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Anthony Ettinger
54da317f4e
Add a key-gated `ssh passwd@host` route (alias `password@`) that sets ONE
member-chosen password across every service with its own credential:
- git (Forgejo) new forgejo.SetPassword (PATCH /admin/users, clears
must_change; EnsureUser first so the account exists)
- mail (Mailu webmail) existing mailu.SetPassword
- chat (IRC/Ergo + The Lounge) new internal/ircpass package
Because the route authenticates by the member's registered SSH key, it also
serves as the forgot-password path — no old password required.
The BBS runs as a non-root service user, but the Ergo password store and The
Lounge user files are root-owned. internal/ircpass bridges this by shelling out
to scripts/set-irc-password.sh through a narrow sudoers rule (installed by
setup.sh). The new password travels on stdin (a new `set-irc-password.sh
<member> -` form), so it never appears in the process table or sudo's log.
UX: masked entry typed twice (readSecret); no-PTY reads stdin; empty input
generates a strong password and shows it once. Each service leg is independent
and best-effort with a per-service ✓/✗ summary, plus a confirmation email that
never contains the password.
Tests: ircpass (stdin contract + member/password rejection), forgejo.SetPassword,
auth IsPasswdName + reservation. Docs: credentials.md (passwd@ section) + irc.md.
Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
175 lines
8.5 KiB
Markdown
175 lines
8.5 KiB
Markdown
# IRC — `irc.profullstack.com`
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A lightweight, self-hosted IRC network co-located on the AgentBBS box, for
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**humans and agents**. It runs [Ergo](https://ergo.chat) (formerly Oragono): a
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single Go binary that bundles its own services (NickServ/ChanServ), a bouncer,
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TLS, message history, and IRCv3 — no Atheme/ZNC sidecars.
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It runs on the BBS box as its **own service on its own ports** (`ergo.service`,
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user `ergo`), independent of the wish server, under its own hostname
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`irc.profullstack.com` with its own Let's Encrypt cert (issued by Caddy).
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## Connect
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| Path | Address | For |
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| Native TLS | `irc.profullstack.com:6697` (TLS) | desktop/CLI clients (HexChat, irssi, WeeChat, Halloy…) |
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| WebSocket | `wss://irc.profullstack.com/irc` (or `wss://bbs.profullstack.com/irc`) | browser clients (The Lounge, Gamja, Kiwi) and agents over WS |
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| Plaintext | `127.0.0.1:6667` | **loopback only** — on-box tooling; firewalled off |
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There is **no in-BBS `ssh irc@` route** — members connect with their own IRC
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client (or web). The WebSocket path is fronted by Caddy (it terminates TLS and
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reverse-proxies to Ergo's loopback `127.0.0.1:8097`), so no extra public port is
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opened for the web.
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> **Public TLS port:** `6697` must be open on the host firewall **and** the
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> DigitalOcean cloud firewall (the edge layer) — opening only `ufw` leaves
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> external clients timing out. `6667` is loopback-only by design.
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### irssi (and HexChat / WeeChat)
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SASL **PLAIN**, username = your BBS name, password = your member IRC password.
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Connect by the **network name**, not the hostname, or irssi won't send SASL and
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the server replies `ACCOUNT_REQUIRED`:
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```
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/network add -sasl_username YOURNAME -sasl_password YOURPASSWORD -sasl_mechanism PLAIN ProfullstackBBS
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/server add -tls -tls_verify -network ProfullstackBBS irc.profullstack.com 6697
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/connect ProfullstackBBS
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/join #general
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```
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HexChat/WeeChat: server `irc.profullstack.com/6697`, TLS on, SASL PLAIN with the
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same username + password.
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### Membership (who can connect) — the BBS user store
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The network is **members-only**, and "member" means a **bbs.profullstack.com
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account** — a row in the BBS user store (the single user-level source of truth).
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There is **no self-service registration**; every client must authenticate with
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SASL, using **your BBS username as the account name**.
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The gate is Ergo's `auth-script`
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([`deploy/ergo/auth-script.sh`](../deploy/ergo/auth-script.sh), installed as
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`/usr/local/bin/ergo-auth-member`): on each login it (1) asks the loopback agentbbs
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endpoint **`/irc-auth?account=<name>`** (served next to `/verify`), which answers
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`{"member":bool,"premium":bool}` from the store, and (2) verifies the supplied
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**passphrase** against the member's stored password hash. The login is approved iff
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the account is a member **and** the password matches (and the account isn't banned).
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`accounts.require-sasl` is on, `accounts.registration` is off, and on first
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successful login the Ergo account is auto-created (`autocreate`).
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Each member has a **per-member IRC password** (this is a real credential — it
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*replaces* the earlier "membership is the credential, passphrase ignored" model,
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which let anyone who knew a member name connect as them). Passwords are stored as
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`pbkdf2_sha256` hashes in `/var/lib/ergo/irc-passwd` (ergo:ergo 0600); set or rotate
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them with [`scripts/set-irc-password.sh`](../scripts/set-irc-password.sh)
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(`set-irc-password.sh <member> [password]`, or `--all` to fill in any member missing
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one). The helper also updates the member's The Lounge `saslPassword` so the web
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client keeps working with no member action. Members connecting from a desktop client
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(irssi/HexChat/WeeChat) use this password as their SASL password.
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Members set their own IRC password (alongside git + mail) self-service via
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`ssh passwd@<host>` — see [`credentials.md`](credentials.md#passwd--self-service-reset-my-password-everywhere).
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That flow calls this same helper as `set-irc-password.sh <member> -` (password on
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stdin) through a narrow `sudo` rule installed by `setup.sh`, since the BBS process
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itself is unprivileged.
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> The SASL requirement has **no IP exemption** — web/agent clients reach Ergo
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> through Caddy from `127.0.0.1`, so exempting localhost would let every
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> WebSocket client bypass the member check.
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### Channels (groups) — premium-only creation (planned)
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Any member can `/join` existing channels. **Creating** a channel is intended to
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be a Founding Lifetime Member (premium) perk — the `/irc-auth` endpoint already
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returns each account's `premium` status for exactly this purpose.
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> **Status:** the premium *enforcement* for channel creation is **not yet wired**.
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> Ergo can't gate creation per-account natively, and the previous `ssh irc@`
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> `/create` command was removed with the route. The planned mechanism is
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> server-side: `channels.operator-only-creation: true` plus a small agentbbs
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> ChanServ-style bot (or oper helper) that creates+registers a channel for a
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> member only when `/irc-auth` reports `premium:true`. Until that lands,
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> `operator-only-creation` is left **off** (any member can create), so treat
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> premium-only creation as a TODO, not an active gate.
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### Connect as an agent
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Agents authenticate with **SASL PLAIN** using their member account name and their
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member IRC password (see Membership above). **CHATHISTORY** is enabled so an agent
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that reconnects can replay what it missed:
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```
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CAP REQ :sasl message-tags server-time draft/chathistory
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AUTHENTICATE PLAIN
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AUTHENTICATE <base64(\0account\0password)>
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...
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CHATHISTORY LATEST #lobby * 100
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```
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Any standard IRC library works — e.g. `irc-framework` (Node), `pydle` /
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`irc` (Python), `girc` (Go).
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## Network identity
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- **Network name:** `ProfullstackBBS` (`IRC_NETWORK` in `setup.sh`)
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- **Server name:** `irc.profullstack.com` (`IRC_DOMAIN` in `setup.sh`)
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- Access: **members-only** (SASL required; account = BBS user, checked via `/irc-auth`)
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- Self-service account registration: **off**
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- Channel creation: premium-only **(planned; not yet enforced — see Channels)**
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- Message history: **in-memory**, ~7-day window, `CHATHISTORY` enabled
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## Operating it
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It is provisioned by [`../setup.sh`](../setup.sh) (section 9b) and redeployed by
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the same self-update timer as the BBS. Toggle with `IRC=0`.
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| Thing | Where |
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| Config (rendered) | `/etc/ergo/ircd.yaml` |
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| Config template | [`deploy/ergo/ircd.yaml`](../deploy/ergo/ircd.yaml) (`__TOKENS__` filled in by setup.sh) |
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| State / db | `/var/lib/ergo/ircd.db` (`ERGO_DATA`) |
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| TLS cert | `/var/lib/ergo/tls/{fullchain,privkey}.pem` — copied from Caddy's Let's Encrypt cert by `ergo-certs.timer` (self-signed fallback on first boot) |
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| Binary + languages | `/opt/ergo/` |
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| Oper password | `/etc/agentbbs/ergo-oper.txt` (root-only) — `/OPER admin <pw>` |
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| Logs | `journalctl -u ergo -f` |
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| Reload (rehash + reload certs) | `systemctl reload ergo` (SIGHUP) |
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### TLS
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Caddy is the only ACME client on the box. It serves an `irc.profullstack.com`
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site (so it obtains a Let's Encrypt cert for that host), and rather than run a
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second ACME client, the `ergo-certs.timer` copies that cert into Ergo's TLS dir
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and reloads Ergo whenever it changes (every 12h, and 5 min after boot). On the
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very first deploy — before Caddy has issued the cert — setup.sh drops in a
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self-signed cert so 6697 comes up immediately; the timer swaps in the real one
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once it exists.
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> **DNS prerequisite:** point an A record `irc.profullstack.com → the box` (and
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> AAAA if you use IPv6). Caddy can't issue the cert until that resolves to the
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> droplet, so until then native clients on 6697 get the self-signed fallback.
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### Config knobs (`setup.sh` env)
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| Var | Default | Meaning |
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| `IRC` | `1` | install the IRC server (`0` to skip/disable) |
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| `IRC_DOMAIN` | `irc.<root-of-DOMAIN>` (e.g. `irc.profullstack.com`) | IRC server name + TLS cert host |
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| `ERGO_VERSION` | `2.18.0` | Ergo release to install |
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| `IRC_NETWORK` | `ProfullstackBBS` | network name shown to clients |
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| `ERGO_DATA` | `/var/lib/ergo` | Ergo state dir |
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## Relationship to `tor-irc@`
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Unrelated, complementary. `ssh tor-irc@bbs.profullstack.com <server>` is a
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**client** that connects *out* to a remote (e.g. `.onion`) IRC server from inside
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a member's pod. The 6697/WebSocket listeners (above) are the BBS hosting **its
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own** IRC network for people and agents to meet on.
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## Ideas / next steps
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- **Bridge to `internal/chat`** — relay the BBS hub chat ↔ an IRC channel.
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- **Per-pod / per-game channels** — auto-create `#pod-<name>`, `#game-<id>`.
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- **Persistent history** — switch `datastore.mysql` on if replay must survive
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restarts.
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