUNCTION oidc_code_get(p_hash text)
+RETURNS TABLE (client_id text, name text, redirect_uri text, scopes text[], nonce text, code_challenge text,
+               code_challenge_method text, auth_time timestamptz, amr text[])
+LANGUAGE sql STABLE AS $$
+    SELECT client_id, name, redirect_uri, scopes, nonce, code_challenge, code_challenge_method, auth_time, amr
+    FROM oidc_codes WHERE hash = p_hash AND expires > now();
+$$;
+
+CREATE OR REPLACE PROCEDURE oidc_code_delete(p_hash text)
+LANGUAGE sql AS $$
+    DELETE FROM oidc_codes WHERE hash = p_hash;
+$$;
+
+CREATE OR REPLACE PROCEDURE oidc_token_save(p_hash text, p_kind text, p_client_id text, p_name text, p_scopes text[],
+                                            p_auth_time timestamptz, p_amr text[], p_seconds integer)
+LANGUAGE sql AS $$
+    DELETE FROM oidc_tokens WHERE expires < now();
+    INSERT INTO oidc_tokens VALUES (p_hash, p_kind, p_client_id, p_name, p_scopes, p_auth_time, p_amr,
+                                    now() + make_interval(secs => p_seconds));
+$$;
+
+-- The unexpired token of the kind.
+CREATE OR REPLACE FUNCTION oidc_token_get(p_hash text, p_kind text)
+RETURNS TABLE (client_id text, name text, scopes text[], auth_time timestamptz, amr text[])
+LANGUAGE sql STABLE AS $$
+    SELECT client_id, name, scopes, auth_time, amr FROM oidc_tokens
+    WHERE hash = p_hash AND kind = p_kind AND expires > now();
+$$;
+
+CREATE OR REPLACE PROCEDURE oidc_token_delete(p_hash text)
+LANGUAGE sql AS $$
+    DELETE FROM oidc_tokens WHERE hash = p_hash;
+$$;
+
+CREATE OR REPLACE PROCEDURE oidc_session_save(p_hash text, p_name text, p_amr text[], p_seconds integer)
+LANGUAGE sql AS $$
+    DELETE FROM oidc_sessions WHERE expires < now();
+    INSERT INTO oidc_sessions VALUES (p_hash, p_name, now(), p_amr, now() + make_interval(secs => p_seconds));
+$$;
+
+-- The unexpired session.
+CREATE OR REPLACE FUNCTION oidc_session_get(p_hash text)
+RETURNS TABLE (name text, auth_time timestamptz, amr text[])
+LANGUAGE sql STABLE AS $$
+    SELECT name, auth_time, amr FROM oidc_sessions WHERE hash = p_hash AND expires > now();
+$$;
+
+CREATE OR REPLACE PROCEDURE oidc_session_delete(p_hash text)
+LANGUAGE sql AS $$
+    DELETE FROM oidc_sessions WHERE hash = p_hash;
+$$;
+
+-- Remove every code, token and session of the user.
+CREATE OR REPLACE PROCEDURE oidc_revoke(p_name text)
+LANGUAGE sql AS $$
+    DELETE FROM oidc_codes WHERE name = p_name;
+    DELETE FROM oidc_tokens WHERE name = p_name;
+    DELETE FROM oidc_sessions WHERE name = p_name;
+$$;

debian-package/src/usr/share/vpn-router/sql/sites.sql

@@ -0,0 +1,85 @@
+-- The web sites Caddy serves (vpnrouter_sites), in the vpn-router-sites database.
+-- The whole file runs as one transaction, serialized by an advisory lock, so that two processes can load it at once.
+
+SELECT pg_advisory_xact_lock(hashtext('vpn-router sites schema'));
+
+-- A static web site: its host names, port, interfaces and TLS, and the group whose members change its files.
+CREATE TABLE IF NOT EXISTS sites (
+    name text PRIMARY KEY,
+    enabled boolean NOT NULL,
+    hosts text[] NOT NULL,
+    port integer NOT NULL,
+    listen text NOT NULL CHECK (listen IN ('internal', 'external', 'both')),
+    tls text NOT NULL CHECK (tls IN ('none', 'acme', 'ca', 'file')),
+    ca text NOT NULL,
+    certificate text NOT NULL,
+    private_key text NOT NULL,
+    index_file text NOT NULL,
+    spa boolean NOT NULL,
+    editors text NOT NULL,
+    modified timestamptz NOT NULL
+);
+
+-- Every site, by name; the private key is left out.
+CREATE OR REPLACE FUNCTION sites_list()
+RETURNS TABLE (name text, enabled boolean, hosts text[], port integer, listen text, tls text, ca text,
+               certificate text, index_file text, spa boolean, editors text, modified timestamptz)
+LANGUAGE sql STABLE AS $$
+    SELECT name, enabled, hosts, port, listen, tls, ca, certificate, index_file, spa, editors, modified
+    FROM sites ORDER BY name;
+$$;
+
+-- The site with its private key.
+CREATE OR REPLACE FUNCTION site_get(p_name text)
+RETURNS TABLE (name text, enabled boolean, hosts text[], port integer, listen text, tls text, ca text,
+               certificate text, private_key text, index_file text, spa boolean, editors text, modified timestamptz)
+LANGUAGE sql STABLE AS $$
+    SELECT name, enabled, hosts, port, listen, tls, ca, certificate, private_key, index_file, spa, editors, modified
+    FROM sites WHERE name = p_name;
+$$;
+
+-- The enabled sites with their private keys, by name, for Caddy's configuration and certificate files.
+CREATE OR REPLACE FUNCTION sites_served()
+RETURNS TABLE (name text, enabled boolean, hosts text[], port integer, listen text, tls text, ca text,
+               certificate text, private_key text, index_file text, spa boolean, editors text, modified timestamptz)
+LANGUAGE sql STABLE AS $$
+    SELECT name, enabled, hosts, port, listen, tls, ca, certificate, private_key, index_file, spa, editors, modified
+    FROM sites WHERE enabled ORDER BY name;
+$$;
+
+-- Add the site, or replace all its settings.
+CREATE OR REPLACE PROCEDURE site_put(p_name text, p_enabled boolean, p_hosts text[], p_port integer, p_listen text,
+                                     p_tls text, p_ca text, p_certificate text, p_private_key text, p_index_file text,
+                                     p_spa boolean, p_editors text)
+LANGUAGE sql AS $$
+    INSERT INTO sites VALUES (p_name, p_enabled, p_hosts, p_port, p_listen, p_tls, p_ca, p_certificate, p_private_key,
+                              p_index_file, p_spa, p_editors, now())
+    ON CONFLICT (name) DO UPDATE SET enabled = p_enabled, hosts = p_hosts, port = p_port, listen = p_listen,
+        tls = p_tls, ca = p_ca, certificate = p_certificate, private_key = p_private_key, index_file = p_index_file,
+        spa = p_spa, editors = p_editors, modified = now();
+$$;
+
+CREATE OR REPLACE PROCEDURE site_remove(p_name text)
+LANGUAGE sql AS $$
+    DELETE FROM sites WHERE name = p_name;
+$$;
+
+-- The names of the sites whose files the members of the groups may change.
+CREATE OR REPLACE FUNCTION sites_editable(p_groups text[])
+RETURNS TABLE (name text)
+LANGUAGE sql STABLE AS $$
+    SELECT name FROM sites WHERE editors <> '' AND editors = ANY (p_groups) ORDER BY name;
+$$;
+
+-- The names of the sites whose editors are the group.
+CREATE OR REPLACE FUNCTION sites_of_group(p_group text)
+RETURNS TABLE (name text)
+LANGUAGE sql STABLE AS $$
+    SELECT name FROM sites WHERE editors = p_group ORDER BY name;
+$$;
+
+-- Give the sites of a renamed group its new name.
+CREATE OR REPLACE PROCEDURE sites_rename_group(p_old text, p_new text)
+LANGUAGE sql AS $$
+    UPDATE sites SET editors = p_new, modified = now() WHERE editors = p_old;
+$$;

debian-package/src/usr/share/vpn-router/templates/Caddyfile.j2

@@ -1,13 +1,13 @@
-# Written by vpn-router-setup from /etc/vpn-router/vpn-router.json; edits are overwritten.
+# Written by vpn-router-setup from /etc/vpn-router/vpn-router.json and the web sites; edits are overwritten.
 {
 	auto_https disable_redirects
 {%- if https_email %}
 	email {{ https_email }}
 {%- endif %}
-{%- if acme_cas %}
+{%- if pki_cas %}
 	skip_install_trust
 	pki {
-{%- for ca in acme_cas %}
+{%- for ca in pki_cas %}
 		ca {{ ca.id }} {
 			name "{{ ca.name }}"
 			root {
@@ -23,7 +23,7 @@
 	}
 {%- endif %}
 }
-{% if web_enabled or 'https' in pki_publish or acme_cas %}
+{% if https and (web_enabled or 'https' in pki_publish or acme_cas) %}
 {{ local_fqdn }}:{{ https_web_port }} {
 {%- if 'https' in pki_publish %}
 	handle_path /pki/* {
@@ -32,9 +32,9 @@
 	}
 {%- endif %}
 {%- for ca in acme_cas %}
-	handle /acme/{{ ca.id }}/* {
+	handle /acme/{{ ca }}/* {
 		acme_server {
-			ca {{ ca.id }}
+			ca {{ ca }}
 		}
 	}
 {%- endfor %}
@@ -47,7 +47,7 @@
 	}
 }
 {% endif %}
-{%- if 'http-80' in pki_publish %}
+{%- if https and 'http-80' in pki_publish %}
 http://{{ local_fqdn }} {
 	handle_path /pki/* {
 		root * {{ pki_publish_dir }}
@@ -58,7 +58,7 @@ http://{{ local_fqdn }} {
 	}
 }
 {% endif %}
-{%- if 'https-default' in pki_publish %}
+{%- if https and 'https-default' in pki_publish %}
 {{ local_fqdn }}:443 {
 	handle_path /pki/* {
 		root * {{ pki_publish_dir }}
@@ -69,13 +69,39 @@ http://{{ local_fqdn }} {
 	}
 }
 {% endif %}
-{%- if manager_port %}
+{%- if https and manager_port %}
 {{ local_fqdn }}:{{ https_manager_port }} {
 	reverse_proxy {{ loopback }}:{{ manager_port }}
 }
 {% endif %}
-{%- if metrics_enabled %}
+{%- if https and metrics_enabled %}
 {{ local_fqdn }}:{{ metrics_https_port }} {
 	reverse_proxy {{ loopback }}:{{ metrics_port }}
 }
 {% endif %}
+{%- if webdav %}
+{{ local_fqdn }}:{{ webdav_port }} {
+	reverse_proxy {{ loopback }}:{{ webdav_loopback_port }}
+}
+{% endif %}
+{%- for site in sites %}
+# Site {{ site.name }}
+{{ site.addresses | join(', ') }} {
+	root * {{ site.root }}
+{%- if site.tls == 'ca' %}
+	tls {
+		issuer internal {
+			ca {{ site.ca }}
+		}
+	}
+{%- elif site.tls == 'file' %}
+	tls {{ site.cert }} {{ site.key }}
+{%- endif %}
+{%- if site.spa %}
+	try_files {path} /{{ site.index }}
+{%- endif %}
+	file_server {
+		index {{ site.index }}
+	}
+}
+{% endfor %}

debian-package/src/usr/share/vpn-router/templates/dnsmasq.conf.j2

@@ -0,0 +1,11 @@
+# Written by vpn-router-setup from /etc/vpn-router/vpn-router.json; edits are overwritten.
+# The resolver of the remote access clients, on the addresses of p2s.dns_listen, forwarding to systemd-resolved's stub.
+{% for address in p2s_resolver_addrs -%}
+listen-address={{ address }}
+{% endfor -%}
+bind-interfaces
+no-resolv
+server=127.0.0.53
+domain-needed
+no-hosts
+cache-size=1000

debian-package/src/usr/share/vpn-router/templates/oidc-page.html.j2

@@ -0,0 +1,74 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1">
+<meta name="robots" content="noindex">
+<title>{{ title }}</title>
+<style>
+body { font-family: system-ui, sans-serif; background: #f4f5f7; color: #1f2937; margin: 0; }
+main { max-width: 22rem; margin: 4rem auto; background: #fff; padding: 2rem; border-radius: 0.5rem; box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15); }
+h1 { font-size: 1.25rem; margin: 0 0 0.25rem; }
+p { margin: 0 0 1rem; color: #4b5563; }
+label { display: block; font-size: 0.875rem; margin: 0.75rem 0 0.25rem; }
+input { box-sizing: border-box; width: 100%; padding: 0.5rem; border: 1px solid #d1d5db; border-radius: 0.25rem; font-size: 1rem; }
+button { width: 100%; margin-top: 1.25rem; padding: 0.6rem; border: 0; border-radius: 0.25rem; font-size: 1rem; cursor: pointer; background: #1d4ed8; color: #fff; }
+button.secondary { background: #fff; color: #1d4ed8; border: 1px solid #1d4ed8; margin-top: 0.75rem; }
+.error { background: #fee2e2; color: #991b1b; padding: 0.5rem 0.75rem; border-radius: 0.25rem; margin-bottom: 1rem; }
+.issuer { font-size: 0.75rem; color: #6b7280; margin: 1.5rem 0 0; }
+</style>
+</head>
+<body>
+<main>
+<h1>{{ title }}</h1>
+{%- if message %}
+<p>{{ message }}</p>
+{%- endif %}
+{%- if error %}
+<div class="error" role="alert">{{ error }}</div>
+{%- endif %}
+{%- if form %}
+<form method="post" action="/oidc/login">
+<input type="hidden" name="request" value="{{ request }}">
+<label for="name">Name</label>
+<input id="name" name="name" value="{{ name }}" autocomplete="username webauthn" autocapitalize="none" spellcheck="false" required autofocus>
+<label for="password">Password</label>
+<input id="password" name="password" type="password" autocomplete="current-password" required>
+<label for="code">Code from the authenticator, when you have one</label>
+<input id="code" name="code" inputmode="numeric" pattern="[0-9]{6}" maxlength="6" autocomplete="one-time-code">
+<button type="submit">Sign in</button>
+</form>
+<form id="passkey-form" method="post" action="/oidc/login" hidden>
+<input type="hidden" name="request" value="{{ request }}">
+<input type="hidden" name="passkey_id">
+<input type="hidden" name="credential">
+</form>
+<button id="passkey" class="secondary" type="button" hidden>Sign in with a passkey</button>
+<script>
+// A passkey sign-in begins at /oidc/passkey and posts the browser's answer to /oidc/login with the authorization request.
+(function () {
+  var button = document.getElementById('passkey');
+  if (!window.PublicKeyCredential || !PublicKeyCredential.parseRequestOptionsFromJSON) {
+    return;
+  }
+  button.hidden = false;
+  button.addEventListener('click', async function () {
+    button.disabled = true;
+    try {
+      var begun = await (await fetch('/oidc/passkey', { method: 'POST' })).json();
+      var credential = await navigator.credentials.get({ publicKey: PublicKeyCredential.parseRequestOptionsFromJSON(begun.options.publicKey) });
+      var form = document.getElementById('passkey-form');
+      form.elements.passkey_id.value = begun.id;
+      form.elements.credential.value = JSON.stringify(credential.toJSON());
+      form.submit();
+    } catch (error) {
+      button.disabled = false;
+    }
+  });
+})();
+</script>
+{%- endif %}
+<p class="issuer">{{ issuer }}</p>
+</main>
+</body>
+</html>

debian-package/src/usr/share/vpn-router/templates/p2s-forwarder.conf.j2

@@ -1,4 +0,0 @@
-[Resolve]
-{% for address in local_addr_list -%}
-DNSStubListenerExtra={{ address }}
-{% endfor -%}

debian-package/src/usr/share/vpn-router/templates/road-warrior.conf.j2

@@ -39,5 +39,9 @@ pools {
   rw-pool {
     addrs = {{ p2s_address_pool }}
     dns   = {{ p2s_dns }}
+{%- if p2s_dns_domains %}
+    # INTERNAL_DNS_DOMAIN (RFC 8598): the domains the clients resolve with the DNS servers above.
+    25    = {{ p2s_dns_domains | join(', ') }}
+{%- endif %}
   }
 }

debian-package/src/usr/share/vpn-router/templates/wg0-peers.conf.j2

@@ -0,0 +1,9 @@
+{{ wg_peers_begin }}
+{% for user, key, ips in wg_peers -%}
+[Peer]
+# {{ user }}
+PublicKey = {{ key }}
+AllowedIPs = {{ ips | join(', ') }}
+
+{% endfor -%}
+{{ wg_peers_end }}

examples/azure/variables.tf

@@ -45,7 +45,7 @@ variable "vm_size" {
 }
 
 variable "local_fqdn" {
-  description = "FQDN of the router, used as the road-warrior/IKE identity and, when dns_zone_id is set, as the name of the A record created for it."
+  description = "FQDN of the router, used as the IKE identity and, when dns_zone_id is set, as the name of the A record created for it."
   type        = string
 }
 
@@ -89,13 +89,13 @@ variable "psk" {
 }
 
 variable "p2s_enabled" {
-  description = "Enable road-warrior (P2S) access."
+  description = "Enable IKEv2 access."
   type        = bool
   default     = false
 }
 
 variable "p2s_address_pool" {
-  description = "CIDR block assigned to road-warrior clients."
+  description = "CIDR block assigned to IKEv2 clients."
   type        = string
   default     = ""
 }

examples/gcp/variables.tf

@@ -37,7 +37,7 @@ variable "machine_type" {
 }
 
 variable "local_fqdn" {
-  description = "FQDN of the router, used as the road-warrior/IKE identity and, when dns_managed_zone is set, as the name of the A record created for it."
+  description = "FQDN of the router, used as the IKE identity and, when dns_managed_zone is set, as the name of the A record created for it."
   type        = string
 }
 
@@ -86,13 +86,13 @@ variable "psk" {
 }
 
 variable "p2s_enabled" {
-  description = "Enable road-warrior (P2S) access."
+  description = "Enable IKEv2 access."
   type        = bool
   default     = false
 }
 
 variable "p2s_address_pool" {
-  description = "CIDR block assigned to road-warrior clients."
+  description = "CIDR block assigned to IKEv2 clients."
   type        = string
   default     = ""
 }