9d3dbcecaf
WS handshake is now authenticated end-to-end. The broker proves that
every connected peer actually holds the secret key for the pubkey
they claim as identity — not just that they know the pubkey.
wire format change:
{type:"hello", meshId, memberId, pubkey, sessionId, pid, cwd,
timestamp, signature}
where signature = ed25519_sign(canonical, secretKey)
and canonical = `${meshId}|${memberId}|${pubkey}|${timestamp}`
broker verifies on every hello:
1. timestamp within ±60s of broker clock → else close(1008, timestamp_skew)
2. pubkey is 64 hex chars, signature is 128 hex chars → else malformed
3. crypto_sign_verify_detached(signature, canonical, pubkey) → else bad_signature
4. (existing) mesh.member row exists for (meshId, pubkey) → else unauthorized
All rejection paths close the WS with code 1008 + structured error
message + metrics counter increment (connections_rejected_total by
reason).
new modules:
- apps/broker/src/crypto.ts: canonicalHello, verifyHelloSignature,
HELLO_SKEW_MS constant
- apps/cli/src/crypto/hello-sig.ts: matching signHello helper
clients updated:
- apps/cli/src/ws/client.ts: signs hello before send
- apps/broker/scripts/{peer-a,peer-b}.ts (smoke-test): sign hellos
with seed-provided secret keys
new regression tests — tests/hello-signature.test.ts (7):
- valid signature accepted
- bad signature (signed with wrong key) rejected
- timestamp too old rejected (>60s)
- timestamp too far in future rejected (>60s)
- tampered canonical field (different meshId at verify time) rejected
- malformed hex pubkey rejected
- malformed signature length rejected
verified live:
- apps/broker/scripts/smoke-test.sh: full hello+ack+send+push flow
- apps/cli/scripts/roundtrip.ts: signed hello + encrypted message
- 55/55 tests pass
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
84 lines
2.3 KiB
TypeScript
84 lines
2.3 KiB
TypeScript
#!/usr/bin/env bun
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/**
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* Smoke-test peer A (sender).
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*
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* Reads the seed JSON from /tmp/smoke-seed.json, connects to the
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* broker, sends hello, then sends one direct message to peer B.
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* Exits after 5s whether or not it gets anything back.
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*/
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import { readFileSync } from "node:fs";
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import sodium from "libsodium-wrappers";
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import WebSocket from "ws";
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const seed = JSON.parse(readFileSync("/tmp/smoke-seed.json", "utf-8")) as {
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meshId: string;
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peerA: { memberId: string; pubkey: string; secretKey: string };
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peerB: { memberId: string; pubkey: string; secretKey: string };
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};
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const BROKER = process.env.BROKER_WS_URL ?? "ws://localhost:7900/ws";
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const ws = new WebSocket(BROKER);
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let helloAcked = false;
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ws.on("open", async () => {
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await sodium.ready;
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const timestamp = Date.now();
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const canonical = `${seed.meshId}|${seed.peerA.memberId}|${seed.peerA.pubkey}|${timestamp}`;
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const signature = sodium.to_hex(
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sodium.crypto_sign_detached(
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sodium.from_string(canonical),
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sodium.from_hex(seed.peerA.secretKey),
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),
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);
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console.log("[peer-a] connected, sending signed hello");
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ws.send(
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JSON.stringify({
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type: "hello",
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meshId: seed.meshId,
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memberId: seed.peerA.memberId,
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pubkey: seed.peerA.pubkey,
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sessionId: "peer-a-session",
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pid: process.pid,
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cwd: "/tmp/peer-a",
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timestamp,
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signature,
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}),
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);
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});
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ws.on("message", (raw) => {
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const msg = JSON.parse(raw.toString());
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console.log("[peer-a] recv:", JSON.stringify(msg));
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if (!helloAcked) {
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// Broker doesn't currently ack hello explicitly; first message we
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// get is a push OR error. Assume success and fire our send after
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// a short delay.
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}
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});
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ws.on("error", (e) => console.error("[peer-a] error:", e.message));
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ws.on("close", () => console.log("[peer-a] closed"));
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// After a short delay to let hello complete, send the test message.
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setTimeout(() => {
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console.log("[peer-a] sending direct message to peer-b");
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ws.send(
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JSON.stringify({
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type: "send",
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targetSpec: seed.peerB.pubkey,
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priority: "now",
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nonce: "fake-nonce-aaa",
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ciphertext: "hello-from-a",
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id: "msg-1",
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}),
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);
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}, 500);
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setTimeout(() => {
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console.log("[peer-a] done, closing");
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ws.close();
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process.exit(0);
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}, 5000);
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