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PHP Script  |  2005-11-16  |  2.7 KB  |  161 lines
  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 $randomPassword;
  61.         }
  62.  
  63. }
  64.  
  65.  
  66. class SHA1Crypt{
  67.  
  68.         function keyED($txt,$encrypt_key)
  69.         {
  70.  
  71.                 $encrypt_key = sha1($encrypt_key);
  72.                 $ctr=0;
  73.                 $tmp = "";
  74.  
  75.                 for ($i=0;$i<strlen($txt);$i++){
  76.                         if ($ctr==strlen($encrypt_key)) $ctr=0;
  77.                         $tmp.= substr($txt,$i,1) ^ substr($encrypt_key,$ctr,1);
  78.                         $ctr++;
  79.                 }
  80.                 return $tmp;
  81.  
  82.         }
  83.  
  84.  
  85.  
  86.         function Encrypt($txt,$key)
  87.         {
  88.  
  89.                 srand((double)microtime()*1000000);
  90.                 $encrypt_key = sha1(rand(0,32000));
  91.                 $ctr=0;
  92.                 $tmp = "";
  93.  
  94.                 for ($i=0;$i<strlen($txt);$i++)
  95.  
  96.                 {
  97.  
  98.                 if ($ctr==strlen($encrypt_key)) $ctr=0;
  99.  
  100.                 $tmp.= substr($encrypt_key,$ctr,1) .
  101.  
  102.                 (substr($txt,$i,1) ^ substr($encrypt_key,$ctr,1));
  103.  
  104.                 $ctr++;
  105.  
  106.                 }
  107.  
  108.                 return base64_encode($this->keyED($tmp,$key));
  109.  
  110.         }
  111.  
  112.  
  113.  
  114.         function Decrypt($txt,$key)
  115.         {
  116.  
  117.                 $txt = $this->keyED(base64_decode($txt),$key);
  118.  
  119.                 $tmp = "";
  120.  
  121.                 for ($i=0;$i<strlen($txt);$i++){
  122.  
  123.                         $sha1 = substr($txt,$i,1);
  124.  
  125.                         $i++;
  126.  
  127.                         $tmp.= (substr($txt,$i,1) ^ $sha1);
  128.  
  129.                 }
  130.  
  131.                 return $tmp;
  132.         }
  133.  
  134.  
  135.  
  136.         function RandPass()
  137.         {
  138.                 $randomPassword = "";
  139.                 srand((double)microtime()*1000000);
  140.  
  141.                 for($i=0;$i<8;$i++)
  142.                 {
  143.  
  144.                         $randnumber = rand(48,120);
  145.  
  146.                         while (($randnumber >= 58 && $randnumber <= 64) || ($randnumber >= 91 && $randnumber <= 96))
  147.                         {
  148.                                 $randnumber = rand(48,120);
  149.                         }
  150.  
  151.                         $randomPassword .= chr($randnumber);
  152.                 }
  153.  
  154.                 return $randomPassword;
  155.  
  156.         }
  157.  
  158.  
  159.  
  160. }
  161. ?>