php/skripty/xor_enc.php

   1 <?php
   2
   3 function bin_trim ($bin) {
   4
   5   $x = (8 - strlen($bin));
   6   $y = "";
   7   while($x) {
   8    $y = ($y."0");
   9    $x--;
  10   }
  11   return($y.$bin);
  12
  13 }
  14
  15 function xor_bytes ($bina, $binb) {
  16   $bin = "";
  17   $x = 8;
  18   while($x) {
  19     if ($bina[$x-1] XOR $binb[$x-1])
  20       { $bin = ( 1 . $bin ); } else { $bin = ( 0 . $bin ); }
  21     $x--;
  22   }
  23   return $bin;
  24 }
  25
  26 //CODE/////////////////////////////////////////////////////
  27
  28 $message = "POKUS CISLO JEDNA DVA TRI";
  29 $message = ")-#&O&$6(.:E/-:H&#&*H--$.";
  30 $message = "message MESSAGE toto je pokus 545446653\9aèøèø\9eøýá ahoj";
  31 //$message = "%-\e\14) -g&\ 2\11\10\12\ 23N\1f%\1d\15Z\8b\98\17F\97\83\9d\8eÍÜ\ 4\fÝA×CÔI{¼ªÝÌÛÌ¸Õe\e\89\15\93";
  32 $message = implode("", file("cypher.txt"));
  33 $code = "HHhgHGHGkGBCSEvnkJizzáý76øèèýíé09éuáuázáTR54E4E4Ezázùdlmkdsfh-";
  34
  35 //print "Pocet parametru: " . $argc . "\n";
  36 //foreach($argv as $param)
  37 //    print $param . "\n";
  38
  39 //if($argc != 3) { die("Usage: xor.php secretcode in.txt > out.txt\n"); }
  40
  41 //echo($argv[0]."\n");
  42 //$code = $argv[1];
  43 //$message = implode("", file($argv[2]));
  44 $message = "&.(\fh\1c(-fKH-)!F\ 5
  45 g%«ÍH$\ 6,7
  46 Y";
  47 $code = "gfgFHJghGjhghjfVHGhjGhjGvvXfgdTGfHgHfgFhfVBGcftDtFzdfdgfgf6ztFzF";
  48
  49
  50
  51 //Message to bin array:
  52 $i = 0;
  53 $message_bin = "";
  54 while($i < strlen($message)) {
  55   $message_bin = ($message_bin . bin_trim(base_convert(ord($message[$i]),10,2)). "\n " );
  56   $i++;
  57 }
  58 //echo ($message_bin."\n\n"); //Debug
  59
  60 $message_bin = explode(" ",$message_bin);
  61
  62 //Encode:
  63 $i = 0;
  64 $y = 0;
  65 while ($i < strlen($message)) {
  66
  67   $char = $message_bin[$i];
  68   $cchar = bin_trim( base_convert( ord($code[$y]), 10, 2) );
  69
  70   //echo($code[$y]); //Debug
  71   //echo($cchar."\n"); //Debug
  72   //echo($char); //Debug
  73
  74   $message[$i] = chr( base_convert(xor_bytes($char, $cchar),2,10 ));
  75
  76   $y++;
  77   if ($y >= strlen($code)) { $y = 0; }
  78   $i++;
  79
  80 }
  81
  82 echo($message);
  83
  84 ?>