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`users.py` and `admin.py` under the availability lens. `admin.py` needed
nothing — its moderator/admin line is drawn explicitly, self-modification is
refused, and every list it serves is bounded. `users.py` had four findings and
one of them is the worst of this whole pass.
AV9 `mail._send` is `smtplib` with a ten-second timeout, called straight
from four async handlers. That wait is not one request's, it is the
instance's: nothing else served, no node socket read, no WebRTC offer
relayed, until the MTA answers. Reachable by any signed-in user at
request rate through the endpoint below. It has no symptom a test
catches — everything simply works slowly, for everyone, whenever the
mail server is having a bad day.
AV10 `PATCH /v1/users/me` is the third path that makes the hub send mail
and the only one with neither a rate limit nor a captcha, while
`register` and `password/reset-request` have both. The address is any
string the caller types and the duplicate check only rejects one
already held by an account here, so every address *not* registered on
this hub was a valid target: a relay for verification codes with the
hub's own reputation attached. A rate limit counting by IP bounds a
caller and not an inbox, so the floor under it is a cooldown per
account — the same for a reset request, whose cost also lands in a
mailbox that is not the asker's.
AV11 `default_tab:` accepted any suffix on a `{key:path}` route with an
unbounded Text value and no cap on rows: one account could write
without limit into a table shared with everyone. The suffix is a group
id, which is what the SPA writes, so it is checked as one. A key over
64 characters was also a 500 rather than a 400 — the column is
String(64), which PostgreSQL enforces and SQLite does not, so it would
have appeared in production and in no test.
AV12 `/v1/notifications` and `/v1/groups` had no upper bound on `limit` and
no floor under `offset`, while every list in `admin.py` carries
`le=200`. The group directory takes no authentication at all.
Two shapes recur and are now named in §13.5b: a limit written on one of
several equivalent paths, and a bound that counts the wrong thing.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01T4YmK41VsEURWFdop4EEeT
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The passphrase derives two independent client-side values: auth_key (the
hub verifier) and bundle_key (AES-GCM key for the per-node identity
bundles, which live on nodes and never on the hub). Changing or
recovering a passphrase is therefore two operations — swap the hub
verifier, and re-wrap every reachable node's identity bundle.
Flow A — change a known passphrase (Profile page)
- POST /v1/users/password re-proves the current passphrase, swaps
pw_hash/salt/version, revokes every refresh token and returns a fresh
pair so the tab that made the change stays signed in.
- MeshBayTransport.rewrapAllNodes: for every group's online node, connect
with the old key, read the identity off the handshake, store it back
under the new key. Returns updated / unreachable / failed so the UI can
point at the operator-unpin fallback for the gaps. Always-shown
confirmation dialog listing reachable and unreachable groups.
Recovery key
- keyderive.js generateRecoveryKey (32 random bytes, grouped Base32) and
deriveRecoveryKey (HKDF-SHA256, domain meshbay:recovery:v1:<username>).
- Every per-node identity gets a second copy wrapped under the recovery
key: keypair_bundles.bundle_enc_recovery (node-only column, added in
_SCHEMA_KEYPAIR and via a PRAGMA-guarded ALTER for existing DBs),
carried on keypair_bundle_store / _resp. MNP 0.13 -> 0.14, additive.
- session.recoveryKey is persisted in IndexedDB (slot rk) and lazy-loaded
on connect, so a group joined in any later session still leaves a
recovery copy.
- Shown once at registration; optionally folded into the verification
e-mail as a pass-through the hub never stores or logs, with an opt-out.
- Profile -> Recovery key re-loads R and backfills every reachable node
via rewrapAllNodes in bundleKey mode (no passphrase re-entry).
Flow B — recover a lost passphrase (#/reset, linked from sign-in)
- POST /v1/users/password/reset-request {username, email}: both must be
the pair on file, checked against the blind email_hash (never
decrypted). A mismatch — wrong e-mail, unknown username, non-active
account — takes the identical no-op path (no code, no mail, same 200),
so it reveals nothing and cannot be used to spray reset mail from a
username alone. 5/min, 1-hour single-use code.
- POST /v1/users/password/reset {username, code, new_auth_key}: same
expiry / attempts / single-use checks as e-mail verification; revokes
every session and deletes every registered device key so a stored one
cannot sign back in past the reset.
- ResetPasswordPage: request code -> code + optional recovery key + new
passphrase -> reset + sign-in -> fan-out. connect() falls back to the
recovery-wrapped copy when the passphrase key cannot open bundle_enc.
Without a recovery key: sign-in is restored and each group needs the
operator-unpin fallback.
Supporting fixes (found in live testing)
- member unpin now also deletes the keypair bundle; connect() mints a
fresh identity when handed a bundle it cannot open (unless _rewrapOnly,
set by rewrapAllNodes), so a rejoin completes instead of dead-ending
before the invite-code prompt.
- A browser with no bundle key gets a passphrase prompt on the group page
instead of a "go back to the browser you registered on" message.
- RegisterPage / LoginPage / ResetPasswordPage trim the username so every
key derivation matches the hub's stored form.
Docs: docs/auth-confirm.md. Locale keys across all ten catalogues.
Tests: test_password_change, test_password_reset, test_recovery_email,
test_recovery_key, test_rewrap_fanout, test_bundle_store_recovery, plus
additions to test_admin_ops_mnp and test_webrtc_transport. Hub suite 492
passed; node suite 741 passed (the lone test_packaging_units failure is a
pre-existing RPM-spec flake, reproducible on main).
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GGkxJW9br8Y9bhT8ywJ3oc
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Registration now creates a pending account and sends a 6-digit code via
email; the account activates only after verification. Email changes on
the profile page follow the same flow. Group invitations send a
notification email to the invitee (without revealing their address to
the inviter) containing the invite code and hub link.
Backend: blind HMAC-SHA256 email index for uniqueness without decryption,
mail.py for localhost Postfix delivery, verification endpoints, cleanup
of expired codes and stale pending accounts, startup backfill of
email_hash for existing users.
Frontend: 3-phase register page, inline email change verification on
profile, invite-notify call with status display. All 10 locales updated.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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