diff options
Diffstat (limited to 'system/core/compat/password.php')
| -rw-r--r-- | system/core/compat/password.php | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/system/core/compat/password.php b/system/core/compat/password.php new file mode 100644 index 000000000..92fdedb99 --- /dev/null +++ b/system/core/compat/password.php @@ -0,0 +1,216 @@ +<?php +/** + * CodeIgniter + * + * An open source application development framework for PHP 5.2.4 or newer + * + * NOTICE OF LICENSE + * + * Licensed under the Open Software License version 3.0 + * + * This source file is subject to the Open Software License (OSL 3.0) that is + * bundled with this package in the files license.txt / license.rst. It is + * also available through the world wide web at this URL: + * http://opensource.org/licenses/OSL-3.0 + * If you did not receive a copy of the license and are unable to obtain it + * through the world wide web, please send an email to + * licensing@ellislab.com so we can send you a copy immediately. + * + * @package CodeIgniter + * @author EllisLab Dev Team + * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (http://ellislab.com/) + * @license http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0) + * @link http://codeigniter.com + * @since Version 3.0 + * @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 http://codeigniter.com/user_guide/ + * @link http://php.net/password + */ + +// ------------------------------------------------------------------------ + +if (is_php('5.5') OR ! is_php('5.3.7') OR ! defined('CRYPT_BLOWFISH') OR CRYPT_BLOWFISH !== 1) +{ + 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 $options = array()) + { + if ($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']) && strlen($options['salt']) < 22) + { + trigger_error('password_hash(): Provided salt is too short: '.strlen($options['salt']).' expecting 22', E_USER_WARNING); + return NULL; + } + elseif ( ! isset($options['salt'])) + { + if (defined('MCRYPT_DEV_URANDOM')) + { + $options['salt'] = mcrypt_create_iv(16, MCRYPT_DEV_URANDOM); + } + elseif (function_exists('openssl_random_pseudo_bytes')) + { + $options['salt'] = openssl_random_pseudo_bytes(16); + } + elseif (DIRECTORY_SEPARATOR === '/' && (is_readable($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; + } + + $options['salt'] = ''; + for ($read = 0; $read < 16; $read = strlen($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); + } + 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 $options['cost'] = 10; + return crypt($password, sprintf('$2y$%02d$%s', $options['cost'], $options['salt'])); + } +} + +// ------------------------------------------------------------------------ + +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); + } +} + +/* End of file password.php */ +/* Location: ./system/core/compat/password.php */
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