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hmac.php
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<?php include '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), $raw_output); } // Define if (!function_exists('hash_hmac4')) { function hash_hmac4($algo, $data, $key, $raw_output = false) { return php_compat_hash_hmac($algo, $data, $key, $raw_output); } } ?>