Merge pull request #21416 from nextcloud/fix/user-deleted-token-cleanup

Clean up auth tokens when user is deleted

5 files changed, 193 insertions, 0 deletions

diff --git a/core/Application.php b/core/Application.php
index 217b6ac41e9..ccfad5c18df 100644
--- a/core/Application.php
+++ b/core/Application.php
@@ -36,6 +36,7 @@ use OC\Authentication\Listeners\RemoteWipeActivityListener;
 use OC\Authentication\Listeners\RemoteWipeEmailListener;
 use OC\Authentication\Listeners\RemoteWipeNotificationsListener;
 use OC\Authentication\Listeners\UserDeletedStoreCleanupListener;
+use OC\Authentication\Listeners\UserDeletedTokenCleanupListener;
 use OC\Authentication\Notifications\Notifier as AuthenticationNotifier;
 use OC\Core\Notification\RemoveLinkSharesNotifier;
 use OC\DB\MissingColumnInformation;
@@ -197,5 +198,6 @@ class Application extends App {
 		$eventDispatcher->addServiceListener(RemoteWipeFinished::class, RemoteWipeNotificationsListener::class);
 		$eventDispatcher->addServiceListener(RemoteWipeFinished::class, RemoteWipeEmailListener::class);
 		$eventDispatcher->addServiceListener(UserDeletedEvent::class, UserDeletedStoreCleanupListener::class);
+		$eventDispatcher->addServiceListener(UserDeletedEvent::class, UserDeletedTokenCleanupListener::class);
 	}
 }
diff --git a/lib/composer/composer/autoload_classmap.php b/lib/composer/composer/autoload_classmap.php
index bbd9a6ef8c0..930a14df5d5 100644
--- a/lib/composer/composer/autoload_classmap.php
+++ b/lib/composer/composer/autoload_classmap.php
@@ -633,6 +633,7 @@ return array(
     'OC\\Authentication\\Listeners\\RemoteWipeEmailListener' => $baseDir . '/lib/private/Authentication/Listeners/RemoteWipeEmailListener.php',
     'OC\\Authentication\\Listeners\\RemoteWipeNotificationsListener' => $baseDir . '/lib/private/Authentication/Listeners/RemoteWipeNotificationsListener.php',
     'OC\\Authentication\\Listeners\\UserDeletedStoreCleanupListener' => $baseDir . '/lib/private/Authentication/Listeners/UserDeletedStoreCleanupListener.php',
+    'OC\\Authentication\\Listeners\\UserDeletedTokenCleanupListener' => $baseDir . '/lib/private/Authentication/Listeners/UserDeletedTokenCleanupListener.php',
     'OC\\Authentication\\LoginCredentials\\Credentials' => $baseDir . '/lib/private/Authentication/LoginCredentials/Credentials.php',
     'OC\\Authentication\\LoginCredentials\\Store' => $baseDir . '/lib/private/Authentication/LoginCredentials/Store.php',
     'OC\\Authentication\\Login\\ALoginCommand' => $baseDir . '/lib/private/Authentication/Login/ALoginCommand.php',
diff --git a/lib/composer/composer/autoload_static.php b/lib/composer/composer/autoload_static.php
index b0b0aa0edf0..9539dbc1a4b 100644
--- a/lib/composer/composer/autoload_static.php
+++ b/lib/composer/composer/autoload_static.php
@@ -662,6 +662,7 @@ class ComposerStaticInit53792487c5a8370acc0b06b1a864ff4c
         'OC\\Authentication\\Listeners\\RemoteWipeEmailListener' => __DIR__ . '/../../..' . '/lib/private/Authentication/Listeners/RemoteWipeEmailListener.php',
         'OC\\Authentication\\Listeners\\RemoteWipeNotificationsListener' => __DIR__ . '/../../..' . '/lib/private/Authentication/Listeners/RemoteWipeNotificationsListener.php',
         'OC\\Authentication\\Listeners\\UserDeletedStoreCleanupListener' => __DIR__ . '/../../..' . '/lib/private/Authentication/Listeners/UserDeletedStoreCleanupListener.php',
+        'OC\\Authentication\\Listeners\\UserDeletedTokenCleanupListener' => __DIR__ . '/../../..' . '/lib/private/Authentication/Listeners/UserDeletedTokenCleanupListener.php',
         'OC\\Authentication\\LoginCredentials\\Credentials' => __DIR__ . '/../../..' . '/lib/private/Authentication/LoginCredentials/Credentials.php',
         'OC\\Authentication\\LoginCredentials\\Store' => __DIR__ . '/../../..' . '/lib/private/Authentication/LoginCredentials/Store.php',
         'OC\\Authentication\\Login\\ALoginCommand' => __DIR__ . '/../../..' . '/lib/private/Authentication/Login/ALoginCommand.php',
diff --git a/lib/private/Authentication/Listeners/UserDeletedTokenCleanupListener.php b/lib/private/Authentication/Listeners/UserDeletedTokenCleanupListener.php
new file mode 100644
index 00000000000..d6238eb5ac8
--- /dev/null
+++ b/lib/private/Authentication/Listeners/UserDeletedTokenCleanupListener.php
@@ -0,0 +1,72 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright 2020 Christoph Wurst <christoph@winzerhof-wurst.at>
+ *
+ * @author 2020 Christoph Wurst <christoph@winzerhof-wurst.at>
+ *
+ * @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 OC\Authentication\Listeners;
+
+use OC\Authentication\Token\Manager;
+use OCP\EventDispatcher\Event;
+use OCP\EventDispatcher\IEventListener;
+use OCP\ILogger;
+use OCP\User\Events\UserDeletedEvent;
+use Throwable;
+
+class UserDeletedTokenCleanupListener implements IEventListener {
+
+	/** @var Manager */
+	private $manager;
+
+	/** @var ILogger */
+	private $logger;
+
+	public function __construct(Manager $manager,
+								ILogger $logger) {
+		$this->manager = $manager;
+		$this->logger = $logger;
+	}
+
+	public function handle(Event $event): void {
+		if (!($event instanceof UserDeletedEvent)) {
+			// Unrelated
+			return;
+		}
+
+		/**
+		 * Catch any exception during this process as any failure here shouldn't block the
+		 * user deletion.
+		 */
+		try {
+			$uid = $event->getUser()->getUID();
+			$tokens = $this->manager->getTokenByUser($uid);
+			foreach ($tokens as $token) {
+				$this->manager->invalidateTokenById($uid, $token->getId());
+			}
+		} catch (Throwable $e) {
+			$this->logger->logException($e, [
+				'message' => 'Could not clean up auth tokens after user deletion: ' . $e->getMessage(),
+				'error' => ILogger::ERROR,
+			]);
+		}
+	}
+}
diff --git a/tests/lib/Authentication/Listeners/UserDeletedTokenCleanupListenerTest.php b/tests/lib/Authentication/Listeners/UserDeletedTokenCleanupListenerTest.php
new file mode 100644
index 00000000000..672a044ce01
--- /dev/null
+++ b/tests/lib/Authentication/Listeners/UserDeletedTokenCleanupListenerTest.php
@@ -0,0 +1,117 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright 2020 Christoph Wurst <christoph@winzerhof-wurst.at>
+ *
+ * @author 2020 Christoph Wurst <christoph@winzerhof-wurst.at>
+ *
+ * @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 Test\Authentication\Listeners;
+
+use Exception;
+use OC\Authentication\Listeners\UserDeletedTokenCleanupListener;
+use OC\Authentication\Token\IToken;
+use OC\Authentication\Token\Manager;
+use OCP\EventDispatcher\Event;
+use OCP\ILogger;
+use OCP\IUser;
+use OCP\User\Events\UserDeletedEvent;
+use PHPUnit\Framework\MockObject\MockObject;
+use Test\TestCase;
+
+class UserDeletedTokenCleanupListenerTest extends TestCase {
+
+
+	/** @var Manager|MockObject */
+	private $manager;
+
+	/** @var ILogger|MockObject */
+	private $logger;
+
+	/** @var UserDeletedTokenCleanupListener */
+	private $listener;
+
+	protected function setUp(): void {
+		parent::setUp();
+
+		$this->manager = $this->createMock(Manager::class);
+		$this->logger = $this->createMock(ILogger::class);
+
+		$this->listener = new UserDeletedTokenCleanupListener(
+			$this->manager,
+			$this->logger
+		);
+	}
+
+	public function testHandleUnrelated(): void {
+		$event = new Event();
+		$this->manager->expects($this->never())->method('getTokenByUser');
+		$this->logger->expects($this->never())->method('logException');
+
+		$this->listener->handle($event);
+	}
+
+	public function testHandleWithErrors(): void {
+		$user = $this->createMock(IUser::class);
+		$user->method('getUID')->willReturn('user123');
+		$event = new UserDeletedEvent($user);
+		$exception = new Exception('nope');
+		$this->manager->expects($this->once())
+			->method('getTokenByUser')
+			->with('user123')
+			->willThrowException($exception);
+		$this->logger->expects($this->once())
+			->method('logException')
+			->with($exception, $this->anything());
+
+		$this->listener->handle($event);
+	}
+
+	public function testHandle(): void {
+		$user = $this->createMock(IUser::class);
+		$user->method('getUID')->willReturn('user123');
+		$event = new UserDeletedEvent($user);
+		$token1 = $this->createMock(IToken::class);
+		$token1->method('getId')->willReturn(1);
+		$token2 = $this->createMock(IToken::class);
+		$token2->method('getId')->willReturn(2);
+		$token3 = $this->createMock(IToken::class);
+		$token3->method('getId')->willReturn(3);
+		$this->manager->expects($this->once())
+			->method('getTokenByUser')
+			->with('user123')
+			->willReturn([
+				$token1,
+				$token2,
+				$token3,
+			]);
+		$this->manager->expects($this->exactly(3))
+			->method('invalidateTokenById')
+			->withConsecutive(
+				['user123', 1],
+				['user123', 2],
+				['user123', 3]
+			);
+		$this->logger->expects($this->never())
+			->method('logException');
+
+		$this->listener->handle($event);
+	}
+}