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<?php |
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/** |
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* @copyright Copyright (c) 2016, ownCloud, Inc. |
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* |
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* @author Bernhard Posselt <[email protected]> |
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* @author Christoph Wurst <[email protected]> |
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* @author Lukas Reschke <[email protected]> |
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* @author Morris Jobke <[email protected]> |
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* @author Stefan Weil <[email protected]> |
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* |
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* @license AGPL-3.0 |
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* |
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* This code is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU Affero General Public License, version 3, |
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* as published by the Free Software Foundation. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU Affero General Public License for more details. |
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* |
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* You should have received a copy of the GNU Affero General Public License, version 3, |
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* along with this program. If not, see <http://www.gnu.org/licenses/> |
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* |
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*/ |
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namespace OC\AppFramework\Middleware\Security; |
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use OC\AppFramework\Middleware\Security\Exceptions\SecurityException; |
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use OC\AppFramework\Utility\ControllerMethodReflector; |
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use OC\Authentication\Exceptions\PasswordLoginForbiddenException; |
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use OC\Security\Bruteforce\Throttler; |
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use OC\User\Session; |
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use OCP\AppFramework\Controller; |
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use OCP\AppFramework\Http; |
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use OCP\AppFramework\Http\JSONResponse; |
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use OCP\AppFramework\Http\Response; |
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use OCP\AppFramework\Middleware; |
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use OCP\IRequest; |
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/** |
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* This middleware sets the correct CORS headers on a response if the |
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* controller has the @CORS annotation. This is needed for webapps that want |
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* to access an API and don't run on the same domain, see |
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* https://developer.mozilla.org/en-US/docs/Web/HTTP/Access_control_CORS |
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*/ |
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class CORSMiddleware extends Middleware { |
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/** @var IRequest */ |
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private $request; |
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/** @var ControllerMethodReflector */ |
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private $reflector; |
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/** @var Session */ |
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private $session; |
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/** @var Throttler */ |
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private $throttler; |
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/** |
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* @param IRequest $request |
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* @param ControllerMethodReflector $reflector |
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* @param Session $session |
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* @param Throttler $throttler |
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*/ |
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public function __construct(IRequest $request, |
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ControllerMethodReflector $reflector, |
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Session $session, |
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Throttler $throttler) { |
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$this->request = $request; |
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$this->reflector = $reflector; |
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$this->session = $session; |
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$this->throttler = $throttler; |
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} |
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/** |
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* This is being run in normal order before the controller is being |
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* called which allows several modifications and checks |
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* |
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* @param Controller $controller the controller that is being called |
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* @param string $methodName the name of the method that will be called on |
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* the controller |
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* @throws SecurityException |
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* @since 6.0.0 |
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*/ |
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public function beforeController($controller, $methodName) { |
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// ensure that @CORS annotated API routes are not used in conjunction |
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// with session authentication since this enables CSRF attack vectors |
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if ($this->reflector->hasAnnotation('CORS') && !$this->reflector->hasAnnotation('PublicPage')) { |
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$user = array_key_exists('PHP_AUTH_USER', $this->request->server) ? $this->request->server['PHP_AUTH_USER'] : null; |
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$pass = array_key_exists('PHP_AUTH_PW', $this->request->server) ? $this->request->server['PHP_AUTH_PW'] : null; |
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$this->session->logout(); |
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try { |
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if ($user === null || $pass === null || !$this->session->logClientIn($user, $pass, $this->request, $this->throttler)) { |
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throw new SecurityException('CORS requires basic auth', Http::STATUS_UNAUTHORIZED); |
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} |
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} catch (PasswordLoginForbiddenException $ex) { |
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throw new SecurityException('Password login forbidden, use token instead', Http::STATUS_UNAUTHORIZED); |
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} |
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} |
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} |
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/** |
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* This is being run after a successful controllermethod call and allows |
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* the manipulation of a Response object. The middleware is run in reverse order |
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* |
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* @param Controller $controller the controller that is being called |
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* @param string $methodName the name of the method that will be called on |
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* the controller |
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* @param Response $response the generated response from the controller |
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* @return Response a Response object |
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* @throws SecurityException |
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*/ |
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public function afterController($controller, $methodName, Response $response) { |
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// only react if its a CORS request and if the request sends origin and |
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if (isset($this->request->server['HTTP_ORIGIN']) && |
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$this->reflector->hasAnnotation('CORS')) { |
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// allow credentials headers must not be true or CSRF is possible |
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// otherwise |
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foreach ($response->getHeaders() as $header => $value) { |
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if (strtolower($header) === 'access-control-allow-credentials' && |
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strtolower(trim($value)) === 'true') { |
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$msg = 'Access-Control-Allow-Credentials must not be '. |
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'set to true in order to prevent CSRF'; |
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throw new SecurityException($msg); |
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} |
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} |
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$origin = $this->request->server['HTTP_ORIGIN']; |
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$response->addHeader('Access-Control-Allow-Origin', $origin); |
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} |
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return $response; |
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} |
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/** |
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* If an SecurityException is being caught return a JSON error response |
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* |
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* @param Controller $controller the controller that is being called |
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* @param string $methodName the name of the method that will be called on |
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* the controller |
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* @param \Exception $exception the thrown exception |
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* @throws \Exception the passed in exception if it can't handle it |
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* @return Response a Response object or null in case that the exception could not be handled |
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*/ |
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public function afterException($controller, $methodName, \Exception $exception) { |
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if ($exception instanceof SecurityException) { |
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$response = new JSONResponse(['message' => $exception->getMessage()]); |
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if ($exception->getCode() !== 0) { |
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$response->setStatus($exception->getCode()); |
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} else { |
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$response->setStatus(Http::STATUS_INTERNAL_SERVER_ERROR); |
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} |
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return $response; |
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} |
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throw $exception; |
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} |
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} |
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nextcloud /
server
