fork download 
  1. <?php
  2.  
  3. function PBKDF1($pass, $salt, $count, $cb)
  4. {
  5.   static $base;
  6.   static $extra;
  7.   static $extracount= 0;
  8.   static $hashno;
  9.   static $state = 0;
  10.  
  11.   if ($state == 0)
  12.   {
  13.     $hashno = 0;
  14.     $state = 1;
  15.  
  16.     $key = $pass . $salt;
  17.     $base = sha1($key, true);
  18.     for($i = 2; $i < $count; $i++)
  19.     {
  20.       $base = sha1($base, true);
  21.     }
  22.   }
  23.  
  24.       $result = "";
  25.  
  26.       if ($extracount > 0)
  27.       {
  28.         $rlen = strlen($extra) - $extracount;
  29.         if ($rlen >= $cb)
  30.         {
  31.           $result = substr($extra, $extracount, $cb);
  32.           if ($rlen > $cb)
  33.           {
  34.             $extracount += $cb;
  35.           }
  36.           else
  37.           {
  38.             $extra = null;
  39.             $extracount = 0;
  40.           }
  41.           return $result;
  42.         }
  43.         $result = substr($extra, $rlen, $rlen);
  44.       }
  45.  
  46.       $current = "";
  47.       $clen = 0;
  48.       $remain = $cb - strlen($result);
  49.       while ($remain > $clen)
  50.       {
  51.         if ($hashno == 0)
  52.         {
  53.           $current = sha1($base, true);
  54.         }
  55.         else if ($hashno < 1000)
  56.         {
  57.           $n = sprintf("%d", $hashno);
  58.           $tmp = $n . $base;
  59.           $current .= sha1($tmp, true);
  60.         }
  61.         $hashno++;
  62.         $clen = strlen($current);     
  63.       }
  64.  
  65.       // $current now holds at least as many bytes as we need
  66.       $result .= substr($current, 0, $remain);
  67.  
  68.       // Save any left over bytes for any future requests
  69.       if ($clen > $remain)
  70.       {
  71.         $extra = $current;
  72.         $extracount = $remain;
  73.       }
  74.  
  75.       return $result; 
  76.     }
  77.  
  78. var_dump(bin2hex(PBKDF1("System", "G:MFX62rlABW:IUYAX(i", 100, 24)));
Success #stdin #stdout 0.03s 52480KB
comments (?)
stdin 
Standard input is empty
stdout 
string(48) "ee4d8bd9734dec177876713c1b8a2e3fe5ca25b829b1ef98"
https://ideone.com/o0YYm0
language:
PHP (php 7.3.5)
created:
8 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!