library/adodb/session/old/crypt.inc.php

   1 <?php
   2 //       Session Encryption by Ari Kuorikoski <ari.kuorikoski@finebyte.com>
   3 class MD5Crypt{
   4                 function keyED($txt,$encrypt_key)
   5                 {
   6                                 $encrypt_key = md5($encrypt_key);
   7                                 $ctr=0;
   8                                 $tmp = "";
   9                                 for ($i=0;$i<strlen($txt);$i++){
  10                                                 if ($ctr==strlen($encrypt_key)) $ctr=0;
  11                                                 $tmp.= substr($txt,$i,1) ^ substr($encrypt_key,$ctr,1);
  12                                                 $ctr++;
  13                                 }
  14                                 return $tmp;
  15                 }
  16
  17                 function Encrypt($txt,$key)
  18                 {
  19                                 srand((double)microtime()*1000000);
  20                                 $encrypt_key = md5(rand(0,32000));
  21                                 $ctr=0;
  22                                 $tmp = "";
  23                                 for ($i=0;$i<strlen($txt);$i++)
  24                                 {
  25                                 if ($ctr==strlen($encrypt_key)) $ctr=0;
  26                                 $tmp.= substr($encrypt_key,$ctr,1) .
  27                                 (substr($txt,$i,1) ^ substr($encrypt_key,$ctr,1));
  28                                 $ctr++;
  29                                 }
  30                                 return base64_encode($this->keyED($tmp,$key));
  31                 }
  32
  33                 function Decrypt($txt,$key)
  34                 {
  35                                 $txt = $this->keyED(base64_decode($txt),$key);
  36                                 $tmp = "";
  37                                 for ($i=0;$i<strlen($txt);$i++){
  38                                                 $md5 = substr($txt,$i,1);
  39                                                 $i++;
  40                                                 $tmp.= (substr($txt,$i,1) ^ $md5);
  41                                 }
  42                                 return $tmp;
  43                 }
  44
  45                 function RandPass()
  46                 {
  47                                 $randomPassword = "";
  48                                 srand((double)microtime()*1000000);
  49                                 for($i=0;$i<8;$i++)
  50                                 {
  51                                                 $randnumber = rand(48,120);
  52
  53                                                 while (($randnumber >= 58 && $randnumber <= 64) || ($randnumber >= 91 && $randnumber <= 96))
  54                                                 {
  55                                                                 $randnumber = rand(48,120);
  56                                                 }
  57
  58                                                 $randomPassword .= chr($randnumber);
  59                                 }
  60                                 return $randomPassword;
  61                 }
  62
  63 }
  64 ?>