some.php
<?php
if (!defined('PHP_VERSION_ID')) {
$version = explode('.', PHP_VERSION);
define('PHP_VERSION_ID', ($version[0] * 10000 + $version[1] * 100 + $version[2]));
}
if ($version[0] == 4)
require_once("lib/hash_hmac.php");
$hmac = hash_hmac('sha256', $url, SECRET_KEY);
?>
lib\hash_hmac.php
<?php
require_once dirname(__FILE__) . '/hash.php';
/**
* Replace hash_hmac()
*
* @category PHP
* @package PHP_Compat
* @license LGPL - http://www.gnu.org/licenses/lgpl.html
* @copyright 2004-2007 Aidan Lister <aidan@php.net>, Arpad Ray <arpad@php.net>
* @link http://php.net/function.hash_hmac
* @author revulo <revulon@gmail.com>
* @since PHP 5.1.2
* @require PHP 4.0.1 (str_pad)
*/
function php_compat_hash_hmac($algo, $data, $key, $raw_output = false)
{
// Block size (byte) for MD5, SHA-1 and SHA-256.
$blocksize = 64;
$ipad = str_repeat("\x36", $blocksize);
$opad = str_repeat("\x5c", $blocksize);
if (strlen($key) > $blocksize) {
$key = hash($algo, $key, true);
} else {
$key = str_pad($key, $blocksize, "\x00");
}
$ipad ^= $key;
$opad ^= $key;
return hash($algo, $opad . hash($algo, $ipad . $data, true), $raw_output);
}
// Define
if (!function_exists('hash_hmac')) {
function hash_hmac($algo, $data, $key, $raw_output = false)
{
return php_compat_hash_hmac($algo, $data, $key, $raw_output);
}
}
lib\hash.php
<?php
/**
* Replace hash()
*
* @category PHP
* @package PHP_Compat
* @license LGPL - http://www.gnu.org/licenses/lgpl.html
* @copyright 2004-2007 Aidan Lister <aidan@php.net>, Arpad Ray <arpad@php.net>
* @link http://php.net/function.hash
* @author revulo <revulon@gmail.com>
* @since PHP 5.1.2
* @require PHP 4.0.0 (user_error)
*/
function php_compat_hash($algo, $data, $raw_output = false)
{
$algo = strtolower($algo);
switch ($algo) {
case 'md5':
$hash = md5($data);
break;
case 'sha1':
if (!function_exists('sha1')) {
require dirname(__FILE__) . '/sha1.php';
}
$hash = sha1($data);
break;
case 'sha256':
//if (!function_exists('php_compat_sha256')) {
// require dirname(__FILE__) . '/_sha256.php';
//}
//$hash = php_compat_sha256($data);
require_once dirname(__FILE__) . '/sha256.php';
$hash = SHA256::hash($data);
break;
default:
user_error('hash(): Unknown hashing algorithm: ' . $algo, E_USER_WARNING);
return false;
}
if ($raw_output) {
return pack('H*', $hash);
} else {
return $hash;
}
}
// Define
if (!function_exists('hash')) {
function hash($algo, $data, $raw_output = false)
{
return php_compat_hash($algo, $data, $raw_output);
}
}
