Improve OAuth handling

apps/oauth2/appinfo/info.xml

@@ -5,7 +5,7 @@
 	<name>OAuth 2.0</name>
 	<summary>Allows OAuth2 compatible authentication from other web applications.</summary>
 	<description>The OAuth2 app allows administrators to configure the built-in authentication workflow to also allow OAuth2 compatible authentication from other web applications.</description>
-	<version>1.2.0</version>
+	<version>1.2.1</version>
 	<licence>agpl</licence>
 	<author>Lukas Reschke</author>
 	<namespace>OAuth2</namespace>
@@ -20,6 +20,12 @@
 		<nextcloud min-version="14" max-version="14" />
 	</dependencies>
 
+	<repair-steps>
+		<post-migration>
+			<step>OCA\OAuth2\Migration\SetTokenExpiration</step>
+		</post-migration>
+	</repair-steps>
+
 	<settings>
 		<admin>OCA\OAuth2\Settings\Admin</admin>
 	</settings>

apps/oauth2/composer/composer/autoload_classmap.php

@@ -15,5 +15,6 @@
     'OCA\\OAuth2\\Db\\ClientMapper' => $baseDir . '/../lib/Db/ClientMapper.php',
     'OCA\\OAuth2\\Exceptions\\AccessTokenNotFoundException' => $baseDir . '/../lib/Exceptions/AccessTokenNotFoundException.php',
     'OCA\\OAuth2\\Exceptions\\ClientNotFoundException' => $baseDir . '/../lib/Exceptions/ClientNotFoundException.php',
+    'OCA\\OAuth2\\Migration\\SetTokenExpiration' => $baseDir . '/../lib/Migration/SetTokenExpiration.php',
     'OCA\\OAuth2\\Settings\\Admin' => $baseDir . '/../lib/Settings/Admin.php',
 );

apps/oauth2/composer/composer/autoload_static.php

@@ -30,6 +30,7 @@ class ComposerStaticInitOAuth2
         'OCA\\OAuth2\\Db\\ClientMapper' => __DIR__ . '/..' . '/../lib/Db/ClientMapper.php',
         'OCA\\OAuth2\\Exceptions\\AccessTokenNotFoundException' => __DIR__ . '/..' . '/../lib/Exceptions/AccessTokenNotFoundException.php',
         'OCA\\OAuth2\\Exceptions\\ClientNotFoundException' => __DIR__ . '/..' . '/../lib/Exceptions/ClientNotFoundException.php',
+        'OCA\\OAuth2\\Migration\\SetTokenExpiration' => __DIR__ . '/..' . '/../lib/Migration/SetTokenExpiration.php',
         'OCA\\OAuth2\\Settings\\Admin' => __DIR__ . '/..' . '/../lib/Settings/Admin.php',
     );
 

apps/oauth2/lib/Controller/LoginRedirectorController.php

@@ -61,11 +61,20 @@ public function __construct($appName,
 	 *
 	 * @param string $client_id
 	 * @param string $state
+	 * @param string $response_type
 	 * @return RedirectResponse
 	 */
 	public function authorize($client_id,
-							  $state) {
+							  $state,
+							  $response_type) {
 		$client = $this->clientMapper->getByIdentifier($client_id);
+
+		if ($response_type !== 'code') {
+			//Fail
+			$url = $client->getRedirectUri() . '?error=unsupported_response_type&state=' . $state;
+			return new RedirectResponse($url);
+		}
+
 		$this->session->set('oauth.state', $state);
 
 		$targetUrl = $this->urlGenerator->linkToRouteAbsolute(

apps/oauth2/lib/Controller/OauthApiController.php

@@ -21,67 +21,151 @@
 
 namespace OCA\OAuth2\Controller;
 
-use OC\Authentication\Token\DefaultTokenMapper;
+use OC\Authentication\Exceptions\InvalidTokenException;
+use OC\Authentication\Token\ExpiredTokenException;
+use OC\Authentication\Token\IProvider as TokenProvider;
 use OCA\OAuth2\Db\AccessTokenMapper;
+use OCA\OAuth2\Db\ClientMapper;
+use OCA\OAuth2\Exceptions\AccessTokenNotFoundException;
+use OCA\OAuth2\Exceptions\ClientNotFoundException;
 use OCP\AppFramework\Controller;
+use OCP\AppFramework\Http;
 use OCP\AppFramework\Http\JSONResponse;
+use OCP\AppFramework\Utility\ITimeFactory;
 use OCP\IRequest;
 use OCP\Security\ICrypto;
 use OCP\Security\ISecureRandom;
 
 class OauthApiController extends Controller {
 	/** @var AccessTokenMapper */
 	private $accessTokenMapper;
+	/** @var ClientMapper */
+	private $clientMapper;
 	/** @var ICrypto */
 	private $crypto;
-	/** @var DefaultTokenMapper */
-	private $defaultTokenMapper;
+	/** @var TokenProvider */
+	private $tokenProvider;
 	/** @var ISecureRandom */
 	private $secureRandom;
+	/** @var ITimeFactory */
+	private $time;
 
 	/**
 	 * @param string $appName
 	 * @param IRequest $request
 	 * @param ICrypto $crypto
 	 * @param AccessTokenMapper $accessTokenMapper
-	 * @param DefaultTokenMapper $defaultTokenMapper
+	 * @param ClientMapper $clientMapper
+	 * @param TokenProvider $tokenProvider
 	 * @param ISecureRandom $secureRandom
+	 * @param ITimeFactory $time
 	 */
 	public function __construct($appName,
 								IRequest $request,
 								ICrypto $crypto,
 								AccessTokenMapper $accessTokenMapper,
-								DefaultTokenMapper $defaultTokenMapper,
-								ISecureRandom $secureRandom) {
+								ClientMapper $clientMapper,
+								TokenProvider $tokenProvider,
+								ISecureRandom $secureRandom,
+								ITimeFactory $time) {
 		parent::__construct($appName, $request);
 		$this->crypto = $crypto;
 		$this->accessTokenMapper = $accessTokenMapper;
-		$this->defaultTokenMapper = $defaultTokenMapper;
+		$this->clientMapper = $clientMapper;
+		$this->tokenProvider = $tokenProvider;
 		$this->secureRandom = $secureRandom;
+		$this->time = $time;
 	}
 
 	/**
 	 * @PublicPage
 	 * @NoCSRFRequired
 	 *
+	 * @param string $grant_type
 	 * @param string $code
+	 * @param string $refresh_token
+	 * @param string $client_id
+	 * @param string $client_secret
 	 * @return JSONResponse
 	 */
-	public function getToken($code) {
-		$accessToken = $this->accessTokenMapper->getByCode($code);
+	public function getToken($grant_type, $code, $refresh_token, $client_id, $client_secret) {
+
+		// We only handle two types
+		if ($grant_type !== 'authorization_code' && $grant_type !== 'refresh_token') {
+			return new JSONResponse([
+				'error' => 'invalid_grant',
+			], Http::STATUS_BAD_REQUEST);
+		}
+
+		// We handle the initial and refresh tokens the same way
+		if ($grant_type === 'refresh_token' ) {
+			$code = $refresh_token;
+		}
+
+		try {
+			$accessToken = $this->accessTokenMapper->getByCode($code);
+		} catch (AccessTokenNotFoundException $e) {
+			return new JSONResponse([
+				'error' => 'invalid_request',
+			], Http::STATUS_BAD_REQUEST);
+		}
+
+		try {
+			$client = $this->clientMapper->getByUid($accessToken->getClientId());
+		} catch (ClientNotFoundException $e) {
+			return new JSONResponse([
+				'error' => 'invalid_request',
+			], Http::STATUS_BAD_REQUEST);
+		}
+
+		// The client id and secret must match. Else we don't provide an access token!
+		if ($client->getClientIdentifier() !== $client_id || $client->getSecret() !== $client_secret) {
+			return new JSONResponse([
+				'error' => 'invalid_client',
+			], Http::STATUS_BAD_REQUEST);
+		}
+
 		$decryptedToken = $this->crypto->decrypt($accessToken->getEncryptedToken(), $code);
-		$newCode = $this->secureRandom->generate(128);
+
+		// Obtain the appToken assoicated
+		try {
+			$appToken = $this->tokenProvider->getTokenById($accessToken->getTokenId());
+		} catch (ExpiredTokenException $e) {
+			$appToken = $e->getToken();
+		} catch (InvalidTokenException $e) {
+			//We can't do anything...
+			$this->accessTokenMapper->delete($accessToken);
+			return new JSONResponse([
+				'error' => 'invalid_request',
+			], Http::STATUS_BAD_REQUEST);
+		}
+
+		// Rotate the apptoken (so the old one becomes invalid basically)
+		$newToken = $this->secureRandom->generate(72, ISecureRandom::CHAR_UPPER.ISecureRandom::CHAR_LOWER.ISecureRandom::CHAR_DIGITS);
+
+		$appToken = $this->tokenProvider->rotate(
+			$appToken,
+			$decryptedToken,
+			$newToken
+		);
+
+		// Expiration is in 1 hour again
+		$appToken->setExpires($this->time->getTime() + 3600);
+		$this->tokenProvider->updateToken($appToken);
+
+		// Generate a new refresh token and encrypt the new apptoken in the DB
+		$newCode = $this->secureRandom->generate(128, ISecureRandom::CHAR_UPPER.ISecureRandom::CHAR_LOWER.ISecureRandom::CHAR_DIGITS);
 		$accessToken->setHashedCode(hash('sha512', $newCode));
-		$accessToken->setEncryptedToken($this->crypto->encrypt($decryptedToken, $newCode));
+		$accessToken->setEncryptedToken($this->crypto->encrypt($newToken, $newCode));
 		$this->accessTokenMapper->update($accessToken);
 
 		return new JSONResponse(
 			[
-				'access_token' => $decryptedToken,
+				'access_token' => $newToken,
 				'token_type' => 'Bearer',
 				'expires_in' => 3600,
 				'refresh_token' => $newCode,
-				'user_id' => $this->defaultTokenMapper->getTokenById($accessToken->getTokenId())->getUID(),
+				'user_id' => $appToken->getUID(),
 			]
 		);
 	}

apps/oauth2/lib/Migration/SetTokenExpiration.php

@@ -0,0 +1,77 @@
+<?php
+/**
+ * @copyright Copyright 2018, Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @author Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OCA\OAuth2\Migration;
+
+use OC\Authentication\Exceptions\InvalidTokenException;
+use OC\Authentication\Token\IProvider as TokenProvider;
+use OCA\OAuth2\Db\AccessToken;
+use OCP\AppFramework\Utility\ITimeFactory;
+use OCP\IDBConnection;
+use OCP\Migration\IOutput;
+use OCP\Migration\IRepairStep;
+
+class SetTokenExpiration implements IRepairStep {
+
+	/** @var IDBConnection */
+	private $connection;
+
+	/** @var ITimeFactory */
+	private $time;
+
+	/** @var TokenProvider */
+	private $tokenProvider;
+
+	public function __construct(IDBConnection $connection,
+								ITimeFactory $timeFactory,
+								TokenProvider $tokenProvider) {
+		$this->connection = $connection;
+		$this->time = $timeFactory;
+		$this->tokenProvider = $tokenProvider;
+	}
+
+	public function getName() {
+		return 'Update OAuth token expiration times';
+	}
+
+	public function run(IOutput $output) {
+		$qb = $this->connection->getQueryBuilder();
+		$qb->select('*')
+			->from('oauth2_access_tokens');
+
+		$cursor = $qb->execute();
+
+		while($row = $cursor->fetch()) {
+			$token = AccessToken::fromRow($row);
+			try {
+				$appToken = $this->tokenProvider->getTokenById($token->getTokenId());
+				$appToken->setExpires($this->time->getTime() + 3600);
+				$this->tokenProvider->updateToken($appToken);
+			} catch (InvalidTokenException $e) {
+				//Skip this token
+			}
+		}
+		$cursor->closeCursor();
+	}
+
+}

apps/oauth2/tests/Controller/LoginRedirectorControllerTest.php

@@ -86,6 +86,24 @@ public function testAuthorize() {
 			->willReturn('https://example.com/?clientIdentifier=foo');
 
 		$expected = new RedirectResponse('https://example.com/?clientIdentifier=foo');
-		$this->assertEquals($expected, $this->loginRedirectorController->authorize('MyClientId', 'MyState'));
+		$this->assertEquals($expected, $this->loginRedirectorController->authorize('MyClientId', 'MyState', 'code'));
+	}
+
+	public function testAuthorizeWrongResponseType() {
+		$client = new Client();
+		$client->setClientIdentifier('MyClientIdentifier');
+		$client->setRedirectUri('http://foo.bar');
+		$this->clientMapper
+			->expects($this->once())
+			->method('getByIdentifier')
+			->with('MyClientId')
+			->willReturn($client);
+		$this->session
+			->expects($this->never())
+			->method('set');
+
+
+		$expected = new RedirectResponse('http://foo.bar?error=unsupported_response_type&state=MyState');
+		$this->assertEquals($expected, $this->loginRedirectorController->authorize('MyClientId', 'MyState', 'wrongcode'));
 	}
 }