[stable24] fix: delete user credentials stored in storages_credentials when user gets deleted

lib/composer/composer/autoload_classmap.php

@@ -1559,6 +1559,7 @@
     'OC\\User\\Database' => $baseDir . '/lib/private/User/Database.php',
     'OC\\User\\DisplayNameCache' => $baseDir . '/lib/private/User/DisplayNameCache.php',
     'OC\\User\\LazyUser' => $baseDir . '/lib/private/User/LazyUser.php',
+	'OC\\User\\Listeners\\BeforeUserDeletedListener' => $baseDir . '/lib/private/User/Listeners/BeforeUserDeletedListener.php',
     'OC\\User\\LoginException' => $baseDir . '/lib/private/User/LoginException.php',
     'OC\\User\\Manager' => $baseDir . '/lib/private/User/Manager.php',
     'OC\\User\\NoUserException' => $baseDir . '/lib/private/User/NoUserException.php',

lib/composer/composer/autoload_static.php

@@ -1588,6 +1588,7 @@ class ComposerStaticInit53792487c5a8370acc0b06b1a864ff4c
         'OC\\User\\Database' => __DIR__ . '/../../..' . '/lib/private/User/Database.php',
         'OC\\User\\DisplayNameCache' => __DIR__ . '/../../..' . '/lib/private/User/DisplayNameCache.php',
         'OC\\User\\LazyUser' => __DIR__ . '/../../..' . '/lib/private/User/LazyUser.php',
+		'OC\\User\\Listeners\\BeforeUserDeletedListener' => __DIR__ . '/../../..' . '/lib/private/User/Listeners/BeforeUserDeletedListener.php',
         'OC\\User\\LoginException' => __DIR__ . '/../../..' . '/lib/private/User/LoginException.php',
         'OC\\User\\Manager' => __DIR__ . '/../../..' . '/lib/private/User/Manager.php',
         'OC\\User\\NoUserException' => __DIR__ . '/../../..' . '/lib/private/User/NoUserException.php',

lib/private/Server.php

@@ -151,6 +151,7 @@
 use OC\Tagging\TagMapper;
 use OC\Talk\Broker;
 use OC\Template\JSCombiner;
+use OC\User\Listeners\BeforeUserDeletedListener;
 use OCA\Theming\ImageManager;
 use OCA\Theming\ThemingDefaults;
 use OCA\Theming\Util;
@@ -244,6 +245,7 @@
 use OCP\SystemTag\ISystemTagObjectMapper;
 use OCP\Talk\IBroker;
 use OCP\User\Events\BeforePasswordUpdatedEvent;
+use OCP\User\Events\BeforeUserDeletedEvent;
 use OCP\User\Events\BeforeUserLoggedInEvent;
 use OCP\User\Events\BeforeUserLoggedInWithCookieEvent;
 use OCP\User\Events\BeforeUserLoggedOutEvent;
@@ -1522,6 +1524,7 @@ private function connectDispatcher() {
 		$eventDispatched = $this->get(IEventDispatcher::class);
 		$eventDispatched->addServiceListener(LoginFailed::class, LoginFailedListener::class);
 		$eventDispatched->addServiceListener(PostLoginEvent::class, UserLoggedInListener::class);
+		$eventDispatched->addServiceListener(BeforeUserDeletedEvent::class, BeforeUserDeletedListener::class);
 	}
 
 	/**

lib/private/User/Listeners/BeforeUserDeletedListener.php

@@ -0,0 +1,53 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2022 Carl Schwan <carl@carlschwan.eu>
+ *
+ * @license AGPL-3.0-or-later
+ *
+ * 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\User\Listeners;
+
+use OCP\EventDispatcher\Event;
+use OCP\EventDispatcher\IEventListener;
+use OCP\Security\ICredentialsManager;
+use OCP\User\Events\BeforeUserDeletedEvent;
+use Psr\Log\LoggerInterface;
+
+/**
+ * @template-implements IEventListener<BeforeUserDeletedEvent>
+ */
+class BeforeUserDeletedListener implements IEventListener {
+	private ICredentialsManager $credentialsManager;
+	private LoggerInterface $logger;
+
+	public function __construct(LoggerInterface $logger, ICredentialsManager $credentialsManager) {
+		$this->credentialsManager = $credentialsManager;
+		$this->logger = $logger;
+	}
+
+	public function handle(Event $event): void {
+		if (!($event instanceof BeforeUserDeletedEvent)) {
+			return;
+		}
+
+		$user = $event->getUser();
+		// Delete storages credentials on user deletion
+		$this->credentialsManager->erase($user->getUID());
+	}
+}