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<?php |
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/* |
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* This file is part of EC-CUBE |
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* |
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* Copyright(c) EC-CUBE CO.,LTD. All Rights Reserved. |
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* |
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* http://www.ec-cube.co.jp/ |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Eccube\EventListener; |
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use Eccube\Entity\Member; |
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use Eccube\Request\Context; |
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use Eccube\Service\SystemService; |
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use Symfony\Component\EventDispatcher\EventSubscriberInterface; |
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use Symfony\Component\HttpFoundation\Request; |
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use Symfony\Component\HttpFoundation\Response; |
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use Symfony\Component\HttpKernel\Event\GetResponseEvent; |
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use Symfony\Component\HttpKernel\KernelEvents; |
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use Symfony\Component\Security\Core\Authentication\Token\TokenInterface; |
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final class MaintenanceListener implements EventSubscriberInterface |
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{ |
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private const SESSION_KEY = '_security_admin'; |
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/** @var Context */ |
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private $context; |
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/** @var SystemService */ |
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private $systemService; |
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public function __construct(Context $context, SystemService $systemService) |
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{ |
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$this->context = $context; |
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$this->systemService = $systemService; |
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} |
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public static function getSubscribedEvents() |
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{ |
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return [ |
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KernelEvents::REQUEST => 'onRequest', |
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]; |
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} |
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public function onRequest(GetResponseEvent $event) |
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{ |
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if (!$event->isMasterRequest()) { |
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return; |
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} |
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if ($this->context->isAdmin() || !$this->systemService->isMaintenanceMode()) { |
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return; |
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} |
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$request = $event->getRequest(); |
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if ($this->isAdminAuthenticated($request)) { |
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return; |
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} |
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$locale = \env('ECCUBE_LOCALE'); |
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$templateCode = \env('ECCUBE_TEMPLATE_CODE'); |
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$baseUrl = htmlspecialchars(\rawurldecode($request->getBaseUrl()), ENT_QUOTES); |
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\ob_start(); |
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require __DIR__ . '/../../../maintenance.php'; |
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$response = new Response(\ob_get_clean(), 503); |
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$event->setResponse($response); |
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} |
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private function isAdminAuthenticated(Request $request): bool |
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{ |
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$session = $request->hasPreviousSession() ? $request->getSession() : null; |
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if ($session === null || ($serializedToken = $session->get(self::SESSION_KEY)) === null) { |
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return false; |
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} |
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$unserializedToken = $this->safelyUnserialize($serializedToken); |
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$user = ($unserializedToken instanceof TokenInterface) |
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? $unserializedToken->getUser() |
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: null; |
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return $user instanceof Member; |
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} |
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private function safelyUnserialize($serializedToken) |
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{ |
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$e = $token = null; |
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$prevUnserializeHandler = \ini_set('unserialize_callback_func', __CLASS__ . '::handleUnserializeCallback'); |
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$prevErrorHandler = \set_error_handler(function ($type, $msg, $file, $line, $context = []) use (&$prevErrorHandler) { |
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if (__FILE__ === $file) { |
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throw new \UnexpectedValueException($msg, 0x37313bc); |
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} |
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return $prevErrorHandler ? $prevErrorHandler($type, $msg, $file, $line, $context) : false; |
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}); |
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try { |
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$token = \unserialize($serializedToken); |
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} catch (\Error $e) { |
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} catch (\Exception $e) { |
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} |
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\restore_error_handler(); |
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\ini_set('unserialize_callback_func', $prevUnserializeHandler); |
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if ($e) { |
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if (!$e instanceof \UnexpectedValueException || 0x37313bc !== $e->getCode()) { |
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throw $e; |
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} |
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} |
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return $token; |
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} |
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/** |
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* @internal |
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*/ |
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public static function handleUnserializeCallback($class) |
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{ |
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throw new \UnexpectedValueException('Class not found: ' . $class, 0x37313bc); |
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} |
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} |
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This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently.
Both the
$myVar
assignment in line 1 and the$higher
assignment in line 2 are dead. The first because$myVar
is never used and the second because$higher
is always overwritten for every possible time line.