feat: implement account passkey functionality

- Added functions for managing account passkeys including creation, listing, updating, and deletion.
- Introduced login methods using account passkeys with options for direct unlock and login-only modes.
- Enhanced error handling and response parsing for passkey-related API calls.
- Updated UI styles for account passkey management components.
- Added new translations for account passkey features in multiple languages.
- Modified network status handling to improve service reachability checks.

src/handlers/account-passkeys.ts

@@ -0,0 +1,488 @@
+import {
+  generateAuthenticationOptions,
+  generateRegistrationOptions,
+  verifyAuthenticationResponse,
+  verifyRegistrationResponse,
+} from '@simplewebauthn/server';
+import type { AccountPasskeyChallengeScope, AccountPasskeyCredential, Env, User } from '../types';
+import { StorageService } from '../services/storage';
+import { AuthService } from '../services/auth';
+import { errorResponse, identityErrorResponse, jsonResponse } from '../utils/response';
+import { generateUUID } from '../utils/uuid';
+import { bytesToBase64Url } from '../utils/passkey';
+import {
+  accountPasskeyCredentialToResponse,
+  accountPasskeyPrfStatus,
+  accountPasskeyTokenTtlMs,
+  buildWebAuthnPrfOption,
+  createAccountPasskeyToken,
+  getAccountPasskeyRpConfig,
+  isSerializedEncString,
+  normalizeAccountPasskeyName,
+  normalizeAuthenticationResponse,
+  normalizeRegistrationResponse,
+  normalizeTransports,
+  sha256Base64Url,
+  toSimpleWebAuthnCredential,
+  userHandleToUserId,
+  userIdToWebAuthnUserId,
+  verifyAccountPasskeyToken,
+} from '../utils/account-passkeys';
+import { auditRequestMetadata, safeWriteAuditEvent } from '../services/audit-events';
+
+const MAX_ACCOUNT_PASSKEYS = 5;
+
+function parseBodyObject(body: unknown): Record<string, any> {
+  return body && typeof body === 'object' ? body as Record<string, any> : {};
+}
+
+async function readJsonBody(request: Request): Promise<Record<string, any> | null> {
+  try {
+    return parseBodyObject(await request.json());
+  } catch {
+    return null;
+  }
+}
+
+async function verifyUserSecret(
+  env: Env,
+  user: User,
+  body: Record<string, any>
+): Promise<boolean> {
+  const secret = String(body.masterPasswordHash || body.master_password_hash || body.secret || body.password || '').trim();
+  if (!secret) return false;
+  const storedHash = String(user.masterPasswordHash || '').trim();
+  if (!storedHash) return false;
+  const auth = new AuthService(env);
+  return auth.verifyPassword(secret, storedHash, user.email);
+}
+
+function logAccountPasskeyHandlerError(stage: string, error: unknown, details: Record<string, unknown> = {}): void {
+  const err = error instanceof Error ? error : null;
+  console.error('Account passkey handler failed', {
+    stage,
+    name: err?.name || typeof error,
+    message: err?.message || String(error),
+    stack: err?.stack,
+    ...details,
+  });
+}
+
+function passkeySetupStageMessage(stage: string): string {
+  if (stage === 'verify_master_password') return 'verifying master password';
+  if (stage === 'load_existing_credentials') return 'loading existing passkeys';
+  if (stage === 'generate_options') return 'generating passkey options';
+  if (stage === 'save_challenge') return 'saving passkey challenge';
+  if (stage === 'create_token') return 'creating passkey challenge token';
+  return 'preparing passkey setup';
+}
+
+function hasCompletePrfKeySet(body: Record<string, any>): boolean {
+  return !!(body.encryptedUserKey && body.encryptedPublicKey && body.encryptedPrivateKey);
+}
+
+function readPrfKeySet(body: Record<string, any>): {
+  encryptedUserKey: string | null;
+  encryptedPublicKey: string | null;
+  encryptedPrivateKey: string | null;
+} {
+  if (!hasCompletePrfKeySet(body)) {
+    return { encryptedUserKey: null, encryptedPublicKey: null, encryptedPrivateKey: null };
+  }
+  const encryptedUserKey = String(body.encryptedUserKey).trim();
+  const encryptedPublicKey = String(body.encryptedPublicKey).trim();
+  const encryptedPrivateKey = String(body.encryptedPrivateKey).trim();
+  if (!isSerializedEncString(encryptedUserKey) || !isSerializedEncString(encryptedPublicKey) || !isSerializedEncString(encryptedPrivateKey)) {
+    throw new Error('Invalid encrypted key set');
+  }
+  return { encryptedUserKey, encryptedPublicKey, encryptedPrivateKey };
+}
+
+async function saveChallenge(
+  storage: StorageService,
+  scope: AccountPasskeyChallengeScope,
+  challenge: string,
+  userId: string | null
+): Promise<void> {
+  const now = Date.now();
+  await storage.saveAccountPasskeyChallenge({
+    challengeHash: await sha256Base64Url(challenge),
+    scope,
+    userId,
+    expiresAt: now + accountPasskeyTokenTtlMs(scope),
+    usedAt: null,
+    createdAt: now,
+  });
+}
+
+export async function handleGetAccountPasskeyAssertionOptions(request: Request, env: Env): Promise<Response> {
+  const storage = new StorageService(env.DB);
+  const { rpId } = getAccountPasskeyRpConfig(request, env);
+  const options = await generateAuthenticationOptions({
+    rpID: rpId,
+    allowCredentials: [],
+    userVerification: 'required',
+    timeout: 60000,
+  });
+  await saveChallenge(storage, 'Authentication', options.challenge, null);
+  const token = await createAccountPasskeyToken(env, {
+    scope: 'Authentication',
+    challenge: options.challenge,
+    userId: null,
+    rpId,
+  });
+  return jsonResponse({ options, token, object: 'webAuthnLoginAssertionOptions', Object: 'webAuthnLoginAssertionOptions' });
+}
+
+export async function assertAccountPasskeyCredential(
+  request: Request,
+  env: Env,
+  storage: StorageService,
+  input: {
+    token: string;
+    deviceResponse: unknown;
+    scope: 'Authentication' | 'UpdateKeySet';
+    expectedUserId?: string | null;
+  }
+): Promise<{ user: User; credential: AccountPasskeyCredential }> {
+  const payload = await verifyAccountPasskeyToken(env, input.token, input.scope);
+  if (!payload) {
+    throw new Error('Passkey challenge token is invalid or expired');
+  }
+  if (input.expectedUserId !== undefined && payload.userId !== input.expectedUserId) {
+    throw new Error('Passkey challenge token does not match this user');
+  }
+
+  const response = normalizeAuthenticationResponse(input.deviceResponse);
+  if (!response) {
+    throw new Error('Invalid passkey assertion response');
+  }
+
+  const challengeHash = await sha256Base64Url(payload.challenge);
+  const consumed = await storage.consumeAccountPasskeyChallenge(
+    challengeHash,
+    input.scope,
+    payload.userId,
+    Date.now()
+  );
+  if (!consumed) {
+    throw new Error('Passkey challenge has expired or was already used');
+  }
+
+  const credential = await storage.getAccountPasskeyCredentialByCredentialId(response.rawId);
+  if (!credential) {
+    throw new Error('Passkey is not registered for this server');
+  }
+  if (payload.userId && credential.userId !== payload.userId) {
+    throw new Error('Passkey does not belong to this user');
+  }
+
+  const userHandleUserId = userHandleToUserId(response.response.userHandle);
+  const resolvedUserId = payload.userId || userHandleUserId || credential.userId;
+  if (!resolvedUserId || resolvedUserId !== credential.userId) {
+    throw new Error('Passkey user handle does not match this credential');
+  }
+
+  const user = await storage.getUserById(resolvedUserId);
+  if (!user || user.status !== 'active') {
+    throw new Error('Passkey user is not available');
+  }
+
+  const { origins } = getAccountPasskeyRpConfig(request, env);
+  const verification = await verifyAuthenticationResponse({
+    response,
+    expectedChallenge: payload.challenge,
+    expectedOrigin: origins,
+    expectedRPID: payload.rpId,
+    credential: toSimpleWebAuthnCredential(credential),
+    requireUserVerification: true,
+    advancedFIDOConfig: { userVerification: 'required' },
+  });
+  if (!verification.verified || !verification.authenticationInfo.userVerified) {
+    throw new Error('Passkey assertion could not be verified');
+  }
+
+  await storage.updateAccountPasskeyCounter(
+    credential.userId,
+    credential.credentialId,
+    verification.authenticationInfo.newCounter,
+    new Date().toISOString()
+  );
+  credential.counter = verification.authenticationInfo.newCounter;
+  return { user, credential };
+}
+
+export async function handleGetAccountPasskeyCredentials(request: Request, env: Env, userId: string): Promise<Response> {
+  const storage = new StorageService(env.DB);
+  const credentials = await storage.getAccountPasskeyCredentialsByUserId(userId);
+  return jsonResponse({
+    data: credentials.map(accountPasskeyCredentialToResponse),
+    Data: credentials.map(accountPasskeyCredentialToResponse),
+    object: 'list',
+    Object: 'list',
+    continuationToken: null,
+    ContinuationToken: null,
+  });
+}
+
+export async function handleGetAccountPasskeyAttestationOptions(request: Request, env: Env, userId: string, user: User): Promise<Response> {
+  const body = await readJsonBody(request);
+  if (!body) return errorResponse('Invalid request payload', 400);
+
+  let stage = 'verify_master_password';
+  try {
+    if (!(await verifyUserSecret(env, user, body))) {
+      return errorResponse('Master password verification failed', 400);
+    }
+
+    const storage = new StorageService(env.DB);
+    stage = 'load_existing_credentials';
+    const credentials = await storage.getAccountPasskeyCredentialsByUserId(userId);
+    if (credentials.length >= MAX_ACCOUNT_PASSKEYS) {
+      return errorResponse('Maximum passkey count reached', 400);
+    }
+
+    const { rpId, rpName } = getAccountPasskeyRpConfig(request, env);
+    stage = 'generate_options';
+    const options = await generateRegistrationOptions({
+      rpID: rpId,
+      rpName,
+      userID: Uint8Array.from(userIdToWebAuthnUserId(user.id)),
+      userName: user.email,
+      userDisplayName: user.name || user.email,
+      attestationType: 'none',
+      timeout: 60000,
+      excludeCredentials: credentials.map((credential) => ({
+        id: credential.credentialId,
+        transports: (credential.transports || undefined) as any,
+      })),
+      authenticatorSelection: {
+        residentKey: 'required',
+        requireResidentKey: true,
+        userVerification: 'required',
+      },
+    });
+    (options as any).extensions = {
+      ...((options as any).extensions || {}),
+      prf: {},
+    };
+    stage = 'save_challenge';
+    await saveChallenge(storage, 'CreateCredential', options.challenge, userId);
+    stage = 'create_token';
+    const token = await createAccountPasskeyToken(env, {
+      scope: 'CreateCredential',
+      challenge: options.challenge,
+      userId,
+      rpId,
+    });
+    return jsonResponse({ options, token, object: 'webauthnCredentialCreateOptions', Object: 'webauthnCredentialCreateOptions' });
+  } catch (error) {
+    logAccountPasskeyHandlerError(stage, error, { userId });
+    return errorResponse(`Passkey setup failed while ${passkeySetupStageMessage(stage)}`, 500);
+  }
+}
+
+export async function handleGetAccountPasskeyUpdateAssertionOptions(request: Request, env: Env, userId: string, user: User): Promise<Response> {
+  const body = await readJsonBody(request);
+  if (!body) return errorResponse('Invalid request payload', 400);
+  if (!(await verifyUserSecret(env, user, body))) {
+    return errorResponse('Master password verification failed', 400);
+  }
+
+  const storage = new StorageService(env.DB);
+  let credentials = await storage.getAccountPasskeyCredentialsByUserId(userId);
+  const requestedId = String(body.credentialId || body.id || '').trim();
+  if (requestedId) {
+    credentials = credentials.filter((credential) => credential.id === requestedId);
+    if (!credentials.length) return errorResponse('Account passkey not found', 404);
+  }
+  if (!credentials.length) return errorResponse('No account passkeys registered', 404);
+
+  const { rpId } = getAccountPasskeyRpConfig(request, env);
+  const options = await generateAuthenticationOptions({
+    rpID: rpId,
+    allowCredentials: credentials.map((credential) => ({
+      id: credential.credentialId,
+      transports: (credential.transports || undefined) as any,
+    })),
+    userVerification: 'required',
+    timeout: 60000,
+  });
+  await saveChallenge(storage, 'UpdateKeySet', options.challenge, userId);
+  const token = await createAccountPasskeyToken(env, {
+    scope: 'UpdateKeySet',
+    challenge: options.challenge,
+    userId,
+    rpId,
+  });
+  return jsonResponse({ options, token, object: 'webAuthnLoginAssertionOptions', Object: 'webAuthnLoginAssertionOptions' });
+}
+
+export async function handleCreateAccountPasskeyCredential(request: Request, env: Env, userId: string): Promise<Response> {
+  const body = await readJsonBody(request);
+  if (!body) return errorResponse('Invalid request payload', 400);
+
+  const storage = new StorageService(env.DB);
+  const payload = await verifyAccountPasskeyToken(env, String(body.token || ''), 'CreateCredential');
+  if (!payload || payload.userId !== userId) {
+    return errorResponse('Passkey challenge token is invalid or expired', 400);
+  }
+
+  const challengeHash = await sha256Base64Url(payload.challenge);
+  const consumed = await storage.consumeAccountPasskeyChallenge(challengeHash, 'CreateCredential', userId, Date.now());
+  if (!consumed) {
+    return errorResponse('Passkey challenge has expired or was already used', 400);
+  }
+
+  const currentCount = await storage.countAccountPasskeyCredentialsByUserId(userId);
+  if (currentCount >= MAX_ACCOUNT_PASSKEYS) {
+    return errorResponse('Maximum passkey count reached', 400);
+  }
+
+  let prfKeySet: ReturnType<typeof readPrfKeySet>;
+  try {
+    prfKeySet = readPrfKeySet(body);
+  } catch {
+    return errorResponse('Invalid encrypted passkey key set', 400);
+  }
+
+  const registrationResponse = normalizeRegistrationResponse(body.deviceResponse);
+  if (!registrationResponse) {
+    return errorResponse('Invalid passkey registration response', 400);
+  }
+
+  const { origins } = getAccountPasskeyRpConfig(request, env);
+  let verification: Awaited<ReturnType<typeof verifyRegistrationResponse>>;
+  try {
+    verification = await verifyRegistrationResponse({
+      response: registrationResponse,
+      expectedChallenge: payload.challenge,
+      expectedOrigin: origins,
+      expectedRPID: payload.rpId,
+      requireUserPresence: true,
+      requireUserVerification: true,
+    });
+  } catch {
+    return errorResponse('Passkey registration could not be verified', 400);
+  }
+  if (!verification.verified) {
+    return errorResponse('Passkey registration could not be verified', 400);
+  }
+
+  const existing = await storage.getAccountPasskeyCredentialByCredentialId(verification.registrationInfo.credential.id);
+  if (existing) {
+    return errorResponse('Passkey is already registered', 409);
+  }
+
+  const now = new Date().toISOString();
+  const supportsPrf = !!body.supportsPrf || hasCompletePrfKeySet(body);
+  const transports = normalizeTransports(registrationResponse.response.transports);
+  const credential: AccountPasskeyCredential = {
+    id: generateUUID(),
+    userId,
+    name: normalizeAccountPasskeyName(body.name),
+    publicKey: bytesToBase64Url(verification.registrationInfo.credential.publicKey),
+    credentialId: verification.registrationInfo.credential.id,
+    counter: verification.registrationInfo.credential.counter,
+    type: verification.registrationInfo.credentialType || 'public-key',
+    aaGuid: verification.registrationInfo.aaguid || null,
+    transports,
+    encryptedUserKey: prfKeySet.encryptedUserKey,
+    encryptedPublicKey: prfKeySet.encryptedPublicKey,
+    encryptedPrivateKey: prfKeySet.encryptedPrivateKey,
+    supportsPrf,
+    createdAt: now,
+    updatedAt: now,
+  };
+
+  await storage.saveAccountPasskeyCredential(credential);
+  await safeWriteAuditEvent(env, {
+    actorUserId: userId,
+    action: 'account.passkey.create',
+    category: 'security',
+    level: 'info',
+    targetType: 'accountPasskey',
+    targetId: credential.id,
+    metadata: {
+      prfStatus: accountPasskeyPrfStatus(credential),
+      ...auditRequestMetadata(request),
+    },
+  });
+
+  return jsonResponse(accountPasskeyCredentialToResponse(credential));
+}
+
+export async function handleUpdateAccountPasskeyEncryption(request: Request, env: Env, userId: string): Promise<Response> {
+  const body = await readJsonBody(request);
+  if (!body) return errorResponse('Invalid request payload', 400);
+
+  let prfKeySet: ReturnType<typeof readPrfKeySet>;
+  try {
+    prfKeySet = readPrfKeySet(body);
+  } catch {
+    return errorResponse('Invalid encrypted passkey key set', 400);
+  }
+  if (!prfKeySet.encryptedUserKey || !prfKeySet.encryptedPublicKey || !prfKeySet.encryptedPrivateKey) {
+    return errorResponse('Encrypted passkey key set is required', 400);
+  }
+
+  const storage = new StorageService(env.DB);
+  let assertion: Awaited<ReturnType<typeof assertAccountPasskeyCredential>>;
+  try {
+    assertion = await assertAccountPasskeyCredential(request, env, storage, {
+      token: String(body.token || ''),
+      deviceResponse: body.deviceResponse,
+      scope: 'UpdateKeySet',
+      expectedUserId: userId,
+    });
+  } catch (error) {
+    return errorResponse(error instanceof Error ? error.message : 'Passkey assertion failed', 400);
+  }
+
+  const updated = await storage.updateAccountPasskeyEncryption(
+    userId,
+    assertion.credential.credentialId,
+    prfKeySet.encryptedUserKey,
+    prfKeySet.encryptedPublicKey,
+    prfKeySet.encryptedPrivateKey
+  );
+  if (!updated) return errorResponse('Passkey not found', 404);
+
+  await safeWriteAuditEvent(env, {
+    actorUserId: userId,
+    action: 'account.passkey.encryption.enable',
+    category: 'security',
+    level: 'info',
+    targetType: 'accountPasskey',
+    targetId: assertion.credential.id,
+    metadata: auditRequestMetadata(request),
+  });
+  return jsonResponse({ success: true });
+}
+
+export async function handleDeleteAccountPasskeyCredential(request: Request, env: Env, userId: string, credentialId: string, user: User): Promise<Response> {
+  const body = await readJsonBody(request);
+  if (!body) return errorResponse('Invalid request payload', 400);
+  if (!(await verifyUserSecret(env, user, body))) {
+    return errorResponse('Master password verification failed', 400);
+  }
+
+  const storage = new StorageService(env.DB);
+  const deleted = await storage.deleteAccountPasskeyCredential(userId, credentialId);
+  if (!deleted) return errorResponse('Passkey not found', 404);
+
+  await safeWriteAuditEvent(env, {
+    actorUserId: userId,
+    action: 'account.passkey.delete',
+    category: 'security',
+    level: 'info',
+    targetType: 'accountPasskey',
+    targetId: credentialId,
+    metadata: auditRequestMetadata(request),
+  });
+  return jsonResponse({ success: true });
+}
+
+export function buildAccountPasskeyTokenUserDecryptionOption(credential: AccountPasskeyCredential) {
+  return buildWebAuthnPrfOption(credential);
+}

src/handlers/identity.ts

@@ -15,6 +15,10 @@ import {
   buildUserDecryptionOptions,
 } from '../utils/user-decryption';
 import { auditRequestMetadata, safeWriteAuditEvent } from '../services/audit-events';
+import {
+  assertAccountPasskeyCredential,
+  buildAccountPasskeyTokenUserDecryptionOption,
+} from './account-passkeys';
 
 const TWO_FACTOR_REMEMBER_TTL_MS = 30 * 24 * 60 * 60 * 1000;
 const TWO_FACTOR_PROVIDER_AUTHENTICATOR = 0;
@@ -423,6 +427,126 @@ export async function handleToken(request: Request, env: Env): Promise<Response>
       ? withWebRefreshCookie(request, baseResponse, refreshToken)
       : baseResponse;
 
+  } else if (grantType === 'webauthn') {
+    const loginIdentifier = clientIdentifier;
+    const loginCheck = await rateLimit.checkLoginAttempt(loginIdentifier);
+    if (!loginCheck.allowed) {
+      return identityErrorResponse(
+        `Too many failed login attempts. Try again in ${Math.ceil(loginCheck.retryAfterSeconds! / 60)} minutes.`,
+        'TooManyRequests',
+        429
+      );
+    }
+
+    const token = String(body.token || '').trim();
+    let deviceResponse: unknown = body.deviceResponse;
+    if (typeof deviceResponse === 'string') {
+      try {
+        deviceResponse = JSON.parse(deviceResponse);
+      } catch {
+        return identityErrorResponse('Invalid passkey response', 'invalid_request', 400);
+      }
+    }
+    if (!token || !deviceResponse) {
+      return identityErrorResponse('Passkey token and deviceResponse are required', 'invalid_request', 400);
+    }
+
+    let asserted: Awaited<ReturnType<typeof assertAccountPasskeyCredential>>;
+    try {
+      asserted = await assertAccountPasskeyCredential(request, env, storage, {
+        token,
+        deviceResponse,
+        scope: 'Authentication',
+      });
+    } catch (error) {
+      await rateLimit.recordFailedLogin(loginIdentifier);
+      await safeWriteAuditEvent(env, {
+        actorUserId: null,
+        action: 'auth.passkey.login.failed',
+        category: 'auth',
+        level: 'warn',
+        targetType: 'accountPasskey',
+        targetId: null,
+        metadata: {
+          grantType,
+          reason: error instanceof Error ? error.message : 'assertion_failed',
+          ...auditRequestMetadata(request),
+        },
+      });
+      return identityErrorResponse('Passkey is invalid. Try again', 'invalid_grant', 400);
+    }
+
+    const { user, credential } = asserted;
+    if (user.status !== 'active') {
+      await rateLimit.recordFailedLogin(loginIdentifier);
+      return identityErrorResponse('Account is disabled', 'invalid_grant', 400);
+    }
+
+    const deviceInfo = readAuthRequestDeviceInfo(body, request);
+    const deviceSession = await resolveDeviceSession(storage, user.id, deviceInfo);
+    if (deviceSession) {
+      await storage.upsertDevice(
+        user.id,
+        deviceSession.identifier,
+        deviceInfo.deviceName,
+        deviceInfo.deviceType,
+        deviceSession.sessionStamp
+      );
+    }
+
+    await rateLimit.clearLoginAttempts(loginIdentifier);
+
+    const accessToken = await auth.generateAccessToken(user, deviceSession);
+    const refreshToken = await auth.generateRefreshToken(user.id, deviceSession);
+    const accountKeys = buildAccountKeys(user);
+    const webAuthnPrfOption = buildAccountPasskeyTokenUserDecryptionOption(credential);
+    const userDecryptionOptions = buildUserDecryptionOptions(user, webAuthnPrfOption);
+    await safeWriteAuditEvent(env, {
+      actorUserId: user.id,
+      action: 'auth.passkey.login.success',
+      category: 'auth',
+      level: 'info',
+      targetType: 'accountPasskey',
+      targetId: credential.id,
+      metadata: {
+        grantType,
+        webSession: shouldUseWebSession(request),
+        deviceIdentifier: deviceSession?.identifier ?? deviceInfo.deviceIdentifier,
+        deviceType: deviceInfo.deviceType,
+        ...auditRequestMetadata(request),
+      },
+    });
+
+    const response: TokenResponse = {
+      access_token: accessToken,
+      expires_in: LIMITS.auth.accessTokenTtlSeconds,
+      token_type: 'Bearer',
+      ...(shouldUseWebSession(request) ? { web_session: true } : { refresh_token: refreshToken }),
+      Key: user.key,
+      PrivateKey: user.privateKey,
+      AccountKeys: accountKeys,
+      accountKeys: accountKeys,
+      Kdf: user.kdfType,
+      KdfIterations: user.kdfIterations,
+      KdfMemory: user.kdfMemory,
+      KdfParallelism: user.kdfParallelism,
+      ForcePasswordReset: false,
+      ResetMasterPassword: false,
+      MasterPasswordPolicy: {
+        Object: 'masterPasswordPolicy',
+      },
+      ApiUseKeyConnector: false,
+      scope: 'api offline_access',
+      unofficialServer: true,
+      UserDecryptionOptions: userDecryptionOptions,
+      userDecryptionOptions: userDecryptionOptions,
+    };
+
+    const baseResponse = jsonResponse(response);
+    return shouldUseWebSession(request)
+      ? withWebRefreshCookie(request, baseResponse, refreshToken)
+      : baseResponse;
+
   } else if (grantType === 'client_credentials') {
     // Login with client credentials
     const clientId = body.client_id;

src/handlers/sync.ts

@@ -10,6 +10,7 @@ import {
   buildUserDecryptionOptions,
 } from '../utils/user-decryption';
 import { buildDomainsResponse } from '../services/domain-rules';
+import { buildWebAuthnPrfOption } from '../utils/account-passkeys';
 
 // CONTRACT:
 // /api/sync reuses cipherToResponse() as the single cipher response shaper.
@@ -20,13 +21,14 @@ function buildSyncCacheRequest(
   request: Request,
   userId: string,
   revisionDate: string,
+  accountPasskeyCacheTag: string,
   excludeDomains: boolean,
   excludeSends: boolean,
   preserveRepairableUris: boolean
 ): Request {
   const url = new URL(request.url);
   const cacheUrl = new URL(
-    `/__nodewarden/cache/sync/${encodeURIComponent(userId)}/${encodeURIComponent(revisionDate)}/${excludeDomains ? '1' : '0'}/${excludeSends ? '1' : '0'}/${preserveRepairableUris ? '1' : '0'}`,
+    `/__nodewarden/cache/sync/${encodeURIComponent(userId)}/${encodeURIComponent(revisionDate)}/${encodeURIComponent(accountPasskeyCacheTag)}/${excludeDomains ? '1' : '0'}/${excludeSends ? '1' : '0'}/${preserveRepairableUris ? '1' : '0'}`,
     url.origin
   );
   return new Request(cacheUrl.toString(), { method: 'GET' });
@@ -57,8 +59,19 @@ export async function handleSync(request: Request, env: Env, userId: string): Pr
     return errorResponse('User not found', 404);
   }
 
-  const revisionDate = await storage.getRevisionDate(userId);
-  const cacheRequest = buildSyncCacheRequest(request, userId, revisionDate, excludeDomains, excludeSends, preserveRepairableUris);
+  const [revisionDate, accountPasskeys] = await Promise.all([
+    storage.getRevisionDate(userId),
+    storage.getAccountPasskeyCredentialsByUserId(userId),
+  ]);
+  const accountPasskeyCacheTag = accountPasskeys
+    .map((credential) => [
+      credential.id,
+      credential.updatedAt,
+      credential.supportsPrf ? '1' : '0',
+      credential.encryptedUserKey && credential.encryptedPublicKey && credential.encryptedPrivateKey ? '1' : '0',
+    ].join(':'))
+    .join(',');
+  const cacheRequest = buildSyncCacheRequest(request, userId, revisionDate, accountPasskeyCacheTag, excludeDomains, excludeSends, preserveRepairableUris);
   const cachedResponse = await readSyncCache(cacheRequest);
   if (cachedResponse) {
     return cachedResponse;
@@ -72,7 +85,10 @@ export async function handleSync(request: Request, env: Env, userId: string): Pr
     excludeDomains ? Promise.resolve(null) : storage.getUserDomainSettings(userId),
   ]);
   const accountKeys = buildAccountKeys(user);
-  const userDecryptionOptions = buildUserDecryptionOptions(user);
+  const webAuthnPrfOptions = accountPasskeys
+    .map(buildWebAuthnPrfOption)
+    .filter((option): option is NonNullable<typeof option> => !!option);
+  const userDecryptionOptions = buildUserDecryptionOptions(user, webAuthnPrfOptions[0] || null);
 
   const profile: ProfileResponse = {
     id: user.id,
@@ -138,6 +154,8 @@ export async function handleSync(request: Request, env: Env, userId: string): Pr
       MasterPasswordUnlock: userDecryptionOptions.MasterPasswordUnlock,
       TrustedDeviceOption: null,
       KeyConnectorOption: null,
+      WebAuthnPrfOption: webAuthnPrfOptions[0] || null,
+      WebAuthnPrfOptions: webAuthnPrfOptions,
       Object: 'userDecryption',
     },
     UserDecryptionOptions: userDecryptionOptions,

src/router-authenticated.ts

@@ -66,6 +66,14 @@ import {
 import { handleAuthenticatedDeviceRoute } from './router-devices';
 import { handleAdminRoute } from './router-admin';
 import { handleGetDomains, handleUpdateDomains } from './handlers/domains';
+import {
+  handleCreateAccountPasskeyCredential,
+  handleDeleteAccountPasskeyCredential,
+  handleGetAccountPasskeyAttestationOptions,
+  handleGetAccountPasskeyCredentials,
+  handleGetAccountPasskeyUpdateAssertionOptions,
+  handleUpdateAccountPasskeyEncryption,
+} from './handlers/account-passkeys';
 
 export async function handleAuthenticatedRoute(
   request: Request,
@@ -131,6 +139,28 @@ export async function handleAuthenticatedRoute(
     return handleRotateApiKey(request, env, userId);
   }
 
+  if (path === '/api/webauthn' || path === '/webauthn') {
+    if (method === 'GET') return handleGetAccountPasskeyCredentials(request, env, userId);
+    if (method === 'POST') return handleCreateAccountPasskeyCredential(request, env, userId);
+    if (method === 'PUT') return handleUpdateAccountPasskeyEncryption(request, env, userId);
+    return errorResponse('Method not allowed', 405);
+  }
+
+  if ((path === '/api/webauthn/attestation-options' || path === '/webauthn/attestation-options') && method === 'POST') {
+    return handleGetAccountPasskeyAttestationOptions(request, env, userId, currentUser);
+  }
+
+  if ((path === '/api/webauthn/assertion-options' || path === '/webauthn/assertion-options') && method === 'POST') {
+    return handleGetAccountPasskeyUpdateAssertionOptions(request, env, userId, currentUser);
+  }
+
+  const accountPasskeyDeleteMatch =
+    path.match(/^\/api\/webauthn\/([^/]+)\/delete$/i) ||
+    path.match(/^\/webauthn\/([^/]+)\/delete$/i);
+  if (accountPasskeyDeleteMatch && method === 'POST') {
+    return handleDeleteAccountPasskeyCredential(request, env, userId, accountPasskeyDeleteMatch[1], currentUser);
+  }
+
   if (path === '/api/sync' && method === 'GET') {
     return handleSync(request, env, userId);
   }

src/router-public.ts

@@ -9,6 +9,7 @@ import {
 } from './handlers/sends';
 import { handleKnownDevice } from './handlers/devices';
 import { handleToken, handlePrelogin, handleRevocation } from './handlers/identity';
+import { handleGetAccountPasskeyAssertionOptions } from './handlers/account-passkeys';
 import {
   handleRegister,
   handleGetPasswordHint,
@@ -422,6 +423,12 @@ export async function handlePublicRoute(
     return handlePrelogin(request, env);
   }
 
+  if (path === '/identity/accounts/webauthn/assertion-options' && method === 'GET') {
+    const blocked = await enforcePublicRateLimit('public-sensitive', LIMITS.rateLimit.sensitivePublicRequestsPerMinute);
+    if (blocked) return blocked;
+    return handleGetAccountPasskeyAssertionOptions(request, env);
+  }
+
   if ((path === '/identity/accounts/recover-2fa' || path === '/api/accounts/recover-2fa') && method === 'POST') {
     return handleRecoverTwoFactor(request, env);
   }

src/services/audit-events.ts

@@ -66,6 +66,7 @@ const ALLOWED_METADATA_KEYS = new Set([
   'skippedReason',
   'replaceExisting',
   'provider',
+  'prfStatus',
   'fileName',
   'fileBytes',
   'bytes',

src/services/backup-archive.ts

@@ -67,6 +67,7 @@ export interface BackupPayload {
     folders: SqlRow[];
     ciphers: SqlRow[];
     attachments: SqlRow[];
+    webauthn_credentials?: SqlRow[];
   };
 }
 
@@ -300,6 +301,7 @@ export function validateBackupPayloadContents(
   const folderRows = ensureRowArray(payload.db.folders, 'folders');
   const cipherRows = ensureRowArray(payload.db.ciphers, 'ciphers');
   const attachmentRows = ensureRowArray(payload.db.attachments, 'attachments');
+  const accountPasskeyRows = ensureRowArray(payload.db.webauthn_credentials || [], 'webauthn_credentials');
   const externalAttachmentKeys = new Set<string>(
     options.allowExternalAttachmentBlobs
       ? (payload.manifest.attachmentBlobs || []).map((item) => `attachments/${String(item.cipherId || '').trim()}/${String(item.attachmentId || '').trim()}.bin`)
@@ -372,6 +374,22 @@ export function validateBackupPayloadContents(
       throw new Error(`Backup archive is missing required file: attachments/${cipherId}/${id}.bin`);
     }
   }
+
+  const accountPasskeyIds = new Set<string>();
+  const accountPasskeyCredentialIds = new Set<string>();
+  for (const row of accountPasskeyRows) {
+    const id = String(row.id || '').trim();
+    const userId = String(row.user_id || '').trim();
+    const credentialId = String(row.credential_id || '').trim();
+    const publicKey = String(row.public_key || '').trim();
+    if (!id || !userIds.has(userId) || !credentialId || !publicKey) {
+      throw new Error('Backup archive contains an invalid account passkey row');
+    }
+    if (accountPasskeyIds.has(id)) throw new Error(`Backup archive contains duplicate account passkey id: ${id}`);
+    if (accountPasskeyCredentialIds.has(credentialId)) throw new Error(`Backup archive contains duplicate account passkey credential id: ${credentialId}`);
+    accountPasskeyIds.add(id);
+    accountPasskeyCredentialIds.add(credentialId);
+  }
 }
 
 export async function buildBackupArchive(
@@ -390,7 +408,7 @@ export async function buildBackupArchive(
     includeAttachments,
   });
   const encoder = new TextEncoder();
-  const [configRows, userRows, domainSettingsRows, revisionRows, folderRows, cipherRows, attachmentRows] = await Promise.all([
+  const [configRows, userRows, domainSettingsRows, revisionRows, folderRows, cipherRows, attachmentRows, accountPasskeyRows] = await Promise.all([
     queryRows(env.DB, 'SELECT key, value FROM config ORDER BY key ASC'),
     queryRows(env.DB, 'SELECT id, email, name, master_password_hint, master_password_hash, key, private_key, public_key, kdf_type, kdf_iterations, kdf_memory, kdf_parallelism, security_stamp, role, status, verify_devices, totp_secret, totp_recovery_code, created_at, updated_at FROM users ORDER BY created_at ASC'),
     queryRows(env.DB, 'SELECT user_id, equivalent_domains, custom_equivalent_domains, excluded_global_equivalent_domains, updated_at FROM domain_settings ORDER BY user_id ASC'),
@@ -398,6 +416,7 @@ export async function buildBackupArchive(
     queryRows(env.DB, 'SELECT id, user_id, name, created_at, updated_at FROM folders ORDER BY created_at ASC'),
     queryRows(env.DB, 'SELECT id, user_id, type, folder_id, name, notes, favorite, data, reprompt, key, created_at, updated_at, archived_at, deleted_at FROM ciphers ORDER BY created_at ASC'),
     queryRows(env.DB, 'SELECT id, cipher_id, file_name, size, size_name, key FROM attachments ORDER BY cipher_id ASC, id ASC'),
+    queryRows(env.DB, 'SELECT id, user_id, name, public_key, credential_id, counter, type, aa_guid, transports, encrypted_user_key, encrypted_public_key, encrypted_private_key, supports_prf, created_at, updated_at FROM webauthn_credentials ORDER BY created_at ASC'),
   ]);
   const exportedConfigRows = sanitizeConfigRowsForExport(configRows);
   const exportedAttachmentRows = includeAttachments ? attachmentRows : [];
@@ -425,6 +444,7 @@ export async function buildBackupArchive(
       folders: folderRows.length,
       ciphers: cipherRows.length,
       attachments: exportedAttachmentRows.length,
+      webauthn_credentials: accountPasskeyRows.length,
     },
     includes: {
       attachments: includeAttachments,
@@ -447,6 +467,7 @@ export async function buildBackupArchive(
       folders: folderRows,
       ciphers: cipherRows,
       attachments: exportedAttachmentRows,
+      webauthn_credentials: accountPasskeyRows,
     }, null, BACKUP_JSON_INDENT)),
   };
 

src/services/backup-import.ts

@@ -24,6 +24,7 @@ type BackupTableName =
   | 'users'
   | 'domain_settings'
   | 'user_revisions'
+  | 'webauthn_credentials'
   | 'folders'
   | 'ciphers'
   | 'attachments';
@@ -33,6 +34,7 @@ const BACKUP_TABLES: BackupTableName[] = [
   'users',
   'domain_settings',
   'user_revisions',
+  'webauthn_credentials',
   'folders',
   'ciphers',
   'attachments',
@@ -49,6 +51,7 @@ export interface BackupImportResultBody {
     users: number;
     domainSettings: number;
     userRevisions: number;
+    webauthnCredentials: number;
     folders: number;
     ciphers: number;
     attachments: number;
@@ -168,6 +171,7 @@ function buildResetImportTargetStatements(db: D1Database): D1PreparedStatement[]
     'DELETE FROM attachments',
     'DELETE FROM ciphers',
     'DELETE FROM folders',
+    'DELETE FROM webauthn_credentials',
     'DELETE FROM domain_settings',
     'DELETE FROM user_revisions',
     'DELETE FROM users',
@@ -292,6 +296,7 @@ async function importPreparedBackupRows(db: D1Database, payload: BackupPayload['
     })),
     domain_settings: cloneRows(payload.domain_settings || []),
     user_revisions: cloneRows(payload.user_revisions || []),
+    webauthn_credentials: cloneRows(payload.webauthn_credentials || []),
     folders: cloneRows(payload.folders || []),
     ciphers: cloneRows(payload.ciphers || []).map((row) => ({
       ...row,
@@ -629,6 +634,16 @@ async function importBackupRows(db: D1Database, payload: BackupPayload['db'], us
       true
     )
   );
+  await runInsertBatch(
+    db,
+    tableName('webauthn_credentials'),
+    buildInsertStatements(
+      db,
+      tableName('webauthn_credentials'),
+      ['id', 'user_id', 'name', 'public_key', 'credential_id', 'counter', 'type', 'aa_guid', 'transports', 'encrypted_user_key', 'encrypted_public_key', 'encrypted_private_key', 'supports_prf', 'created_at', 'updated_at'],
+      payload.webauthn_credentials || []
+    )
+  );
   await runInsertBatch(
     db,
     tableName('folders'),
@@ -697,6 +712,7 @@ export async function importBackupArchiveBytes(
       users: (db.users || []).length,
       domain_settings: (db.domain_settings || []).length,
       user_revisions: (db.user_revisions || []).length,
+      webauthn_credentials: (db.webauthn_credentials || []).length,
       folders: (db.folders || []).length,
       ciphers: (db.ciphers || []).length,
       attachments: (db.attachments || []).length,
@@ -719,6 +735,7 @@ export async function importBackupArchiveBytes(
       users: (db.users || []).length,
       domain_settings: (db.domain_settings || []).length,
       user_revisions: (db.user_revisions || []).length,
+      webauthn_credentials: (db.webauthn_credentials || []).length,
       folders: (db.folders || []).length,
       ciphers: (db.ciphers || []).length,
       attachments: restored.restoredAttachments.length,
@@ -759,6 +776,7 @@ export async function importBackupArchiveBytes(
           users: (db.users || []).length,
           domainSettings: (db.domain_settings || []).length,
           userRevisions: (db.user_revisions || []).length,
+          webauthnCredentials: (db.webauthn_credentials || []).length,
           folders: (db.folders || []).length,
           ciphers: (db.ciphers || []).length,
           attachments: restored.restoredAttachments.length,
@@ -835,6 +853,7 @@ export async function importRemoteBackupArchiveBytes(
       users: (db.users || []).length,
       domain_settings: (db.domain_settings || []).length,
       user_revisions: (db.user_revisions || []).length,
+      webauthn_credentials: (db.webauthn_credentials || []).length,
       folders: (db.folders || []).length,
       ciphers: (db.ciphers || []).length,
       attachments: (db.attachments || []).length,
@@ -857,6 +876,7 @@ export async function importRemoteBackupArchiveBytes(
       users: (db.users || []).length,
       domain_settings: (db.domain_settings || []).length,
       user_revisions: (db.user_revisions || []).length,
+      webauthn_credentials: (db.webauthn_credentials || []).length,
       folders: (db.folders || []).length,
       ciphers: (db.ciphers || []).length,
       attachments: restored.restoredAttachments.length,
@@ -903,6 +923,7 @@ export async function importRemoteBackupArchiveBytes(
           users: (db.users || []).length,
           domainSettings: (db.domain_settings || []).length,
           userRevisions: (db.user_revisions || []).length,
+          webauthnCredentials: (db.webauthn_credentials || []).length,
           folders: (db.folders || []).length,
           ciphers: (db.ciphers || []).length,
           attachments: restored.restoredAttachments.length,

src/services/storage-account-passkey-repo.ts

@@ -0,0 +1,331 @@
+import type { AccountPasskeyChallenge, AccountPasskeyChallengeScope, AccountPasskeyCredential } from '../types';
+
+type SafeBindFn = (stmt: D1PreparedStatement, ...values: any[]) => D1PreparedStatement;
+
+let accountPasskeySchemaReady = false;
+
+const ACCOUNT_PASSKEY_CREDENTIAL_COLUMN_DEFS = [
+  { name: 'id', sql: 'id TEXT' },
+  { name: 'user_id', sql: "user_id TEXT NOT NULL DEFAULT ''" },
+  { name: 'name', sql: "name TEXT NOT NULL DEFAULT 'Account passkey'" },
+  { name: 'public_key', sql: "public_key TEXT NOT NULL DEFAULT ''" },
+  { name: 'credential_id', sql: "credential_id TEXT NOT NULL DEFAULT ''" },
+  { name: 'counter', sql: 'counter INTEGER NOT NULL DEFAULT 0' },
+  { name: 'type', sql: 'type TEXT' },
+  { name: 'aa_guid', sql: 'aa_guid TEXT' },
+  { name: 'transports', sql: 'transports TEXT' },
+  { name: 'encrypted_user_key', sql: 'encrypted_user_key TEXT' },
+  { name: 'encrypted_public_key', sql: 'encrypted_public_key TEXT' },
+  { name: 'encrypted_private_key', sql: 'encrypted_private_key TEXT' },
+  { name: 'supports_prf', sql: 'supports_prf INTEGER NOT NULL DEFAULT 0' },
+  { name: 'created_at', sql: "created_at TEXT NOT NULL DEFAULT ''" },
+  { name: 'updated_at', sql: "updated_at TEXT NOT NULL DEFAULT ''" },
+] as const;
+
+const ACCOUNT_PASSKEY_CHALLENGE_COLUMNS = [
+  'challenge_hash',
+  'scope',
+  'user_id',
+  'expires_at',
+  'used_at',
+  'created_at',
+] as const;
+
+async function tableColumns(db: D1Database, tableName: 'webauthn_credentials' | 'webauthn_challenges'): Promise<Set<string>> {
+  const result = await db.prepare(`PRAGMA table_info(${tableName})`).all<{ name: string }>();
+  return new Set((result.results || []).map((row) => String(row.name || '').trim()).filter(Boolean));
+}
+
+async function ensureAccountPasskeySchema(db: D1Database): Promise<void> {
+  if (accountPasskeySchemaReady) return;
+
+  await db
+    .prepare(
+      'CREATE TABLE IF NOT EXISTS webauthn_credentials (' +
+        'id TEXT PRIMARY KEY, user_id TEXT NOT NULL, name TEXT NOT NULL, public_key TEXT NOT NULL, credential_id TEXT NOT NULL, counter INTEGER NOT NULL DEFAULT 0, ' +
+        'type TEXT, aa_guid TEXT, transports TEXT, encrypted_user_key TEXT, encrypted_public_key TEXT, encrypted_private_key TEXT, supports_prf INTEGER NOT NULL DEFAULT 0, ' +
+        'created_at TEXT NOT NULL, updated_at TEXT NOT NULL, ' +
+        'FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE)'
+    )
+    .run();
+  let credentialColumns = await tableColumns(db, 'webauthn_credentials');
+  for (const column of ACCOUNT_PASSKEY_CREDENTIAL_COLUMN_DEFS) {
+    if (!credentialColumns.has(column.name)) {
+      await db.prepare(`ALTER TABLE webauthn_credentials ADD COLUMN ${column.sql}`).run();
+    }
+  }
+  credentialColumns = await tableColumns(db, 'webauthn_credentials');
+  if (!credentialColumns.has('credential_id')) {
+    throw new Error('webauthn_credentials schema is missing credential_id');
+  }
+  await db.prepare('CREATE UNIQUE INDEX IF NOT EXISTS idx_webauthn_credentials_id ON webauthn_credentials(id)').run();
+  await db.prepare('CREATE UNIQUE INDEX IF NOT EXISTS idx_webauthn_credentials_credential_id ON webauthn_credentials(credential_id)').run();
+  await db.prepare('CREATE INDEX IF NOT EXISTS idx_webauthn_credentials_user ON webauthn_credentials(user_id)').run();
+  await db.prepare('CREATE INDEX IF NOT EXISTS idx_webauthn_credentials_user_updated ON webauthn_credentials(user_id, updated_at)').run();
+
+  await db
+    .prepare(
+      'CREATE TABLE IF NOT EXISTS webauthn_challenges (' +
+        'challenge_hash TEXT PRIMARY KEY, scope TEXT NOT NULL, user_id TEXT, expires_at INTEGER NOT NULL, used_at INTEGER, created_at INTEGER NOT NULL)'
+    )
+    .run();
+  const challengeColumns = await tableColumns(db, 'webauthn_challenges');
+  const challengeSchemaComplete = ACCOUNT_PASSKEY_CHALLENGE_COLUMNS.every((column) => challengeColumns.has(column));
+  if (!challengeSchemaComplete) {
+    await db.prepare('DROP TABLE IF EXISTS webauthn_challenges').run();
+    await db
+      .prepare(
+        'CREATE TABLE webauthn_challenges (' +
+          'challenge_hash TEXT PRIMARY KEY, scope TEXT NOT NULL, user_id TEXT, expires_at INTEGER NOT NULL, used_at INTEGER, created_at INTEGER NOT NULL)'
+      )
+      .run();
+  }
+  await db.prepare('CREATE INDEX IF NOT EXISTS idx_webauthn_challenges_expires ON webauthn_challenges(expires_at)').run();
+  await db.prepare('CREATE INDEX IF NOT EXISTS idx_webauthn_challenges_user_scope ON webauthn_challenges(user_id, scope)').run();
+
+  accountPasskeySchemaReady = true;
+}
+
+function parseTransports(value: string | null): string[] | null {
+  if (!value) return null;
+  try {
+    const parsed = JSON.parse(value);
+    if (!Array.isArray(parsed)) return null;
+    return parsed.map((item) => String(item || '').trim()).filter(Boolean);
+  } catch {
+    return null;
+  }
+}
+
+function mapCredentialRow(row: {
+  id: string;
+  user_id: string;
+  name: string;
+  public_key: string;
+  credential_id: string;
+  counter: number;
+  type: string | null;
+  aa_guid: string | null;
+  transports: string | null;
+  encrypted_user_key: string | null;
+  encrypted_public_key: string | null;
+  encrypted_private_key: string | null;
+  supports_prf: number;
+  created_at: string;
+  updated_at: string;
+}): AccountPasskeyCredential {
+  return {
+    id: row.id,
+    userId: row.user_id,
+    name: row.name,
+    publicKey: row.public_key,
+    credentialId: row.credential_id,
+    counter: Number(row.counter || 0),
+    type: row.type ?? null,
+    aaGuid: row.aa_guid ?? null,
+    transports: parseTransports(row.transports),
+    encryptedUserKey: row.encrypted_user_key ?? null,
+    encryptedPublicKey: row.encrypted_public_key ?? null,
+    encryptedPrivateKey: row.encrypted_private_key ?? null,
+    supportsPrf: !!row.supports_prf,
+    createdAt: row.created_at,
+    updatedAt: row.updated_at,
+  };
+}
+
+function mapChallengeRow(row: {
+  challenge_hash: string;
+  scope: AccountPasskeyChallengeScope;
+  user_id: string | null;
+  expires_at: number;
+  used_at: number | null;
+  created_at: number;
+}): AccountPasskeyChallenge {
+  return {
+    challengeHash: row.challenge_hash,
+    scope: row.scope,
+    userId: row.user_id ?? null,
+    expiresAt: Number(row.expires_at || 0),
+    usedAt: row.used_at == null ? null : Number(row.used_at),
+    createdAt: Number(row.created_at || 0),
+  };
+}
+
+export async function saveAccountPasskeyCredential(
+  db: D1Database,
+  safeBind: SafeBindFn,
+  credential: AccountPasskeyCredential
+): Promise<void> {
+  await ensureAccountPasskeySchema(db);
+  await safeBind(
+    db.prepare(
+      'INSERT INTO webauthn_credentials(' +
+        'id, user_id, name, public_key, credential_id, counter, type, aa_guid, transports, ' +
+        'encrypted_user_key, encrypted_public_key, encrypted_private_key, supports_prf, created_at, updated_at' +
+        ') VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?) ' +
+        'ON CONFLICT(id) DO UPDATE SET ' +
+        'name=excluded.name, public_key=excluded.public_key, credential_id=excluded.credential_id, counter=excluded.counter, ' +
+        'type=excluded.type, aa_guid=excluded.aa_guid, transports=excluded.transports, encrypted_user_key=excluded.encrypted_user_key, ' +
+        'encrypted_public_key=excluded.encrypted_public_key, encrypted_private_key=excluded.encrypted_private_key, supports_prf=excluded.supports_prf, updated_at=excluded.updated_at'
+    ),
+    credential.id,
+    credential.userId,
+    credential.name,
+    credential.publicKey,
+    credential.credentialId,
+    credential.counter,
+    credential.type,
+    credential.aaGuid,
+    credential.transports ? JSON.stringify(credential.transports) : null,
+    credential.encryptedUserKey,
+    credential.encryptedPublicKey,
+    credential.encryptedPrivateKey,
+    credential.supportsPrf ? 1 : 0,
+    credential.createdAt,
+    credential.updatedAt
+  ).run();
+}
+
+export async function listAccountPasskeyCredentialsByUserId(
+  db: D1Database,
+  userId: string
+): Promise<AccountPasskeyCredential[]> {
+  await ensureAccountPasskeySchema(db);
+  const rows = await db
+    .prepare('SELECT * FROM webauthn_credentials WHERE user_id = ? ORDER BY created_at ASC')
+    .bind(userId)
+    .all<any>();
+  return (rows.results || []).map(mapCredentialRow);
+}
+
+export async function getAccountPasskeyCredentialById(
+  db: D1Database,
+  userId: string,
+  id: string
+): Promise<AccountPasskeyCredential | null> {
+  await ensureAccountPasskeySchema(db);
+  const row = await db
+    .prepare('SELECT * FROM webauthn_credentials WHERE user_id = ? AND id = ? LIMIT 1')
+    .bind(userId, id)
+    .first<any>();
+  return row ? mapCredentialRow(row) : null;
+}
+
+export async function getAccountPasskeyCredentialByCredentialId(
+  db: D1Database,
+  credentialId: string
+): Promise<AccountPasskeyCredential | null> {
+  await ensureAccountPasskeySchema(db);
+  const row = await db
+    .prepare('SELECT * FROM webauthn_credentials WHERE credential_id = ? LIMIT 1')
+    .bind(credentialId)
+    .first<any>();
+  return row ? mapCredentialRow(row) : null;
+}
+
+export async function countAccountPasskeyCredentialsByUserId(
+  db: D1Database,
+  userId: string
+): Promise<number> {
+  await ensureAccountPasskeySchema(db);
+  const row = await db
+    .prepare('SELECT COUNT(*) AS count FROM webauthn_credentials WHERE user_id = ?')
+    .bind(userId)
+    .first<{ count: number }>();
+  return Number(row?.count || 0);
+}
+
+export async function updateAccountPasskeyCounter(
+  db: D1Database,
+  userId: string,
+  credentialId: string,
+  counter: number,
+  updatedAt: string
+): Promise<void> {
+  await ensureAccountPasskeySchema(db);
+  await db
+    .prepare('UPDATE webauthn_credentials SET counter = ?, updated_at = ? WHERE user_id = ? AND credential_id = ?')
+    .bind(counter, updatedAt, userId, credentialId)
+    .run();
+}
+
+export async function updateAccountPasskeyEncryption(
+  db: D1Database,
+  userId: string,
+  credentialId: string,
+  encryptedUserKey: string,
+  encryptedPublicKey: string,
+  encryptedPrivateKey: string,
+  updatedAt: string
+): Promise<boolean> {
+  await ensureAccountPasskeySchema(db);
+  const result = await db
+    .prepare(
+      'UPDATE webauthn_credentials SET encrypted_user_key = ?, encrypted_public_key = ?, encrypted_private_key = ?, supports_prf = 1, updated_at = ? ' +
+        'WHERE user_id = ? AND credential_id = ?'
+    )
+    .bind(encryptedUserKey, encryptedPublicKey, encryptedPrivateKey, updatedAt, userId, credentialId)
+    .run();
+  return Number(result.meta.changes || 0) > 0;
+}
+
+export async function deleteAccountPasskeyCredential(
+  db: D1Database,
+  userId: string,
+  id: string
+): Promise<boolean> {
+  await ensureAccountPasskeySchema(db);
+  const result = await db
+    .prepare('DELETE FROM webauthn_credentials WHERE user_id = ? AND id = ?')
+    .bind(userId, id)
+    .run();
+  return Number(result.meta.changes || 0) > 0;
+}
+
+export async function saveAccountPasskeyChallenge(
+  db: D1Database,
+  challenge: AccountPasskeyChallenge
+): Promise<void> {
+  await ensureAccountPasskeySchema(db);
+  await db.prepare('DELETE FROM webauthn_challenges WHERE expires_at < ? OR used_at IS NOT NULL').bind(Date.now()).run();
+  await db
+    .prepare(
+      'INSERT INTO webauthn_challenges(challenge_hash, scope, user_id, expires_at, used_at, created_at) VALUES(?, ?, ?, ?, ?, ?) ' +
+        'ON CONFLICT(challenge_hash) DO UPDATE SET scope=excluded.scope, user_id=excluded.user_id, expires_at=excluded.expires_at, used_at=excluded.used_at, created_at=excluded.created_at'
+    )
+    .bind(
+      challenge.challengeHash,
+      challenge.scope,
+      challenge.userId,
+      challenge.expiresAt,
+      challenge.usedAt,
+      challenge.createdAt
+    )
+    .run();
+}
+
+export async function consumeAccountPasskeyChallenge(
+  db: D1Database,
+  challengeHash: string,
+  scope: AccountPasskeyChallengeScope,
+  userId: string | null,
+  nowMs: number
+): Promise<AccountPasskeyChallenge | null> {
+  await ensureAccountPasskeySchema(db);
+  const row = await db
+    .prepare('SELECT * FROM webauthn_challenges WHERE challenge_hash = ? AND scope = ? LIMIT 1')
+    .bind(challengeHash, scope)
+    .first<any>();
+  if (!row) return null;
+  const challenge = mapChallengeRow(row);
+  if (challenge.usedAt != null || challenge.expiresAt < nowMs) return null;
+  if (userId !== null && challenge.userId !== userId) return null;
+  if (userId === null && challenge.userId !== null) return null;
+
+  const result = await db
+    .prepare('UPDATE webauthn_challenges SET used_at = ? WHERE challenge_hash = ? AND used_at IS NULL')
+    .bind(nowMs, challengeHash)
+    .run();
+  if (Number(result.meta.changes || 0) <= 0) return null;
+  return { ...challenge, usedAt: nowMs };
+}

src/services/storage-schema.ts

@@ -114,6 +114,20 @@ const SCHEMA_STATEMENTS: readonly string[] = [
   'FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE)',
   'CREATE INDEX IF NOT EXISTS idx_trusted_two_factor_device_tokens_user_device ON trusted_two_factor_device_tokens(user_id, device_identifier)',
 
+  'CREATE TABLE IF NOT EXISTS webauthn_credentials (' +
+  'id TEXT PRIMARY KEY, user_id TEXT NOT NULL, name TEXT NOT NULL, public_key TEXT NOT NULL, credential_id TEXT NOT NULL, counter INTEGER NOT NULL DEFAULT 0, ' +
+  'type TEXT, aa_guid TEXT, transports TEXT, encrypted_user_key TEXT, encrypted_public_key TEXT, encrypted_private_key TEXT, supports_prf INTEGER NOT NULL DEFAULT 0, ' +
+  'created_at TEXT NOT NULL, updated_at TEXT NOT NULL, ' +
+  'FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE)',
+  'CREATE UNIQUE INDEX IF NOT EXISTS idx_webauthn_credentials_credential_id ON webauthn_credentials(credential_id)',
+  'CREATE INDEX IF NOT EXISTS idx_webauthn_credentials_user ON webauthn_credentials(user_id)',
+  'CREATE INDEX IF NOT EXISTS idx_webauthn_credentials_user_updated ON webauthn_credentials(user_id, updated_at)',
+
+  'CREATE TABLE IF NOT EXISTS webauthn_challenges (' +
+  'challenge_hash TEXT PRIMARY KEY, scope TEXT NOT NULL, user_id TEXT, expires_at INTEGER NOT NULL, used_at INTEGER, created_at INTEGER NOT NULL)',
+  'CREATE INDEX IF NOT EXISTS idx_webauthn_challenges_expires ON webauthn_challenges(expires_at)',
+  'CREATE INDEX IF NOT EXISTS idx_webauthn_challenges_user_scope ON webauthn_challenges(user_id, scope)',
+
   'CREATE TABLE IF NOT EXISTS login_attempts_ip (' +
   'ip TEXT PRIMARY KEY, attempts INTEGER NOT NULL, locked_until INTEGER, updated_at INTEGER NOT NULL)',
 

src/services/storage.ts

@@ -1,4 +1,4 @@
-import { User, Cipher, Folder, Attachment, Device, Invite, AuditLog, Send, TrustedDeviceTokenSummary, RefreshTokenRecord, CustomEquivalentDomain } from '../types';
+import { User, Cipher, Folder, Attachment, Device, Invite, AuditLog, Send, TrustedDeviceTokenSummary, RefreshTokenRecord, CustomEquivalentDomain, AccountPasskeyChallenge, AccountPasskeyChallengeScope, AccountPasskeyCredential } from '../types';
 import { LIMITS } from '../config/limits';
 import { ensureStorageSchema } from './storage-schema';
 import {
@@ -115,6 +115,18 @@ import {
   getUserDomainSettings as getStoredUserDomainSettings,
   saveUserDomainSettings as saveStoredUserDomainSettings,
 } from './storage-domain-rules-repo';
+import {
+  consumeAccountPasskeyChallenge as consumeStoredAccountPasskeyChallenge,
+  countAccountPasskeyCredentialsByUserId as countStoredAccountPasskeyCredentialsByUserId,
+  deleteAccountPasskeyCredential as deleteStoredAccountPasskeyCredential,
+  getAccountPasskeyCredentialByCredentialId as findStoredAccountPasskeyCredentialByCredentialId,
+  getAccountPasskeyCredentialById as findStoredAccountPasskeyCredentialById,
+  listAccountPasskeyCredentialsByUserId as listStoredAccountPasskeyCredentialsByUserId,
+  saveAccountPasskeyChallenge as saveStoredAccountPasskeyChallenge,
+  saveAccountPasskeyCredential as saveStoredAccountPasskeyCredential,
+  updateAccountPasskeyCounter as updateStoredAccountPasskeyCounter,
+  updateAccountPasskeyEncryption as updateStoredAccountPasskeyEncryption,
+} from './storage-account-passkey-repo';
 
 const TWO_FACTOR_REMEMBER_TTL_MS = 30 * 24 * 60 * 60 * 1000;
 const STORAGE_SCHEMA_VERSION_KEY = 'schema.version';
@@ -122,7 +134,8 @@ const STORAGE_SCHEMA_VERSION_KEY = 'schema.version';
 // Bump this whenever src/services/storage-schema.ts or migrations/0001_init.sql
 // changes. Existing D1 installs only rerun ensureStorageSchema() when this value
 // differs from config.schema.version.
-const STORAGE_SCHEMA_VERSION = '2026-05-14-lightweight-audit-logs';
+const STORAGE_SCHEMA_VERSION = '2026-06-09-account-passkeys';
+const REQUIRED_ACCOUNT_PASSKEY_TABLES = ['webauthn_credentials', 'webauthn_challenges'] as const;
 
 // D1-backed storage.
 // Contract:
@@ -153,6 +166,16 @@ export class StorageService {
     return stmt.bind(...values.map(v => v === undefined ? null : v));
   }
 
+  private async hasAccountPasskeyTables(): Promise<boolean> {
+    const placeholders = REQUIRED_ACCOUNT_PASSKEY_TABLES.map(() => '?').join(', ');
+    const result = await this.db
+      .prepare(`SELECT name FROM sqlite_master WHERE type = 'table' AND name IN (${placeholders})`)
+      .bind(...REQUIRED_ACCOUNT_PASSKEY_TABLES)
+      .all<{ name: string }>();
+    const found = new Set((result.results || []).map((row) => row.name));
+    return REQUIRED_ACCOUNT_PASSKEY_TABLES.every((table) => found.has(table));
+  }
+
   private sqlChunkSize(fixedBindCount: number): number {
     return Math.max(
       1,
@@ -196,7 +219,10 @@ export class StorageService {
 
     await this.db.prepare('CREATE TABLE IF NOT EXISTS config (key TEXT PRIMARY KEY, value TEXT NOT NULL)').run();
     const schemaVersion = await getStoredConfigValue(this.db, STORAGE_SCHEMA_VERSION_KEY);
-    if (schemaVersion !== STORAGE_SCHEMA_VERSION) {
+    const schemaMissingRequiredTables = schemaVersion === STORAGE_SCHEMA_VERSION
+      ? !(await this.hasAccountPasskeyTables())
+      : true;
+    if (schemaVersion !== STORAGE_SCHEMA_VERSION || schemaMissingRequiredTables) {
       await ensureStorageSchema(this.db);
       await saveConfigValue(this.db, STORAGE_SCHEMA_VERSION_KEY, STORAGE_SCHEMA_VERSION);
     }
@@ -323,6 +349,73 @@ export class StorageService {
     await this.updateRevisionDate(userId);
   }
 
+  // --- Account passkeys / WebAuthn login credentials ---
+
+  async saveAccountPasskeyCredential(credential: AccountPasskeyCredential): Promise<void> {
+    await saveStoredAccountPasskeyCredential(this.db, this.safeBind.bind(this), credential);
+  }
+
+  async getAccountPasskeyCredentialsByUserId(userId: string): Promise<AccountPasskeyCredential[]> {
+    return listStoredAccountPasskeyCredentialsByUserId(this.db, userId);
+  }
+
+  async getAccountPasskeyCredentialById(userId: string, id: string): Promise<AccountPasskeyCredential | null> {
+    return findStoredAccountPasskeyCredentialById(this.db, userId, id);
+  }
+
+  async getAccountPasskeyCredentialByCredentialId(credentialId: string): Promise<AccountPasskeyCredential | null> {
+    return findStoredAccountPasskeyCredentialByCredentialId(this.db, credentialId);
+  }
+
+  async countAccountPasskeyCredentialsByUserId(userId: string): Promise<number> {
+    return countStoredAccountPasskeyCredentialsByUserId(this.db, userId);
+  }
+
+  async updateAccountPasskeyCounter(
+    userId: string,
+    credentialId: string,
+    counter: number,
+    updatedAt: string = new Date().toISOString()
+  ): Promise<void> {
+    await updateStoredAccountPasskeyCounter(this.db, userId, credentialId, counter, updatedAt);
+  }
+
+  async updateAccountPasskeyEncryption(
+    userId: string,
+    credentialId: string,
+    encryptedUserKey: string,
+    encryptedPublicKey: string,
+    encryptedPrivateKey: string,
+    updatedAt: string = new Date().toISOString()
+  ): Promise<boolean> {
+    return updateStoredAccountPasskeyEncryption(
+      this.db,
+      userId,
+      credentialId,
+      encryptedUserKey,
+      encryptedPublicKey,
+      encryptedPrivateKey,
+      updatedAt
+    );
+  }
+
+  async deleteAccountPasskeyCredential(userId: string, id: string): Promise<boolean> {
+    return deleteStoredAccountPasskeyCredential(this.db, userId, id);
+  }
+
+  async saveAccountPasskeyChallenge(challenge: AccountPasskeyChallenge): Promise<void> {
+    await saveStoredAccountPasskeyChallenge(this.db, challenge);
+  }
+
+  async consumeAccountPasskeyChallenge(
+    challengeHash: string,
+    scope: AccountPasskeyChallengeScope,
+    userId: string | null,
+    nowMs: number = Date.now()
+  ): Promise<AccountPasskeyChallenge | null> {
+    return consumeStoredAccountPasskeyChallenge(this.db, challengeHash, scope, userId, nowMs);
+  }
+
   // --- Ciphers ---
 
   async getCipher(id: string): Promise<Cipher | null> {

src/types/index.ts

@@ -11,6 +11,9 @@ export interface Env {
   // Optional fallback for attachment/send file storage (no credit card required).
   ATTACHMENTS_KV?: KVNamespace;
   JWT_SECRET: string;
+  WEBAUTHN_RP_ID?: string;
+  WEBAUTHN_RP_NAME?: string;
+  WEBAUTHN_ALLOWED_ORIGINS?: string;
 }
 
 export type UserRole = 'admin' | 'user';
@@ -234,6 +237,37 @@ export interface Device {
   updatedAt: string;
 }
 
+export type AccountPasskeyPrfStatus = 0 | 1 | 2;
+
+export interface AccountPasskeyCredential {
+  id: string;
+  userId: string;
+  name: string;
+  publicKey: string;
+  credentialId: string;
+  counter: number;
+  type: string | null;
+  aaGuid: string | null;
+  transports: string[] | null;
+  encryptedUserKey: string | null;
+  encryptedPublicKey: string | null;
+  encryptedPrivateKey: string | null;
+  supportsPrf: boolean;
+  createdAt: string;
+  updatedAt: string;
+}
+
+export type AccountPasskeyChallengeScope = 'Authentication' | 'CreateCredential' | 'UpdateKeySet';
+
+export interface AccountPasskeyChallenge {
+  challengeHash: string;
+  scope: AccountPasskeyChallengeScope;
+  userId: string | null;
+  expiresAt: number;
+  usedAt: number | null;
+  createdAt: number;
+}
+
 export interface DevicePendingAuthRequest {
   id: string;
   creationDate: string;
@@ -372,6 +406,14 @@ export interface MasterPasswordUnlock {
   Object: string;
 }
 
+export interface WebAuthnPrfDecryptionOption {
+  EncryptedPrivateKey: string;
+  EncryptedUserKey: string;
+  CredentialId: string;
+  Transports: string[];
+  Object?: string;
+}
+
 export interface UserDecryptionOptions {
   HasMasterPassword: boolean;
   Object: string;
@@ -379,6 +421,7 @@ export interface UserDecryptionOptions {
   MasterPasswordUnlock: MasterPasswordUnlock;
   TrustedDeviceOption: null;
   KeyConnectorOption: null;
+  WebAuthnPrfOption?: WebAuthnPrfDecryptionOption | null;
 }
 
 // API Response types
@@ -498,7 +541,8 @@ export interface SyncResponse {
     MasterPasswordUnlock: MasterPasswordUnlock | null;
     TrustedDeviceOption?: null;
     KeyConnectorOption?: null;
-    WebAuthnPrfOption?: null;
+    WebAuthnPrfOption?: WebAuthnPrfDecryptionOption | null;
+    WebAuthnPrfOptions?: WebAuthnPrfDecryptionOption[];
     Object?: string;
   } | null;
   // PascalCase for desktop/browser clients

src/utils/account-passkeys.ts

@@ -0,0 +1,269 @@
+import type {
+  AuthenticationResponseJSON,
+  AuthenticatorTransportFuture,
+  RegistrationResponseJSON,
+  WebAuthnCredential,
+} from '@simplewebauthn/server';
+import type {
+  AccountPasskeyChallengeScope,
+  AccountPasskeyCredential,
+  AccountPasskeyPrfStatus,
+  Env,
+  WebAuthnPrfDecryptionOption,
+} from '../types';
+import { base64UrlToBytes, bytesToBase64Url } from './passkey';
+
+const ACCOUNT_PASSKEY_TOKEN_TYPE = 'nodewarden.account-passkey.challenge.v1';
+const ACCOUNT_PASSKEY_TOKEN_TTL_MS = 17 * 60 * 1000;
+const ACCOUNT_PASSKEY_CREATE_TOKEN_TTL_MS = 7 * 60 * 1000;
+const DEFAULT_RP_NAME = 'NodeWarden';
+
+interface AccountPasskeyTokenPayload {
+  typ: typeof ACCOUNT_PASSKEY_TOKEN_TYPE;
+  scope: AccountPasskeyChallengeScope;
+  challenge: string;
+  userId: string | null;
+  rpId: string;
+  iat: number;
+  exp: number;
+}
+
+function textBytes(value: string): Uint8Array {
+  return new TextEncoder().encode(value);
+}
+
+async function importHmacKey(secret: string): Promise<CryptoKey> {
+  return crypto.subtle.importKey('raw', textBytes(secret), { name: 'HMAC', hash: 'SHA-256' }, false, ['sign', 'verify']);
+}
+
+async function hmacSha256(secret: string, data: string): Promise<Uint8Array> {
+  const key = await importHmacKey(secret);
+  return new Uint8Array(await crypto.subtle.sign('HMAC', key, textBytes(data)));
+}
+
+function encodeJson(value: unknown): string {
+  return bytesToBase64Url(textBytes(JSON.stringify(value)));
+}
+
+function decodeJson<T>(value: string): T | null {
+  try {
+    return JSON.parse(new TextDecoder().decode(base64UrlToBytes(value))) as T;
+  } catch {
+    return null;
+  }
+}
+
+export async function sha256Base64Url(value: string): Promise<string> {
+  const digest = await crypto.subtle.digest('SHA-256', textBytes(value));
+  return bytesToBase64Url(new Uint8Array(digest));
+}
+
+export function accountPasskeyTokenTtlMs(scope: AccountPasskeyChallengeScope): number {
+  return scope === 'CreateCredential' ? ACCOUNT_PASSKEY_CREATE_TOKEN_TTL_MS : ACCOUNT_PASSKEY_TOKEN_TTL_MS;
+}
+
+export async function createAccountPasskeyToken(
+  env: Env,
+  input: {
+    scope: AccountPasskeyChallengeScope;
+    challenge: string;
+    userId?: string | null;
+    rpId: string;
+    ttlMs?: number;
+  }
+): Promise<string> {
+  const now = Date.now();
+  const payload: AccountPasskeyTokenPayload = {
+    typ: ACCOUNT_PASSKEY_TOKEN_TYPE,
+    scope: input.scope,
+    challenge: input.challenge,
+    userId: input.userId ?? null,
+    rpId: input.rpId,
+    iat: now,
+    exp: now + (input.ttlMs ?? accountPasskeyTokenTtlMs(input.scope)),
+  };
+  const header = { alg: 'HS256', typ: 'JWT' };
+  const data = `${encodeJson(header)}.${encodeJson(payload)}`;
+  const signature = bytesToBase64Url(await hmacSha256(env.JWT_SECRET, data));
+  return `${data}.${signature}`;
+}
+
+export async function verifyAccountPasskeyToken(
+  env: Env,
+  token: string,
+  scope: AccountPasskeyChallengeScope
+): Promise<AccountPasskeyTokenPayload | null> {
+  try {
+    const parts = String(token || '').split('.');
+    if (parts.length !== 3) return null;
+    const data = `${parts[0]}.${parts[1]}`;
+    const expected = await hmacSha256(env.JWT_SECRET, data);
+    const actual = base64UrlToBytes(parts[2]);
+    if (actual.length !== expected.length) return null;
+    let diff = 0;
+    for (let i = 0; i < actual.length; i += 1) diff |= actual[i] ^ expected[i];
+    if (diff !== 0) return null;
+
+    const payload = decodeJson<AccountPasskeyTokenPayload>(parts[1]);
+    if (!payload || payload.typ !== ACCOUNT_PASSKEY_TOKEN_TYPE || payload.scope !== scope) return null;
+    if (!payload.challenge || !payload.rpId || !Number.isFinite(payload.exp)) return null;
+    if (payload.exp < Date.now()) return null;
+    return payload;
+  } catch {
+    return null;
+  }
+}
+
+export function getAccountPasskeyRpConfig(request: Request, env: Env): { rpId: string; rpName: string; origins: string[] } {
+  const url = new URL(request.url);
+  const configuredRpId = String(env.WEBAUTHN_RP_ID || '').trim();
+  const rpId = configuredRpId || url.hostname;
+  const rpName = String(env.WEBAUTHN_RP_NAME || '').trim() || DEFAULT_RP_NAME;
+  const configuredOrigins = String(env.WEBAUTHN_ALLOWED_ORIGINS || '')
+    .split(',')
+    .map((origin) => origin.trim())
+    .filter(Boolean);
+  const origins = new Set<string>([url.origin, ...configuredOrigins]);
+  const requestOrigin = request.headers.get('Origin');
+  if (
+    requestOrigin
+    && (
+      requestOrigin.startsWith('chrome-extension://')
+      || requestOrigin.startsWith('moz-extension://')
+      || requestOrigin.startsWith('safari-web-extension://')
+    )
+  ) {
+    origins.add(requestOrigin);
+  }
+  return { rpId, rpName, origins: Array.from(origins) };
+}
+
+export function userIdToWebAuthnUserId(userId: string): Uint8Array {
+  return textBytes(userId);
+}
+
+export function userHandleToUserId(userHandle: string | undefined): string | null {
+  if (!userHandle) return null;
+  try {
+    const decoded = new TextDecoder().decode(base64UrlToBytes(userHandle));
+    return decoded.trim() || null;
+  } catch {
+    return null;
+  }
+}
+
+export function accountPasskeyPrfStatus(credential: Pick<AccountPasskeyCredential, 'supportsPrf' | 'encryptedUserKey' | 'encryptedPublicKey' | 'encryptedPrivateKey'>): AccountPasskeyPrfStatus {
+  if (!credential.supportsPrf) return 2;
+  if (credential.encryptedUserKey && credential.encryptedPublicKey && credential.encryptedPrivateKey) return 0;
+  return 1;
+}
+
+export function buildWebAuthnPrfOption(
+  credential: AccountPasskeyCredential
+): WebAuthnPrfDecryptionOption | null {
+  if (accountPasskeyPrfStatus(credential) !== 0) return null;
+  return {
+    EncryptedPrivateKey: credential.encryptedPrivateKey!,
+    EncryptedUserKey: credential.encryptedUserKey!,
+    CredentialId: credential.credentialId,
+    Transports: credential.transports || [],
+    Object: 'webAuthnPrfDecryptionOption',
+  };
+}
+
+export function accountPasskeyCredentialToResponse(credential: AccountPasskeyCredential): Record<string, unknown> {
+  const prfStatus = accountPasskeyPrfStatus(credential);
+  return {
+    Id: credential.id,
+    id: credential.id,
+    Name: credential.name,
+    name: credential.name,
+    PrfStatus: prfStatus,
+    prfStatus,
+    EncryptedPublicKey: credential.encryptedPublicKey,
+    encryptedPublicKey: credential.encryptedPublicKey,
+    EncryptedUserKey: credential.encryptedUserKey,
+    encryptedUserKey: credential.encryptedUserKey,
+    CreationDate: credential.createdAt,
+    RevisionDate: credential.updatedAt,
+    Object: 'webauthnCredential',
+    object: 'webauthnCredential',
+  };
+}
+
+export function toSimpleWebAuthnCredential(credential: AccountPasskeyCredential): WebAuthnCredential {
+  return {
+    id: credential.credentialId,
+    publicKey: Uint8Array.from(base64UrlToBytes(credential.publicKey)),
+    counter: credential.counter,
+    transports: (credential.transports || undefined) as AuthenticatorTransportFuture[] | undefined,
+  };
+}
+
+export function normalizeRegistrationResponse(raw: unknown): RegistrationResponseJSON | null {
+  const input = raw && typeof raw === 'object' ? raw as Record<string, any> : null;
+  const response = input?.response && typeof input.response === 'object' ? input.response as Record<string, any> : null;
+  if (!input || !response) return null;
+  const clientDataJSON = response.clientDataJSON || response.clientDataJson;
+  if (!input.id || !input.rawId || !clientDataJSON || !response.attestationObject) return null;
+  return {
+    id: String(input.id),
+    rawId: String(input.rawId),
+    type: 'public-key',
+    authenticatorAttachment: input.authenticatorAttachment,
+    clientExtensionResults: input.clientExtensionResults || input.extensions || {},
+    response: {
+      attestationObject: String(response.attestationObject),
+      clientDataJSON: String(clientDataJSON),
+      authenticatorData: response.authenticatorData ? String(response.authenticatorData) : undefined,
+      transports: Array.isArray(response.transports) ? response.transports.map(String) as AuthenticatorTransportFuture[] : undefined,
+      publicKey: response.publicKey ? String(response.publicKey) : undefined,
+      publicKeyAlgorithm: typeof response.publicKeyAlgorithm === 'number' ? response.publicKeyAlgorithm : undefined,
+    },
+  };
+}
+
+export function normalizeAuthenticationResponse(raw: unknown): AuthenticationResponseJSON | null {
+  const input = raw && typeof raw === 'object' ? raw as Record<string, any> : null;
+  const response = input?.response && typeof input.response === 'object' ? input.response as Record<string, any> : null;
+  if (!input || !response) return null;
+  const clientDataJSON = response.clientDataJSON || response.clientDataJson;
+  if (!input.id || !input.rawId || !clientDataJSON || !response.authenticatorData || !response.signature) return null;
+  return {
+    id: String(input.id),
+    rawId: String(input.rawId),
+    type: 'public-key',
+    authenticatorAttachment: input.authenticatorAttachment,
+    clientExtensionResults: input.clientExtensionResults || input.extensions || {},
+    response: {
+      authenticatorData: String(response.authenticatorData),
+      clientDataJSON: String(clientDataJSON),
+      signature: String(response.signature),
+      userHandle: response.userHandle ? String(response.userHandle) : undefined,
+    },
+  };
+}
+
+export function normalizeAccountPasskeyName(value: unknown): string {
+  const normalized = String(value || '').trim();
+  return (normalized || 'Account passkey').slice(0, 128);
+}
+
+export function normalizeTransports(value: unknown): string[] | null {
+  if (!Array.isArray(value)) return null;
+  const transports = value.map((item) => String(item || '').trim()).filter(Boolean);
+  return transports.length ? transports.slice(0, 12) : null;
+}
+
+export function isSerializedEncString(value: unknown): value is string {
+  const text = String(value || '').trim();
+  if (!text) return false;
+  const parts = text.split('.');
+  if (parts.length !== 2) return false;
+  const type = Number(parts[0]);
+  const bodyParts = parts[1].split('|');
+  if (type === 2) return bodyParts.length === 3 && bodyParts.every(Boolean);
+  if (type === 3 || type === 4) return bodyParts.length === 1 && !!bodyParts[0];
+  if (type === 5 || type === 6) return bodyParts.length === 2 && bodyParts.every(Boolean);
+  return false;
+}

src/utils/user-decryption.ts

@@ -1,4 +1,4 @@
-import { User, UserDecryptionOptions } from '../types';
+import { User, UserDecryptionOptions, WebAuthnPrfDecryptionOption } from '../types';
 
 function normalizeOptionalPublicKey(value: unknown): string {
   if (value == null) return '';
@@ -40,7 +40,8 @@ export function buildMasterPasswordUnlock(
 }
 
 export function buildUserDecryptionOptions(
-  user: Pick<User, 'email' | 'key' | 'kdfType' | 'kdfIterations' | 'kdfMemory' | 'kdfParallelism'>
+  user: Pick<User, 'email' | 'key' | 'kdfType' | 'kdfIterations' | 'kdfMemory' | 'kdfParallelism'>,
+  webAuthnPrfOption: WebAuthnPrfDecryptionOption | null = null
 ): UserDecryptionOptions {
   return {
     HasMasterPassword: true,
@@ -48,6 +49,7 @@ export function buildUserDecryptionOptions(
     MasterPasswordUnlock: buildMasterPasswordUnlock(user),
     TrustedDeviceOption: null,
     KeyConnectorOption: null,
+    WebAuthnPrfOption: webAuthnPrfOption,
   };
 }