crypt.module.php

来自「PHP 连接ACCESS MYSQL 数据库公共类 包括部分功能:跳转页面,所有」· PHP 代码 · 共 46 行

<?php 
function keyED($txt,$encrypt_key) 
{ 
$encrypt_key = md5($encrypt_key); 
$ctr=0; 
$tmp = ""; 
for ($i=0;$i<strlen($txt);$i++) 
{ 
if ($ctr==strlen($encrypt_key)) $ctr=0; 
$tmp.= substr($txt,$i,1) ^ substr($encrypt_key,$ctr,1); 
$ctr++; 
} 
return $tmp; 
} 

function ENCRYPT($txt,$key) 
{ 
srand((double)microtime()*1000000); 
$encrypt_key = md5(rand(0,32000)); 
$ctr=0; 
$tmp = ""; 
for ($i=0;$i<strlen($txt);$i++) 
{ 
if ($ctr==strlen($encrypt_key)) $ctr=0; 
$tmp.= substr($encrypt_key,$ctr,1) . 
(substr($txt,$i,1) ^ substr($encrypt_key,$ctr,1)); 
$ctr++; 
} 
return base64_encode(keyED($tmp,$key)); 
} 

function DECRYPT($txt,$key) 
{ 
$txt = base64_decode($txt);
$txt = keyED($txt,$key); 
$tmp = ""; 
for ($i=0;$i<strlen($txt);$i++) 
{ 
$md5 = substr($txt,$i,1); 
$i++; 
$tmp.= (substr($txt,$i,1) ^ $md5); 
} 
return $tmp; 
} 

?>