setup() encrypted BOTH the wrapped private key AND the key_check under the same
wrapKey with the SAME wrapIv — a GCM nonce-reuse bug (leaks keystream + enables
GHASH/tag forgery, which matters under E2EE's malicious-server threat model).
Fixes:
- setup() gives key_check its own independent nonce (checkIv).
- unlock() no longer decrypts key_check to verify the passphrase — that was
redundant (a wrong passphrase already fails the wrapped_private_key GCM auth
tag) AND was the second consumer of the reused nonce.
Backward-compatible: the uploaded bundle shape is unchanged, and existing users'
bundles still unlock (unlock only presence-checks key_check now; the private-key
decrypt path with wrap_iv is untouched). Also removed the unused, architecturally
ineffective lock() export (re-unlocks from IndexedDB on next mount; the meaningful
primitive is clearDevice). Re-review clean; tsc green.
Move messaging out of the notification center into its own left-nav module
(own page, own unread badge), so a reload returns to it and notifications stay
separate. Add a Messenger-style floating dock (bottom-right): pop a conversation
out from the page, keep chatting across navigation, minimise (rollup) or close.
- Messages is now a routed page; NotificationsPanel reverts to inbox-only and the
nav badge no longer mixes in messages.
- Extract shared KeyGate + ChatThread (used by both the page and dock windows);
e2ee exposes a shared unlock subscription so page and dock agree.
- ChatDock (always mounted for human users) owns the app-wide live-message
subscription and per-device key restore. EN/HU/DE strings.
A Messages tab in the notification center (hidden for demo): set up secure
messaging with a passphrase (key generated + wrapped in-browser via WebCrypto,
stored non-extractable per device), unlock on other devices, then chat with
end-to-end encrypted, live-delivered messages. The server-authored Siftlode
welcome is readable before any key setup.
- lib/e2ee.ts: ECDH P-256 + HKDF + AES-GCM, PBKDF2-wrapped key, IndexedDB.
- lib/messagesSocket.ts: WebSocket client with backoff reconnect.
- Messages.tsx: key gate, conversation list with decrypted previews, directory,
thread with client-side decrypt + encrypt-on-send. Unread feeds the nav badge.
EN/HU/DE strings.
