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<?php /** * Copyright 2017 Facebook, Inc. * * You are hereby granted a non-exclusive, worldwide, royalty-free license to * use, copy, modify, and distribute this software in source code or binary * form for use in connection with the web services and APIs provided by * Facebook. * * As with any software that integrates with the Facebook platform, your use * of this software is subject to the Facebook Developer Principles and * Policies [http://developers.facebook.com/policy/]. This copyright notice * shall be included in all copies or substantial portions of the software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. * */ /** * @copyright (C) 2013 iJoomla, Inc. - All rights reserved. * @license GNU General Public License, version 2 (http://www.gnu.org/licenses/gpl-2.0.html) * @author iJoomla.com <webmaster@ijoomla.com> * @url https://www.jomsocial.com/license-agreement * The PHP code portions are distributed under the GPL license. If not otherwise stated, all images, manuals, cascading style sheets, and included JavaScript *are NOT GPL, and are released under the IJOOMLA Proprietary Use License v1.0 * More info at https://www.jomsocial.com/license-agreement */ namespace Facebook\PseudoRandomString; use Facebook\Exceptions\FacebookSDKException; defined('_JEXEC') or die('Restricted access'); class McryptPseudoRandomStringGenerator implements PseudoRandomStringGeneratorInterface { use PseudoRandomStringGeneratorTrait; /** * @const string The error message when generating the string fails. */ const ERROR_MESSAGE = 'Unable to generate a cryptographically secure pseudo-random string from mcrypt_create_iv(). '; /** * @throws FacebookSDKException */ public function __construct() { if (!function_exists('mcrypt_create_iv')) { throw new FacebookSDKException( static::ERROR_MESSAGE . 'The function mcrypt_create_iv() does not exist.' ); } } /** * @inheritdoc */ public function getPseudoRandomString($length) { $this->validateLength($length); $binaryString = mcrypt_create_iv($length, MCRYPT_DEV_URANDOM); if ($binaryString === false) { throw new FacebookSDKException( static::ERROR_MESSAGE . 'mcrypt_create_iv() returned an error.' ); } return $this->binToHex($binaryString, $length); } }
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