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<?php
/**
* @copyright 2017, Roeland Jago Douma <roeland@famdouma.nl>
*
* @author Roeland Jago Douma <roeland@famdouma.nl>
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* 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
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
namespace OC\AppFramework\Middleware\Security;
use OC\AppFramework\Http\Request;
use OC\AppFramework\Middleware\Security\Exceptions\LaxSameSiteCookieFailedException;
use OC\AppFramework\Utility\ControllerMethodReflector;
use OCP\AppFramework\Http;
use OCP\AppFramework\Http\Response;
use OCP\AppFramework\Middleware;
class SameSiteCookieMiddleware extends Middleware {
/** @var Request */
private $request;
/** @var ControllerMethodReflector */
private $reflector;
public function __construct(Request $request,
ControllerMethodReflector $reflector) {
$this->request = $request;
$this->reflector = $reflector;
}
public function beforeController($controller, $methodName) {
$requestUri = $this->request->getScriptName();
$processingScript = explode('/', $requestUri);
$processingScript = $processingScript[count($processingScript)-1];
if ($processingScript !== 'index.php') {
return;
}
$noSSC = $this->reflector->hasAnnotation('NoSameSiteCookieRequired');
if ($noSSC) {
return;
}
if (!$this->request->passesLaxCookieCheck()) {
throw new LaxSameSiteCookieFailedException();
}
}
public function afterException($controller, $methodName, \Exception $exception) {
if ($exception instanceof LaxSameSiteCookieFailedException) {
$respone = new Response();
$respone->setStatus(Http::STATUS_FOUND);
$respone->addHeader('Location', $this->request->getRequestUri());
$this->setSameSiteCookie();
return $respone;
}
throw $exception;
}
protected function setSameSiteCookie() {
$cookieParams = $this->request->getCookieParams();
$secureCookie = ($cookieParams['secure'] === true) ? 'secure; ' : '';
$policies = [
'lax',
'strict',
];
// Append __Host to the cookie if it meets the requirements
$cookiePrefix = '';
if ($cookieParams['secure'] === true && $cookieParams['path'] === '/') {
$cookiePrefix = '__Host-';
}
foreach ($policies as $policy) {
header(
sprintf(
'Set-Cookie: %snc_sameSiteCookie%s=true; path=%s; httponly;' . $secureCookie . 'expires=Fri, 31-Dec-2100 23:59:59 GMT; SameSite=%s',
$cookiePrefix,
$policy,
$cookieParams['path'],
$policy
),
false
);
}
}
}
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