Etiket: Base64

<?php
class Sifre{
   var $k;
   function Sifre($m){
      $this->k = $m;
   }
   function ed($t) { 
      $r = md5($this->k); 
      $c=0; 
      $v = ""; 
      for ($i=0;$i<strlen($t);$i++) { 
         if ($c==strlen($r)) $c=0; 
         $v.= substr($t,$i,1) ^ substr($r,$c,1); 
         $c++; 
      } 
      return $v; 
   } 
   function sifrele($t){ 
      srand((double)microtime()*1000000); 
      $r = md5(rand(0,32000)); 
      $c=0; 
      $v = ""; 
      for ($i=0;$i<strlen($t);$i++){ 
         if ($c==strlen($r)) $c=0; 
         $v.= substr($r,$c,1) . 
             (substr($t,$i,1) ^ substr($r,$c,1)); 
         $c++; 
      } 
      return base64_encode($this->ed($v)); 
   } 
   function coz($t) { 
      $t = $this->ed(base64_decode($t)); 
      $v = ""; 
      for ($i=0;$i<strlen($t);$i++){ 
         $md5 = substr($t,$i,1); 
         $i++; 
         $v.= (substr($t,$i,1) ^ $md5); 
      } 
      return $v; 
   } 
}
$sifre = "123456";
$cr64 = new Sifre($sifre);
$e = $cr64->sifrele($sifre);
echo "Şifreli = ".$e."<br>";
$d = $cr64->coz($e);
echo "Çözülmüş = ".$d."<br>";
?>

Çıktısı

Şifreli = UzYGZVBkAT8AOFBl
Çözülmüş = 123456