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<?php
/**
* @author Christoph Wurst <christoph@owncloud.com>
*
* @copyright Copyright (c) 2016, ownCloud, Inc.
* @license AGPL-3.0
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
namespace OC\Core\Middleware;
use Exception;
use OC\Authentication\Exceptions\TwoFactorAuthRequiredException;
use OC\Authentication\Exceptions\UserAlreadyLoggedInException;
use OC\Authentication\TwoFactorAuth\Manager;
use OC\Core\Controller\TwoFactorChallengeController;
use OC\User\Session;
use OCP\AppFramework\Controller;
use OCP\AppFramework\Http\RedirectResponse;
use OCP\AppFramework\Middleware;
use OCP\AppFramework\Utility\IControllerMethodReflector;
use OCP\ISession;
use OCP\IURLGenerator;
class TwoFactorMiddleware extends Middleware {
/** @var Manager */
private $twoFactorManager;
/** @var Session */
private $userSession;
/** @var ISession */
private $session;
/** @var IURLGenerator */
private $urlGenerator;
/** @var IControllerMethodReflector */
private $reflector;
/**
* @param Manager $twoFactorManager
* @param Session $userSession
* @param ISession $session
* @param IURLGenerator $urlGenerator
*/
public function __construct(Manager $twoFactorManager, Session $userSession, ISession $session,
IURLGenerator $urlGenerator, IControllerMethodReflector $reflector) {
$this->twoFactorManager = $twoFactorManager;
$this->userSession = $userSession;
$this->session = $session;
$this->urlGenerator = $urlGenerator;
$this->reflector = $reflector;
}
/**
* @param Controller $controller
* @param string $methodName
*/
public function beforeController($controller, $methodName) {
if ($this->reflector->hasAnnotation('PublicPage')) {
// Don't block public pages
return;
}
if ($this->userSession->isLoggedIn()) {
$user = $this->userSession->getUser();
if ($this->twoFactorManager->isTwoFactorAuthenticated($user)) {
$this->checkTwoFactor($controller, $methodName);
} else if ($controller instanceof TwoFactorChallengeController) {
// Allow access to the two-factor controllers only if two-factor authentication
// is in progress.
throw new UserAlreadyLoggedInException();
}
}
// TODO: dont check/enforce 2FA if a auth token is used
}
private function checkTwoFactor($controller, $methodName) {
// If two-factor auth is in progress disallow access to any controllers
// defined within "LoginController".
$needsSecondFactor = $this->twoFactorManager->needsSecondFactor();
$twoFactor = $controller instanceof TwoFactorChallengeController;
// Disallow access to any controller if 2FA needs to be checked
if ($needsSecondFactor && !$twoFactor) {
throw new TwoFactorAuthRequiredException();
}
// Allow access to the two-factor controllers only if two-factor authentication
// is in progress.
if (!$needsSecondFactor && $twoFactor) {
throw new UserAlreadyLoggedInException();
}
}
public function afterException($controller, $methodName, Exception $exception) {
if ($exception instanceof TwoFactorAuthRequiredException) {
return new RedirectResponse($this->urlGenerator->linkToRoute('core.TwoFactorChallenge.selectChallenge'));
}
if ($exception instanceof UserAlreadyLoggedInException) {
return new RedirectResponse($this->urlGenerator->linkToRoute('files.view.index'));
}
}
}
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