Reset bruteforce on token refresh OAuth

When using atoken obtained via OAuth the token expires. Resulting in
brute force attempts hitting the requesting IP.

This resets the brute force attempts for that UID on a valid refresh of
the token.

Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>

apps/oauth2/lib/Controller/OauthApiController.php

@@ -24,6 +24,7 @@ namespace OCA\OAuth2\Controller;
 use OC\Authentication\Exceptions\InvalidTokenException;
 use OC\Authentication\Token\ExpiredTokenException;
 use OC\Authentication\Token\IProvider as TokenProvider;
+use OC\Security\Bruteforce\Throttler;
 use OCA\OAuth2\Db\AccessTokenMapper;
 use OCA\OAuth2\Db\ClientMapper;
 use OCA\OAuth2\Exceptions\AccessTokenNotFoundException;
@@ -49,6 +50,8 @@ class OauthApiController extends Controller {
 	private $secureRandom;
 	/** @var ITimeFactory */
 	private $time;
+	/** @var Throttler */
+	private $throttler;
 
 	/**
 	 * @param string $appName
@@ -59,6 +62,7 @@ class OauthApiController extends Controller {
 	 * @param TokenProvider $tokenProvider
 	 * @param ISecureRandom $secureRandom
 	 * @param ITimeFactory $time
+	 * @param Throttler $throttler
 	 */
 	public function __construct($appName,
 								IRequest $request,
@@ -67,7 +71,8 @@ class OauthApiController extends Controller {
 								ClientMapper $clientMapper,
 								TokenProvider $tokenProvider,
 								ISecureRandom $secureRandom,
-								ITimeFactory $time) {
+								ITimeFactory $time,
+								Throttler $throttler) {
 		parent::__construct($appName, $request);
 		$this->crypto = $crypto;
 		$this->accessTokenMapper = $accessTokenMapper;
@@ -75,6 +80,7 @@ class OauthApiController extends Controller {
 		$this->tokenProvider = $tokenProvider;
 		$this->secureRandom = $secureRandom;
 		$this->time = $time;
+		$this->throttler = $throttler;
 	}
 
 	/**
@@ -164,6 +170,8 @@ class OauthApiController extends Controller {
 		$accessToken->setEncryptedToken($this->crypto->encrypt($newToken, $newCode));
 		$this->accessTokenMapper->update($accessToken);
 
+		$this->throttler->resetDelay($this->request->getRemoteAddress(), 'login', ['user' => $appToken->getUID()]);
+
 		return new JSONResponse(
 			[
 				'access_token' => $newToken,

apps/oauth2/tests/Controller/OauthApiControllerTest.php

@@ -27,6 +27,7 @@ use OC\Authentication\Token\DefaultTokenMapper;
 use OC\Authentication\Token\ExpiredTokenException;
 use OC\Authentication\Token\IProvider as TokenProvider;
 use OC\Authentication\Token\IToken;
+use OC\Security\Bruteforce\Throttler;
 use OCA\OAuth2\Controller\OauthApiController;
 use OCA\OAuth2\Db\AccessToken;
 use OCA\OAuth2\Db\AccessTokenMapper;
@@ -57,6 +58,8 @@ class OauthApiControllerTest extends TestCase {
 	private $secureRandom;
 	/** @var ITimeFactory|\PHPUnit_Framework_MockObject_MockObject */
 	private $time;
+	/** @var Throttler|\PHPUnit_Framework_MockObject_MockObject */
+	private $throttler;
 	/** @var OauthApiController */
 	private $oauthApiController;
 
@@ -70,6 +73,7 @@ class OauthApiControllerTest extends TestCase {
 		$this->tokenProvider = $this->createMock(TokenProvider::class);
 		$this->secureRandom = $this->createMock(ISecureRandom::class);
 		$this->time = $this->createMock(ITimeFactory::class);
+		$this->throttler = $this->createMock(Throttler::class);
 
 		$this->oauthApiController = new OauthApiController(
 			'oauth2',
@@ -79,7 +83,8 @@ class OauthApiControllerTest extends TestCase {
 			$this->clientMapper,
 			$this->tokenProvider,
 			$this->secureRandom,
-			$this->time
+			$this->time,
+			$this->throttler
 		);
 	}
 
@@ -286,6 +291,17 @@ class OauthApiControllerTest extends TestCase {
 			'user_id' => 'userId',
 		]);
 
+		$this->request->method('getRemoteAddress')
+			->willReturn('1.2.3.4');
+
+		$this->throttler->expects($this->once())
+			->method('resetDelay')
+			->with(
+				'1.2.3.4',
+				'login',
+				['user' => 'userId']
+			);
+
 		$this->assertEquals($expected, $this->oauthApiController->getToken('refresh_token', null, 'validrefresh', 'clientId', 'clientSecret'));
 	}
 
@@ -370,6 +386,17 @@ class OauthApiControllerTest extends TestCase {
 		$this->request->server['PHP_AUTH_USER'] = 'clientId';
 		$this->request->server['PHP_AUTH_PW'] = 'clientSecret';
 
+		$this->request->method('getRemoteAddress')
+			->willReturn('1.2.3.4');
+
+		$this->throttler->expects($this->once())
+			->method('resetDelay')
+			->with(
+				'1.2.3.4',
+				'login',
+				['user' => 'userId']
+			);
+
 		$this->assertEquals($expected, $this->oauthApiController->getToken('refresh_token', null, 'validrefresh', null, null));
 	}
 
@@ -451,6 +478,17 @@ class OauthApiControllerTest extends TestCase {
 			'user_id' => 'userId',
 		]);
 
+		$this->request->method('getRemoteAddress')
+			->willReturn('1.2.3.4');
+
+		$this->throttler->expects($this->once())
+			->method('resetDelay')
+			->with(
+				'1.2.3.4',
+				'login',
+				['user' => 'userId']
+			);
+
 		$this->assertEquals($expected, $this->oauthApiController->getToken('refresh_token', null, 'validrefresh', 'clientId', 'clientSecret'));
 	}
 }

lib/private/Server.php

@@ -758,7 +758,7 @@ class Server extends ServerContainer implements IServerContainer {
 		$this->registerService('TrustedDomainHelper', function ($c) {
 			return new TrustedDomainHelper($this->getConfig());
 		});
-		$this->registerService('Throttler', function (Server $c) {
+		$this->registerService(Throttler::class, function (Server $c) {
 			return new Throttler(
 				$c->getDatabaseConnection(),
 				new TimeFactory(),
@@ -766,6 +766,7 @@ class Server extends ServerContainer implements IServerContainer {
 				$c->getConfig()
 			);
 		});
+		$this->registerAlias('Throttler', Throttler::class);
 		$this->registerService('IntegrityCodeChecker', function (Server $c) {
 			// IConfig and IAppManager requires a working database. This code
 			// might however be called when ownCloud is not yet setup.