45 lines
1.1 KiB
PHP
45 lines
1.1 KiB
PHP
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<?php
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include 'hash.php';
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/**
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* Replace hash_hmac()
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*
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* @category PHP
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* @package PHP_Compat
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* @license LGPL - http://www.gnu.org/licenses/lgpl.html
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* @copyright 2004-2007 Aidan Lister <aidan@php.net>, Arpad Ray <arpad@php.net>
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* @link http://php.net/function.hash_hmac
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* @author revulo <revulon@gmail.com>
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* @since PHP 5.1.2
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* @require PHP 4.0.1 (str_pad)
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*/
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function php_compat_hash_hmac($algo, $data, $key, $raw_output = false)
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{
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// Block size (byte) for MD5, SHA-1 and SHA-256.
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$blocksize = 64;
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$ipad = str_repeat("\x36", $blocksize);
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$opad = str_repeat("\x5c", $blocksize);
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if (strlen($key) > $blocksize) {
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$key = hash($algo, $key, true);
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} else {
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$key = str_pad($key, $blocksize, "\x00");
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}
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$ipad ^= $key;
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$opad ^= $key;
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return hash($algo, $opad . hash($algo, $ipad . $data, true), $raw_output);
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}
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// Define
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if (!function_exists('hash_hmac4')) {
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function hash_hmac4($algo, $data, $key, $raw_output = false)
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{
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return php_compat_hash_hmac($algo, $data, $key, $raw_output);
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}
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}
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?>
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