Write to event log, when a user gets impersonated

src/Entity/LogSystem/SecurityEventLogEntry.php

@@ -64,6 +64,7 @@ class SecurityEventLogEntry extends AbstractLogEntry
         6 => SecurityEvents::GOOGLE_DISABLED,
         7 => SecurityEvents::TRUSTED_DEVICE_RESET,
         8 => SecurityEvents::TFA_ADMIN_RESET,
+        9 => SecurityEvents::USER_IMPERSONATED,
     ];
 
     public function __construct(string $type, string $ip_address, bool $anonymize = true)

src/EventSubscriber/LogSystem/SecurityEventLoggerSubscriber.php

@@ -48,6 +48,7 @@ use App\Events\SecurityEvents;
 use App\Services\LogSystem\EventLogger;
 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
 use Symfony\Component\HttpFoundation\RequestStack;
+use Symfony\Component\Security\Http\Event\SwitchUserEvent;
 
 /**
  * This subscriber writes entries to log if a security related event happens (e.g. the user changes its password).
@@ -70,6 +71,7 @@ final class SecurityEventLoggerSubscriber implements EventSubscriberInterface
             SecurityEvents::GOOGLE_DISABLED => 'google_disabled',
             SecurityEvents::GOOGLE_ENABLED => 'google_enabled',
             SecurityEvents::TFA_ADMIN_RESET => 'tfa_admin_reset',
+            SecurityEvents::USER_IMPERSONATED => 'user_impersonated',
         ];
     }
 
@@ -103,6 +105,11 @@ final class SecurityEventLoggerSubscriber implements EventSubscriberInterface
         $this->addLog(SecurityEvents::U2F_REMOVED, $event);
     }
 
+    public function user_impersonated(SecurityEvent $event): void
+    {
+        $this->addLog(SecurityEvents::USER_IMPERSONATED, $event);
+    }
+
     public function u2f_added(SecurityEvent $event): void
     {
         $this->addLog(SecurityEvents::U2F_ADDED, $event);

src/EventSubscriber/SwitchUserEventSubscriber.php

@@ -0,0 +1,64 @@
+<?php
+/*
+ * This file is part of Part-DB (https://github.com/Part-DB/Part-DB-symfony).
+ *
+ *  Copyright (C) 2019 - 2023 Jan Böhmer (https://github.com/jbtronics)
+ *
+ *  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 <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+
+namespace App\EventSubscriber;
+
+use App\Entity\UserSystem\User;
+use App\Events\SecurityEvent;
+use App\Events\SecurityEvents;
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+use Symfony\Component\Security\Core\Authentication\Token\SwitchUserToken;
+use Symfony\Component\Security\Http\Event\SwitchUserEvent;
+use Symfony\Contracts\EventDispatcher\EventDispatcherInterface;
+
+class SwitchUserEventSubscriber implements EventSubscriberInterface
+{
+
+    public function __construct(private readonly EventDispatcherInterface $eventDispatcher)
+    {
+    }
+
+    public static function getSubscribedEvents()
+    {
+        return [
+            'security.switch_user' => 'onSwitchUser',
+        ];
+    }
+
+    public function onSwitchUser(SwitchUserEvent $event): void
+    {
+        $target_user = $event->getTargetUser();
+        // We can only handle User objects
+        if (!$target_user instanceof User) {
+            return;
+        }
+
+        //We are only interested in impersonation (not unimpersonation)
+        if (!$event->getToken() instanceof SwitchUserToken) {
+            return;
+        }
+
+        $security_event = new SecurityEvent($target_user);
+        $this->eventDispatcher->dispatch($security_event, SecurityEvents::USER_IMPERSONATED);
+    }
+}

src/Events/SecurityEvents.php

@@ -52,4 +52,6 @@ class SecurityEvents
     final public const GOOGLE_DISABLED = 'security.google_disabled';
     final public const TRUSTED_DEVICE_RESET = 'security.trusted_device_reset';
     final public const TFA_ADMIN_RESET = 'security.2fa_admin_reset';
+
+    final public const USER_IMPERSONATED = 'security.user_impersonated';
 }

translations/messages.en.xlf

@@ -11429,5 +11429,11 @@ Element 3</target>
 Please note, that you can not impersonate a disabled user. If you try you will get an "Access Denied" message.</target>
       </segment>
     </unit>
+    <unit id="df2ac87" name="log.type.security.user_impersonated">
+      <segment>
+        <source>log.type.security.user_impersonated</source>
+        <target>User impersonated</target>
+      </segment>
+    </unit>
   </file>
 </xliff>