Merge pull request #4704 from nextcloud/add-oauth-code-flow-support

Add oauth code flow support

30 files changed, 1650 insertions, 6 deletions

diff --git a/apps/dav/appinfo/v1/publicwebdav.php b/apps/dav/appinfo/v1/publicwebdav.php
index 95fb71032d5..3ef1c2e62a5 100644
--- a/apps/dav/appinfo/v1/publicwebdav.php
+++ b/apps/dav/appinfo/v1/publicwebdav.php
@@ -42,6 +42,7 @@ $authBackend = new OCA\DAV\Connector\PublicAuth(
 	\OC::$server->getShareManager(),
 	\OC::$server->getSession()
 );
+$authPlugin = new \Sabre\DAV\Auth\Plugin($authBackend);
 
 $serverFactory = new OCA\DAV\Connector\Sabre\ServerFactory(
 	\OC::$server->getConfig(),
@@ -59,7 +60,7 @@ $requestUri = \OC::$server->getRequest()->getRequestUri();
 $linkCheckPlugin = new \OCA\DAV\Files\Sharing\PublicLinkCheckPlugin();
 $filesDropPlugin = new \OCA\DAV\Files\Sharing\FilesDropPlugin();
 
-$server = $serverFactory->createServer($baseuri, $requestUri, $authBackend, function (\Sabre\DAV\Server $server) use ($authBackend, $linkCheckPlugin, $filesDropPlugin) {
+$server = $serverFactory->createServer($baseuri, $requestUri, $authPlugin, function (\Sabre\DAV\Server $server) use ($authBackend, $linkCheckPlugin, $filesDropPlugin) {
 	$isAjax = (isset($_SERVER['HTTP_X_REQUESTED_WITH']) && $_SERVER['HTTP_X_REQUESTED_WITH'] === 'XMLHttpRequest');
 	$federatedSharingApp = new \OCA\FederatedFileSharing\AppInfo\Application();
 	$federatedShareProvider = $federatedSharingApp->getFederatedShareProvider();
diff --git a/apps/dav/appinfo/v1/webdav.php b/apps/dav/appinfo/v1/webdav.php
index 32f93b27760..a1ad4ab489d 100644
--- a/apps/dav/appinfo/v1/webdav.php
+++ b/apps/dav/appinfo/v1/webdav.php
@@ -52,9 +52,17 @@ $authBackend = new \OCA\DAV\Connector\Sabre\Auth(
 	\OC::$server->getBruteForceThrottler(),
 	'principals/'
 );
+$authPlugin = new \Sabre\DAV\Auth\Plugin($authBackend);
+$bearerAuthPlugin = new \OCA\DAV\Connector\Sabre\BearerAuth(
+	\OC::$server->getUserSession(),
+	\OC::$server->getSession(),
+	\OC::$server->getRequest()
+);
+$authPlugin->addBackend($bearerAuthPlugin);
+
 $requestUri = \OC::$server->getRequest()->getRequestUri();
 
-$server = $serverFactory->createServer($baseuri, $requestUri, $authBackend, function() {
+$server = $serverFactory->createServer($baseuri, $requestUri, $authPlugin, function() {
 	// use the view for the logged in user
 	return \OC\Files\Filesystem::getView();
 });
diff --git a/apps/dav/lib/Connector/Sabre/Auth.php b/apps/dav/lib/Connector/Sabre/Auth.php
index bdaf73d46e7..9147e79594c 100644
--- a/apps/dav/lib/Connector/Sabre/Auth.php
+++ b/apps/dav/lib/Connector/Sabre/Auth.php
@@ -210,6 +210,7 @@ class Auth extends AbstractBasic {
 	 */
 	private function auth(RequestInterface $request, ResponseInterface $response) {
 		$forcedLogout = false;
+
 		if(!$this->request->passesCSRFCheck() &&
 			$this->requiresCSRFCheck()) {
 			// In case of a fail with POST we need to recheck the credentials
diff --git a/apps/dav/lib/Connector/Sabre/BearerAuth.php b/apps/dav/lib/Connector/Sabre/BearerAuth.php
new file mode 100644
index 00000000000..f0e0f389c33
--- /dev/null
+++ b/apps/dav/lib/Connector/Sabre/BearerAuth.php
@@ -0,0 +1,80 @@
+<?php
+/**
+ * @copyright Copyright (c) 2017 Lukas Reschke <lukas@statuscode.ch>
+ *
+ * @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\DAV\Connector\Sabre;
+
+use OCP\IRequest;
+use OCP\ISession;
+use OCP\IUserSession;
+use Sabre\DAV\Auth\Backend\AbstractBearer;
+
+class BearerAuth extends AbstractBearer {
+	/** @var IUserSession */
+	private $userSession;
+	/** @var ISession */
+	private $session;
+	/** @var IRequest */
+	private $request;
+	/** @var string */
+	private $principalPrefix;
+
+	/**
+	 * @param IUserSession $userSession
+	 * @param ISession $session
+	 * @param string $principalPrefix
+	 * @param IRequest $request
+	 */
+	public function __construct(IUserSession $userSession,
+								ISession $session,
+								IRequest $request,
+								$principalPrefix = 'principals/users/') {
+		$this->userSession = $userSession;
+		$this->session = $session;
+		$this->request = $request;
+		$this->principalPrefix = $principalPrefix;
+
+		// setup realm
+		$defaults = new \OCP\Defaults();
+		$this->realm = $defaults->getName();
+	}
+
+	private function setupUserFs($userId) {
+		\OC_Util::setupFS($userId);
+		$this->session->close();
+		return $this->principalPrefix . $userId;
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function validateBearerToken($bearerToken) {
+		\OC_Util::setupFS();
+
+		if(!$this->userSession->isLoggedIn()) {
+			$this->userSession->tryTokenLogin($this->request);
+		}
+		if($this->userSession->isLoggedIn()) {
+			return $this->setupUserFs($this->userSession->getUser()->getUID());
+		}
+
+		return false;
+	}
+}
diff --git a/apps/dav/lib/Connector/Sabre/ServerFactory.php b/apps/dav/lib/Connector/Sabre/ServerFactory.php
index f04362dfc08..329aa335ea4 100644
--- a/apps/dav/lib/Connector/Sabre/ServerFactory.php
+++ b/apps/dav/lib/Connector/Sabre/ServerFactory.php
@@ -40,6 +40,7 @@ use OCP\IRequest;
 use OCP\ITagManager;
 use OCP\IUserSession;
 use Sabre\DAV\Auth\Backend\BackendInterface;
+use Sabre\DAV\Auth\Plugin;
 
 class ServerFactory {
 	/** @var IConfig */
@@ -92,13 +93,13 @@ class ServerFactory {
 	/**
 	 * @param string $baseUri
 	 * @param string $requestUri
-	 * @param BackendInterface $authBackend
+	 * @param Plugin $authPlugin
 	 * @param callable $viewCallBack callback that should return the view for the dav endpoint
 	 * @return Server
 	 */
 	public function createServer($baseUri,
 								 $requestUri,
-								 BackendInterface $authBackend,
+								 Plugin $authPlugin,
 								 callable $viewCallBack) {
 		// Fire up server
 		$objectTree = new \OCA\DAV\Connector\Sabre\ObjectTree();
@@ -110,7 +111,7 @@ class ServerFactory {
 		// Load plugins
 		$server->addPlugin(new \OCA\DAV\Connector\Sabre\MaintenancePlugin($this->config));
 		$server->addPlugin(new \OCA\DAV\Connector\Sabre\BlockLegacyClientPlugin($this->config));
-		$server->addPlugin(new \Sabre\DAV\Auth\Plugin($authBackend));
+		$server->addPlugin($authPlugin);
 		// FIXME: The following line is a workaround for legacy components relying on being able to send a GET to /
 		$server->addPlugin(new \OCA\DAV\Connector\Sabre\DummyGetResponsePlugin());
 		$server->addPlugin(new \OCA\DAV\Connector\Sabre\ExceptionLoggerPlugin('webdav', $this->logger));
diff --git a/apps/dav/lib/Server.php b/apps/dav/lib/Server.php
index df5b0ea05b6..994ac04033a 100644
--- a/apps/dav/lib/Server.php
+++ b/apps/dav/lib/Server.php
@@ -33,6 +33,7 @@ use OCA\DAV\CardDAV\ImageExportPlugin;
 use OCA\DAV\CardDAV\PhotoCache;
 use OCA\DAV\Comments\CommentsPlugin;
 use OCA\DAV\Connector\Sabre\Auth;
+use OCA\DAV\Connector\Sabre\BearerAuth;
 use OCA\DAV\Connector\Sabre\BlockLegacyClientPlugin;
 use OCA\DAV\Connector\Sabre\CommentPropertiesPlugin;
 use OCA\DAV\Connector\Sabre\CopyEtagHeaderPlugin;
@@ -52,6 +53,7 @@ use OCP\SabrePluginEvent;
 use Sabre\CardDAV\VCFExportPlugin;
 use Sabre\DAV\Auth\Plugin;
 use OCA\DAV\Connector\Sabre\TagsPlugin;
+use Sabre\HTTP\Auth\Bearer;
 use SearchDAV\DAV\SearchPlugin;
 
 class Server {
@@ -100,6 +102,12 @@ class Server {
 		$event = new SabrePluginEvent($this->server);
 		$dispatcher->dispatch('OCA\DAV\Connector\Sabre::authInit', $event);
 
+		$bearerAuthBackend = new BearerAuth(
+			\OC::$server->getUserSession(),
+			\OC::$server->getSession(),
+			\OC::$server->getRequest()
+		);
+		$authPlugin->addBackend($bearerAuthBackend);
 		// because we are throwing exceptions this plugin has to be the last one
 		$authPlugin->addBackend($authBackend);
 
diff --git a/apps/dav/tests/unit/Connector/Sabre/BearerAuthTest.php b/apps/dav/tests/unit/Connector/Sabre/BearerAuthTest.php
new file mode 100644
index 00000000000..5eae75eb8e9
--- /dev/null
+++ b/apps/dav/tests/unit/Connector/Sabre/BearerAuthTest.php
@@ -0,0 +1,88 @@
+<?php
+/**
+ * @copyright Copyright (c) 2017 Lukas Reschke <lukas@statuscode.ch>
+ *
+ * @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\DAV\Tests\unit\Connector\Sabre;
+
+use OC\Authentication\TwoFactorAuth\Manager;
+use OC\Security\Bruteforce\Throttler;
+use OC\User\Session;
+use OCA\DAV\Connector\Sabre\BearerAuth;
+use OCP\IRequest;
+use OCP\ISession;
+use OCP\IUser;
+use OCP\IUserSession;
+use Sabre\HTTP\RequestInterface;
+use Sabre\HTTP\ResponseInterface;
+use Test\TestCase;
+
+/**
+ * @group DB
+ */
+class BearerAuthTest extends TestCase {
+	/** @var IUserSession|\PHPUnit_Framework_MockObject_MockObject */
+	private $userSession;
+	/** @var ISession|\PHPUnit_Framework_MockObject_MockObject */
+	private $session;
+	/** @var IRequest|\PHPUnit_Framework_MockObject_MockObject */
+	private $request;
+	/** @var BearerAuth */
+	private $bearerAuth;
+
+	public function setUp() {
+		parent::setUp();
+
+		$this->userSession = $this->createMock(\OC\User\Session::class);
+		$this->session = $this->createMock(ISession::class);
+		$this->request = $this->createMock(IRequest::class);
+
+		$this->bearerAuth = new BearerAuth(
+			$this->userSession,
+			$this->session,
+			$this->request
+		);
+	}
+
+	public function testValidateBearerTokenNotLoggedIn() {
+		$this->assertFalse($this->bearerAuth->validateBearerToken('Token'));
+	}
+
+	public function testValidateBearerToken() {
+		$this->userSession
+			->expects($this->at(0))
+			->method('isLoggedIn')
+			->willReturn(false);
+		$this->userSession
+			->expects($this->at(2))
+			->method('isLoggedIn')
+			->willReturn(true);
+		$user = $this->createMock(IUser::class);
+		$user
+			->expects($this->once())
+			->method('getUID')
+			->willReturn('admin');
+		$this->userSession
+			->expects($this->once())
+			->method('getUser')
+			->willReturn($user);
+
+		$this->assertSame('principals/users/admin', $this->bearerAuth->validateBearerToken('Token'));
+	}
+}
diff --git a/apps/dav/tests/unit/Connector/Sabre/RequestTest/RequestTestCase.php b/apps/dav/tests/unit/Connector/Sabre/RequestTest/RequestTestCase.php
index 50e228b7e84..58a729e18ec 100644
--- a/apps/dav/tests/unit/Connector/Sabre/RequestTest/RequestTestCase.php
+++ b/apps/dav/tests/unit/Connector/Sabre/RequestTest/RequestTestCase.php
@@ -138,8 +138,9 @@ abstract class RequestTestCase extends TestCase {
 	 */
 	protected function getSabreServer(View $view, $user, $password, ExceptionPlugin $exceptionPlugin) {
 		$authBackend = new Auth($user, $password);
+		$authPlugin = new \Sabre\DAV\Auth\Plugin($authBackend);
 
-		$server = $this->serverFactory->createServer('/', 'dummy', $authBackend, function () use ($view) {
+		$server = $this->serverFactory->createServer('/', 'dummy', $authPlugin, function () use ($view) {
 			return $view;
 		});
 		$server->addPlugin($exceptionPlugin);
diff --git a/apps/oauth2/appinfo/database.xml b/apps/oauth2/appinfo/database.xml
new file mode 100644
index 00000000000..db32e0cf97d
--- /dev/null
+++ b/apps/oauth2/appinfo/database.xml
@@ -0,0 +1,100 @@
+<?xml version="1.0" encoding="ISO-8859-1" ?>
+<database xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="https://apps.nextcloud.com/schema/apps/database.xsd">
+	<name>*dbname*</name>
+	<create>true</create>
+	<overwrite>false</overwrite>
+	<charset>utf8</charset>
+	<table>
+		<name>*dbprefix*oauth2_clients</name>
+		<declaration>
+			<field>
+				<name>id</name>
+				<type>integer</type>
+				<notnull>true</notnull>
+				<autoincrement>true</autoincrement>
+				<unsigned>true</unsigned>
+				<primary>true</primary>
+			</field>
+			<field>
+				<name>name</name>
+				<type>text</type>
+				<notnull>true</notnull>
+				<length>64</length>
+			</field>
+			<field>
+				<name>redirect_uri</name>
+				<type>text</type>
+				<notnull>true</notnull>
+				<length>2000</length>
+			</field>
+			<field>
+				<name>client_identifier</name>
+				<type>text</type>
+				<notnull>true</notnull>
+				<length>64</length>
+			</field>
+			<field>
+				<name>secret</name>
+				<type>text</type>
+				<notnull>true</notnull>
+				<length>64</length>
+			</field>
+			<index>
+				<name>oauth2_client_id_idx</name>
+				<unique>false</unique>
+				<field>
+					<name>client_identifier</name>
+				</field>
+			</index>
+		</declaration>
+	</table>
+	<table>
+		<name>*dbprefix*oauth2_access_tokens</name>
+		<declaration>
+			<field>
+				<name>id</name>
+				<type>integer</type>
+				<notnull>true</notnull>
+				<autoincrement>true</autoincrement>
+				<unsigned>true</unsigned>
+				<primary>true</primary>
+			</field>
+			<field>
+				<name>token_id</name>
+				<type>integer</type>
+				<notnull>true</notnull>
+			</field>
+			<field>
+				<name>client_id</name>
+				<type>integer</type>
+				<notnull>true</notnull>
+			</field>
+			<field>
+				<name>hashed_code</name>
+				<type>text</type>
+				<notnull>true</notnull>
+				<length>128</length>
+			</field>
+			<field>
+				<name>encrypted_token</name>
+				<type>text</type>
+				<notnull>true</notnull>
+				<length>786</length>
+			</field>
+			<index>
+				<name>oauth2_access_hash_idx</name>
+				<unique>true</unique>
+				<field>
+					<name>hashed_code</name>
+				</field>
+			</index>
+			<index>
+				<name>oauth2_access_client_id_idx</name>
+				<unique>false</unique>
+				<field>
+					<name>client_id</name>
+				</field>
+			</index>
+		</declaration>
+	</table>
+</database>
diff --git a/apps/oauth2/appinfo/info.xml b/apps/oauth2/appinfo/info.xml
new file mode 100644
index 00000000000..5e9e8dae06a
--- /dev/null
+++ b/apps/oauth2/appinfo/info.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0"?>
+<info xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="https://apps.nextcloud.com/schema/apps/info.xsd">
+	<id>oauth2</id>
+	<name>OAuth 2.0</name>
+	<description>The OAuth2 app allows administrators to configure the built-in authentication workflow to also allow OAuth2 compatible authentication from other web applications.</description>
+	<licence>agpl</licence>
+	<author>Lukas Reschke</author>
+	<namespace>OAuth2</namespace>
+	<version>1.0.5</version>
+	<default_enable/>
+	<types>
+		<authentication/>
+	</types>
+
+	<settings>
+		<admin>OCA\OAuth2\Settings\Admin</admin>
+	</settings>
+</info>
diff --git a/apps/oauth2/appinfo/routes.php b/apps/oauth2/appinfo/routes.php
new file mode 100644
index 00000000000..84b1336e37e
--- /dev/null
+++ b/apps/oauth2/appinfo/routes.php
@@ -0,0 +1,45 @@
+<?php
+/**
+ * @copyright Copyright (c) 2017 Lukas Reschke <lukas@statuscode.ch>
+ *
+ * @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/>.
+ *
+ */
+
+return [
+	'routes' => [
+		[
+			'name' => 'Settings#addClient',
+			'url' => '/settings',
+			'verb' => 'POST',
+		],
+		[
+			'name' => 'Settings#deleteClient',
+			'url' => '/clients/{id}/delete',
+			'verb' => 'POST'
+		],
+		[
+			'name' => 'LoginRedirector#authorize',
+			'url' => '/authorize',
+			'verb' => 'GET',
+		],
+		[
+			'name' => 'OauthApi#getToken',
+			'url' => '/api/v1/token',
+			'verb' => 'POST'
+		],
+	],
+];
diff --git a/apps/oauth2/css/setting-admin.css b/apps/oauth2/css/setting-admin.css
new file mode 100644
index 00000000000..a57a56bb976
--- /dev/null
+++ b/apps/oauth2/css/setting-admin.css
@@ -0,0 +1,5 @@
+.show-oauth-credentials {
+	padding-left: 10px;
+	opacity: 0.3;
+	cursor: pointer;
+}
diff --git a/apps/oauth2/js/setting-admin.js b/apps/oauth2/js/setting-admin.js
new file mode 100644
index 00000000000..53163be1148
--- /dev/null
+++ b/apps/oauth2/js/setting-admin.js
@@ -0,0 +1,15 @@
+$(document).ready(function () {
+
+	$('.show-oauth-credentials').click(function() {
+		var row = $(this).parent();
+		var code = $(row).find('code');
+		if(code.text() === '****') {
+			code.text(row.data('value'));
+			$(this).css('opacity', 0.9);
+		} else {
+			code.text('****');
+			$(this).css('opacity', 0.3);
+		}
+	})
+
+});
diff --git a/apps/oauth2/lib/Controller/LoginRedirectorController.php b/apps/oauth2/lib/Controller/LoginRedirectorController.php
new file mode 100644
index 00000000000..9237b4b1b3c
--- /dev/null
+++ b/apps/oauth2/lib/Controller/LoginRedirectorController.php
@@ -0,0 +1,79 @@
+<?php
+/**
+ * @copyright Copyright (c) 2017 Lukas Reschke <lukas@statuscode.ch>
+ *
+ * @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\Controller;
+
+use OCA\OAuth2\Db\ClientMapper;
+use OCP\AppFramework\Controller;
+use OCP\AppFramework\Http\RedirectResponse;
+use OCP\IRequest;
+use OCP\ISession;
+use OCP\IURLGenerator;
+
+class LoginRedirectorController extends Controller {
+	/** @var IURLGenerator */
+	private $urlGenerator;
+	/** @var ClientMapper */
+	private $clientMapper;
+	/** @var ISession */
+	private $session;
+
+	/**
+	 * @param string $appName
+	 * @param IRequest $request
+	 * @param IURLGenerator $urlGenerator
+	 * @param ClientMapper $clientMapper
+	 * @param ISession $session
+	 */
+	public function __construct($appName,
+								IRequest $request,
+								IURLGenerator $urlGenerator,
+								ClientMapper $clientMapper,
+								ISession $session) {
+		parent::__construct($appName, $request);
+		$this->urlGenerator = $urlGenerator;
+		$this->clientMapper = $clientMapper;
+		$this->session = $session;
+	}
+
+	/**
+	 * @PublicPage
+	 * @NoCSRFRequired
+	 * @UseSession
+	 *
+	 * @param string $client_id
+	 * @param string $state
+	 * @return RedirectResponse
+	 */
+	public function authorize($client_id,
+							  $state) {
+		$client = $this->clientMapper->getByIdentifier($client_id);
+		$this->session->set('oauth.state', $state);
+
+		$targetUrl = $this->urlGenerator->linkToRouteAbsolute(
+			'core.ClientFlowLogin.showAuthPickerPage',
+			[
+				'clientIdentifier' => $client->getClientIdentifier(),
+			]
+		);
+		return new RedirectResponse($targetUrl);
+	}
+}
diff --git a/apps/oauth2/lib/Controller/OauthApiController.php b/apps/oauth2/lib/Controller/OauthApiController.php
new file mode 100644
index 00000000000..b97d85ae3e6
--- /dev/null
+++ b/apps/oauth2/lib/Controller/OauthApiController.php
@@ -0,0 +1,88 @@
+<?php
+/**
+ * @copyright Copyright (c) 2017 Lukas Reschke <lukas@statuscode.ch>
+ *
+ * @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\Controller;
+
+use OC\Authentication\Token\DefaultTokenMapper;
+use OCA\OAuth2\Db\AccessTokenMapper;
+use OCP\AppFramework\Controller;
+use OCP\AppFramework\Http\JSONResponse;
+use OCP\IRequest;
+use OCP\Security\ICrypto;
+use OCP\Security\ISecureRandom;
+
+class OauthApiController extends Controller {
+	/** @var AccessTokenMapper */
+	private $accessTokenMapper;
+	/** @var ICrypto */
+	private $crypto;
+	/** @var DefaultTokenMapper */
+	private $defaultTokenMapper;
+	/** @var ISecureRandom */
+	private $secureRandom;
+
+	/**
+	 * @param string $appName
+	 * @param IRequest $request
+	 * @param ICrypto $crypto
+	 * @param AccessTokenMapper $accessTokenMapper
+	 * @param DefaultTokenMapper $defaultTokenMapper
+	 * @param ISecureRandom $secureRandom
+	 */
+	public function __construct($appName,
+								IRequest $request,
+								ICrypto $crypto,
+								AccessTokenMapper $accessTokenMapper,
+								DefaultTokenMapper $defaultTokenMapper,
+								ISecureRandom $secureRandom) {
+		parent::__construct($appName, $request);
+		$this->crypto = $crypto;
+		$this->accessTokenMapper = $accessTokenMapper;
+		$this->defaultTokenMapper = $defaultTokenMapper;
+		$this->secureRandom = $secureRandom;
+	}
+
+	/**
+	 * @PublicPage
+	 * @NoCSRFRequired
+	 *
+	 * @param string $code
+	 * @return JSONResponse
+	 */
+	public function getToken($code) {
+		$accessToken = $this->accessTokenMapper->getByCode($code);
+		$decryptedToken = $this->crypto->decrypt($accessToken->getEncryptedToken(), $code);
+		$newCode = $this->secureRandom->generate(128);
+		$accessToken->setHashedCode(hash('sha512', $newCode));
+		$accessToken->setEncryptedToken($this->crypto->encrypt($decryptedToken, $newCode));
+		$this->accessTokenMapper->update($accessToken);
+
+		return new JSONResponse(
+			[
+				'access_token' => $decryptedToken,
+				'token_type' => 'Bearer',
+				'expires_in' => 3600,
+				'refresh_token' => $newCode,
+				'user_id' => $this->defaultTokenMapper->getTokenById($accessToken->getTokenId())->getUID(),
+			]
+		);
+	}
+}
diff --git a/apps/oauth2/lib/Controller/SettingsController.php b/apps/oauth2/lib/Controller/SettingsController.php
new file mode 100644
index 00000000000..f9ded6c0968
--- /dev/null
+++ b/apps/oauth2/lib/Controller/SettingsController.php
@@ -0,0 +1,100 @@
+<?php
+/**
+ * @copyright Copyright (c) 2017 Lukas Reschke <lukas@statuscode.ch>
+ *
+ * @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\Controller;
+
+use OC\Authentication\Token\DefaultTokenMapper;
+use OCA\OAuth2\Db\AccessTokenMapper;
+use OCA\OAuth2\Db\Client;
+use OCA\OAuth2\Db\ClientMapper;
+use OCP\AppFramework\Controller;
+use OCP\AppFramework\Http\RedirectResponse;
+use OCP\IRequest;
+use OCP\IURLGenerator;
+use OCP\Security\ISecureRandom;
+
+class SettingsController extends Controller {
+	/** @var IURLGenerator */
+	private $urlGenerator;
+	/** @var ClientMapper */
+	private $clientMapper;
+	/** @var ISecureRandom */
+	private $secureRandom;
+	/** @var AccessTokenMapper  */
+	private $accessTokenMapper;
+	/** @var  DefaultTokenMapper */
+	private $defaultTokenMapper;
+
+	const validChars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
+
+	/**
+	 * @param string $appName
+	 * @param IRequest $request
+	 * @param IURLGenerator $urlGenerator
+	 * @param ClientMapper $clientMapper
+	 * @param ISecureRandom $secureRandom
+	 * @param AccessTokenMapper $accessTokenMapper
+	 * @param DefaultTokenMapper $defaultTokenMapper
+	 */
+	public function __construct($appName,
+								IRequest $request,
+								IURLGenerator $urlGenerator,
+								ClientMapper $clientMapper,
+								ISecureRandom $secureRandom,
+								AccessTokenMapper $accessTokenMapper,
+								DefaultTokenMapper $defaultTokenMapper
+	) {
+		parent::__construct($appName, $request);
+		$this->urlGenerator = $urlGenerator;
+		$this->secureRandom = $secureRandom;
+		$this->clientMapper = $clientMapper;
+		$this->accessTokenMapper = $accessTokenMapper;
+		$this->defaultTokenMapper = $defaultTokenMapper;
+	}
+
+	/**
+	 * @param string $name
+	 * @param string $redirectUri
+	 * @return RedirectResponse
+	 */
+	public function addClient($name,
+							  $redirectUri) {
+		$client = new Client();
+		$client->setName($name);
+		$client->setRedirectUri($redirectUri);
+		$client->setSecret($this->secureRandom->generate(64, self::validChars));
+		$client->setClientIdentifier($this->secureRandom->generate(64, self::validChars));
+		$this->clientMapper->insert($client);
+		return new RedirectResponse($this->urlGenerator->getAbsoluteURL('/index.php/settings/admin/security'));
+	}
+
+	/**
+	 * @param int $id
+	 * @return RedirectResponse
+	 */
+	public function deleteClient($id) {
+		$client = $this->clientMapper->getByUid($id);
+		$this->accessTokenMapper->deleteByClientId($id);
+		$this->defaultTokenMapper->deleteByName($client->getName());
+		$this->clientMapper->delete($client);
+		return new RedirectResponse($this->urlGenerator->getAbsoluteURL('/index.php/settings/admin/security'));
+	}
+}
diff --git a/apps/oauth2/lib/Db/AccessToken.php b/apps/oauth2/lib/Db/AccessToken.php
new file mode 100644
index 00000000000..8266a9a0068
--- /dev/null
+++ b/apps/oauth2/lib/Db/AccessToken.php
@@ -0,0 +1,53 @@
+<?php
+/**
+ * @copyright Copyright (c) 2017 Lukas Reschke <lukas@statuscode.ch>
+ *
+ * @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\Db;
+
+use OCP\AppFramework\Db\Entity;
+
+/**
+ * @method int getTokenId()
+ * @method void setTokenId(int $identifier)
+ * @method int getClientId()
+ * @method void setClientId(int $identifier)
+ * @method string getEncryptedToken()
+ * @method void setEncryptedToken(string $token)
+ * @method string getHashedCode()
+ * @method void setHashedCode(string $token)
+ */
+class AccessToken extends Entity {
+	/** @var int */
+	protected $tokenId;
+	/** @var int */
+	protected $clientId;
+	/** @var string */
+	protected $hashedCode;
+	/** @var string */
+	protected $encryptedToken;
+
+	public function __construct() {
+		$this->addType('id', 'int');
+		$this->addType('token_id', 'int');
+		$this->addType('client_id', 'int');
+		$this->addType('hashed_code', 'string');
+		$this->addType('encrypted_token', 'string');
+	}
+}
diff --git a/apps/oauth2/lib/Db/AccessTokenMapper.php b/apps/oauth2/lib/Db/AccessTokenMapper.php
new file mode 100644
index 00000000000..2661c853372
--- /dev/null
+++ b/apps/oauth2/lib/Db/AccessTokenMapper.php
@@ -0,0 +1,70 @@
+<?php
+/**
+ * @copyright Copyright (c) 2017 Lukas Reschke <lukas@statuscode.ch>
+ *
+ * @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\Db;
+
+use OCA\OAuth2\Exceptions\AccessTokenNotFoundException;
+use OCP\AppFramework\Db\Mapper;
+use OCP\DB\QueryBuilder\IQueryBuilder;
+use OCP\IDBConnection;
+
+class AccessTokenMapper extends Mapper {
+
+	/**
+	 * @param IDBConnection $db
+	 */
+	public function __construct(IDBConnection $db) {
+		parent::__construct($db, 'oauth2_access_tokens');
+	}
+
+	/**
+	 * @param string $code
+	 * @return AccessToken
+	 * @throws AccessTokenNotFoundException
+	 */
+	public function getByCode($code) {
+		$qb = $this->db->getQueryBuilder();
+		$qb
+			->select('*')
+			->from($this->tableName)
+			->where($qb->expr()->eq('hashed_code', $qb->createNamedParameter(hash('sha512', $code))));
+		$result = $qb->execute();
+		$row = $result->fetch();
+		$result->closeCursor();
+		if($row === false) {
+			throw new AccessTokenNotFoundException();
+		}
+		return AccessToken::fromRow($row);
+	}
+
+	/**
+	 * delete all access token from a given client
+	 *
+	 * @param int $id
+	 */
+	public function deleteByClientId($id) {
+		$qb = $this->db->getQueryBuilder();
+		$qb
+			->delete($this->tableName)
+			->where($qb->expr()->eq('client_id', $qb->createNamedParameter($id, IQueryBuilder::PARAM_INT)));
+		$qb->execute();
+	}
+}
diff --git a/apps/oauth2/lib/Db/Client.php b/apps/oauth2/lib/Db/Client.php
new file mode 100644
index 00000000000..85c1630cb15
--- /dev/null
+++ b/apps/oauth2/lib/Db/Client.php
@@ -0,0 +1,53 @@
+<?php
+/**
+ * @copyright Copyright (c) 2017 Lukas Reschke <lukas@statuscode.ch>
+ *
+ * @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\Db;
+
+use OCP\AppFramework\Db\Entity;
+
+/**
+ * @method string getClientIdentifier()
+ * @method void setClientIdentifier(string $identifier)
+ * @method string getSecret()
+ * @method void setSecret(string $secret)
+ * @method string getRedirectUri()
+ * @method void setRedirectUri(string $redirectUri)
+ * @method string getName()
+ * @method void setName(string $name)
+ */
+class Client extends Entity {
+	/** @var string */
+	protected $name;
+	/** @var string */
+	protected $redirectUri;
+	/** @var string */
+	protected $clientIdentifier;
+	/** @var string */
+	protected $secret;
+
+	public function __construct() {
+		$this->addType('id', 'int');
+		$this->addType('name', 'string');
+		$this->addType('redirect_uri', 'string');
+		$this->addType('client_identifier', 'string');
+		$this->addType('secret', 'string');
+	}
+}
diff --git a/apps/oauth2/lib/Db/ClientMapper.php b/apps/oauth2/lib/Db/ClientMapper.php
new file mode 100644
index 00000000000..9df07e2789f
--- /dev/null
+++ b/apps/oauth2/lib/Db/ClientMapper.php
@@ -0,0 +1,89 @@
+<?php
+/**
+ * @copyright Copyright (c) 2017 Lukas Reschke <lukas@statuscode.ch>
+ *
+ * @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\Db;
+
+use OCA\OAuth2\Exceptions\ClientNotFoundException;
+use OCP\AppFramework\Db\Mapper;
+use OCP\DB\QueryBuilder\IQueryBuilder;
+use OCP\IDBConnection;
+
+class ClientMapper extends Mapper {
+
+	/**
+	 * @param IDBConnection $db
+	 */
+	public function __construct(IDBConnection $db) {
+		parent::__construct($db, 'oauth2_clients');
+	}
+
+	/**
+	 * @param string $clientIdentifier
+	 * @return Client
+	 * @throws ClientNotFoundException
+	 */
+	public function getByIdentifier($clientIdentifier) {
+		$qb = $this->db->getQueryBuilder();
+		$qb
+			->select('*')
+			->from($this->tableName)
+			->where($qb->expr()->eq('client_identifier', $qb->createNamedParameter($clientIdentifier)));
+		$result = $qb->execute();
+		$row = $result->fetch();
+		$result->closeCursor();
+		if($row === false) {
+			throw new ClientNotFoundException();
+		}
+		return Client::fromRow($row);
+	}
+
+	/**
+	 * @param string $uid internal uid of the client
+	 * @return Client
+	 * @throws ClientNotFoundException
+	 */
+	public function getByUid($uid) {
+		$qb = $this->db->getQueryBuilder();
+		$qb
+			->select('*')
+			->from($this->tableName)
+			->where($qb->expr()->eq('id', $qb->createNamedParameter($uid, IQueryBuilder::PARAM_INT)));
+		$result = $qb->execute();
+		$row = $result->fetch();
+		$result->closeCursor();
+		if($row === false) {
+			throw new ClientNotFoundException();
+		}
+		return Client::fromRow($row);
+	}
+
+	/**
+	 * @return Client[]
+	 */
+	public function getClients() {
+		$qb = $this->db->getQueryBuilder();
+		$qb
+			->select('*')
+			->from($this->tableName);
+
+		return $this->findEntities($qb->getSQL());
+	}
+}
diff --git a/apps/oauth2/lib/Exceptions/AccessTokenNotFoundException.php b/apps/oauth2/lib/Exceptions/AccessTokenNotFoundException.php
new file mode 100644
index 00000000000..a1eb632a9eb
--- /dev/null
+++ b/apps/oauth2/lib/Exceptions/AccessTokenNotFoundException.php
@@ -0,0 +1,24 @@
+<?php
+/**
+ * @copyright Copyright (c) 2017 Lukas Reschke <lukas@statuscode.ch>
+ *
+ * @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\Exceptions;
+
+class AccessTokenNotFoundException extends \Exception {}
diff --git a/apps/oauth2/lib/Exceptions/ClientNotFoundException.php b/apps/oauth2/lib/Exceptions/ClientNotFoundException.php
new file mode 100644
index 00000000000..b2395c7bc9e
--- /dev/null
+++ b/apps/oauth2/lib/Exceptions/ClientNotFoundException.php
@@ -0,0 +1,24 @@
+<?php
+/**
+ * @copyright Copyright (c) 2017 Lukas Reschke <lukas@statuscode.ch>
+ *
+ * @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\Exceptions;
+
+class ClientNotFoundException extends \Exception {}
diff --git a/apps/oauth2/lib/Settings/Admin.php b/apps/oauth2/lib/Settings/Admin.php
new file mode 100644
index 00000000000..07c3fe733ad
--- /dev/null
+++ b/apps/oauth2/lib/Settings/Admin.php
@@ -0,0 +1,66 @@
+<?php
+/**
+ * @copyright Copyright (c) 2017 Lukas Reschke <lukas@statuscode.ch>
+ *
+ * @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\Settings;
+
+use OCA\OAuth2\Db\ClientMapper;
+use OCP\AppFramework\Http\TemplateResponse;
+use OCP\Settings\ISettings;
+
+class Admin implements ISettings {
+	/** @var ClientMapper */
+	private $clientMapper;
+
+	/**
+	 * @param ClientMapper $clientMapper
+	 */
+	public function __construct(ClientMapper $clientMapper) {
+		$this->clientMapper = $clientMapper;
+	}
+
+	/**
+	 * @return TemplateResponse
+	 */
+	public function getForm() {
+		return new TemplateResponse(
+			'oauth2',
+			'admin',
+			[
+				'clients' => $this->clientMapper->getClients(),
+			],
+			''
+		);
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function getSection() {
+		return 'security';
+	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function getPriority() {
+		return 0;
+	}
+}
diff --git a/apps/oauth2/templates/admin.php b/apps/oauth2/templates/admin.php
new file mode 100644
index 00000000000..d2e34e08db8
--- /dev/null
+++ b/apps/oauth2/templates/admin.php
@@ -0,0 +1,76 @@
+<?php
+/**
+ * @copyright Copyright (c) 2017 Lukas Reschke <lukas@statuscode.ch>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+$urlGenerator = \OC::$server->getURLGenerator();
+$themingDefaults = \OC::$server->getThemingDefaults();
+
+script('oauth2', 'setting-admin');
+style('oauth2', 'setting-admin');
+
+/** @var array $_ */
+/** @var \OCA\OAuth2\Db\Client[] $clients */
+$clients = $_['clients'];
+?>
+
+<div id="oauth2" class="section">
+	<h2><?php p($l->t('OAuth 2.0 clients')); ?></h2>
+	<p class="settings-hint"><?php p($l->t('OAuth 2.0 allows external services to request access to your %s.', [$themingDefaults->getName()])); ?></p>
+
+	<table class="grid">
+		<thead>
+		<tr>
+			<th id="headerName" scope="col"><?php p($l->t('Name')); ?></th>
+			<th id="headerRedirectUri" scope="col"><?php p($l->t('Redirection URI')); ?></th>
+			<th id="headerClientIdentifier" scope="col"><?php p($l->t('Client Identifier')); ?></th>
+			<th id="headerSecret" scope="col"><?php p($l->t('Secret')); ?></th>
+			<th id="headerRemove">&nbsp;</th>
+		</tr>
+		</thead>
+		<tbody>
+		<?php
+		$imageUrl = $urlGenerator->imagePath('core', 'actions/toggle.svg');
+		foreach ($clients as $client) {
+		?>
+			<tr>
+				<td><?php p($client->getName()); ?></td>
+				<td><?php p($client->getRedirectUri()); ?></td>
+				<td><code><?php p($client->getClientIdentifier()); ?></code></td>
+				<td data-value="<?php p($client->getSecret()); ?>"><code>****</code><img class='show-oauth-credentials' src="<?php p($imageUrl); ?>"/></td>
+				<td>
+					<form id="form-inline" class="delete" action="<?php p($urlGenerator->linkToRoute('oauth2.Settings.deleteClient', ['id' => $client->getId()])); ?>" method="POST">
+						<input type="hidden" name="requesttoken" value="<?php p($_['requesttoken']) ?>" />
+						<input type="submit" class="button icon-delete" value="">
+					</form>
+				</td>
+			</tr>
+		<?php } ?>
+		</tbody>
+	</table>
+
+	<br/>
+	<h3><?php p($l->t('Add client')); ?></h3>
+	<form action="<?php p($urlGenerator->linkToRoute('oauth2.Settings.addClient')); ?>" method="POST">
+		<input type="text" id="name" name="name" placeholder="<?php p($l->t('Name')); ?>">
+		<input type="url" id="redirectUri" name="redirectUri" placeholder="<?php p($l->t('Redirection URI')); ?>">
+		<input type="hidden" name="requesttoken" value="<?php p($_['requesttoken']) ?>" />
+		<input type="submit" class="button" value="<?php p($l->t('Add')); ?>">
+	</form>
+</div>
diff --git a/apps/oauth2/tests/Controller/LoginRedirectorControllerTest.php b/apps/oauth2/tests/Controller/LoginRedirectorControllerTest.php
new file mode 100644
index 00000000000..b33d3379be4
--- /dev/null
+++ b/apps/oauth2/tests/Controller/LoginRedirectorControllerTest.php
@@ -0,0 +1,91 @@
+<?php
+/**
+ * @copyright Copyright (c) 2017 Lukas Reschke <lukas@statuscode.ch>
+ *
+ * @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\Tests\Controller;
+
+use OCA\Files_Sharing\Tests\TestCase;
+use OCA\OAuth2\Controller\LoginRedirectorController;
+use OCA\OAuth2\Db\Client;
+use OCA\OAuth2\Db\ClientMapper;
+use OCP\AppFramework\Http\RedirectResponse;
+use OCP\IRequest;
+use OCP\ISession;
+use OCP\IURLGenerator;
+
+/**
+ * @group DB
+ */
+class LoginRedirectorControllerTest extends TestCase {
+	/** @var IRequest|\PHPUnit_Framework_MockObject_MockObject */
+	private $request;
+	/** @var IURLGenerator|\PHPUnit_Framework_MockObject_MockObject */
+	private $urlGenerator;
+	/** @var ClientMapper|\PHPUnit_Framework_MockObject_MockObject */
+	private $clientMapper;
+	/** @var ISession|\PHPUnit_Framework_MockObject_MockObject */
+	private $session;
+	/** @var LoginRedirectorController */
+	private $loginRedirectorController;
+
+	public function setUp() {
+		parent::setUp();
+
+		$this->request = $this->createMock(IRequest::class);
+		$this->urlGenerator = $this->createMock(IURLGenerator::class);
+		$this->clientMapper = $this->createMock(ClientMapper::class);
+		$this->session = $this->createMock(ISession::class);
+
+		$this->loginRedirectorController = new LoginRedirectorController(
+			'oauth2',
+			$this->request,
+			$this->urlGenerator,
+			$this->clientMapper,
+			$this->session
+		);
+	}
+
+	public function testAuthorize() {
+		$client = new Client();
+		$client->setClientIdentifier('MyClientIdentifier');
+		$this->clientMapper
+			->expects($this->once())
+			->method('getByIdentifier')
+			->with('MyClientId')
+			->willReturn($client);
+		$this->session
+			->expects($this->once())
+			->method('set')
+			->with('oauth.state', 'MyState');
+		$this->urlGenerator
+			->expects($this->once())
+			->method('linkToRouteAbsolute')
+			->with(
+				'core.ClientFlowLogin.showAuthPickerPage',
+				[
+					'clientIdentifier' => 'MyClientIdentifier',
+				]
+			)
+			->willReturn('https://example.com/?clientIdentifier=foo');
+
+		$expected = new RedirectResponse('https://example.com/?clientIdentifier=foo');
+		$this->assertEquals($expected, $this->loginRedirectorController->authorize('MyClientId', 'MyState'));
+	}
+}
diff --git a/apps/oauth2/tests/Controller/OauthApiControllerTest.php b/apps/oauth2/tests/Controller/OauthApiControllerTest.php
new file mode 100644
index 00000000000..c90e2bf711f
--- /dev/null
+++ b/apps/oauth2/tests/Controller/OauthApiControllerTest.php
@@ -0,0 +1,106 @@
+<?php
+/**
+ * @copyright Copyright (c) 2017 Lukas Reschke <lukas@statuscode.ch>
+ *
+ * @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\Tests\Controller;
+
+use OC\Authentication\Token\DefaultToken;
+use OC\Authentication\Token\DefaultTokenMapper;
+use OCA\OAuth2\Controller\OauthApiController;
+use OCA\OAuth2\Db\AccessToken;
+use OCA\OAuth2\Db\AccessTokenMapper;
+use OCP\AppFramework\Http\JSONResponse;
+use OCP\IRequest;
+use OCP\Security\ICrypto;
+use OCP\Security\ISecureRandom;
+use Test\TestCase;
+
+class OauthApiControllerTest extends TestCase {
+	/** @var IRequest|\PHPUnit_Framework_MockObject_MockObject */
+	private $request;
+	/** @var ICrypto|\PHPUnit_Framework_MockObject_MockObject */
+	private $crypto;
+	/** @var AccessTokenMapper|\PHPUnit_Framework_MockObject_MockObject */
+	private $accessTokenMapper;
+	/** @var DefaultTokenMapper|\PHPUnit_Framework_MockObject_MockObject */
+	private $defaultTokenMapper;
+	/** @var ISecureRandom|\PHPUnit_Framework_MockObject_MockObject */
+	private $secureRandom;
+	/** @var OauthApiController */
+	private $oauthApiController;
+
+	public function setUp() {
+		parent::setUp();
+
+		$this->request = $this->createMock(IRequest::class);
+		$this->crypto = $this->createMock(ICrypto::class);
+		$this->accessTokenMapper = $this->createMock(AccessTokenMapper::class);
+		$this->defaultTokenMapper = $this->createMock(DefaultTokenMapper::class);
+		$this->secureRandom = $this->createMock(ISecureRandom::class);
+
+		$this->oauthApiController = new OauthApiController(
+			'oauth2',
+			$this->request,
+			$this->crypto,
+			$this->accessTokenMapper,
+			$this->defaultTokenMapper,
+			$this->secureRandom
+		);
+	}
+
+	public function testGetToken() {
+		$accessToken = new AccessToken();
+		$accessToken->setEncryptedToken('MyEncryptedToken');
+		$accessToken->setTokenId(123);
+		$this->accessTokenMapper
+			->expects($this->once())
+			->method('getByCode')
+			->willReturn($accessToken);
+		$this->crypto
+			->expects($this->once())
+			->method('decrypt')
+			->with('MyEncryptedToken', 'MySecretCode')
+			->willReturn('MyDecryptedToken');
+		$this->secureRandom
+			->expects($this->once())
+			->method('generate')
+			->with(128)
+			->willReturn('NewToken');
+		$token = new DefaultToken();
+		$token->setUid('JohnDoe');
+		$this->defaultTokenMapper
+			->expects($this->once())
+			->method('getTokenById')
+			->with(123)
+			->willReturn($token);
+
+		$expected = new JSONResponse(
+			[
+				'access_token' => 'MyDecryptedToken',
+				'token_type' => 'Bearer',
+				'expires_in' => 3600,
+				'refresh_token' => 'NewToken',
+				'user_id' => 'JohnDoe',
+			]
+		);
+		$this->assertEquals($expected, $this->oauthApiController->getToken('MySecretCode'));
+	}
+
+}
diff --git a/apps/oauth2/tests/Controller/SettingsControllerTest.php b/apps/oauth2/tests/Controller/SettingsControllerTest.php
new file mode 100644
index 00000000000..a6c036949ed
--- /dev/null
+++ b/apps/oauth2/tests/Controller/SettingsControllerTest.php
@@ -0,0 +1,139 @@
+<?php
+/**
+ * @copyright Copyright (c) 2017 Lukas Reschke <lukas@statuscode.ch>
+ *
+ * @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\Tests\Controller;
+
+use OC\Authentication\Token\DefaultTokenMapper;
+use OCA\OAuth2\Controller\SettingsController;
+use OCA\OAuth2\Db\AccessTokenMapper;
+use OCA\OAuth2\Db\Client;
+use OCA\OAuth2\Db\ClientMapper;
+use OCP\AppFramework\Http\RedirectResponse;
+use OCP\IRequest;
+use OCP\IURLGenerator;
+use OCP\Security\ISecureRandom;
+use Test\TestCase;
+
+class SettingsControllerTest extends TestCase {
+	/** @var IRequest|\PHPUnit_Framework_MockObject_MockObject */
+	private $request;
+	/** @var IURLGenerator|\PHPUnit_Framework_MockObject_MockObject */
+	private $urlGenerator;
+	/** @var ClientMapper|\PHPUnit_Framework_MockObject_MockObject */
+	private $clientMapper;
+	/** @var ISecureRandom|\PHPUnit_Framework_MockObject_MockObject */
+	private $secureRandom;
+	/** @var AccessTokenMapper|\PHPUnit_Framework_MockObject_MockObject */
+	private $accessTokenMapper;
+	/** @var DefaultTokenMapper|\PHPUnit_Framework_MockObject_MockObject */
+	private $defaultTokenMapper;
+	/** @var SettingsController */
+	private $settingsController;
+
+	public function setUp() {
+		parent::setUp();
+
+		$this->request = $this->createMock(IRequest::class);
+		$this->urlGenerator = $this->createMock(IURLGenerator::class);
+		$this->clientMapper = $this->createMock(ClientMapper::class);
+		$this->secureRandom = $this->createMock(ISecureRandom::class);
+		$this->accessTokenMapper = $this->createMock(AccessTokenMapper::class);
+		$this->defaultTokenMapper = $this->createMock(DefaultTokenMapper::class);
+
+		$this->settingsController = new SettingsController(
+			'oauth2',
+			$this->request,
+			$this->urlGenerator,
+			$this->clientMapper,
+			$this->secureRandom,
+			$this->accessTokenMapper,
+			$this->defaultTokenMapper
+		);
+	}
+
+	public function testAddClient() {
+		$this->secureRandom
+			->expects($this->at(0))
+			->method('generate')
+			->with(64, 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789')
+			->willReturn('MySecret');
+		$this->secureRandom
+			->expects($this->at(1))
+			->method('generate')
+			->with(64, 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789')
+			->willReturn('MyClientIdentifier');
+
+		$client = new Client();
+		$client->setName('My Client Name');
+		$client->setRedirectUri('https://example.com/');
+		$client->setSecret('MySecret');
+		$client->setClientIdentifier('MyClientIdentifier');
+
+		$this->clientMapper
+			->expects($this->once())
+			->method('insert')
+			->with($client);
+
+		$this->urlGenerator
+			->expects($this->once())
+			->method('getAbsoluteURL')
+			->with('/index.php/settings/admin/security')
+			->willReturn('https://example.com/index.php/settings/admin/security');
+
+		$expected = new RedirectResponse('https://example.com/index.php/settings/admin/security');
+		$this->assertEquals($expected, $this->settingsController->addClient('My Client Name', 'https://example.com/'));
+	}
+
+	public function testDeleteClient() {
+		$client = new Client();
+		$client->setName('My Client Name');
+		$client->setRedirectUri('https://example.com/');
+		$client->setSecret('MySecret');
+		$client->setClientIdentifier('MyClientIdentifier');
+
+		$this->clientMapper
+			->expects($this->at(0))
+			->method('getByUid')
+			->with(123)
+			->willReturn($client);
+		$this->accessTokenMapper
+			->expects($this->once())
+			->method('deleteByClientId')
+			->with(123);
+		$this->defaultTokenMapper
+			->expects($this->once())
+			->method('deleteByName')
+			->with('My Client Name');
+		$this->clientMapper
+			->expects($this->at(1))
+			->method('delete')
+			->with($client);
+
+		$this->urlGenerator
+			->expects($this->once())
+			->method('getAbsoluteURL')
+			->with('/index.php/settings/admin/security')
+			->willReturn('https://example.com/index.php/settings/admin/security');
+
+		$expected = new RedirectResponse('https://example.com/index.php/settings/admin/security');
+		$this->assertEquals($expected, $this->settingsController->deleteClient(123));
+	}
+}
diff --git a/apps/oauth2/tests/Db/AccessTokenMapperTest.php b/apps/oauth2/tests/Db/AccessTokenMapperTest.php
new file mode 100644
index 00000000000..ebc6b55a382
--- /dev/null
+++ b/apps/oauth2/tests/Db/AccessTokenMapperTest.php
@@ -0,0 +1,70 @@
+<?php
+/**
+ * @copyright Copyright (c) 2017 Lukas Reschke <lukas@statuscode.ch>
+ *
+ * @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\Tests\Db;
+
+use OCA\OAuth2\Db\AccessToken;
+use OCA\OAuth2\Db\AccessTokenMapper;
+use Test\TestCase;
+
+/**
+ * @group DB
+ */
+class AccessTokenMapperTest extends TestCase {
+	/** @var AccessTokenMapper */
+	private $accessTokenMapper;
+
+	public function setUp() {
+		parent::setUp();
+		$this->accessTokenMapper = new AccessTokenMapper(\OC::$server->getDatabaseConnection());
+	}
+
+	public function testGetByCode() {
+		$this->accessTokenMapper->deleteByClientId(1234);
+		$token = new AccessToken();
+		$token->setClientId(1234);
+		$token->setTokenId((string)time());
+		$token->setEncryptedToken('MyEncryptedToken');
+		$token->setHashedCode(hash('sha512', 'MyAwesomeToken'));
+		$this->accessTokenMapper->insert($token);
+		$token->resetUpdatedFields();
+
+		$result = $this->accessTokenMapper->getByCode('MyAwesomeToken');
+		$this->assertEquals($token, $result);
+		$this->accessTokenMapper->delete($token);
+	}
+
+	/**
+	 * @expectedException \OCA\OAuth2\Exceptions\AccessTokenNotFoundException
+	 */
+	public function testDeleteByClientId() {
+		$this->accessTokenMapper->deleteByClientId(1234);
+		$token = new AccessToken();
+		$token->setClientId(1234);
+		$token->setTokenId((string)time());
+		$token->setEncryptedToken('MyEncryptedToken');
+		$token->setHashedCode(hash('sha512', 'MyAwesomeToken'));
+		$this->accessTokenMapper->insert($token);
+		$token->resetUpdatedFields();
+		$this->accessTokenMapper->deleteByClientId(1234);
+		$this->accessTokenMapper->getByCode('MyAwesomeToken');
+	}
+}
diff --git a/apps/oauth2/tests/Db/ClientMapperTest.php b/apps/oauth2/tests/Db/ClientMapperTest.php
new file mode 100644
index 00000000000..80d69c3b1b8
--- /dev/null
+++ b/apps/oauth2/tests/Db/ClientMapperTest.php
@@ -0,0 +1,79 @@
+<?php
+/**
+ * @copyright Copyright (c) 2017 Lukas Reschke <lukas@statuscode.ch>
+ *
+ * @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\Tests\Db;
+
+use OCA\OAuth2\Db\Client;
+use OCA\OAuth2\Db\ClientMapper;
+use Test\TestCase;
+
+/**
+ * @group DB
+ */
+class ClientMapperTest extends TestCase {
+	/** @var ClientMapper */
+	private $clientMapper;
+
+	public function setUp() {
+		parent::setUp();
+		$this->clientMapper = new ClientMapper(\OC::$server->getDatabaseConnection());
+	}
+
+	public function testGetByIdentifier() {
+		$client = new Client();
+		$client->setClientIdentifier('MyAwesomeClientIdentifier');
+		$client->setName('Client Name');
+		$client->setRedirectUri('https://example.com/');
+		$client->setSecret('TotallyNotSecret');
+		$this->clientMapper->insert($client);
+		$client->resetUpdatedFields();
+		$this->assertEquals($client, $this->clientMapper->getByIdentifier('MyAwesomeClientIdentifier'));
+	}
+
+	/**
+	 * @expectedException \OCA\OAuth2\Exceptions\ClientNotFoundException
+	 */
+	public function testGetByIdentifierNotExisting() {
+		$this->clientMapper->getByIdentifier('MyTotallyNotExistingClient');
+	}
+
+	public function testGetByUid() {
+		$client = new Client();
+		$client->setClientIdentifier('MyNewClient');
+		$client->setName('Client Name');
+		$client->setRedirectUri('https://example.com/');
+		$client->setSecret('TotallyNotSecret');
+		$this->clientMapper->insert($client);
+		$client->resetUpdatedFields();
+		$this->assertEquals($client, $this->clientMapper->getByUid($client->getId()));
+	}
+
+	/**
+	 * @expectedException \OCA\OAuth2\Exceptions\ClientNotFoundException
+	 */
+	public function testGetByUidNotExisting() {
+		$this->clientMapper->getByUid(1234);
+	}
+
+	public function testGetClients() {
+		$this->assertSame('array', gettype($this->clientMapper->getClients()));
+	}
+}
diff --git a/apps/oauth2/tests/Settings/AdminTest.php b/apps/oauth2/tests/Settings/AdminTest.php
new file mode 100644
index 00000000000..9c3d5ed1449
--- /dev/null
+++ b/apps/oauth2/tests/Settings/AdminTest.php
@@ -0,0 +1,66 @@
+<?php
+/**
+ * @copyright Copyright (c) 2017 Lukas Reschke <lukas@statuscode.ch>
+ *
+ * @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\Tests\Settings;
+
+use OCA\OAuth2\Db\ClientMapper;
+use OCA\OAuth2\Settings\Admin;
+use OCP\AppFramework\Http\TemplateResponse;
+use Test\TestCase;
+
+class AdminTest extends TestCase {
+	/** @var ClientMapper|\PHPUnit_Framework_MockObject_MockObject */
+	private $clientMapper;
+	/** @var Admin|\PHPUnit_Framework_MockObject_MockObject */
+	private $admin;
+
+	public function setUp() {
+		parent::setUp();
+
+		$this->clientMapper = $this->createMock(ClientMapper::class);
+		$this->admin = new Admin($this->clientMapper);
+	}
+
+	public function testGetForm() {
+		$this->clientMapper
+			->expects($this->once())
+			->method('getClients')
+			->willReturn(['MyClients']);
+
+		$expected = new TemplateResponse(
+			'oauth2',
+			'admin',
+			[
+				'clients' => ['MyClients'],
+			],
+			''
+		);
+		$this->assertEquals($expected, $this->admin->getForm());
+	}
+
+	public function testGetSection() {
+		$this->assertSame('security', $this->admin->getSection());
+	}
+
+	public function testGetPriority() {
+		$this->assertSame(0, $this->admin->getPriority());
+	}
+}