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<?php /** * CodeIgniter * * An open source application development framework for PHP * * This content is released under the MIT License (MIT) * * Copyright (c) 2014 - 2019, British Columbia Institute of Technology * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission 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. * * @package CodeIgniter * @author EllisLab Dev Team * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/) * @copyright Copyright (c) 2014 - 2019, British Columbia Institute of Technology (https://bcit.ca/) * @license https://opensource.org/licenses/MIT MIT License * @link https://codeigniter.com * @since Version 3.0.0 * @filesource */ defined('BASEPATH') OR exit('No direct script access allowed'); /** * PHP ext/standard/password compatibility package * * @package CodeIgniter * @subpackage CodeIgniter * @category Compatibility * @author Andrey Andreev * @link https://codeigniter.com/user_guide/ * @link http://php.net/password */ // ------------------------------------------------------------------------ if (is_php('5.5') OR ! defined('CRYPT_BLOWFISH') OR CRYPT_BLOWFISH !== 1 OR defined('HHVM_VERSION')) { return; } // ------------------------------------------------------------------------ defined('PASSWORD_BCRYPT') OR define('PASSWORD_BCRYPT', 1); defined('PASSWORD_DEFAULT') OR define('PASSWORD_DEFAULT', PASSWORD_BCRYPT); // ------------------------------------------------------------------------ if ( ! function_exists('password_get_info')) { /** * password_get_info() * * @link http://php.net/password_get_info * @param string $hash * @return array */ function password_get_info($hash) { return (strlen($hash) < 60 OR sscanf($hash, '$2y$%d', $hash) !== 1) ? array('algo' => 0, 'algoName' => 'unknown', 'options' => array()) : array('algo' => 1, 'algoName' => 'bcrypt', 'options' => array('cost' => $hash)); } } // ------------------------------------------------------------------------ if ( ! function_exists('password_hash')) { /** * password_hash() * * @link http://php.net/password_hash * @param string $password * @param int $algo * @param array $options * @return mixed */ function password_hash($password, $algo, array $options = array()) { static $func_overload; isset($func_overload) OR $func_overload = (extension_loaded('mbstring') && ini_get('mbstring.func_overload')); if ($algo !== 1) { trigger_error('password_hash(): Unknown hashing algorithm: '.(int) $algo, E_USER_WARNING); return NULL; } if (isset($options['cost']) && ($options['cost'] < 4 OR $options['cost'] > 31)) { trigger_error('password_hash(): Invalid bcrypt cost parameter specified: '.(int) $options['cost'], E_USER_WARNING); return NULL; } if (isset($options['salt']) && ($saltlen = ($func_overload ? mb_strlen($options['salt'], '8bit') : strlen($options['salt']))) < 22) { trigger_error('password_hash(): Provided salt is too short: '.$saltlen.' expecting 22', E_USER_WARNING); return NULL; } elseif ( ! isset($options['salt'])) { if (function_exists('random_bytes')) { try { $options['salt'] = random_bytes(16); } catch (Exception $e) { log_message('error', 'compat/password: Error while trying to use random_bytes(): '.$e->getMessage()); return FALSE; } } elseif (defined('MCRYPT_DEV_URANDOM')) { $options['salt'] = mcrypt_create_iv(16, MCRYPT_DEV_URANDOM); } elseif (DIRECTORY_SEPARATOR === '/' && (is_readable($dev = '/dev/arandom') OR is_readable($dev = '/dev/urandom'))) { if (($fp = fopen($dev, 'rb')) === FALSE) { log_message('error', 'compat/password: Unable to open '.$dev.' for reading.'); return FALSE; } // Try not to waste entropy ... is_php('5.4') && stream_set_chunk_size($fp, 16); $options['salt'] = ''; for ($read = 0; $read < 16; $read = ($func_overload) ? mb_strlen($options['salt'], '8bit') : strlen($options['salt'])) { if (($read = fread($fp, 16 - $read)) === FALSE) { log_message('error', 'compat/password: Error while reading from '.$dev.'.'); return FALSE; } $options['salt'] .= $read; } fclose($fp); } elseif (function_exists('openssl_random_pseudo_bytes')) { $is_secure = NULL; $options['salt'] = openssl_random_pseudo_bytes(16, $is_secure); if ($is_secure !== TRUE) { log_message('error', 'compat/password: openssl_random_pseudo_bytes() set the $cryto_strong flag to FALSE'); return FALSE; } } else { log_message('error', 'compat/password: No CSPRNG available.'); return FALSE; } $options['salt'] = str_replace('+', '.', rtrim(base64_encode($options['salt']), '=')); } elseif ( ! preg_match('#^[a-zA-Z0-9./]+$#D', $options['salt'])) { $options['salt'] = str_replace('+', '.', rtrim(base64_encode($options['salt']), '=')); } isset($options['cost']) OR $options['cost'] = 10; return (strlen($password = crypt($password, sprintf('$2y$%02d$%s', $options['cost'], $options['salt']))) === 60) ? $password : FALSE; } } // ------------------------------------------------------------------------ if ( ! function_exists('password_needs_rehash')) { /** * password_needs_rehash() * * @link http://php.net/password_needs_rehash * @param string $hash * @param int $algo * @param array $options * @return bool */ function password_needs_rehash($hash, $algo, array $options = array()) { $info = password_get_info($hash); if ($algo !== $info['algo']) { return TRUE; } elseif ($algo === 1) { $options['cost'] = isset($options['cost']) ? (int) $options['cost'] : 10; return ($info['options']['cost'] !== $options['cost']); } // Odd at first glance, but according to a comment in PHP's own unit tests, // because it is an unknown algorithm - it's valid and therefore doesn't // need rehashing. return FALSE; } } // ------------------------------------------------------------------------ if ( ! function_exists('password_verify')) { /** * password_verify() * * @link http://php.net/password_verify * @param string $password * @param string $hash * @return bool */ function password_verify($password, $hash) { if (strlen($hash) !== 60 OR strlen($password = crypt($password, $hash)) !== 60) { return FALSE; } $compare = 0; for ($i = 0; $i < 60; $i++) { $compare |= (ord($password[$i]) ^ ord($hash[$i])); } return ($compare === 0); } }
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