device-manifest.test.ts

1import { beforeAll, describe, expect, it } from "vitest";2import {3  buildSignedDeviceManifest,4  canonicalise,5  type DeviceManifestError,6  verifyDeviceManifest,7} from "./device-manifest";8import { deriveSyncSigningKeypair } from "./legacy-identity-derivation.test-support";9import {10  DEVICE_MANIFEST_FRESHNESS_MS,11  DEVICE_MANIFEST_VERSION,12  DEVICE_REVOCATION_RECORD_VERSION,13  type ManifestDeviceEntry,14} from "./sync-types";1516const MASTER_KEY = new Uint8Array(32).fill(0xab);17const ISSUER_DEVICE_ID = "11111111-1111-4111-8111-111111111111";18const PEER_DEVICE_ID = "22222222-2222-4222-8222-222222222222";1920function entry(): ManifestDeviceEntry {21  return {22    deviceId: PEER_DEVICE_ID,23    deviceName: "June's Pixel 9",24    deviceType: "android",25    longTermPublicKeyHex: "a".repeat(64),26    signingPublicKeyHex: "b".repeat(64),27    relayUrl: "wss://relay.peachpasswords.com",28    pairedAt: 1_700_000_000_000,29    vouchDepth: 0,30  };31}3233describe("canonicalise", () => {34  it("sorts object keys deterministically", () => {35    const a = canonicalise({ b: 2, a: 1 });36    const b = canonicalise({ a: 1, b: 2 });37    expect(a).toBe(b);38    expect(a).toBe('{"a":1,"b":2}');39  });4041  it("serialises nested arrays of objects in order", () => {42    expect(canonicalise([{ y: 2, x: 1 }, { z: 3 }])).toBe('[{"x":1,"y":2},{"z":3}]');43  });44});4546describe("device manifest sign+verify round trip", () => {47  let signingPrivateKey: CryptoKey;48  let signingPubkey: Uint8Array;4950  beforeAll(async () => {51    const kp = await deriveSyncSigningKeypair(MASTER_KEY, ISSUER_DEVICE_ID);52    signingPrivateKey = kp.privateKey;53    signingPubkey = kp.publicKeyRaw;54  });5556  it("derives a stable 32-byte Ed25519 public key", () => {57    expect(signingPubkey.length).toBe(32);58  });5960  it("signs and verifies a fresh manifest", async () => {61    const m = await buildSignedDeviceManifest(62      ISSUER_DEVICE_ID,63      [entry()],64      signingPrivateKey,65    );66    expect(m.body.manifestVersion).toBe(DEVICE_MANIFEST_VERSION);67    expect(m.body.issuerDeviceId).toBe(ISSUER_DEVICE_ID);68    expect(m.signatureHex).toMatch(/^[0-9a-f]{128}$/);69    const body = await verifyDeviceManifest(m, signingPubkey);70    expect(body.devices).toHaveLength(1);71    expect(body.devices[0].deviceId).toBe(PEER_DEVICE_ID);72  });7374  it("rejects a stale manifest", async () => {75    const now = Date.now();76    const m = await buildSignedDeviceManifest(77      ISSUER_DEVICE_ID,78      [entry()],79      signingPrivateKey,80      { now: now - DEVICE_MANIFEST_FRESHNESS_MS - 1_000 },81    );82    await expect(verifyDeviceManifest(m, signingPubkey, { now })).rejects.toMatchObject({83      kind: "freshness",84    } as DeviceManifestError);85  });8687  it("rejects a forged signature", async () => {88    const m = await buildSignedDeviceManifest(89      ISSUER_DEVICE_ID,90      [entry()],91      signingPrivateKey,92    );93    // Flip one byte of the signature — must fail verification.94    const sig = m.signatureHex;95    const flipped =96      sig.slice(0, 2) +97      ((parseInt(sig.slice(2, 4), 16) ^ 0xff).toString(16).padStart(2, "0")) +98      sig.slice(4);99    await expect(100      verifyDeviceManifest({ ...m, signatureHex: flipped }, signingPubkey),101    ).rejects.toMatchObject({ kind: "signature" } as DeviceManifestError);102  });103104  it("rejects a body tampered after signing", async () => {105    const m = await buildSignedDeviceManifest(106      ISSUER_DEVICE_ID,107      [entry()],108      signingPrivateKey,109    );110    const tampered = {111      ...m,112      body: {113        ...m.body,114        devices: [{ ...entry(), deviceName: "different-name" }],115      },116    };117    await expect(verifyDeviceManifest(tampered, signingPubkey)).rejects.toMatchObject({118      kind: "signature",119    } as DeviceManifestError);120  });121122  it("rejects an unknown manifest version", async () => {123    const m = await buildSignedDeviceManifest(124      ISSUER_DEVICE_ID,125      [entry()],126      signingPrivateKey,127    );128    const future = { ...m, body: { ...m.body, manifestVersion: 0x99 } };129    await expect(verifyDeviceManifest(future, signingPubkey)).rejects.toMatchObject({130      kind: "version",131    } as DeviceManifestError);132  });133134  it("derives the same keypair across calls (determinism)", async () => {135    const kp2 = await deriveSyncSigningKeypair(MASTER_KEY, ISSUER_DEVICE_ID);136    expect(Array.from(kp2.publicKeyRaw)).toEqual(Array.from(signingPubkey));137  });138});139140describe("manifest canonical form — cross-platform KAT", () => {141  // Pinned byte-for-byte against peach-android's142  // `canonicalDeviceManifestBody`. If either side reorders a key, renames a143  // field, or changes number formatting, this string moves and the two stop144  // verifying each other's signatures — the exact silent divergence the145  // manifest version guards. Keep this identical to the Android vector.146  const CANONICAL =147    '{"devices":[{"deviceId":"peer-1","deviceName":"Peer One","deviceType":"android",' +148    '"longTermPublicKeyHex":"' + "aa".repeat(32) + '","pairedAt":1700000000001,' +149    '"relayUrl":"wss://relay.peachpasswords.com",' +150    '"signingPublicKeyHex":"' + "bb".repeat(32) + '","vouchDepth":0,"wsPort":49142}],' +151    '"issuedAt":1700000000000,"issuerDeviceId":"issuer-1","manifestVersion":5,' +152    '"revoked":[{"deviceId":"gone-1","longTermPublicKeyHex":"' + "cc".repeat(32) + '",' +153    '"recordVersion":2,"revokedAt":1700000000002,"revokedByDeviceId":"issuer-1",' +154    '"signatureHex":""}]}';155156  it("canonicalises a manifest body carrying a revocation to the pinned string", () => {157    expect(158      canonicalise({159        manifestVersion: DEVICE_MANIFEST_VERSION,160        issuerDeviceId: "issuer-1",161        issuedAt: 1_700_000_000_000,162        devices: [163          {164            deviceId: "peer-1",165            deviceName: "Peer One",166            deviceType: "android",167            longTermPublicKeyHex: "aa".repeat(32),168            signingPublicKeyHex: "bb".repeat(32),169            pairedAt: 1_700_000_000_001,170            relayUrl: "wss://relay.peachpasswords.com",171            wsPort: 49142,172            vouchDepth: 0,173          },174        ],175        revoked: [176          {177            deviceId: "gone-1",178            longTermPublicKeyHex: "cc".repeat(32),179            recordVersion: DEVICE_REVOCATION_RECORD_VERSION,180            revokedAt: 1_700_000_000_002,181            revokedByDeviceId: "issuer-1",182            signatureHex: "",183          },184        ],185      }),186    ).toBe(CANONICAL);187  });188});189190describe("canonicalise — null fields are omitted (cross-platform parity)", () => {191  // Android's manifestEntryMap only inserts wsPort / relayUrl when they are192  // non-null. Match that on the browser side so the manifest signed by193  // Android verifies against the canonical bytes the browser recomputes.194  // Without this, the wire would carry "wsPort":null and the browser would195  // include it in the canonical bytes while Android would omit it — the196  // two signatures would never agree even on a legitimate manifest.197  it("omits null wsPort and null relayUrl at the device-entry level", () => {198    const a = canonicalise({199      deviceId: "peer-1",200      deviceName: "Peer One",201      deviceType: "extension",202      longTermPublicKeyHex: "aa".repeat(32),203      signingPublicKeyHex: "bb".repeat(32),204      pairedAt: 1_700_000_000_000,205      wsPort: null,206      relayUrl: null,207    });208    const b = canonicalise({209      deviceId: "peer-1",210      deviceName: "Peer One",211      deviceType: "extension",212      longTermPublicKeyHex: "aa".repeat(32),213      signingPublicKeyHex: "bb".repeat(32),214      pairedAt: 1_700_000_000_000,215    });216    expect(a).toBe(b);217    expect(a).not.toContain("wsPort");218    expect(a).not.toContain("relayUrl");219  });220221  it("keeps non-null wsPort and relayUrl", () => {222    const got = canonicalise({223      deviceId: "peer-1",224      deviceName: "Peer One",225      deviceType: "extension",226      longTermPublicKeyHex: "aa".repeat(32),227      signingPublicKeyHex: "bb".repeat(32),228      pairedAt: 1_700_000_000_000,229      wsPort: 49142,230      relayUrl: "wss://relay.peachpasswords.com",231    });232    expect(got).toContain('"wsPort":49142');233    expect(got).toContain('"relayUrl":"wss://relay.peachpasswords.com"');234  });235236  it("preserves wsPort:0 in canonical bytes (Android sends 0 as no-port sentinel)", () => {237    const got = canonicalise({238      deviceId: "peer-1",239      deviceName: "Peer One",240      deviceType: "extension",241      longTermPublicKeyHex: "aa".repeat(32),242      signingPublicKeyHex: "bb".repeat(32),243      pairedAt: 1_700_000_000_000,244      wsPort: 0,245    });246    expect(got).toContain('"wsPort":0');247  });248});249250describe("verifyDeviceManifest accepts wsPort:null", () => {251  it("does not reject wsPort:null on the wire (Android nullable Int → JSON null)", async () => {252    const kp = await deriveSyncSigningKeypair(MASTER_KEY, ISSUER_DEVICE_ID);253    // Build a valid manifest first, then inject wsPort:null into the body254    // to simulate what Android puts on the wire (nullable Int serialised as255    // JSON null). The canonicaliser strips null, so the signature still256    // verifies — but the validator must not throw on the raw parsed body.257    const m = await buildSignedDeviceManifest(ISSUER_DEVICE_ID, [entry()], kp.privateKey);258    (m.body.devices[0] as unknown as Record<string, unknown>).wsPort = null;259    const body = await verifyDeviceManifest(m, kp.publicKeyRaw);260    expect(body.devices).toHaveLength(1);261  });262});263264describe("device name bound", () => {265  it("caps oversized device names during build/normalise", async () => {266    const kp = await deriveSyncSigningKeypair(MASTER_KEY, ISSUER_DEVICE_ID);267    const m = await buildSignedDeviceManifest(268      ISSUER_DEVICE_ID,269      [{ ...entry(), deviceName: "D".repeat(200) }],270      kp.privateKey,271    );272    const body = await verifyDeviceManifest(m, kp.publicKeyRaw);273    expect(body.devices[0].deviceName).toBe("D".repeat(64));274  });275});