[Sommaire] [Imprimer]

   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  ?>