dev-test/old/bak/encrypt.php

   1 <?php
   2
   3 include('config.php');
   4
   5 function Encrypt($str, $key = "your_key") {
   6         return enc_dec_wkey("encrypt", $str, $key);
   7 }
   8 function Decrypt($str, $key = "your_key") {
   9         return enc_dec_wkey("decrypt", $str, $key);
  10 }
  11 function enc_dec_wkey($mode, $str, $key='') {
  12         if($key==='') return $str;
  13         if($mode=== "decrypt") $str = base64_decode($str);
  14         $key = str_replace(chr(32),'',$key);
  15         if(strlen($key) < 8) exit('key error');
  16         $kl = strlen($key) < 32 ? strlen($key) : 32;
  17         $k = array();
  18         for ($i = 0; $i < $kl; $i++) $k[$i] = ord($key{$i}) & 0x1F;
  19         $j = 0;
  20         for($i = 0; $i < strlen($str); $i++) {
  21         $e = ord($str{$i});
  22         $str{$i} = $e & 0xE0 ? chr($e^$k[$j]): chr($e);
  23         $j++;
  24         $j = $j == $kl ? 0 : $j;
  25         }
  26         if($mode == "encrypt")
  27         return base64_encode($str);
  28         else
  29         return $str;
  30 }
  31 ?>