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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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Stage A — a group's content is a set of named roots
---------------------------------------------------
`shared_dir` becomes a list of {name, path, kind}. The name is the directory's
basename, derived once at add time and *stored*: recomputing it would
re-identify a whole library the day someone renames a folder on disk. Duplicate
names are refused case-insensitively and no root may contain another — both
compared with NFC folding, because most of these directories live on exFAT or
NTFS where `Films` and `films` are one directory.
Every index path carries its root name, in a one-root group as much as in a
five-root one. One path shape has to be got right once; two have to be kept
right for ever.
**A root that goes away freezes; it never empties.** Unmounting a volume makes
watchdog report every file under it as deleted, or presents an empty directory
to the next scan. Acting on either propagates deletions for a whole library to
every member, as though the owner had erased it. So a deletion is acted on only
once its root is confirmed readable, and availability is tracked per root — one
unplugged drive leaves the others serving. 12 tests, verified to fail against an
indexer without the check.
Events are not trusted to be complete either: ReadDirectoryChangesW drops them
under load and inotify on a FUSE mount misses changes made outside it. A
periodic reconciliation sweep is the only thing that recovers a missed event.
MNP 0.2 → 0.3 (additive). The hub needs no change: SwarmSource carries a content
hash, a node id and an endpoint — no paths, no filenames — and private groups
register nothing (H7).
Stage B — one implementation behind every front door
----------------------------------------------------
C1 and C6 were both "a second path into the node with its own weaker
handshake". Two implementations of `revoke` with two authorization checks is
that shape one size down. `meshbay_node/ops.py` holds each operation once,
takes the daemon state, and knows nothing about HTTP, argv or MNP. The loopback
API is one `_op(...)` line per endpoint; the MNP handlers call the same
functions. test_ops.py asserts the shape rather than trusting it.
Phase 14 is finished on top of it — `group list`, `gek init|rotate`, `reload`
(SIGHUP), `denylist show|clear`, `file list|rm`. **No operator action requires a
browser any more.** Plus `gek_rotate` and `member_unpin` as operator-signed MNP
operations: rotation is the half of revocation that revocation cannot do, since
the ex-member holds the current key, and the node generates the replacement
with its own CSPRNG — no key material crosses the wire, which is what the C5b
rule is actually about.
Two bugs found by running it rather than by testing it
------------------------------------------------------
GroupIndex is keyed by **content hash**, so the same bytes at two paths are one
entry — which is also why a scan reports ten files and indexes nine.
Reconciliation compared paths, so it decided the second path was a missed event
every 60 s, rewrote the entry and pushed an index update to every connected
peer. Seen in a live node's log.
`meshbay-node reload` crashed on first use with `subprocess` unimported: the
module compiles fine, which is the "syntax, not names" trap already recorded for
the SPA. test_cli_dispatch.py now walks every verb and refuses to let one be
added to the parser without an entry there.
Also corrected: protocol.py declared a second MNP_VERSION of "0.1" while the
wire carried "0.2" — harmless only because nothing imported it. And
_do_dir_create/_do_dir_delete referenced an undefined `filename` on their error
path.
740 tests pass; QE/deploy/e2e.py passes end to end against the live deployment.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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