Dorian e05bb3cc85 feat: Phase 3 Week 2 — Double Ratchet protocol for forward-secret mesh messaging ...

- Create mesh/ratchet.rs: full Signal-style Double Ratchet implementation
  - DH ratchet with X25519 ephemeral keypairs per step
  - Symmetric-key ratchet via HKDF-SHA256 chain derivation
  - Per-message ChaCha20-Poly1305 encryption with derived message keys
  - Out-of-order delivery via skipped message key cache (max 100)
  - Forward secrecy: old keys zeroized on ratchet step
  - Wire format: 40B header + nonce + ciphertext + tag
- Tests: full conversation, out-of-order, forward secrecy, wire format,
  long conversation (50 messages alternating), message roundtrip

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

2026-03-17 01:50:22 +00:00

..

src

feat: Phase 3 Week 2 — Double Ratchet protocol for forward-secret mesh messaging

2026-03-17 01:50:22 +00:00

tests

test: add backend integration test scaffolding with 3 RPC tests

2026-03-10 23:51:22 +00:00

Cargo.toml

feat: Phase 3 Week 1 — X3DH key agreement + HKDF foundation

2026-03-17 01:28:35 +00:00