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<?php
declare(strict_types=1);
/**
* @copyright Copyright (c) 2016 Lukas Reschke <lukas@statuscode.ch>
*
* @author Christoph Wurst <christoph@winzerhof-wurst.at>
* @author Joas Schilling <coding@schilljs.com>
* @author Lukas Reschke <lukas@statuscode.ch>
* @author Pavel Krasikov <klonishe@gmail.com>
* @author Roeland Jago Douma <roeland@famdouma.nl>
* @author Sam Bull <aa6bs0@sambull.org>
*
* @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\Security\CSP;
use OC\AppFramework\Http\Request;
use OC\Security\CSRF\CsrfTokenManager;
use OCP\IRequest;
/**
* @package OC\Security\CSP
*/
class ContentSecurityPolicyNonceManager {
private string $nonce = '';
public function __construct(
private CsrfTokenManager $csrfTokenManager,
private IRequest $request,
) {
}
/**
* Returns the current CSP nonce
*/
public function getNonce(): string {
if ($this->nonce === '') {
if (empty($this->request->server['CSP_NONCE'])) {
$this->nonce = base64_encode($this->csrfTokenManager->getToken()->getEncryptedValue());
} else {
$this->nonce = $this->request->server['CSP_NONCE'];
}
}
return $this->nonce;
}
/**
* Check if the browser supports CSP v3
*/
public function browserSupportsCspV3(): bool {
$browserWhitelist = [
Request::USER_AGENT_CHROME,
Request::USER_AGENT_FIREFOX,
Request::USER_AGENT_SAFARI,
Request::USER_AGENT_MS_EDGE,
];
if ($this->request->isUserAgent($browserWhitelist)) {
return true;
}
return false;
}
}
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