277 lines
9.7 KiB
PHP
277 lines
9.7 KiB
PHP
<?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 <dev@bernhard-posselt.com>
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* @author Joas Schilling <coding@schilljs.com>
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* @author Lukas Reschke <lukas@statuscode.ch>
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* @author Morris Jobke <hey@morrisjobke.de>
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* @author Roeland Jago Douma <roeland@famdouma.nl>
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* @author Stefan Weil <sw@weilnetz.de>
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* @author Thomas Müller <thomas.mueller@tmit.eu>
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* @author Thomas Tanghus <thomas@tanghus.net>
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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\AppNotEnabledException;
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use OC\AppFramework\Middleware\Security\Exceptions\CrossSiteRequestForgeryException;
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use OC\AppFramework\Middleware\Security\Exceptions\NotAdminException;
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use OC\AppFramework\Middleware\Security\Exceptions\NotLoggedInException;
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use OC\AppFramework\Middleware\Security\Exceptions\StrictCookieMissingException;
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use OC\AppFramework\Utility\ControllerMethodReflector;
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use OC\Security\CSP\ContentSecurityPolicyManager;
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use OC\Security\CSP\ContentSecurityPolicyNonceManager;
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use OC\Security\CSRF\CsrfTokenManager;
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use OCP\App\IAppManager;
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use OCP\AppFramework\Http\ContentSecurityPolicy;
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use OCP\AppFramework\Http\EmptyContentSecurityPolicy;
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use OCP\AppFramework\Http\RedirectResponse;
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use OCP\AppFramework\Http\TemplateResponse;
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use OCP\AppFramework\Middleware;
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use OCP\AppFramework\Http\Response;
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use OCP\AppFramework\Http\JSONResponse;
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use OCP\AppFramework\OCSController;
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use OCP\IL10N;
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use OCP\INavigationManager;
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use OCP\IURLGenerator;
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use OCP\IRequest;
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use OCP\ILogger;
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use OCP\AppFramework\Controller;
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use OCP\Util;
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use OC\AppFramework\Middleware\Security\Exceptions\SecurityException;
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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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/** @var INavigationManager */
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private $navigationManager;
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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 string */
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private $appName;
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/** @var IURLGenerator */
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private $urlGenerator;
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/** @var ILogger */
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private $logger;
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/** @var bool */
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private $isLoggedIn;
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/** @var bool */
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private $isAdminUser;
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/** @var ContentSecurityPolicyManager */
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private $contentSecurityPolicyManager;
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/** @var CsrfTokenManager */
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private $csrfTokenManager;
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/** @var ContentSecurityPolicyNonceManager */
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private $cspNonceManager;
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/** @var IAppManager */
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private $appManager;
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/** @var IL10N */
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private $l10n;
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/**
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* @param IRequest $request
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* @param ControllerMethodReflector $reflector
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* @param INavigationManager $navigationManager
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* @param IURLGenerator $urlGenerator
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* @param ILogger $logger
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* @param string $appName
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* @param bool $isLoggedIn
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* @param bool $isAdminUser
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* @param ContentSecurityPolicyManager $contentSecurityPolicyManager
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* @param CSRFTokenManager $csrfTokenManager
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* @param ContentSecurityPolicyNonceManager $cspNonceManager
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* @param IAppManager $appManager
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* @param IL10N $l10n
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*/
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public function __construct(IRequest $request,
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ControllerMethodReflector $reflector,
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INavigationManager $navigationManager,
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IURLGenerator $urlGenerator,
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ILogger $logger,
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$appName,
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$isLoggedIn,
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$isAdminUser,
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ContentSecurityPolicyManager $contentSecurityPolicyManager,
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CsrfTokenManager $csrfTokenManager,
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ContentSecurityPolicyNonceManager $cspNonceManager,
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IAppManager $appManager,
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IL10N $l10n
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) {
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$this->navigationManager = $navigationManager;
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$this->request = $request;
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$this->reflector = $reflector;
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$this->appName = $appName;
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$this->urlGenerator = $urlGenerator;
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$this->logger = $logger;
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$this->isLoggedIn = $isLoggedIn;
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$this->isAdminUser = $isAdminUser;
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$this->contentSecurityPolicyManager = $contentSecurityPolicyManager;
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$this->csrfTokenManager = $csrfTokenManager;
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$this->cspNonceManager = $cspNonceManager;
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$this->appManager = $appManager;
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$this->l10n = $l10n;
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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 Controller $controller the controller
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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, $methodName) {
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// this will set the current navigation entry of the app, use this only
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// for normal HTML requests and not for AJAX requests
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$this->navigationManager->setActiveEntry($this->appName);
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// security checks
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$isPublicPage = $this->reflector->hasAnnotation('PublicPage');
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if(!$isPublicPage) {
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if(!$this->isLoggedIn) {
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throw new NotLoggedInException();
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}
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if(!$this->reflector->hasAnnotation('NoAdminRequired')) {
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if(!$this->isAdminUser) {
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throw new NotAdminException($this->l10n->t('Logged in user must be an admin'));
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}
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}
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}
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// Check for strict cookie requirement
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if($this->reflector->hasAnnotation('StrictCookieRequired') || !$this->reflector->hasAnnotation('NoCSRFRequired')) {
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if(!$this->request->passesStrictCookieCheck()) {
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throw new StrictCookieMissingException();
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}
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}
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// CSRF check - also registers the CSRF token since the session may be closed later
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Util::callRegister();
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if(!$this->reflector->hasAnnotation('NoCSRFRequired')) {
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/*
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* Only allow the CSRF check to fail on OCS Requests. This kind of
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* hacks around that we have no full token auth in place yet and we
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* do want to offer CSRF checks for web requests.
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*
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* Additionally we allow Bearer authenticated requests to pass on OCS routes.
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* This allows oauth apps (e.g. moodle) to use the OCS endpoints
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*/
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if(!$this->request->passesCSRFCheck() && !(
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$controller instanceof OCSController && (
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$this->request->getHeader('OCS-APIREQUEST') === 'true' ||
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strpos($this->request->getHeader('Authorization'), 'Bearer ') === 0
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)
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)) {
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throw new CrossSiteRequestForgeryException();
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}
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}
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/**
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* FIXME: Use DI once available
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* Checks if app is enabled (also includes a check whether user is allowed to access the resource)
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* The getAppPath() check is here since components such as settings also use the AppFramework and
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* therefore won't pass this check.
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*/
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if(\OC_App::getAppPath($this->appName) !== false && !$this->appManager->isEnabledForUser($this->appName)) {
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throw new AppNotEnabledException();
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}
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}
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/**
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* Performs the default CSP modifications that may be injected by other
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* applications
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*
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* @param Controller $controller
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* @param string $methodName
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* @param Response $response
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* @return Response
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*/
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public function afterController($controller, $methodName, Response $response) {
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$policy = !is_null($response->getContentSecurityPolicy()) ? $response->getContentSecurityPolicy() : new ContentSecurityPolicy();
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if (get_class($policy) === EmptyContentSecurityPolicy::class) {
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return $response;
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}
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$defaultPolicy = $this->contentSecurityPolicyManager->getDefaultPolicy();
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$defaultPolicy = $this->contentSecurityPolicyManager->mergePolicies($defaultPolicy, $policy);
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if($this->cspNonceManager->browserSupportsCspV3()) {
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$defaultPolicy->useJsNonce($this->csrfTokenManager->getToken()->getEncryptedValue());
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}
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$response->setContentSecurityPolicy($defaultPolicy);
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return $response;
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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 $exception the thrown exception
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* @throws \Exception the passed in exception if it can't handle it
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* @return Response a Response object or null in case that the exception could not be handled
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*/
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public function afterException($controller, $methodName, \Exception $exception) {
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if($exception instanceof SecurityException) {
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if($exception instanceof StrictCookieMissingException) {
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return new RedirectResponse(\OC::$WEBROOT);
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}
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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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} else {
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if($exception instanceof NotLoggedInException) {
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$params = [];
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if (isset($this->request->server['REQUEST_URI'])) {
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$params['redirect_url'] = $this->request->server['REQUEST_URI'];
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}
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$url = $this->urlGenerator->linkToRoute('core.login.showLoginForm', $params);
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$response = new RedirectResponse($url);
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} else {
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$response = new TemplateResponse('core', '403', ['file' => $exception->getMessage()], 'guest');
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$response->setStatus($exception->getCode());
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}
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}
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$this->logger->logException($exception, [
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'level' => \OCP\Util::DEBUG,
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'app' => 'core',
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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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