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<?php |
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/** |
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* Copyright 2016 SURFnet bv |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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namespace Surfnet\StepupSelfService\SelfServiceBundle\Security\Authentication\Handler; |
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use Psr\Log\LoggerInterface; |
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use Surfnet\StepupSelfService\SelfServiceBundle\Security\Authentication\AuthenticatedSessionStateHandler; |
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use Surfnet\StepupSelfService\SelfServiceBundle\Security\Authentication\Session\SessionLifetimeGuard; |
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use Symfony\Component\HttpFoundation\RedirectResponse; |
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use Symfony\Component\HttpKernel\Event\GetResponseEvent; |
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use Symfony\Component\Routing\RouterInterface; |
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use Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface; |
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use Symfony\Component\Security\Http\Logout\CookieClearingLogoutHandler; |
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use Symfony\Component\Security\Http\Logout\SessionLogoutHandler; |
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/** |
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* @SuppressWarnings(PHPMD.CouplingBetweenObjects) |
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*/ |
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class ExplicitSessionTimeoutHandler implements AuthenticationHandler |
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{ |
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/** |
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* @var AuthenticationHandler|null |
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*/ |
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private $nextHandler; |
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/** |
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* @var TokenStorageInterface |
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*/ |
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private $tokenStorage; |
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/** |
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* @var SessionLifetimeGuard |
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*/ |
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private $sessionLifetimeGuard; |
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/** |
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* @var AuthenticatedSessionStateHandler |
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*/ |
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private $authenticatedSession; |
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/** |
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* @var SessionLogoutHandler |
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*/ |
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private $sessionLogoutHandler; |
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/** |
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* @var CookieClearingLogoutHandler |
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*/ |
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private $cookieClearingLogoutHandler; |
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/** |
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* @var RouterInterface |
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*/ |
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private $router; |
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/** |
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* @var LoggerInterface |
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*/ |
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private $logger; |
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public function __construct( |
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TokenStorageInterface $tokenStorageInterface, |
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AuthenticatedSessionStateHandler $authenticatedSessionStateHandler, |
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SessionLifetimeGuard $sessionLifetimeGuard, |
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SessionLogoutHandler $sessionLogoutHandler, |
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CookieClearingLogoutHandler $cookieClearingLogoutHandler, |
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RouterInterface $router, |
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LoggerInterface $logger |
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) { |
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$this->tokenStorage = $tokenStorageInterface; |
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$this->authenticatedSession = $authenticatedSessionStateHandler; |
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$this->sessionLifetimeGuard = $sessionLifetimeGuard; |
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$this->sessionLogoutHandler = $sessionLogoutHandler; |
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$this->cookieClearingLogoutHandler = $cookieClearingLogoutHandler; |
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$this->router = $router; |
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$this->logger = $logger; |
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} |
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public function process(GetResponseEvent $event) |
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{ |
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if ($this->tokenStorage->getToken() !== null |
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&& !$this->sessionLifetimeGuard->sessionLifetimeWithinLimits($this->authenticatedSession) |
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) { |
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$invalidatedBy = []; |
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if (!$this->sessionLifetimeGuard->sessionLifetimeWithinAbsoluteLimit($this->authenticatedSession)) { |
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$invalidatedBy[] = 'absolute'; |
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} |
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if (!$this->sessionLifetimeGuard->sessionLifetimeWithinRelativeLimit($this->authenticatedSession)) { |
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$invalidatedBy[] = 'relative'; |
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} |
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$this->logger->notice(sprintf( |
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'Authenticated user found, but session was determined to be outside of the "%s" time limit. User will ' |
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. 'be logged out and redirected to session-expired page to attempt new login.', |
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implode(' and ', $invalidatedBy) |
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)); |
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$token = $this->tokenStorage->getToken(); |
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$request = $event->getRequest(); |
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// if the current request was not a GET request we cannot safely redirect to that page after login as it |
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// may require a form resubmit for instance. Therefor, we redirect to the last GET request (either current |
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// or previous). |
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$afterLoginRedirectTo = $this->authenticatedSession->getCurrentRequestUri(); |
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if ($event->getRequest()->getMethod() === 'GET') { |
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$afterLoginRedirectTo = $event->getRequest()->getRequestUri(); |
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} |
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// log the user out using Symfony methodology, see the LogoutListener |
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$event->setResponse(new RedirectResponse($this->router->generate('selfservice_security_session_expired'))); |
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$this->sessionLogoutHandler->logout($request, $event->getResponse(), $token); |
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$this->cookieClearingLogoutHandler->logout($request, $event->getResponse(), $token); |
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$this->tokenStorage->setToken(null); |
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// the session is restarted after invalidation during the logout, so we can (re)store the last GET request |
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$this->authenticatedSession->setCurrentRequestUri($afterLoginRedirectTo); |
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return; |
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} |
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if ($this->nextHandler !== null) { |
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$this->nextHandler->process($event); |
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} |
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} |
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public function setNext(AuthenticationHandler $handler) |
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{ |
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$this->nextHandler = $handler; |
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} |
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} |
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Unless you are absolutely sure that the expression can never be null because of other conditions, we strongly recommend to add an additional type check to your code: