Add two factor auth to core

1 files changed, 117 insertions, 0 deletions

diff --git a/core/Middleware/TwoFactorMiddleware.php b/core/Middleware/TwoFactorMiddleware.php
new file mode 100644
index 00000000000..ea25aa36ecd
--- /dev/null
+++ b/core/Middleware/TwoFactorMiddleware.php
@@ -0,0 +1,117 @@
+<?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, $methodName);
+			}
+		}
+		// TODO: dont check/enforce 2FA if a auth token is used
+	}
+
+	private function checkTwoFactor($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'));
+		}
+	}
+
+}