includes/rijndael.php
author Dan
Wed, 11 Jul 2007 15:18:14 -0400
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child 229 b2f985e4cef3
permissions -rw-r--r--
Last-minute change to width/height on embedded images
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<?php
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/**
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 * Phijndael - an implementation of the AES encryption standard in PHP
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 * Originally written by Fritz Schneider <fritz AT cd DOT ucsd DOT edu>
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 * Ported to PHP by Dan Fuhry <dan AT enano DOT homelinux DOT org>
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 * @package phijndael
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 * @author Fritz Schneider
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 * @author Dan Fuhry
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 * @license BSD-style license
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 */
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error_reporting(E_ALL);
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define ('ENC_HEX', 201);
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define ('ENC_BASE64', 202);
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define ('ENC_BINARY', 203);
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class AESCrypt {
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  var $debug = false;
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  var $mcrypt = false;
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  // Rijndael parameters --  Valid values are 128, 192, or 256
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  var $keySizeInBits = 128;
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  var $blockSizeInBits = 128;
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  ///////  You shouldn't have to modify anything below this line except for
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  ///////  the function getRandomBytes().
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  //
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  // Note: in the following code the two dimensional arrays are indexed as
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  //       you would probably expect, as array[row][column]. The state arrays
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  //       are 2d arrays of the form state[4][Nb].
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  // The number of rounds for the cipher, indexed by [Nk][Nb]
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  var $roundsArray = Array(0,0,0,0,Array(0,0,0,0,10,0, 12,0, 14),0, 
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                               Array(0,0,0,0,12,0, 12,0, 14),0, 
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                               Array(0,0,0,0,14,0, 14,0, 14) );
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  // The number of bytes to shift by in shiftRow, indexed by [Nb][row]
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  var $shiftOffsets = Array(0,0,0,0,Array(0,1, 2, 3),0,Array(0,1, 2, 3),0,Array(0,1, 3, 4) );
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  // The round constants used in subkey expansion
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  var $Rcon = Array( 
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  0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 
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  0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 
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  0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 
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  0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 
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  0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91 );
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  // Precomputed lookup table for the SBox
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  var $SBox = Array(
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   99, 124, 119, 123, 242, 107, 111, 197,  48,   1, 103,  43, 254, 215, 171, 
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  118, 202, 130, 201, 125, 250,  89,  71, 240, 173, 212, 162, 175, 156, 164, 
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  114, 192, 183, 253, 147,  38,  54,  63, 247, 204,  52, 165, 229, 241, 113, 
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  216,  49,  21,   4, 199,  35, 195,  24, 150,   5, 154,   7,  18, 128, 226, 
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  235,  39, 178, 117,   9, 131,  44,  26,  27, 110,  90, 160,  82,  59, 214, 
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  179,  41, 227,  47, 132,  83, 209,   0, 237,  32, 252, 177,  91, 106, 203, 
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  190,  57,  74,  76,  88, 207, 208, 239, 170, 251,  67,  77,  51, 133,  69, 
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  249,   2, 127,  80,  60, 159, 168,  81, 163,  64, 143, 146, 157,  56, 245, 
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  188, 182, 218,  33,  16, 255, 243, 210, 205,  12,  19, 236,  95, 151,  68,  
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  23,  196, 167, 126,  61, 100,  93,  25, 115,  96, 129,  79, 220,  34,  42, 
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  144, 136,  70, 238, 184,  20, 222,  94,  11, 219, 224,  50,  58,  10,  73,
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    6,  36,  92, 194, 211, 172,  98, 145, 149, 228, 121, 231, 200,  55, 109, 
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  141, 213,  78, 169, 108,  86, 244, 234, 101, 122, 174,   8, 186, 120,  37,  
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   46,  28, 166, 180, 198, 232, 221, 116,  31,  75, 189, 139, 138, 112,  62, 
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  181, 102,  72,   3, 246,  14,  97,  53,  87, 185, 134, 193,  29, 158, 225,
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  248, 152,  17, 105, 217, 142, 148, 155,  30, 135, 233, 206,  85,  40, 223,
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   22 );
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  // Precomputed lookup table for the inverse SBox
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  var $SBoxInverse = Array(
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   82,   9, 106, 213,  48,  54, 165,  56, 191,  64, 163, 158, 129, 243, 215, 
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  204,  93, 101, 182, 146, 108, 112,  72,  80, 253, 237, 185, 218,  94,  21,  
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   70,  87, 167, 141, 157, 132, 144, 216, 171,   0, 140, 188, 211,  10, 247, 
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  234, 151, 242, 207, 206, 240, 180, 230, 115, 150, 172, 116,  34, 231, 173,
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   51, 136,   7, 199,  49, 177,  18,  16,  89,  39, 128, 236,  95,  96,  81,
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  224,  59,  77, 174,  42, 245, 176, 200, 235, 187,  60, 131,  83, 153,  97, 
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  125 );
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  function AESCrypt($ks = 128, $bs = 128, $debug = false)
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  {
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    $this->__construct($ks, $bs, $debug);
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  }
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  function __construct($ks = 128, $bs = 128, $debug = false)
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  {
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    $this->keySizeInBits = $ks;
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    $this->blockSizeInBits = $bs;
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    // Use the Mcrypt library? This speeds things up dramatically.
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    if(defined('MCRYPT_RIJNDAEL_' . $ks) && defined('MCRYPT_ACCEL'))
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    {
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      eval('$mcb = MCRYPT_RIJNDAEL_' . $ks.';');
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      $bks = mcrypt_module_get_algo_block_size($mcb);
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      $bks = $bks * 8;
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      if ( $bks != $bs )
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      {
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        $mcb = false;
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        echo (string)$bks;
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      }
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    }
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    else
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    {
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      $mcb = false;
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    }
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    $this->mcrypt = $mcb;
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    // Cipher parameters ... do not change these
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    $this->Nk = $this->keySizeInBits / 32;
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    $this->Nb = $this->blockSizeInBits / 32;
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    $this->Nr = $this->roundsArray[$this->Nk][$this->Nb];
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    $this->debug = $debug;
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  }
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  // Error handler
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  function trigger_error($text, $level = E_USER_NOTICE)
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  {
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    $bt = debug_backtrace();
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    $lastfunc =& $bt[1];
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    switch($level)
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    {
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      case E_USER_NOTICE:
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      default:
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        $desc = 'Notice';
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        break;
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      case E_USER_WARNING:
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        $desc = 'Warning';
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        break;
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      case E_USER_ERROR:
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        $desc = 'Fatal';
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        break;
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    }
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    ob_start();
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    if($this->debug || $level == E_USER_ERROR) echo "AES encryption: <b>{$desc}:</b> $text in {$lastfunc['file']} on line {$lastfunc['line']} in function {$lastfunc['function']}<br />";
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    if($this->debug)
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    {
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      //echo '<pre>'.enano_debug_print_backtrace(true).'</pre>';
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    }
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    ob_end_flush();
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    if($level == E_USER_ERROR)
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    {
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      echo '<p><b>This can sometimes happen if you are upgrading Enano to a new version and did not log out first.</b> <a href="'.$_SERVER['PHP_SELF'].'?do=diag&amp;sub=cookie_destroy">Click here</a> to force cookies to clear and try again. You will be logged out.</p>';
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      exit;
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    }
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  }
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  function array_slice_js_compat($array, $start, $finish = 0)
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  {
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    $len = $finish - $start;
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    if($len < 0) $len = 0 - $len;
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    //if($this->debug) echo (string)$len . ' ';
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    //if(count($array) < $start + $len)
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    //  $this->trigger_error('Index out of range', E_USER_WARNING);
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    return array_slice($array, $start, $len);
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  }
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  function concat($s1, $s2)
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  {
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    if(is_array($s1) && is_array($s2))
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      return array_merge($s1, $s2);
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    elseif( ( is_array($s1) && !is_array($s2) ) || ( !is_array($s1) && is_array($s2) ) )
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    {
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      $this->trigger_error('incompatible types - you can\'t combine a non-array with an array', E_USER_WARNING);
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      return false;
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    }
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    else
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      return $s1 . $s2;
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  }
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  // This method circularly shifts the array left by the number of elements
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  // given in its parameter. It returns the resulting array and is used for 
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  // the ShiftRow step. Note that shift() and push() could be used for a more 
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  // elegant solution, but they require IE5.5+, so I chose to do it manually. 
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  function cyclicShiftLeft($theArray, $positions) {
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    if(!is_int($positions))
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    {
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      $this->trigger_error('$positions is not an integer! Backtrace:<br /><pre>'.print_r(debug_backtrace(), true).'</pre>', E_USER_WARNING);
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      return false;
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    }
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    $second = array_slice($theArray, 0, $positions);
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    $first = array_slice($theArray, $positions);
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    $theArray = array_merge($first, $second);
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    return $theArray;
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  }
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  // Multiplies the element "poly" of GF(2^8) by x. See the Rijndael spec.
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  function xtime($poly) {
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    $poly <<= 1;
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    return (($poly & 0x100) ? ($poly ^ 0x11B) : ($poly));
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  }
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  // Multiplies the two elements of GF(2^8) together and returns the result.
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  // See the Rijndael spec, but should be straightforward: for each power of
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  // the indeterminant that has a 1 coefficient in x, add y times that power
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  // to the result. x and y should be bytes representing elements of GF(2^8)
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  function mult_GF256($x, $y) {
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    $result = 0;
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    for ($bit = 1; $bit < 256; $bit *= 2, $y = $this->xtime($y)) {
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      if ($x & $bit) 
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        $result ^= $y;
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    }
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    return $result;
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  }
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  // Performs the substitution step of the cipher. State is the 2d array of
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  // state information (see spec) and direction is string indicating whether
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  // we are performing the forward substitution ("encrypt") or inverse 
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  // substitution (anything else)
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   230
  
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  function byteSub(&$state, $direction) {
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    //global $this->SBox, $this->SBoxInverse, $this->Nb;
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    if ($direction == "encrypt")           // Point S to the SBox we're using
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      $S =& $this->SBox;
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    else
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      $S =& $this->SBoxInverse;
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    for ($i = 0; $i < 4; $i++)           // Substitute for every byte in state
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      for ($j = 0; $j < $this->Nb; $j++)
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         $state[$i][$j] = $S[$state[$i][$j]];
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  }
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  // Performs the row shifting step of the cipher.
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  function shiftRow(&$state, $direction) {
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    //global $this->Nb, $this->shiftOffsets;
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    for ($i=1; $i<4; $i++)               // Row 0 never shifts
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      if ($direction == "encrypt")
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         $state[$i] = $this->cyclicShiftLeft($state[$i], $this->shiftOffsets[$this->Nb][$i]);
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      else
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         $state[$i] = $this->cyclicShiftLeft($state[$i], $this->Nb - $this->shiftOffsets[$this->Nb][$i]);
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  }
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   253
  
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  // Performs the column mixing step of the cipher. Most of these steps can
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  // be combined into table lookups on 32bit values (at least for encryption)
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  // to greatly increase the speed. 
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   257
  
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  function mixColumn(&$state, $direction) {
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    //global $this->Nb;
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    $b = Array();                                  // Result of matrix multiplications
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    for ($j = 0; $j < $this->Nb; $j++) {                 // Go through each column...
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      for ($i = 0; $i < 4; $i++) {                 // and for each row in the column...
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diff changeset
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        if ($direction == "encrypt")
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          $b[$i] = $this->mult_GF256($state[$i][$j], 2) ^ // perform mixing
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                   $this->mult_GF256($state[($i+1)%4][$j], 3) ^ 
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                   $state[($i+2)%4][$j] ^ 
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                   $state[($i+3)%4][$j];
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        else 
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          $b[$i] = $this->mult_GF256($state[$i][$j], 0xE) ^ 
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                   $this->mult_GF256($state[($i+1)%4][$j], 0xB) ^
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                   $this->mult_GF256($state[($i+2)%4][$j], 0xD) ^
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                   $this->mult_GF256($state[($i+3)%4][$j], 9);
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      }
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      for ($i = 0; $i < 4; $i++)          // Place result back into column
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        $state[$i][$j] = $b[$i];
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    }
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  }
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  // Adds the current round key to the state information. Straightforward.
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  function addRoundKey(&$state, $roundKey) {
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    //global $this->Nb;
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    for ($j = 0; $j < $this->Nb; $j++) {                      // Step through columns...
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      $state[0][$j] ^= ( $roundKey[$j] & 0xFF);         // and XOR
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      $state[1][$j] ^= (($roundKey[$j]>>8) & 0xFF);
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      $state[2][$j] ^= (($roundKey[$j]>>16) & 0xFF);
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      $state[3][$j] ^= (($roundKey[$j]>>24) & 0xFF);
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    }
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  }
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  // This function creates the expanded key from the input (128/192/256-bit)
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  // key. The parameter key is an array of bytes holding the value of the key.
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  // The returned value is an array whose elements are the 32-bit words that 
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  // make up the expanded key.
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  function keyExpansion($key) {
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    //global $this->keySizeInBits, $this->blockSizeInBits, $this->roundsArray, $this->Nk, $this->Nb, $this->Nr, $this->Nk, $this->SBox, $this->Rcon;
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    $expandedKey = Array();
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    // in case the key size or parameters were changed...
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    $this->Nk = $this->keySizeInBits / 32;                   
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    $this->Nb = $this->blockSizeInBits / 32;
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    $this->Nr = $this->roundsArray[$this->Nk][$this->Nb];
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    for ($j=0; $j < $this->Nk; $j++)     // Fill in input key first
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      $expandedKey[$j] = 
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        ($key[4*$j]) | ($key[4*$j+1]<<8) | ($key[4*$j+2]<<16) | ($key[4*$j+3]<<24);
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    // Now walk down the rest of the array filling in expanded key bytes as
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    // per Rijndael's spec
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    for ($j = $this->Nk; $j < $this->Nb * ($this->Nr + 1); $j++) {    // For each word of expanded key
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      $temp = $expandedKey[$j - 1];
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      if ($j % $this->Nk == 0) 
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        $temp = ( ($this->SBox[($temp>>8) & 0xFF]) |
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                  ($this->SBox[($temp>>16) & 0xFF]<<8) |
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                  ($this->SBox[($temp>>24) & 0xFF]<<16) |
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                  ($this->SBox[$temp & 0xFF]<<24) ) ^ $this->Rcon[floor($j / $this->Nk) - 1];
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      elseif  ($this->Nk > 6 && $j % $this->Nk == 4)
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        $temp = ($this->SBox[($temp>>24) & 0xFF]<<24) |
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               ($this->SBox[($temp>>16) & 0xFF]<<16) |
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               ($this->SBox[($temp>>8) & 0xFF]<<8) |
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               ($this->SBox[ $temp & 0xFF]);
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      $expandedKey[$j] = $expandedKey[$j-$this->Nk] ^ $temp;
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    }
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    return $expandedKey;
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  }
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  // Rijndael's round functions... 
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  function RijndaelRound(&$state, $roundKey) {
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    $this->byteSub($state, "encrypt");
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    $this->shiftRow($state, "encrypt");
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    $this->mixColumn($state, "encrypt");
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    $this->addRoundKey($state, $roundKey);
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  }
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  function InverseRijndaelRound(&$state, $roundKey) {
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    $this->addRoundKey($state, $roundKey);
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    $this->mixColumn($state, "decrypt");
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    $this->shiftRow($state, "decrypt");
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    $this->byteSub($state, "decrypt");
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  }
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  function FinalRijndaelRound(&$state, $roundKey) {
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    $this->byteSub($state, "encrypt");
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    $this->shiftRow($state, "encrypt");
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    $this->addRoundKey($state, $roundKey);
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  }
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  function InverseFinalRijndaelRound(&$state, $roundKey){
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    $this->addRoundKey($state, $roundKey);
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    $this->shiftRow($state, "decrypt");
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    $this->byteSub($state, "decrypt");  
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  }
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   355
  
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  // encrypt is the basic encryption function. It takes parameters
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  // block, an array of bytes representing a plaintext block, and expandedKey,
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  // an array of words representing the expanded key previously returned by
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  // keyExpansion(). The ciphertext block is returned as an array of bytes.
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   361
  function cryptBlock($block, $expandedKey) {
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    //global $this->blockSizeInBits, $this->Nb, $this->Nr;
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   363
    $t=count($block)*8;
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   364
    if (!is_array($block) || count($block)*8 != $this->blockSizeInBits)
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   365
    {
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   366
      $this->trigger_error('block is bad or block size is wrong<pre>'.print_r($block, true).'</pre><p>Aiming for size '.$this->blockSizeInBits.', got '.$t.'.', E_USER_WARNING); 
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      return false;
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diff changeset
   368
    }
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diff changeset
   369
    if (!$expandedKey)
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diff changeset
   370
      return;
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diff changeset
   371
  
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   372
    $block = $this->packBytes($block);
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   373
    $this->addRoundKey($block, $expandedKey);
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    for ($i=1; $i<$this->Nr; $i++) 
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      $this->RijndaelRound($block, $this->array_slice_js_compat($expandedKey, $this->Nb*$i, $this->Nb*($i+1)));
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    $this->FinalRijndaelRound($block, $this->array_slice_js_compat($expandedKey, $this->Nb*$this->Nr));
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diff changeset
   377
    $ret = $this->unpackBytes($block);
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diff changeset
   378
    return $ret;
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diff changeset
   379
  }
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diff changeset
   380
  
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   381
  // decrypt is the basic decryption function. It takes parameters
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diff changeset
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  // block, an array of bytes representing a ciphertext block, and expandedKey,
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diff changeset
   383
  // an array of words representing the expanded key previously returned by
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diff changeset
   384
  // keyExpansion(). The decrypted block is returned as an array of bytes.
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diff changeset
   385
  
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diff changeset
   386
  function unCryptBlock($block, $expandedKey) {
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diff changeset
   387
    $t = count($block)*8;
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diff changeset
   388
    if (!is_array($block) || count($block)*8 != $this->blockSizeInBits)
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diff changeset
   389
    {
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diff changeset
   390
      $this->trigger_error('$block is not a valid rijndael-block array: '.$this->byteArrayToHex($block).'<pre>'.print_r($block, true).'</pre><p>Block size is '.$t.', should be '.$this->blockSizeInBits.'</p>', E_USER_WARNING);
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diff changeset
   391
      return false;
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diff changeset
   392
    }
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diff changeset
   393
    if (!$expandedKey)
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diff changeset
   394
    {
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diff changeset
   395
      $this->trigger_error('$expandedKey is invalid', E_USER_WARNING);
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diff changeset
   396
      return false;
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diff changeset
   397
    }
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diff changeset
   398
  
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parents:
diff changeset
   399
    $block = $this->packBytes($block);
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diff changeset
   400
    $this->InverseFinalRijndaelRound($block, $this->array_slice_js_compat($expandedKey, $this->Nb*$this->Nr)); 
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diff changeset
   401
    for ($i = $this->Nr - 1; $i>0; $i--) 
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parents:
diff changeset
   402
    {
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parents:
diff changeset
   403
      $this->InverseRijndaelRound($block, $this->array_slice_js_compat($expandedKey, $this->Nb*$i, $this->Nb*($i+1)));
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diff changeset
   404
    }
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diff changeset
   405
    $this->addRoundKey($block, $expandedKey);
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parents:
diff changeset
   406
    $ret = $this->unpackBytes($block);
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diff changeset
   407
    if(!is_array($ret))
fe660c52c48f Adding /includes
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parents:
diff changeset
   408
    {
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diff changeset
   409
      $this->trigger_error('$ret is not an array', E_USER_WARNING);
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parents:
diff changeset
   410
    }
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diff changeset
   411
    return $ret;
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diff changeset
   412
  }
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parents:
diff changeset
   413
  
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diff changeset
   414
  // This method takes a byte array (byteArray) and converts it to a string by
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   415
  // applying String.fromCharCode() to each value and concatenating the result.
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   416
  // The resulting string is returned. Note that this function SKIPS zero bytes
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   417
  // under the assumption that they are padding added in formatPlaintext().
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   418
  // Obviously, do not invoke this method on raw data that can contain zero
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   419
  // bytes. It is really only appropriate for printable ASCII/Latin-1 
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   420
  // values. Roll your own function for more robust functionality :)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   421
  
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   422
  function byteArrayToString($byteArray) {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   423
    $result = "";
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   424
    for($i=0; $i<count($byteArray); $i++)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   425
      if ($byteArray[$i] != 0) 
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   426
        $result .= chr($byteArray[$i]);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   427
    return $result;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   428
  }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   429
  
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   430
  // This function takes an array of bytes (byteArray) and converts them
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   431
  // to a hexadecimal string. Array element 0 is found at the beginning of 
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   432
  // the resulting string, high nibble first. Consecutive elements follow
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   433
  // similarly, for example [16, 255] --> "10ff". The function returns a 
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   434
  // string.
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   435
  
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   436
  /*
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   437
  function byteArrayToHex($byteArray) {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   438
    $result = "";
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   439
    if (!$byteArray)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   440
      return;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   441
    for ($i=0; $i<count($byteArray); $i++)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   442
      $result .= (($byteArray[$i]<16) ? "0" : "") + toString($byteArray[$i]); // magic number here is 16, not sure how to handle this...
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   443
  
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   444
    return $result;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   445
  }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   446
  */
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   447
  function byteArrayToHex($arr)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   448
  {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   449
    $ret = '';
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   450
    foreach($arr as $a)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   451
    {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   452
      $nibble = (string)dechex(intval($a));
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   453
      if(strlen($nibble) == 1) $nibble = '0' . $nibble;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   454
      $ret .= $nibble;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   455
    }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   456
    return $ret;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   457
  }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   458
  
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   459
  // PHP equivalent of Javascript's toString()
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   460
  function toString($bool)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   461
  {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   462
    if(is_bool($bool))
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   463
      return ($bool) ? 'true' : 'false';
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   464
    elseif(is_array($bool))
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   465
      return implode(',', $bool);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   466
    else
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   467
      return (string)$bool;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   468
  }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   469
  
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   470
  // This function converts a string containing hexadecimal digits to an 
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   471
  // array of bytes. The resulting byte array is filled in the order the
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   472
  // values occur in the string, for example "10FF" --> [16, 255]. This
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   473
  // function returns an array. 
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   474
  
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   475
  /*
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   476
  function hexToByteArray($hexString) {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   477
    $byteArray = Array();
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   478
    if (strlen($hexString) % 2)             // must have even length
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   479
      return;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   480
    if (strstr($hexString, "0x") == $hexString || strstr($hexString, "0X") == $hexString)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   481
      $hexString = substr($hexString, 2);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   482
    for ($i = 0; $i<strlen($hexString); $i++,$i++) 
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   483
      $byteArray[floor($i/2)] = intval(substr($hexString, $i, 2)); // again, that strange magic number: 16
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   484
    return $byteArray;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   485
  }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   486
  */
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   487
  function hexToByteArray($str)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   488
  {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   489
    if(substr($str, 0, 2) == '0x' || substr($str, 0, 2) == '0X')
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   490
      $str = substr($str, 2);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   491
    $arr = Array();
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   492
    $str = $this->enano_str_split($str, 2);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   493
    foreach($str as $s)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   494
    {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   495
      $arr[] = intval(hexdec($s));
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   496
    }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   497
    return $arr;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   498
  }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   499
  
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   500
  // This function packs an array of bytes into the four row form defined by
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   501
  // Rijndael. It assumes the length of the array of bytes is divisible by
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   502
  // four. Bytes are filled in according to the Rijndael spec (starting with
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   503
  // column 0, row 0 to 3). This function returns a 2d array.
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   504
  
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   505
  function packBytes($octets) {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   506
    $state = Array();
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   507
    if (!$octets || count($octets) % 4)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   508
      return;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   509
  
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   510
    $state[0] = Array(); $state[1] = Array(); 
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   511
    $state[2] = Array(); $state[3] = Array();
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   512
    for ($j=0; $j<count($octets); $j = $j+4) {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   513
       $state[0][$j/4] = $octets[$j];
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   514
       $state[1][$j/4] = $octets[$j+1];
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   515
       $state[2][$j/4] = $octets[$j+2];
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   516
       $state[3][$j/4] = $octets[$j+3];
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   517
    }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   518
    return $state;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   519
  }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   520
  
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   521
  // This function unpacks an array of bytes from the four row format preferred
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   522
  // by Rijndael into a single 1d array of bytes. It assumes the input "packed"
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   523
  // is a packed array. Bytes are filled in according to the Rijndael spec. 
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   524
  // This function returns a 1d array of bytes.
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   525
  
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   526
  function unpackBytes($packed) {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   527
    $result = Array();
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   528
    for ($j=0; $j<count($packed[0]); $j++) {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   529
      $result[] = $packed[0][$j];
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   530
      $result[] = $packed[1][$j];
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   531
      $result[] = $packed[2][$j];
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   532
      $result[] = $packed[3][$j];
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   533
    }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   534
    return $result;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   535
  }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   536
  
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   537
  function charCodeAt($str, $i)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   538
  {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   539
    return ord(substr($str, $i, 1));
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   540
  }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   541
  
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   542
  function fromCharCode($str)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   543
  {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   544
    return chr($str);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   545
  }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   546
  
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   547
  // This function takes a prospective plaintext (string or array of bytes)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   548
  // and pads it with zero bytes if its length is not a multiple of the block 
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   549
  // size. If plaintext is a string, it is converted to an array of bytes
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   550
  // in the process. The type checking can be made much nicer using the 
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   551
  // instanceof operator, but this operator is not available until IE5.0 so I 
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   552
  // chose to use the heuristic below. 
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   553
  
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   554
  function formatPlaintext($plaintext) {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   555
    //global $this->blockSizeInBits;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   556
    $bpb = $this->blockSizeInBits / 8;               // bytes per block
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   557
  
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   558
    // if primitive string or String instance
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   559
    if (is_string($plaintext)) {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   560
      $plaintext = $this->enano_str_split($plaintext);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   561
      // Unicode issues here (ignoring high byte)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   562
      for ($i=0; $i<sizeof($plaintext); $i++)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   563
        $plaintext[$i] = $this->charCodeAt($plaintext[$i], 0) & 0xFF;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   564
    } 
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   565
  
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   566
    for ($i = $bpb - (sizeof($plaintext) % $bpb); $i > 0 && $i < $bpb; $i--) 
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   567
      $plaintext[] = 0;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   568
    
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   569
    return $plaintext;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   570
  }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   571
  
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   572
  // Returns an array containing "howMany" random bytes. YOU SHOULD CHANGE THIS
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   573
  // TO RETURN HIGHER QUALITY RANDOM BYTES IF YOU ARE USING THIS FOR A "REAL"
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   574
  // APPLICATION. (edit: done, mt_rand() is relatively secure)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   575
  
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   576
  function getRandomBytes($howMany) {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   577
    $bytes = Array();
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   578
    for ($i=0; $i<$howMany; $i++)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   579
      $bytes[$i] = mt_rand(0, 255);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   580
    return $bytes;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   581
  }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   582
  
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   583
  // rijndaelEncrypt(plaintext, key, mode)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   584
  // Encrypts the plaintext using the given key and in the given mode. 
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   585
  // The parameter "plaintext" can either be a string or an array of bytes. 
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   586
  // The parameter "key" must be an array of key bytes. If you have a hex 
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   587
  // string representing the key, invoke hexToByteArray() on it to convert it 
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   588
  // to an array of bytes. The third parameter "mode" is a string indicating
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   589
  // the encryption mode to use, either "ECB" or "CBC". If the parameter is
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   590
  // omitted, ECB is assumed.
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   591
  // 
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   592
  // An array of bytes representing the cihpertext is returned. To convert 
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   593
  // this array to hex, invoke byteArrayToHex() on it. If you are using this 
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   594
  // "for real" it is a good idea to change the function getRandomBytes() to 
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   595
  // something that returns truly random bits.
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   596
  
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   597
  function rijndaelEncrypt($plaintext, $key, $mode = 'ECB') {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   598
    //global $this->blockSizeInBits, $this->keySizeInBits;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   599
    $bpb = $this->blockSizeInBits / 8;          // bytes per block
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   600
    // var ct;                                 // ciphertext
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   601
  
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   602
    if($mode == 'CBC')
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   603
    {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   604
      if (!is_string($plaintext) || !is_array($key))
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   605
      {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   606
        $this->trigger_error('In CBC mode the first and second parameters should be strings', E_USER_WARNING);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   607
        return false;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   608
      }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   609
    } else {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   610
      if (!is_array($plaintext) || !is_array($key))
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   611
      {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   612
        $this->trigger_error('In ECB mode the first and second parameters should be byte arrays', E_USER_WARNING);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   613
        return false;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   614
      }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   615
    }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   616
    if (sizeof($key)*8 != $this->keySizeInBits)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   617
    {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   618
      $this->trigger_error('The key needs to be '. ( $this->keySizeInBits / 8 ) .' bytes in length', E_USER_WARNING);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   619
      return false;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   620
    }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   621
    if ($mode == "CBC")
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   622
      $ct = $this->getRandomBytes($bpb);             // get IV
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   623
    else {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   624
      $mode = "ECB";
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   625
      $ct = Array();
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   626
    }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   627
    
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   628
    // convert plaintext to byte array and pad with zeros if necessary. 
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   629
    $plaintext = $this->formatPlaintext($plaintext);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   630
    
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   631
    $expandedKey = $this->keyExpansion($key);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   632
    
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   633
    for ($block=0; $block<sizeof($plaintext) / $bpb; $block++) {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   634
      $aBlock = $this->array_slice_js_compat($plaintext, $block*$bpb, ($block+1)*$bpb);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   635
      if ($mode == "CBC")
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   636
      {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   637
        for ($i=0; $i<$bpb; $i++)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   638
        {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   639
          $aBlock[$i] ^= $ct[$block*$bpb + $i];
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   640
        }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   641
      }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   642
      $cp = $this->cryptBlock($aBlock, $expandedKey);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   643
      $ct = $this->concat($ct, $cp);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   644
    }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   645
  
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   646
    return $ct;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   647
  }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   648
  
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   649
  // rijndaelDecrypt(ciphertext, key, mode)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   650
  // Decrypts the using the given key and mode. The parameter "ciphertext" 
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   651
  // must be an array of bytes. The parameter "key" must be an array of key 
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   652
  // bytes. If you have a hex string representing the ciphertext or key, 
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   653
  // invoke hexToByteArray() on it to convert it to an array of bytes. The
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   654
  // parameter "mode" is a string, either "CBC" or "ECB".
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   655
  // 
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   656
  // An array of bytes representing the plaintext is returned. To convert 
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   657
  // this array to a hex string, invoke byteArrayToHex() on it. To convert it 
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   658
  // to a string of characters, you can use byteArrayToString().
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   659
  
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   660
  function rijndaelDecrypt($ciphertext, $key, $mode = 'ECB') {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   661
    //global $this->blockSizeInBits, $this->keySizeInBits;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   662
    $bpb = $this->blockSizeInBits / 8;          // bytes per block
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   663
    $pt = Array();                   // plaintext array
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   664
    // $aBlock;                             // a decrypted block
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   665
    // $block;                              // current block number
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   666
  
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   667
    if (!$ciphertext)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   668
    {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   669
      $this->trigger_error('$ciphertext should be a byte array', E_USER_WARNING);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   670
      return false;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   671
    }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   672
    if(  !is_array($key) )
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   673
    {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   674
      $this->trigger_error('$key should be a byte array', E_USER_WARNING);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   675
      return false;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   676
    }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   677
    if( is_string($ciphertext) )
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   678
    {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   679
      $this->trigger_error('$ciphertext should be a byte array', E_USER_WARNING);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   680
      return false;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   681
    }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   682
    if (sizeof($key)*8 != $this->keySizeInBits)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   683
    {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   684
      $this->trigger_error('Encryption key is the wrong length', E_USER_WARNING);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   685
      return false;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   686
    }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   687
    if (!$mode)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   688
      $mode = "ECB";                         // assume ECB if mode omitted
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   689
  
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   690
    $expandedKey = $this->keyExpansion($key);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   691
   
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   692
    // work backwards to accomodate CBC mode 
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   693
    for ($block=(sizeof($ciphertext) / $bpb)-1; $block>0; $block--)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   694
    {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   695
      if( ( $block*$bpb ) + ( ($block+1)*$bpb ) > count($ciphertext) )
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   696
      {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   697
        //$this->trigger_error('$ciphertext index out of bounds', E_USER_ERROR);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   698
      }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   699
      $current_block = $this->array_slice_js_compat($ciphertext, $block*$bpb, ($block+1)*$bpb);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   700
      if(count($current_block) * 8 != $this->blockSizeInBits)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   701
      {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   702
        // $c=count($current_block)*8;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   703
        // $this->trigger_error('We got a '.$c.'-bit block, instead of '.$this->blockSizeInBits.'', E_USER_ERROR);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   704
      }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   705
      $aBlock = $this->uncryptBlock($current_block, $expandedKey);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   706
      if(!$aBlock)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   707
      {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   708
        $this->trigger_error('Shared block decryption routine returned false', E_USER_WARNING);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   709
        return false;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   710
      }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   711
      if ($mode == "CBC")
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   712
        for ($i=0; $i<$bpb; $i++) 
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   713
          $pt[($block-1)*$bpb + $i] = $aBlock[$i] ^ $ciphertext[($block-1)*$bpb + $i];
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   714
      else
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   715
        $pt = $this->concat($aBlock, $pt);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   716
    }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   717
  
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   718
    // do last block if ECB (skips the IV in CBC)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   719
    if ($mode == "ECB")
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   720
    {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   721
      $x = $this->uncryptBlock($this->array_slice_js_compat($ciphertext, 0, $bpb), $expandedKey);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   722
      if(!$x)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   723
      {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   724
        $this->trigger_error('ECB block decryption routine returned false', E_USER_WARNING);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   725
        return false;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   726
      }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   727
      $pt = $this->concat($x, $pt);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   728
      if(!$pt)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   729
      {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   730
        $this->trigger_error('ECB concatenation routine returned false', E_USER_WARNING);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   731
        return false;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   732
      }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   733
    }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   734
  
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   735
    return $pt;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   736
  }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   737
  
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   738
  /**
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   739
   * Wrapper for encryption.
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   740
   * @param string $text the text to encrypt
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   741
   * @param string $key the raw binary key to encrypt with
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   742
   * @param int $return_encoding optional - can be ENC_BINARY, ENC_HEX or ENC_BASE64
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   743
   */
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   744
   
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   745
  function encrypt($text, $key, $return_encoding = ENC_HEX)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   746
  {
54
84b56303cab5 Bugfixes: Login system properly handles blank password situation (returns ""); fading button now works right with relative URLs
Dan
parents: 45
diff changeset
   747
    if ( $text == '' )
84b56303cab5 Bugfixes: Login system properly handles blank password situation (returns ""); fading button now works right with relative URLs
Dan
parents: 45
diff changeset
   748
      return '';
1
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   749
    if ( $this->mcrypt && $this->blockSizeInBits == mcrypt_module_get_algo_block_size(eval('return MCRYPT_RIJNDAEL_'.$this->keySizeInBits.';')) )
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   750
    {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   751
      $iv_size = mcrypt_get_iv_size($this->mcrypt, MCRYPT_MODE_ECB);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   752
      $iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   753
      $cryptext = mcrypt_encrypt($this->mcrypt, $key, $text, MCRYPT_MODE_ECB, $iv);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   754
      switch($return_encoding)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   755
      {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   756
        case ENC_HEX:
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   757
        default:
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   758
          $cryptext = $this->strtohex($cryptext);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   759
          break;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   760
        case ENC_BINARY:
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   761
          $cryptext = $cryptext;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   762
          break;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   763
        case ENC_BASE64:
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   764
          $cryptext = base64_encode($cryptext);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   765
          break;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   766
      }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   767
    }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   768
    else
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   769
    {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   770
      $key = $this->prepare_string($key);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   771
      $text = $this->prepare_string($text);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   772
      $cryptext = $this->rijndaelEncrypt($text, $key, 'ECB');
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   773
      if(!is_array($cryptext))
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   774
      {
42
45ebe475ff75 I dunno how many times I'm gonna have to fix the "problem seems to be the hex conversion" bug, but this is at least the fourth try.
Dan
parents: 40
diff changeset
   775
        echo 'Warning: encryption failed for string: '.print_r($text,true).'<br />';
1
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   776
        return false;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   777
      }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   778
      switch($return_encoding)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   779
      {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   780
        case ENC_HEX:
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   781
        default:
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   782
          $cryptext = $this->byteArrayToHex($cryptext);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   783
          break;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   784
        case ENC_BINARY:
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   785
          $cryptext = $this->byteArrayToString($cryptext);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   786
          break;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   787
        case ENC_BASE64:
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   788
          $cryptext = base64_encode($this->byteArrayToString($cryptext));
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   789
          break;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   790
      }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   791
    }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   792
    return $cryptext;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   793
  }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   794
  
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   795
  /**
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   796
   * Wrapper for decryption.
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   797
   * @param string $text the encrypted text
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   798
   * @param string $key the raw binary key used to encrypt the text
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   799
   * @param int $input_encoding the encoding used for the encrypted string. Can be ENC_BINARY, ENC_HEX, or ENC_BASE64.
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   800
   * @return string
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   801
   */
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   802
   
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   803
  function decrypt($text, $key, $input_encoding = ENC_HEX)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   804
  {
54
84b56303cab5 Bugfixes: Login system properly handles blank password situation (returns ""); fading button now works right with relative URLs
Dan
parents: 45
diff changeset
   805
    if ( $text == '' )
84b56303cab5 Bugfixes: Login system properly handles blank password situation (returns ""); fading button now works right with relative URLs
Dan
parents: 45
diff changeset
   806
      return '';
1
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   807
    switch($input_encoding)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   808
    {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   809
      case ENC_BINARY:
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   810
      default:
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   811
        break;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   812
      case ENC_HEX:
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   813
        $text = $this->hextostring($text);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   814
        break;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   815
      case ENC_BASE64:
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   816
        $text = base64_decode($text);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   817
        break;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   818
    }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   819
    //$mod = strlen($text) % $this->blockSizeInBits;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   820
    //if($mod != 96)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   821
      //die('modulus check failed: '.$mod);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   822
    if ( $this->mcrypt )
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   823
    {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   824
      $iv_size = mcrypt_get_iv_size($this->mcrypt, MCRYPT_MODE_ECB);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   825
      $iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   826
      $dypt = mcrypt_decrypt($this->mcrypt, $key, $text, MCRYPT_MODE_ECB, $iv);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   827
    }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   828
    else
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   829
    {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   830
      $etext = $this->prepare_string($text);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   831
      $ekey  = $this->prepare_string($key);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   832
      $mod = count($etext) % $this->blockSizeInBits;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   833
      $dypt = $this->rijndaelDecrypt($etext, $ekey, 'ECB');
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   834
      if(!$dypt)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   835
      {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   836
        echo '<pre>'.print_r($dypt, true).'</pre>';
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   837
        $this->trigger_error('Rijndael main decryption routine failed', E_USER_ERROR);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   838
      }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   839
      $dypt = $this->byteArrayToString($dypt);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   840
    }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   841
    return $dypt;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   842
  }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   843
  
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   844
  /**
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   845
   * Enano-ese equivalent of str_split() which is only found in PHP5
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   846
   * @param $text string the text to split
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   847
   * @param $inc int size of each block
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   848
   * @return array
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   849
   */
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   850
   
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   851
  function enano_str_split($text, $inc = 1)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   852
  {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   853
    if($inc < 1) return false;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   854
    if($inc >= strlen($text)) return Array($text);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   855
    $len = ceil(strlen($text) / $inc);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   856
    $ret = Array();
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   857
    for($i=0;$i<strlen($text);$i=$i+$inc)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   858
    {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   859
      $ret[] = substr($text, $i, $inc);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   860
    }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   861
    return $ret;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   862
  }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   863
  
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   864
  /**
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   865
   * Generates a random key suitable for encryption
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   866
   * @param int $len the length of the key, in bytes
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   867
   * @return string a BINARY key
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   868
   */
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   869
  
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   870
  function randkey($len = 32)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   871
  {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   872
    $key = '';
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   873
    for($i=0;$i<$len;$i++)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   874
    {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   875
      $key .= chr(mt_rand(0, 255));
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   876
    }
44
90b557e7f12c $aes->gen_readymade_key() now uses /dev/urandom when possible
Dan
parents: 42
diff changeset
   877
    if ( file_exists('/dev/urandom') && is_readable('/dev/urandom') )
90b557e7f12c $aes->gen_readymade_key() now uses /dev/urandom when possible
Dan
parents: 42
diff changeset
   878
    {
90b557e7f12c $aes->gen_readymade_key() now uses /dev/urandom when possible
Dan
parents: 42
diff changeset
   879
      // Let's use something a little more secure
90b557e7f12c $aes->gen_readymade_key() now uses /dev/urandom when possible
Dan
parents: 42
diff changeset
   880
      $ur = @fopen('/dev/urandom', 'r');
90b557e7f12c $aes->gen_readymade_key() now uses /dev/urandom when possible
Dan
parents: 42
diff changeset
   881
      if ( !$ur )
90b557e7f12c $aes->gen_readymade_key() now uses /dev/urandom when possible
Dan
parents: 42
diff changeset
   882
        return $key;
90b557e7f12c $aes->gen_readymade_key() now uses /dev/urandom when possible
Dan
parents: 42
diff changeset
   883
      $ukey = @fread($ur, $len);
45
9cb99e37bfc4 Oops - memory leak in urandom reader
Dan
parents: 44
diff changeset
   884
      fclose($ur);
44
90b557e7f12c $aes->gen_readymade_key() now uses /dev/urandom when possible
Dan
parents: 42
diff changeset
   885
      if ( strlen($ukey) != $len )
90b557e7f12c $aes->gen_readymade_key() now uses /dev/urandom when possible
Dan
parents: 42
diff changeset
   886
        return $key;
90b557e7f12c $aes->gen_readymade_key() now uses /dev/urandom when possible
Dan
parents: 42
diff changeset
   887
      return $ukey;
90b557e7f12c $aes->gen_readymade_key() now uses /dev/urandom when possible
Dan
parents: 42
diff changeset
   888
    }
1
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   889
    return $key;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   890
  }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   891
  
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   892
  /*
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   893
  function byteArrayToString($arr)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   894
  {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   895
    if(!is_array($arr))
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   896
    {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   897
      $this->trigger_error('First parameter should be an array', E_USER_WARNING);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   898
      return false;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   899
    }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   900
    $ret = '';
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   901
    foreach($arr as $a)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   902
    {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   903
      if($a != 0) $ret .= chr($a);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   904
    }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   905
    return $ret;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   906
  }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   907
  */
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   908
  
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   909
  function strtohex($str)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   910
  {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   911
    $str = $this->enano_str_split($str);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   912
    $ret = '';
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   913
    foreach($str as $s)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   914
    {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   915
      $chr = dechex(ord($s));
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   916
      if(strlen($chr) < 2) $chr = '0' . $chr;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   917
      $ret .= $chr;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   918
    }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   919
    return $ret;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   920
  }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   921
  
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   922
  function gen_readymade_key()
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   923
  {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   924
    $key = $this->strtohex($this->randkey($this->keySizeInBits / 8));
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   925
    return $key;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   926
  }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   927
  
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   928
  function prepare_string($text)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   929
  {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   930
    $ret = $this->hexToByteArray($this->strtohex($text));
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   931
    if(count($ret) != strlen($text))
40
723bb7acf914 Fixed a lot of bugs with Safari and Konqueror; improved Opera compatibility
Dan
parents: 1
diff changeset
   932
    {
723bb7acf914 Fixed a lot of bugs with Safari and Konqueror; improved Opera compatibility
Dan
parents: 1
diff changeset
   933
      die('Could not convert string "' . $text . '" to hex byte array for encryption');
723bb7acf914 Fixed a lot of bugs with Safari and Konqueror; improved Opera compatibility
Dan
parents: 1
diff changeset
   934
    }
1
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   935
    return $ret;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   936
  }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   937
  
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   938
  /**
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   939
   * Decodes a hex string.
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   940
   * @param string $hex The hex code to decode
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   941
   * @return string
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   942
   */
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   943
  
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   944
  function hextostring($hex)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   945
  {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   946
    $hex = $this->enano_str_split($hex, 2);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   947
    $bin_key = '';
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   948
    foreach($hex as $nibble)
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   949
    {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   950
      $byte = chr(hexdec($nibble));
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   951
      $bin_key .= $byte;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   952
    }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   953
    return $bin_key;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   954
  }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   955
}
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   956
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   957
/**
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   958
 * XXTEA encryption arithmetic library.
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   959
 *
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   960
 * Copyright (C) 2006 Ma Bingyao <andot@ujn.edu.cn>
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   961
 * Version:      1.5
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   962
 * LastModified: Dec 5, 2006
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   963
 * This library is free.  You can redistribute it and/or modify it.
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   964
 * 
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   965
 * From dandaman32: I am treating this code as GPL, as implied by the license statement above.
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   966
 */
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   967
class TEACrypt extends AESCrypt {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   968
  function long2str($v, $w) {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   969
      $len = count($v);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   970
      $n = ($len - 1) << 2;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   971
      if ($w) {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   972
          $m = $v[$len - 1];
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   973
          if (($m < $n - 3) || ($m > $n)) return false;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   974
          $n = $m;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   975
      }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   976
      $s = array();
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   977
      for ($i = 0; $i < $len; $i++) {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   978
          $s[$i] = pack("V", $v[$i]);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   979
      }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   980
      if ($w) {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   981
          return substr(join('', $s), 0, $n);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   982
      }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   983
      else {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   984
          return join('', $s);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   985
      }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   986
  }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   987
   
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   988
  function str2long($s, $w) {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   989
      $v = unpack("V*", $s. str_repeat("\0", (4 - strlen($s) % 4) & 3));
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   990
      $v = array_values($v);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   991
      if ($w) {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   992
          $v[count($v)] = strlen($s);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   993
      }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   994
      return $v;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   995
  }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   996
   
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   997
  function int32($n) {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   998
      while ($n >= 2147483648) $n -= 4294967296;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
   999
      while ($n <= -2147483649) $n += 4294967296;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1000
      return (int)$n;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1001
  }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1002
   
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1003
  function encrypt($str, $key) {
54
84b56303cab5 Bugfixes: Login system properly handles blank password situation (returns ""); fading button now works right with relative URLs
Dan
parents: 45
diff changeset
  1004
      if ($str == "")
84b56303cab5 Bugfixes: Login system properly handles blank password situation (returns ""); fading button now works right with relative URLs
Dan
parents: 45
diff changeset
  1005
      {
1
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1006
          return "";
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1007
      }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1008
      $v = $this->str2long($str, true);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1009
      $k = $this->str2long($key, false);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1010
      if (count($k) < 4) {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1011
          for ($i = count($k); $i < 4; $i++) {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1012
              $k[$i] = 0;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1013
          }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1014
      }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1015
      $n = count($v) - 1;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1016
   
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1017
      $z = $v[$n];
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1018
      $y = $v[0];
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1019
      $delta = 0x9E3779B9;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1020
      $q = floor(6 + 52 / ($n + 1));
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1021
      $sum = 0;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1022
      while (0 < $q--) {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1023
          $sum = $this->int32($sum + $delta);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1024
          $e = $sum >> 2 & 3;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1025
          for ($p = 0; $p < $n; $p++) {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1026
              $y = $v[$p + 1];
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1027
              $mx = $this->int32((($z >> 5 & 0x07ffffff) ^ $y << 2) + (($y >> 3 & 0x1fffffff) ^ $z << 4)) ^ $this->int32(($sum ^ $y) + ($k[$p & 3 ^ $e] ^ $z));
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1028
              $z = $v[$p] = $this->int32($v[$p] + $mx);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1029
          }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1030
          $y = $v[0];
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1031
          $mx = $this->int32((($z >> 5 & 0x07ffffff) ^ $y << 2) + (($y >> 3 & 0x1fffffff) ^ $z << 4)) ^ $this->int32(($sum ^ $y) + ($k[$p & 3 ^ $e] ^ $z));
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1032
          $z = $v[$n] = $this->int32($v[$n] + $mx);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1033
      }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1034
      return $this->long2str($v, false);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1035
  }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1036
   
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1037
  function decrypt($str, $key) {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1038
      if ($str == "") {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1039
          return "";
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1040
      }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1041
      $v = $this->str2long($str, false);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1042
      $k = $this->str2long($key, false);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1043
      if (count($k) < 4) {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1044
          for ($i = count($k); $i < 4; $i++) {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1045
              $k[$i] = 0;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1046
          }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1047
      }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1048
      $n = count($v) - 1;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1049
   
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1050
      $z = $v[$n];
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1051
      $y = $v[0];
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1052
      $delta = 0x9E3779B9;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1053
      $q = floor(6 + 52 / ($n + 1));
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1054
      $sum = $this->int32($q * $delta);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1055
      while ($sum != 0) {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1056
          $e = $sum >> 2 & 3;
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1057
          for ($p = $n; $p > 0; $p--) {
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1058
              $z = $v[$p - 1];
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1059
              $mx = $this->int32((($z >> 5 & 0x07ffffff) ^ $y << 2) + (($y >> 3 & 0x1fffffff) ^ $z << 4)) ^ $this->int32(($sum ^ $y) + ($k[$p & 3 ^ $e] ^ $z));
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1060
              $y = $v[$p] = $this->int32($v[$p] - $mx);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1061
          }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1062
          $z = $v[$n];
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1063
          $mx = $this->int32((($z >> 5 & 0x07ffffff) ^ $y << 2) + (($y >> 3 & 0x1fffffff) ^ $z << 4)) ^ $this->int32(($sum ^ $y) + ($k[$p & 3 ^ $e] ^ $z));
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1064
          $y = $v[0] = $this->int32($v[0] - $mx);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1065
          $sum = $this->int32($sum - $delta);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1066
      }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1067
      return $this->long2str($v, true);
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1068
  }
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1069
}
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1070
fe660c52c48f Adding /includes
dan@scribus.fuhry.local.fuhry.local
parents:
diff changeset
  1071
?>