forked from mirrors/easyappointments
252 lines
6.7 KiB
PHP
252 lines
6.7 KiB
PHP
<?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/hash compatibility package
|
|
*
|
|
* @package CodeIgniter
|
|
* @subpackage CodeIgniter
|
|
* @category Compatibility
|
|
* @author Andrey Andreev
|
|
* @link https://codeigniter.com/userguide3/
|
|
* @link https://secure.php.net/hash
|
|
*/
|
|
|
|
// ------------------------------------------------------------------------
|
|
|
|
if (is_php('5.6'))
|
|
{
|
|
return;
|
|
}
|
|
|
|
// ------------------------------------------------------------------------
|
|
|
|
if ( ! function_exists('hash_equals'))
|
|
{
|
|
/**
|
|
* hash_equals()
|
|
*
|
|
* @link https://secure.php.net/hash_equals
|
|
* @param string $known_string
|
|
* @param string $user_string
|
|
* @return bool
|
|
*/
|
|
function hash_equals($known_string, $user_string)
|
|
{
|
|
if ( ! is_string($known_string))
|
|
{
|
|
trigger_error('hash_equals(): Expected known_string to be a string, '.strtolower(gettype($known_string)).' given', E_USER_WARNING);
|
|
return FALSE;
|
|
}
|
|
elseif ( ! is_string($user_string))
|
|
{
|
|
trigger_error('hash_equals(): Expected user_string to be a string, '.strtolower(gettype($user_string)).' given', E_USER_WARNING);
|
|
return FALSE;
|
|
}
|
|
elseif (($length = strlen($known_string)) !== strlen($user_string))
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
$diff = 0;
|
|
for ($i = 0; $i < $length; $i++)
|
|
{
|
|
$diff |= ord($known_string[$i]) ^ ord($user_string[$i]);
|
|
}
|
|
|
|
return ($diff === 0);
|
|
}
|
|
}
|
|
|
|
// ------------------------------------------------------------------------
|
|
|
|
if (is_php('5.5'))
|
|
{
|
|
return;
|
|
}
|
|
|
|
// ------------------------------------------------------------------------
|
|
|
|
if ( ! function_exists('hash_pbkdf2'))
|
|
{
|
|
/**
|
|
* hash_pbkdf2()
|
|
*
|
|
* @link https://secure.php.net/hash_pbkdf2
|
|
* @param string $algo
|
|
* @param string $password
|
|
* @param string $salt
|
|
* @param int $iterations
|
|
* @param int $length
|
|
* @param bool $raw_output
|
|
* @return string
|
|
*/
|
|
function hash_pbkdf2($algo, $password, $salt, $iterations, $length = 0, $raw_output = FALSE)
|
|
{
|
|
if ( ! in_array(strtolower($algo), hash_algos(), TRUE))
|
|
{
|
|
trigger_error('hash_pbkdf2(): Unknown hashing algorithm: '.$algo, E_USER_WARNING);
|
|
return FALSE;
|
|
}
|
|
|
|
if (($type = gettype($iterations)) !== 'integer')
|
|
{
|
|
if ($type === 'object' && method_exists($iterations, '__toString'))
|
|
{
|
|
$iterations = (string) $iterations;
|
|
}
|
|
|
|
if (is_string($iterations) && is_numeric($iterations))
|
|
{
|
|
$iterations = (int) $iterations;
|
|
}
|
|
else
|
|
{
|
|
trigger_error('hash_pbkdf2() expects parameter 4 to be long, '.$type.' given', E_USER_WARNING);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
if ($iterations < 1)
|
|
{
|
|
trigger_error('hash_pbkdf2(): Iterations must be a positive integer: '.$iterations, E_USER_WARNING);
|
|
return FALSE;
|
|
}
|
|
|
|
if (($type = gettype($length)) !== 'integer')
|
|
{
|
|
if ($type === 'object' && method_exists($length, '__toString'))
|
|
{
|
|
$length = (string) $length;
|
|
}
|
|
|
|
if (is_string($length) && is_numeric($length))
|
|
{
|
|
$length = (int) $length;
|
|
}
|
|
else
|
|
{
|
|
trigger_error('hash_pbkdf2() expects parameter 5 to be long, '.$type.' given', E_USER_WARNING);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
if ($length < 0)
|
|
{
|
|
trigger_error('hash_pbkdf2(): Length must be greater than or equal to 0: '.$length, E_USER_WARNING);
|
|
return FALSE;
|
|
}
|
|
|
|
$hash_length = defined('MB_OVERLOAD_STRING')
|
|
? mb_strlen(hash($algo, NULL, TRUE), '8bit')
|
|
: strlen(hash($algo, NULL, TRUE));
|
|
empty($length) && $length = $hash_length;
|
|
|
|
// Pre-hash password inputs longer than the algorithm's block size
|
|
// (i.e. prepare HMAC key) to mitigate potential DoS attacks.
|
|
static $block_sizes;
|
|
empty($block_sizes) && $block_sizes = array(
|
|
'gost' => 32,
|
|
'haval128,3' => 128,
|
|
'haval160,3' => 128,
|
|
'haval192,3' => 128,
|
|
'haval224,3' => 128,
|
|
'haval256,3' => 128,
|
|
'haval128,4' => 128,
|
|
'haval160,4' => 128,
|
|
'haval192,4' => 128,
|
|
'haval224,4' => 128,
|
|
'haval256,4' => 128,
|
|
'haval128,5' => 128,
|
|
'haval160,5' => 128,
|
|
'haval192,5' => 128,
|
|
'haval224,5' => 128,
|
|
'haval256,5' => 128,
|
|
'md2' => 16,
|
|
'md4' => 64,
|
|
'md5' => 64,
|
|
'ripemd128' => 64,
|
|
'ripemd160' => 64,
|
|
'ripemd256' => 64,
|
|
'ripemd320' => 64,
|
|
'sha1' => 64,
|
|
'sha224' => 64,
|
|
'sha256' => 64,
|
|
'sha384' => 128,
|
|
'sha512' => 128,
|
|
'snefru' => 32,
|
|
'snefru256' => 32,
|
|
'tiger128,3' => 64,
|
|
'tiger160,3' => 64,
|
|
'tiger192,3' => 64,
|
|
'tiger128,4' => 64,
|
|
'tiger160,4' => 64,
|
|
'tiger192,4' => 64,
|
|
'whirlpool' => 64
|
|
);
|
|
|
|
if (isset($block_sizes[$algo], $password[$block_sizes[$algo]]))
|
|
{
|
|
$password = hash($algo, $password, TRUE);
|
|
}
|
|
|
|
$hash = '';
|
|
// Note: Blocks are NOT 0-indexed
|
|
for ($bc = (int) ceil($length / $hash_length), $bi = 1; $bi <= $bc; $bi++)
|
|
{
|
|
$key = $derived_key = hash_hmac($algo, $salt.pack('N', $bi), $password, TRUE);
|
|
for ($i = 1; $i < $iterations; $i++)
|
|
{
|
|
$derived_key ^= $key = hash_hmac($algo, $key, $password, TRUE);
|
|
}
|
|
|
|
$hash .= $derived_key;
|
|
}
|
|
|
|
// This is not RFC-compatible, but we're aiming for natural PHP compatibility
|
|
if ( ! $raw_output)
|
|
{
|
|
$hash = bin2hex($hash);
|
|
}
|
|
|
|
return defined('MB_OVERLOAD_STRING')
|
|
? mb_substr($hash, 0, $length, '8bit')
|
|
: substr($hash, 0, $length);
|
|
}
|
|
}
|