Addresses 14 findings from the security audit across all severity levels:
CRITICAL:
- C-1: Add user blocking system (migration, DB queries, REST API, WS DM
send check) to prevent harassment via unconsented DMs
- C-2: Remove server version from unauthenticated /health and /info endpoints
to prevent fingerprinting
HIGH:
- H-1: Remove dangerous-settings feature from tauri-plugin-http
- H-3: Default allowSelfSigned to false in API client (was hardcoded true)
- H-4: Cap invite expiration to 30 days (720 hours)
- H-5: Add 256KB message size limit to LiveKit WS proxy (prevents OOM)
- H-6: Cap concurrent sessions to 25 per user (evicts oldest on overflow)
- H-8: Restrict /diagnostics/connectivity to ADMINISTRATOR role
MEDIUM:
- M-2: Deny access to legacy NULL-uploader unlinked attachments
- M-4: Log warnings on TOTP plaintext decryption fallback paths
- M-8: Remove acceptInvalidCerts from OG preview fetches
- M-10: Expand file upload blocklist (Java .class, OLE2, WASM, .lnk)
- M-12: Add LIMIT to ListInvites (200) and ListMembers (1000)
- M-14: Add CHECK constraint trigger on channels.type (text/voice/dm)
https://claude.ai/code/session_01KKo3RwjdmcNzkgXNfUkgNT
Security audit across all 11 sections (AUTH-001 through DATA-001) found
0 critical, 1 high, 7 medium, 15 low issues. This commit addresses:
- Add json:"-" to User.PasswordHash, User.TOTPSecret, Session.TokenHash
to prevent accidental serialization of sensitive fields (M7)
- Add X-Content-Type-Options: nosniff to file serve responses (M5)
- Apply owner-only guard to backup list endpoint for consistency (M6)
- Persist rate-limit lockouts to SQLite so they survive restarts (M2)
- Normalize DM non-participant responses to 404 to prevent oracle (L3)
- Add explicit per-entry expiry check in partial auth Lookup/Consume (L1)
- Truncate unknown WS message type to 64 chars before echo (L6)
- Rate-limit ping handler to 2/sec per user (L7)
- Replace raw error strings in update handlers with generic messages (L15)
- Update 4 tests to match new 404 behavior for DM non-participant
- C-3: inject setupLimiter into NewAdminAPI instead of package-level global
- H-5: generateRandomKey returns error instead of panicking
- H-6: replace init() bcrypt with sync.Once lazy initialization
- M-2: remove unsafe-inline from admin CSP script-src and style-src
- M-3: sanitize upload filenames (strip control chars, truncate to 255)
- M-5: truncate User-Agent to 512 bytes before storing as device
- M-10: MaxBodySizeUnless uses prefix matching instead of exact path
- M-12: wrap seedExistingDatabase in a single transaction
- M-13: use errors.Is for EOF check in upload handler
- M-14: log writeJSON encoding errors instead of discarding
- M-16: standardize error codes to INTERNAL_ERROR across all handlers
Security fixes (from multi-reviewer code review):
- Add DM participant auth checks to channel_focus, typing, and REST
message endpoints — prevents unauthorized access to DM channels
- Fix TOCTOU race in GetOrCreateDMChannel using IMMEDIATE transaction
- Validate YAML credentials before LiveKit config interpolation
- Add CSS variable injection prevention in custom theme loader
- Validate localStorage JSON before unsafe type casts
LiveKit stability:
- Track remote mic audio elements for cleanup on abnormal disconnect
- Remove duplicate token refresh timer scheduling
- Add .catch() to all floating applyMicMuteState promises
- Clear reconnectAc after async post-connect work completes
- Fix double cmd.Wait() race in LiveKit process Stop()
- Reorder voice_join guards: validate channel before livekit==nil check
- Add startup warning for external LiveKit webhook CIDR mismatch
DM system fixes:
- Emit dm_channel_close WebSocket event from REST close handler
- Re-open DM for caller when channel already exists
- Fix unread count incrementing for own messages and active DMs
- Reset channelBeforeDm after Back navigation (stale state bug)
New feature:
- Voice call duration timer in VoiceWidget (MM:SS / HH:MM:SS elapsed)
- Accent color restored on app startup (was only applied in settings)
Test infrastructure:
- Add DM tables to all test schemas (hubTestSchema)
- Inject test LiveKit client in voice handler tests (fixes 28 failures)
Task A: REST API endpoints in api/dm_handler.go — POST /api/v1/dms
(create/get DM channel), GET /api/v1/dms (list open DMs), DELETE
/api/v1/dms/{channelId} (close DM). Routes registered in router.go.
Task B: WebSocket DM routing — handleChatSend, handleChatEdit,
handleChatDelete, and handleReaction all check channel type and use
participant-based auth for DM channels instead of role permissions.
DM messages delivered via SendToUser to each participant (bypassing
channel-subscription model). Auto-reopens DM for recipient on new
message with dm_channel_open event. New broadcastToDMParticipants
helper. New WS event types: dm_channel_open, dm_channel_close.
Task C: Ready payload includes dm_channels from GetUserDMChannels.
Also adds GetDMParticipantIDs helper to db/dm_queries.go.
Claude