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<?php /** * @copyright Copyright (c) 2016 Lukas Reschke <lukas@statuscode.ch> * * @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 { /** @var CsrfTokenManager */ private $csrfTokenManager; /** @var IRequest */ private $request; /** @var string */ private $nonce = ''; /** * @param CsrfTokenManager $csrfTokenManager * @param IRequest $request */ public function __construct(CsrfTokenManager $csrfTokenManager, IRequest $request) { $this->csrfTokenManager = $csrfTokenManager; $this->request = $request; } /** * Returns the current CSP nounce * * @return string */ public function getNonce() { if($this->nonce === '') { $this->nonce = base64_encode($this->csrfTokenManager->getToken()->getEncryptedValue()); } return $this->nonce; } /** * Check if the browser supports CSP v3 * * @return bool */ public function browserSupportsCspV3() { $browserWhitelist = [ Request::USER_AGENT_CHROME, // Firefox 45+ '/^Mozilla\/5\.0 \([^)]+\) Gecko\/[0-9.]+ Firefox\/(4[5-9]|[5-9][0-9])\.[0-9.]+$/', ]; if($this->request->isUserAgent($browserWhitelist)) { return true; } return false; } }
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