include mhash from php compat

plugins/Msn/extlib/compat/mhash.php

@@ -0,0 +1,115 @@
+<?php
+// +----------------------------------------------------------------------+
+// | PHP Version 4                                                        |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 1997-2004 The PHP Group                                |
+// +----------------------------------------------------------------------+
+// | This source file is subject to version 3.0 of the PHP license,       |
+// | that is bundled with this package in the file LICENSE, and is        |
+// | available at through the world-wide-web at                           |
+// | http://www.php.net/license/3_0.txt.                                  |
+// | If you did not receive a copy of the PHP license and are unable to   |
+// | obtain it through the world-wide-web, please send a note to          |
+// | license@php.net so we can mail you a copy immediately.               |
+// +----------------------------------------------------------------------+
+// | Authors: Aidan Lister <aidan@php.net>                                |
+// +----------------------------------------------------------------------+
+//
+// $Id: mhash.php,v 1.1 2005/05/10 07:56:44 aidan Exp $
+
+
+if (!defined('MHASH_CRC32')) {
+    define('MHASH_CRC32', 0);
+}
+
+if (!defined('MHASH_MD5')) {
+    define('MHASH_MD5', 1);
+}
+
+if (!defined('MHASH_SHA1')) {
+    define('MHASH_SHA1', 2);
+}
+
+if (!defined('MHASH_HAVAL256')) {
+    define('MHASH_HAVAL256', 3);
+}
+
+if (!defined('MHASH_RIPEMD160')) {
+    define('MHASH_RIPEMD160', 5);
+}
+
+if (!defined('MHASH_TIGER')) {
+    define('MHASH_TIGER', 7);
+}
+
+if (!defined('MHASH_GOST')) {
+    define('MHASH_GOST', 8);
+}
+
+if (!defined('MHASH_CRC32B')) {
+    define('MHASH_CRC32B', 9);
+}
+
+if (!defined('MHASH_HAVAL192')) {
+    define('MHASH_HAVAL192', 11);
+}
+
+if (!defined('MHASH_HAVAL160')) {
+    define('MHASH_HAVAL160', 12);
+}
+
+if (!defined('MHASH_HAVAL128')) {
+    define('MHASH_HAVAL128', 13);
+}
+
+if (!defined('MHASH_TIGER128')) {
+    define('MHASH_TIGER128', 14);
+}
+
+if (!defined('MHASH_TIGER160')) {
+    define('MHASH_TIGER160', 15);
+}
+
+if (!defined('MHASH_MD4')) {
+    define('MHASH_MD4', 16);
+}
+
+if (!defined('MHASH_SHA256')) {
+    define('MHASH_SHA256', 17);
+}
+
+if (!defined('MHASH_ADLER32')) {
+    define('MHASH_ADLER32', 18);
+}
+
+
+/**
+ * Replace mhash()
+ *
+ * @category    PHP
+ * @package     PHP_Compat
+ * @link        http://php.net/function.mhash
+ * @author      Aidan Lister <aidan@php.net>
+ * @version     $Revision: 1.1 $
+ * @since       PHP 4.1.0
+ * @require     PHP 4.0.0 (user_error)
+ */
+if (!function_exists('mhash')) {
+    function mhash($hashtype, $data, $key = '')    
+    {
+        switch ($hashtype) {
+            case MHASH_MD5:
+                $key = str_pad((strlen($key) > 64 ? pack("H*", md5($key)) : $key), 64, chr(0x00));
+                $k_opad = $key ^ (str_pad('', 64, chr(0x5c)));
+                $k_ipad = $key ^ (str_pad('', 64, chr(0x36)));
+                return pack("H*", md5($k_opad . pack("H*", md5($k_ipad .  $data))));
+
+            default:
+                return false;
+
+            break;
+        }
+    }
+}
+
+?>