5 Commits

Author SHA1 Message Date
Fredrik Johansson
3a105e2c9a fix: protocol compliance — DTLS binding, sha256 integrity, derived signaling ID
Go (transport.go, crypto.go):
- DeriveForNetwork: HKDF per-room Ed25519 identity to avoid anchor peer-ID collision
  when daemon holds multiple simultaneous pair-room connections (§ waste-go pattern)
- sendHello: sign prefix||local_fp||remote_fp per yaw/2 §6 DTLS fingerprint binding
- onControl hello: verify fingerprint binding + sig before setting verified=true
- FileOffer.SHA256: carry file hash in offer message per yaw/2 §9
- SendFile: sha256 before offer, sends file-done with hash after streaming
- wireFileRecv: pion Detach API + sha256 during recv + wait for file-done + verify
- pendingDones map: goroutine-safe channel for file-done routing
- signaling keepalive: ping with 10 s timeout, 3-min read deadline on anchor loop

PWA (flit.ts):
- dtlsFP/sha256hex helpers
- Split PeerConn.signalingId (routing) from .peerId (cryptoId, for crypto/hello)
- _sendHello: include DTLS fingerprints in signature per §6
- _onControl hello: verify fingerprint binding
- sendFile: async, sha256 before offer
- _stream: send file-done after DC close
- _wire: set dataComplete=true on DC close, defer emit until file-done arrives
- _onControl file-done: set expectedSHA256, conditionally call _finalizeRecv
- _finalizeRecv: concatenate bufs, verify sha256, create URL, emit fileRecv

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-07-02 18:44:48 +02:00
Fredrik Johansson
a4bee36f45 Fix multi-room anchor collision via per-room derived identities
The anchor keys its clients map by peer ID. With the daemon joining one
room per trusted peer, both sessions authenticated with the same real
Ed25519 ID — the second register() overwrote the first, orphaning the
earlier room's WS connection.

Fix mirrors waste-go/internal/netmgr: derive a deterministic per-room
Ed25519 keypair from HKDF(master_private_key, room_hash). Same inputs
always produce the same derived ID; different rooms produce different
IDs. No anchor changes required.

cli/internal/crypto: add DeriveForNetwork (HKDF-SHA256, same KDF as
waste-go) so the daemon can derive stable per-room signaling identities.

cli/internal/transport: Join derives a per-room signaling identity
before calling dialSignaling. Real identity is still used for hello
verification and seal/open crypto inside the DataChannel.

pwa/src/transport/flit.ts: split PeerConn.peerId into signalingId
(anchor routing) and cryptoId (seal/open, hello). In pair-room mode
the daemon's signaling ID differs from its real ID, so connectTo and
_onFrom now use trustedPeerId as the cryptoId regardless of what the
anchor reports as the sender. offerByOrder comparison uses real IDs
(trustedPeerId ?? signalingId) so both sides agree. hello verification
now also checks the Ed25519 signature, not just the claimed ID.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-07-02 18:26:19 +02:00
Fredrik Johansson
0fe01e146c Fix file transfer, signaling reliability, and DC callback races
- wireFileRecv: replace OnMessage/OnClose channel approach with pion
  Detach API so SCTP buffers data regardless of callback timing — fixes
  0-byte files caused by pion dispatching data goroutines before OnMessage
  was registered
- yaw DC: same Detach API treatment for the control channel
- connectTo: use DetachDataChannels SettingEngine, replace stale PCs
  (Connecting/Failed/Disconnected state) instead of returning early;
  isCurrent guard in OnConnectionStateChange prevents stale-PC close
  from firing OnDisconnected
- offerByOrder: gate maybeOffer on peer ID order so only one side
  creates the yaw DC and SDP offer — fixes signaling glare causing
  triple connected (verified) logs
- pendingRecvs: promote single pendingRecv slot to map[string]*recvState
  so concurrent file offers don't overwrite each other
- peer-left: stop calling resetPeer() so active file DCs aren't closed
  before data arrives
- signaling ping: wrap conn.Ping with 10s timeout context so a dead TCP
  connection is detected within 30s rather than hanging forever
- signaling read: 3-minute read deadline forces reconnect if anchor
  silently evicts the peer from the room (idle timeout)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-07-02 17:38:48 +02:00
Fredrik Johansson
0b06500b9a Add PWA, CLI daemon, deploy tooling, and full documentation
PWA (pwa/):
- Ephemeral QR pairing and trusted device direct reconnect (no QR re-scan)
- Known devices tab as default; pairRoomName() derives deterministic room
- In-app QR scanner via native BarcodeDetector API
- Multi-file send/receive with offer queue and Accept all
- Auto-download on receipt, real-time send/receive progress bars
- Trusted peer nicknames, rename, forget
- Terminal aesthetic: #080808 bg, #00e87a accent, JetBrains Mono
- manifest.json corrected (SVG icon, theme_color, share_target)
- Apple PWA meta tags for home screen install

CLI (cli/):
- flit send / flit recv: ephemeral one-shot transfer with terminal QR
- flit daemon: persistent receiver for trusted peers from ~/.flit/daemon.toml
  - TOML config: signal_url, turn_url, download_dir, [[peers]]
  - One goroutine per peer, exponential backoff reconnect (2s→30s cap)
  - transport.PairRoomName() and Session.OnDisconnected added
- Anchor/TURN config via FLIT_SIGNAL_URL / FLIT_TURN_URL env vars (no hardcoded URLs)

Deploy:
- build-pwa.sh, deploy-pwa.sh / serve-pwa.sh templates in README (gitignored)
- .gitea/workflows/build.yml: PWA build on v* tag, Gitea release artifact
- pwa/public/config.js gitignored; config.js.example committed
- .env.example for CLI env vars

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-07-01 15:34:53 +02:00
Fredrik Johansson
5050ad5e79 Scaffold flit: PWA + Go CLI for ephemeral E2E file transfer
Ports the yaw/2.1 identity/signaling/WebRTC transport from waste-go to
both a browser PWA (with QR pairing and Web Share Target) and a headless
Go CLI, trimmed to 1:1 ephemeral file transfer only.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-06-30 19:23:04 +02:00