Implement token revocation public api

.changeset/eight-planets-sleep.md

@@ -0,0 +1,6 @@
+---
+'@firebase/auth': minor
+'firebase': minor
+---
+
+[feature] Add sign-in with Apple token revocation support.

common/api-review/auth.api.md

@@ -725,6 +725,9 @@ export class RecaptchaVerifier implements ApplicationVerifierInternal {
 // @public
 export function reload(user: User): Promise<void>;
 
+// @public
+export function revokeAccessToken(auth: Auth, token: string): Promise<void>;
+
 // Warning: (ae-forgotten-export) The symbol "FederatedAuthProvider" needs to be exported by the entry point index.d.ts
 //
 // @public

docs-devsite/auth.md

@@ -35,6 +35,7 @@ Firebase Authentication
 |  [isSignInWithEmailLink(auth, emailLink)](./auth.md#issigninwithemaillink) | Checks if an incoming link is a sign-in with email link suitable for [signInWithEmailLink()](./auth.md#signinwithemaillink)<!-- -->. |
 |  [onAuthStateChanged(auth, nextOrObserver, error, completed)](./auth.md#onauthstatechanged) | Adds an observer for changes to the user's sign-in state. |
 |  [onIdTokenChanged(auth, nextOrObserver, error, completed)](./auth.md#onidtokenchanged) | Adds an observer for changes to the signed-in user's ID token. |
+|  [revokeAccessToken(auth, token)](./auth.md#revokeaccesstoken) | Revokes the given access token. Currently only supports Apple OAuth access tokens. |
 |  [sendPasswordResetEmail(auth, email, actionCodeSettings)](./auth.md#sendpasswordresetemail) | Sends a password reset email to the given email address. |
 |  [sendSignInLinkToEmail(auth, email, actionCodeSettings)](./auth.md#sendsigninlinktoemail) | Sends a sign-in email link to the user with the specified email. |
 |  [setPersistence(auth, persistence)](./auth.md#setpersistence) | Changes the type of persistence on the [Auth](./auth.auth.md#auth_interface) instance for the currently saved <code>Auth</code> session and applies this type of persistence for future sign-in requests, including sign-in with redirect requests. |
@@ -598,6 +599,27 @@ export declare function onIdTokenChanged(auth: Auth, nextOrObserver: NextOrObser
 
 [Unsubscribe](./util.md#unsubscribe)
 
+## revokeAccessToken()
+
+Revokes the given access token. Currently only supports Apple OAuth access tokens.
+
+<b>Signature:</b>
+
+```typescript
+export declare function revokeAccessToken(auth: Auth, token: string): Promise<void>;
+```
+
+### Parameters
+
+|  Parameter | Type | Description |
+|  --- | --- | --- |
+|  auth | [Auth](./auth.auth.md#auth_interface) | The [Auth](./auth.auth.md#auth_interface) instance. |
+|  token | string | The Apple OAuth access token. |
+
+<b>Returns:</b>
+
+Promise&lt;void&gt;
+
 ## sendPasswordResetEmail()
 
 Sends a password reset email to the given email address.

packages/auth/demo/src/index.js

@@ -73,7 +73,8 @@ import {
   browserPopupRedirectResolver,
   connectAuthEmulator,
   initializeRecaptchaConfig,
-  validatePassword
+  validatePassword,
+  revokeAccessToken
 } from '@firebase/auth';
 
 import { config } from './config';
@@ -1730,13 +1731,58 @@ function logAdditionalUserInfo(response) {
  * Deletes the user account.
  */
 function onDelete() {
-  activeUser()
-    ['delete']()
-    .then(() => {
-      log('User successfully deleted.');
-      alertSuccess('User successfully deleted.');
-      refreshUserData();
-    }, onAuthError);
+  let isAppleProviderLinked = false;
+
+  for (const provider of activeUser().providerData) {
+    if (provider.providerId == 'apple.com') {
+      isAppleProviderLinked = true;
+      break;
+    }
+  }
+
+  if (isAppleProviderLinked) {
+    revokeAppleTokenAndDeleteUser();
+  } else {
+    activeUser()
+      ['delete']()
+      .then(() => {
+        log('User successfully deleted.');
+        alertSuccess('User successfully deleted.');
+        refreshUserData();
+      }, onAuthError);
+  }
+}
+
+function revokeAppleTokenAndDeleteUser() {
+  // Re-auth then revoke the token
+  const provider = new OAuthProvider('apple.com');
+  provider.addScope('email');
+  provider.addScope('name');
+
+  const auth = getAuth();
+  signInWithPopup(auth, provider).then(result => {
+    // The signed-in user info.
+    const credential = OAuthProvider.credentialFromResult(result);
+    const accessToken = credential.accessToken;
+
+    revokeAccessToken(auth, accessToken)
+      .then(() => {
+        log('Token successfully revoked.');
+
+        // Usual user deletion
+        activeUser()
+          ['delete']()
+          .then(() => {
+            log('User successfully deleted.');
+            alertSuccess('User successfully deleted.');
+            refreshUserData();
+          }, onAuthError);
+      })
+      .catch(error => {
+        log('Failed to revoke token. ', error.message);
+        alertError('Failed to revoke token. ', error.message);
+      });
+  });
 }
 
 /**

packages/auth/src/api/authentication/token.test.ts

@@ -21,11 +21,12 @@ import chaiAsPromised from 'chai-as-promised';
 
 import { FirebaseError, getUA, querystringDecode } from '@firebase/util';
 
-import { HttpHeader } from '../';
+import { Endpoint, HttpHeader } from '../';
+import { mockEndpoint } from '../../../test/helpers/api/helper';
 import { testAuth, TestAuth } from '../../../test/helpers/mock_auth';
 import * as fetch from '../../../test/helpers/mock_fetch';
 import { ServerError } from '../errors';
-import { Endpoint, requestStsToken } from './token';
+import { TokenType, requestStsToken, revokeToken } from './token';
 import { SDK_VERSION } from '@firebase/app';
 import { _getBrowserName } from '../../core/util/browser';
 
@@ -143,3 +144,63 @@ describe('requestStsToken', () => {
     });
   });
 });
+
+describe('api/authentication/revokeToken', () => {
+  const request = {
+    providerId: 'provider-id',
+    tokenType: TokenType.ACCESS_TOKEN,
+    token: 'token',
+    idToken: 'id-token'
+  };
+
+  let auth: TestAuth;
+
+  beforeEach(async () => {
+    auth = await testAuth();
+    fetch.setUp();
+  });
+
+  afterEach(() => {
+    fetch.tearDown();
+  });
+
+  it('should POST to the correct endpoint', async () => {
+    const mock = mockEndpoint(Endpoint.REVOKE_TOKEN, {});
+
+    auth.tenantId = 'tenant-id';
+    await revokeToken(auth, request);
+    // Currently, backend returns an empty response.
+    expect(mock.calls[0].request).to.eql({ ...request, tenantId: 'tenant-id' });
+    expect(mock.calls[0].method).to.eq('POST');
+    expect(mock.calls[0].headers!.get(HttpHeader.CONTENT_TYPE)).to.eq(
+      'application/json'
+    );
+    expect(mock.calls[0].headers!.get(HttpHeader.X_CLIENT_VERSION)).to.eq(
+      'testSDK/0.0.0'
+    );
+  });
+
+  it('should handle errors', async () => {
+    const mock = mockEndpoint(
+      Endpoint.REVOKE_TOKEN,
+      {
+        error: {
+          code: 400,
+          message: ServerError.INVALID_IDP_RESPONSE,
+          errors: [
+            {
+              message: ServerError.INVALID_IDP_RESPONSE
+            }
+          ]
+        }
+      },
+      400
+    );
+
+    await expect(revokeToken(auth, request)).to.be.rejectedWith(
+      FirebaseError,
+      'Firebase: The supplied auth credential is malformed or has expired. (auth/invalid-credential).'
+    );
+    expect(mock.calls[0].request).to.eql(request);
+  });
+});

packages/auth/src/api/authentication/token.ts

@@ -22,15 +22,19 @@ import { querystring } from '@firebase/util';
 import {
   _getFinalTarget,
   _performFetchWithErrorHandling,
+  _performApiRequest,
+  _addTidIfNecessary,
   HttpMethod,
-  HttpHeader
+  HttpHeader,
+  Endpoint
 } from '../index';
 import { FetchProvider } from '../../core/util/fetch_provider';
 import { Auth } from '../../model/public_types';
 import { AuthInternal } from '../../model/auth';
 
-export const enum Endpoint {
-  TOKEN = '/v1/token'
+export const enum TokenType {
+  REFRESH_TOKEN = 'REFRESH_TOKEN',
+  ACCESS_TOKEN = 'ACCESS_TOKEN'
 }
 
 /** The server responses with snake_case; we convert to camelCase */
@@ -46,6 +50,16 @@ export interface RequestStsTokenResponse {
   refreshToken: string;
 }
 
+export interface RevokeTokenRequest {
+  providerId: string;
+  tokenType: TokenType;
+  token: string;
+  idToken: string;
+  tenantId?: string;
+}
+
+export interface RevokeTokenResponse {}
+
 export async function requestStsToken(
   auth: Auth,
   refreshToken: string
@@ -85,3 +99,15 @@ export async function requestStsToken(
     refreshToken: response.refresh_token
   };
 }
+
+export async function revokeToken(
+  auth: Auth,
+  request: RevokeTokenRequest
+): Promise<RevokeTokenResponse> {
+  return _performApiRequest<RevokeTokenRequest, RevokeTokenResponse>(
+    auth,
+    HttpMethod.POST,
+    Endpoint.REVOKE_TOKEN,
+    _addTidIfNecessary(auth, request)
+  );
+}

packages/auth/src/api/index.ts

@@ -68,7 +68,9 @@ export const enum Endpoint {
   WITHDRAW_MFA = '/v2/accounts/mfaEnrollment:withdraw',
   GET_PROJECT_CONFIG = '/v1/projects',
   GET_RECAPTCHA_CONFIG = '/v2/recaptchaConfig',
-  GET_PASSWORD_POLICY = '/v2/passwordPolicy'
+  GET_PASSWORD_POLICY = '/v2/passwordPolicy',
+  TOKEN = '/v1/token',
+  REVOKE_TOKEN = '/v2/accounts:revokeToken'
 }
 
 export const enum RecaptchaClientType {

packages/auth/src/core/auth/auth_impl.ts

@@ -63,6 +63,11 @@ import { _getInstance } from '../util/instantiator';
 import { _getUserLanguage } from '../util/navigator';
 import { _getClientVersion } from '../util/version';
 import { HttpHeader } from '../../api';
+import {
+  RevokeTokenRequest,
+  TokenType,
+  revokeToken
+} from '../../api/authentication/token';
 import { AuthMiddlewareQueue } from './middleware';
 import { RecaptchaConfig } from '../../platform_browser/recaptcha/recaptcha';
 import { _logWarn } from '../util/log';
@@ -514,6 +519,26 @@ export class AuthImpl implements AuthInternal, _FirebaseService {
     });
   }
 
+  /**
+   * Revokes the given access token. Currently only supports Apple OAuth access tokens.
+   */
+  async revokeAccessToken(token: string): Promise<void> {
+    if (this.currentUser) {
+      const idToken = await this.currentUser.getIdToken();
+      // Generalize this to accept other providers once supported.
+      const request: RevokeTokenRequest = {
+        providerId: 'apple.com',
+        tokenType: TokenType.ACCESS_TOKEN,
+        token,
+        idToken
+      };
+      if (this.tenantId != null) {
+        request.tenantId = this.tenantId;
+      }
+      await revokeToken(this, request);
+    }
+  }
+
   toJSON(): object {
     return {
       apiKey: this.config.apiKey,

packages/auth/src/core/index.ts

@@ -245,6 +245,19 @@ export function signOut(auth: Auth): Promise<void> {
   return getModularInstance(auth).signOut();
 }
 
+/**
+ * Revokes the given access token. Currently only supports Apple OAuth access tokens.
+ *
+ * @param auth - The {@link Auth} instance.
+ * @param token - The Apple OAuth access token.
+ *
+ * @public
+ */
+export function revokeAccessToken(auth: Auth, token: string): Promise<void> {
+  const authInternal = _castAuth(auth);
+  return authInternal.revokeAccessToken(token);
+}
+
 export { initializeAuth } from './auth/initialize';
 export { connectAuthEmulator } from './auth/emulator';
 

packages/auth/src/core/user/token_manager.test.ts

@@ -23,11 +23,11 @@ import { FirebaseError } from '@firebase/util';
 
 import { testAuth, TestAuth } from '../../../test/helpers/mock_auth';
 import * as fetch from '../../../test/helpers/mock_fetch';
-import { Endpoint } from '../../api/authentication/token';
 import { IdTokenResponse } from '../../model/id_token';
 import { StsTokenManager, Buffer } from './token_manager';
 import { FinalizeMfaResponse } from '../../api/authentication/mfa';
 import { makeJWT } from '../../../test/helpers/jwt';
+import { Endpoint } from '../../api';
 
 use(chaiAsPromised);
 

packages/auth/src/model/auth.ts

@@ -105,4 +105,5 @@ export interface AuthInternal extends Auth {
   useDeviceLanguage(): void;
   signOut(): Promise<void>;
   validatePassword(password: string): Promise<PasswordValidationStatus>;
+  revokeAccessToken(token: string): Promise<void>;
 }