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