0bdc222724
fix: address 16 architecture design flaws across all crates
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Phase 1 — Foundation:
- Constant-time token comparison via subtle::ConstantTimeEq (Fix 11)
- Structured error codes E001–E020 in new error_codes.rs (Fix 15)
- Remove dead envelope.capnp code and related types (Fix 16)
Phase 2 — Auth Hardening:
- Registration collision check via has_user_record() (Fix 5)
- Auth required on uploadHybridKey/fetchHybridKey RPCs (Fix 1)
- Identity-token binding at registration and login (Fix 2)
- Session token expiry with 24h TTL and background reaper (Fix 3)
- Bounded pending logins with 5-minute timeout (Fix 4)
Phase 3 — Resource Limits:
- Rate limiting: 100 enqueues/60s per token (Fix 6)
- Queue depth cap at 1000 + 7-day message TTL/GC (Fix 7)
- Partial queue drain via limit param on fetch/fetchWait (Fix 8)
Phase 4 — Crypto Fixes:
- OPAQUE KSF switched from Identity to Argon2id (Fix 10)
- Random AEAD nonce in hybrid KEM instead of HKDF-derived (Fix 12)
- Zeroize secret fields in HybridKeypairBytes (Fix 13)
- Encrypted client state files via QPCE format (Fix 9)
Phase 5 — Protocol:
- Commit fan-out to all existing members on invite (Fix 14)
- Add member_identities() to GroupMember
Breaking: existing OPAQUE registrations invalidated (Argon2 KSF).
Schema: added auth to hybrid key ops, identityKey to OPAQUE finish
RPCs, limit to fetch/fetchWait.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com >
2026-02-22 10:51:09 +01:00
f334ed3d43
feat: add post-quantum hybrid KEM + SQLCipher persistence
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Feature 1 — Post-Quantum Hybrid KEM (X25519 + ML-KEM-768):
- Create hybrid_kem.rs with keygen, encrypt, decrypt + 11 unit tests
- Wire format: version(1) | x25519_eph_pk(32) | mlkem_ct(1088) | nonce(12) | ct
- Add uploadHybridKey/fetchHybridKey RPCs to node.capnp schema
- Server: hybrid key storage in FileBackedStore + RPC handlers
- Client: hybrid keypair in StoredState, auto-wrap/unwrap in send/recv/invite/join
- demo-group runs full hybrid PQ envelope round-trip
Feature 2 — SQLCipher Persistence:
- Extract Store trait from FileBackedStore API
- Create SqlStore (rusqlite + bundled-sqlcipher) with encrypted-at-rest SQLite
- Schema: key_packages, deliveries, hybrid_keys tables with indexes
- Server CLI: --store-backend=sql, --db-path, --db-key flags
- 5 unit tests for SqlStore (FIFO, round-trip, upsert, channel isolation)
Also includes: client lib.rs refactor, auth config, TOML config file support,
mdBook documentation, and various cleanups by user.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com >
2026-02-22 08:07:48 +01:00
