Properly cleanup entries of WebAuthn on user deletion

Signed-off-by: Morris Jobke <hey@morrisjobke.de>

2 files changed, 63 insertions, 0 deletions

diff --git a/lib/private/Authentication/Listeners/UserDeletedWebAuthnCleanupListener.php b/lib/private/Authentication/Listeners/UserDeletedWebAuthnCleanupListener.php
new file mode 100644
index 00000000000..a56ac3bd54e
--- /dev/null
+++ b/lib/private/Authentication/Listeners/UserDeletedWebAuthnCleanupListener.php
@@ -0,0 +1,50 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2021 Morris Jobke <hey@morrisjobke.de>
+ *
+ * @author Morris Jobke <hey@morrisjobke.de>
+ *
+ * @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\WebAuthn\Db\PublicKeyCredentialMapper;
+use OCP\EventDispatcher\Event;
+use OCP\EventDispatcher\IEventListener;
+use OCP\User\Events\UserDeletedEvent;
+
+class UserDeletedWebAuthnCleanupListener implements IEventListener {
+
+	/** @var PublicKeyCredentialMapper */
+	private $credentialMapper;
+
+	public function __construct(PublicKeyCredentialMapper $credentialMapper) {
+		$this->credentialMapper = $credentialMapper;
+	}
+
+	public function handle(Event $event): void {
+		if (!($event instanceof UserDeletedEvent)) {
+			return;
+		}
+
+		$this->credentialMapper->deleteByUid($event->getUser()->getUID());
+	}
+}
diff --git a/lib/private/Authentication/WebAuthn/Db/PublicKeyCredentialMapper.php b/lib/private/Authentication/WebAuthn/Db/PublicKeyCredentialMapper.php
index 2fbf6fd375d..72c557eb53a 100644
--- a/lib/private/Authentication/WebAuthn/Db/PublicKeyCredentialMapper.php
+++ b/lib/private/Authentication/WebAuthn/Db/PublicKeyCredentialMapper.php
@@ -84,4 +84,17 @@ class PublicKeyCredentialMapper extends QBMapper {
 
 		return $this->findEntity($qb);
 	}
+
+	/**
+	 * @throws \OCP\DB\Exception
+	 */
+	public function deleteByUid(string $uid) {
+		$qb = $this->db->getQueryBuilder();
+
+		$qb->delete($this->getTableName())
+			->where(
+				$qb->expr()->eq('uid', $qb->createNamedParameter($uid))
+			);
+		$qb->executeStatement();
+	}
 }