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<?php
/**
* ownCloud - App Framework
*
* @author Bernhard Posselt
* @copyright 2012 Bernhard Posselt nukeawhale@gmail.com
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
* License as published by the Free Software Foundation; either
* version 3 of the License, or any later version.
*
* This library 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 along with this library. If not, see <http://www.gnu.org/licenses/>.
*
*/
namespace OC\AppFramework\Middleware\Security;
use OC\AppFramework\Http;
use OC\AppFramework\Http\RedirectResponse;
use OC\AppFramework\Utility\MethodAnnotationReader;
use OCP\AppFramework\Middleware;
use OCP\AppFramework\Http\Response;
use OCP\AppFramework\Http\JSONResponse;
use OCP\AppFramework\IAppContainer;
use OCP\IRequest;
/**
* Used to do all the authentication and checking stuff for a controller method
* It reads out the annotations of a controller method and checks which if
* security things should be checked and also handles errors in case a security
* check fails
*/
class SecurityMiddleware extends Middleware {
/**
* @var \OCP\AppFramework\IAppContainer
*/
private $app;
/**
* @var \OCP\IRequest
*/
private $request;
/**
* @param IAppContainer $app
* @param IRequest $request
*/
public function __construct(IAppContainer $app, IRequest $request){
$this->app = $app;
$this->request = $request;
}
/**
* This runs all the security checks before a method call. The
* security checks are determined by inspecting the controller method
* annotations
* @param string/Controller $controller the controllername or string
* @param string $methodName the name of the method
* @throws SecurityException when a security check fails
*/
public function beforeController($controller, $methodName){
// get annotations from comments
$annotationReader = new MethodAnnotationReader($controller, $methodName);
// this will set the current navigation entry of the app, use this only
// for normal HTML requests and not for AJAX requests
$this->app->getServer()->getNavigationManager()->setActiveEntry($this->app->getAppName());
// security checks
$isPublicPage = $annotationReader->hasAnnotation('PublicPage');
if(!$isPublicPage) {
if(!$this->app->isLoggedIn()) {
throw new SecurityException('Current user is not logged in', Http::STATUS_UNAUTHORIZED);
}
if(!$annotationReader->hasAnnotation('NoAdminRequired')) {
if(!$this->app->isAdminUser()) {
throw new SecurityException('Logged in user must be an admin', Http::STATUS_FORBIDDEN);
}
}
}
if(!$annotationReader->hasAnnotation('NoCSRFRequired')) {
if(!$this->request->passesCSRFCheck()) {
throw new SecurityException('CSRF check failed', Http::STATUS_PRECONDITION_FAILED);
}
}
}
/**
* If an SecurityException is being caught, ajax requests return a JSON error
* response and non ajax requests redirect to the index
* @param Controller $controller the controller that is being called
* @param string $methodName the name of the method that will be called on
* the controller
* @param \Exception $exception the thrown exception
* @throws \Exception the passed in exception if it cant handle it
* @return Response a Response object or null in case that the exception could not be handled
*/
public function afterException($controller, $methodName, \Exception $exception){
if($exception instanceof SecurityException){
if (stripos($this->request->getHeader('Accept'),'html')===false) {
$response = new JSONResponse(
array('message' => $exception->getMessage()),
$exception->getCode()
);
$this->app->log($exception->getMessage(), 'debug');
} else {
// TODO: replace with link to route
$url = $this->app->getServer()->getURLGenerator()->getAbsoluteURL('index.php');
$response = new RedirectResponse($url);
$this->app->log($exception->getMessage(), 'debug');
}
return $response;
}
throw $exception;
}
}
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