includes/diffiehellman.php
author Dan
Sat, 01 Mar 2008 18:55:54 -0500
changeset 466 1cc8a038ad20
parent 436 242353360e37
child 467 e4bbd6fb8df3
permissions -rw-r--r--
Fixed improper serializing of IP that could allow reusing of key from multiple IP addresses.
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
436
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
     1
<?php
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
     2
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
     3
/*
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
     4
 * Enano - an open-source CMS capable of wiki functions, Drupal-like sidebar blocks, and everything in between
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
     5
 * Version 1.1.2 (Caoineag alpha 2)
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
     6
 * Copyright (C) 2006-2007 Dan Fuhry
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
     7
 * diffiehellman.php - Diffie Hellman key exchange and supporting functions
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
     8
 *
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
     9
 * This program is Free Software; you can redistribute and/or modify it under the terms of the GNU General Public License
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    10
 * as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    11
 *
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    12
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    13
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for details.
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    14
 */
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    15
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    16
/**
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    17
 * Class to handle math operations that require the use of >32-bit integers.
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    18
 */
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    19
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    20
class EnanoMath
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    21
{
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    22
  
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    23
  var $api = 'gmp';
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    24
  var $limb = 16;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    25
  
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    26
  function __construct()
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    27
  {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    28
    /*
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    29
    // big_int support is untested.
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    30
    if ( extension_loaded('big_int') )
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    31
    {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    32
      $this->api = 'bigint';
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    33
    }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    34
    else
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    35
    */
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    36
    if ( function_exists('gmp_init') )
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    37
    {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    38
      $this->api = 'gmp';
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    39
    }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    40
    else if ( function_exists('bcpow') )
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    41
    {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    42
      $this->api = 'bcmath';
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    43
    }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    44
    else
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    45
    {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    46
      throw new Exception('dh_err_not_supported');
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    47
    }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    48
  }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    49
  
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    50
  function powmod($base, $pow, $mod)
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    51
  {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    52
    switch($this->api)
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    53
    {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    54
      case 'bigint':
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    55
        return ( pow($base, $pow) % $mod );
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    56
        break;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    57
      case 'gmp':
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    58
        return ( function_exists('gmp_powm') ) ? gmp_powm($base, $pow, $mod) : gmp_mod(gmp_pow($base, $pow), $mod);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    59
        break;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    60
      case 'bcmath':
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    61
        return ( function_exists('bcpowmod') ) ? bcpowmod($base, $pow, $mod) : bcmod( bcpow($base, $pow), $mod );
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    62
        break;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    63
    }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    64
  }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    65
  
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    66
  function random($len)
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    67
  {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    68
    switch($this->api)
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    69
    {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    70
      case 'gmp':
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    71
        return gmp_random($len);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    72
        break;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    73
      case 'bcmath':
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    74
        return $this->_bcmath_random($len);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    75
        break;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    76
      case 'bigint':
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    77
        return $this->_bigint_random($len);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    78
        break;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    79
    }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    80
  }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    81
  
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    82
  function _bcmath_random($len)
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    83
  {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    84
    $len = ( $this->limb / 2 ) * $len;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    85
    $chars = '0123456789abcdef';
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    86
    $ret = '';
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    87
    for ( $i = 0; $i < $len; $i++ )
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    88
    {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    89
      $chid = mt_rand ( 0, strlen($chars) - 1 );
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    90
      $chr = $chars{$chid};
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    91
      $ret .= $chr;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    92
    }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    93
    return $this->basecon($ret, 16, 10);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    94
  }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    95
  
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    96
  function _bigint_random($len)
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    97
  {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    98
    $len = ( $this->limb / 2 ) * $len;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    99
    $chars = '0123456789abcdef';
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   100
    $ret = '';
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   101
    for ( $i = 0; $i < $len; $i++ )
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   102
    {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   103
      $chid = mt_rand ( 0, strlen($chars) - 1 );
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   104
      $chr = $chars{$chid};
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   105
      $ret .= $chr;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   106
    }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   107
    return $this->basecon($ret, 16, 10);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   108
  }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   109
  
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   110
  function basecon($int, $from, $to)
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   111
  {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   112
    switch($this->api)
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   113
    {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   114
      case 'gmp':
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   115
        return gmp_strval(gmp_init($int, $from), $to);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   116
        break;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   117
      case 'bcmath':
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   118
        return $this->_bcmath_baseconv($int, $from, $to);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   119
        break;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   120
      case 'bigint':
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   121
        return base_convert($int, $from, $to);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   122
        break;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   123
    }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   124
  }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   125
  
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   126
  function str($res, $base = 10)
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   127
  {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   128
    switch($this->api)
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   129
    {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   130
      case 'bigint':
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   131
      case 'bcmath':
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   132
        return strval($this->basecon($res, 10, $base));
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   133
        break;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   134
      case 'gmp':
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   135
        return gmp_strval($res, $base);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   136
        break;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   137
    }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   138
  }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   139
  
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   140
  function compare($v1, $v2)
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   141
  {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   142
    switch($this->api)
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   143
    {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   144
      case 'bigint':
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   145
        return ( $v1 === $v2 );
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   146
        break;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   147
      case 'bcmath':
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   148
        return ( bccomp($v1, $v2) === 0 );
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   149
        break;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   150
      case 'gmp':
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   151
        return ( gmp_cmp($v1, $v2) === 0 );
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   152
        break;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   153
    }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   154
  }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   155
  
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   156
  function _bcmath_baseconv($int, $from, $to)
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   157
  {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   158
    if ( $from != 10 )
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   159
      $int = $this->_bcmath_base2dec($int, $from);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   160
    if ( $to != 10 )
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   161
      $int = $this->_bcmath_dec2base($int, $to);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   162
    return $int;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   163
  }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   164
  
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   165
  // from us.php.net/bc:
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   166
  // convert a decimal value to any other base value
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   167
  function _bcmath_dec2base($dec,$base,$digits=FALSE) {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   168
      if($base<2 or $base>256) die("Invalid Base: ".$base);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   169
      bcscale(0);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   170
      $value="";
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   171
      if(!$digits) $digits=$this->_bcmath_digits($base);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   172
      while($dec>$base-1) {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   173
          $rest=bcmod($dec,$base);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   174
          $dec=bcdiv($dec,$base);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   175
          $value=$digits[$rest].$value;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   176
      }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   177
      $value=$digits[intval($dec)].$value;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   178
      return (string) $value;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   179
  }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   180
  
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   181
  // convert another base value to its decimal value
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   182
  function _bcmath_base2dec($value,$base,$digits=FALSE) {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   183
      if($base<2 or $base>256) die("Invalid Base: ".$base);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   184
      bcscale(0);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   185
      if($base<37) $value=strtolower($value);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   186
      if(!$digits) $digits=$this->_bcmath_digits($base);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   187
      $size=strlen($value);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   188
      $dec="0";
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   189
      for($loop=0;$loop<$size;$loop++) {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   190
          $element=strpos($digits,$value[$loop]);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   191
          $power=bcpow($base,$size-$loop-1);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   192
          $dec=bcadd($dec,bcmul($element,$power));
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   193
      }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   194
      return (string) $dec;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   195
  }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   196
  
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   197
  function _bcmath_digits($base) {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   198
      if($base>64) {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   199
          $digits="";
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   200
          for($loop=0;$loop<256;$loop++) {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   201
              $digits.=chr($loop);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   202
          }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   203
      } else {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   204
          $digits ="0123456789abcdefghijklmnopqrstuvwxyz";
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   205
          $digits.="ABCDEFGHIJKLMNOPQRSTUVWXYZ-_";
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   206
      }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   207
      $digits=substr($digits,0,$base);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   208
      return (string) $digits;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   209
  }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   210
}
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   211
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   212
/**
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   213
 * The Diffie-Hellman key exchange protocol
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   214
 */
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   215
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   216
$GLOBALS['_math'] = new EnanoMath();
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   217
// Our prime number as a base for operations.
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   218
$GLOBALS['dh_prime'] = '82818079787776757473727170696867666564636261605958575655545352515049484746454443424140393837363534333231302928272625242322212019181716151413121110987654321';
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   219
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   220
// g, a primitive root used as an exponent
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   221
// (2 and 5 are acceptable, but BigInt is faster with odd numbers)
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   222
$GLOBALS['dh_g'] = '5';
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   223
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   224
/**
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   225
 * Generates a Diffie-Hellman private key
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   226
 * @return string(BigInt)
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   227
 */
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   228
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   229
function dh_gen_private()
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   230
{
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   231
  global $_math;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   232
  return $_math->random(256);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   233
}
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   234
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   235
/**
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   236
 * Calculates the public key from the private key
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   237
 * @param string(BigInt)
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   238
 * @return string(BigInt)
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   239
 */
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   240
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   241
function dh_gen_public($b)
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   242
{
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   243
  global $_math, $dh_g, $dh_prime;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   244
  return $_math->powmod($dh_g, $b, $dh_prime);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   245
}
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   246
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   247
/**
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   248
 * Calculates the shared secret.
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   249
 * @param string(BigInt) Our private key
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   250
 * @param string(BigInt) Remote party's public key
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   251
 * @return string(BigInt)
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   252
 */
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   253
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   254
function dh_gen_shared_secret($a, $B)
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   255
{
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   256
  global $_math, $dh_g, $dh_prime;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   257
  return $_math->powmod($B, $a, $dh_prime);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   258
}
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   259
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   260
/*
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   261
SHA-256 algorithm - ported from Javascript
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   262
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   263
Copyright (c) 2003-2004, Angel Marin
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   264
All rights reserved.
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   265
Portions copyright (c) 2008 Dan Fuhry.
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   266
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   267
Redistribution and use in source and binary forms, with or without modification,
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   268
are permitted provided that the following conditions are met:
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   269
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   270
 * Redistributions of source code must retain the above copyright notice, this
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   271
   list of conditions and the following disclaimer.
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   272
 * Redistributions in binary form must reproduce the above copyright notice,
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   273
   this list of conditions and the following disclaimer in the documentation
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   274
   and/or other materials provided with the distribution.
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   275
 * Neither the name of the <ORGANIZATION> nor the names of its contributors may
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   276
   be used to endorse or promote products derived from this software without
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   277
   specific prior written permission.
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   278
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   279
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   280
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   281
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   282
IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   283
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   284
BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   285
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   286
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   287
OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   288
OF THE POSSIBILITY OF SUCH DAMAGE.
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   289
*/
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   290
class SHA256
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   291
{
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   292
  var $chrsz = 8;  /* bits per input character. 8 - ASCII; 16 - Unicode  */
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   293
  
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   294
  function safe_add ($x, $y) {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   295
    $lsw = ($x & 0xFFFF) + ($y & 0xFFFF);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   296
    $msw = ($x >> 16) + ($y >> 16) + ($lsw >> 16);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   297
    return ($msw << 16) | ($lsw & 0xFFFF);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   298
  }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   299
  function rshz($X, $n)
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   300
  {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   301
    // equivalent to $X >>> $n in javascript
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   302
    // pulled from http://www.tapouillo.com/firefox_extension/sourcecode.txt, public domain
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   303
    $z = hexdec(80000000); 
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   304
    if ($z & $X) 
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   305
    { 
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   306
        $X = ($X>>1); 
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   307
        $X &= (~$z); 
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   308
        $X |= 0x40000000; 
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   309
        $X = ($X>>($n-1)); 
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   310
    } 
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   311
    else 
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   312
    { 
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   313
        $X = ($X>>$n); 
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   314
    } 
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   315
    return $X; 
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   316
  }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   317
  function S ($X, $n) {return ( $this->rshz($X, $n) ) | ($X << (32 - $n));}
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   318
  function R ($X, $n) {return ( $this->rshz($X, $n) );}
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   319
  function Ch($x, $y, $z)  {return (($x & $y) ^ ((~$x) & $z));}
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   320
  function Maj($x, $y, $z) {return (($x & $y) ^ ($x & $z) ^ ($y & $z));}
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   321
  function Sigma0256($x) {return ($this->S($x, 2)  ^ $this->S($x, 13) ^ $this->S($x, 22));}
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   322
  function Sigma1256($x) {return ($this->S($x, 6)  ^ $this->S($x, 11) ^ $this->S($x, 25));}
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   323
  function Gamma0256($x) {return ($this->S($x, 7)  ^ $this->S($x, 18) ^ $this->R($x, 3));}
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   324
  function Gamma1256($x) {return ($this->S($x, 17) ^ $this->S($x, 19) ^ $this->R($x, 10));}
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   325
  function core_sha256 ($m, $l) {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   326
      $K = Array(0x428A2F98,0x71374491,0xB5C0FBCF,0xE9B5DBA5,0x3956C25B,0x59F111F1,0x923F82A4,0xAB1C5ED5,0xD807AA98,0x12835B01,0x243185BE,0x550C7DC3,0x72BE5D74,0x80DEB1FE,0x9BDC06A7,0xC19BF174,0xE49B69C1,0xEFBE4786,0xFC19DC6,0x240CA1CC,0x2DE92C6F,0x4A7484AA,0x5CB0A9DC,0x76F988DA,0x983E5152,0xA831C66D,0xB00327C8,0xBF597FC7,0xC6E00BF3,0xD5A79147,0x6CA6351,0x14292967,0x27B70A85,0x2E1B2138,0x4D2C6DFC,0x53380D13,0x650A7354,0x766A0ABB,0x81C2C92E,0x92722C85,0xA2BFE8A1,0xA81A664B,0xC24B8B70,0xC76C51A3,0xD192E819,0xD6990624,0xF40E3585,0x106AA070,0x19A4C116,0x1E376C08,0x2748774C,0x34B0BCB5,0x391C0CB3,0x4ED8AA4A,0x5B9CCA4F,0x682E6FF3,0x748F82EE,0x78A5636F,0x84C87814,0x8CC70208,0x90BEFFFA,0xA4506CEB,0xBEF9A3F7,0xC67178F2);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   327
      $HASH = Array(0x6A09E667, 0xBB67AE85, 0x3C6EF372, 0xA54FF53A, 0x510E527F, 0x9B05688C, 0x1F83D9AB, 0x5BE0CD19);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   328
      $W = Array(64);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   329
      /* append padding */
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   330
      $m[$l >> 5] |= 0x80 << (24 - $l % 32);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   331
      $m[(($l + 64 >> 9) << 4) + 15] = $l;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   332
      for ( $i = 0; $i<count($m); $i+=16 ) {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   333
          $a = $HASH[0];
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   334
          $b = $HASH[1];
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   335
          $c = $HASH[2];
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   336
          $d = $HASH[3];
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   337
          $e = $HASH[4];
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   338
          $f = $HASH[5];
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   339
          $g = $HASH[6];
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   340
          $h = $HASH[7];
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   341
          for ( $j = 0; $j<64; $j++)
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   342
          {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   343
              if ( $j < 16 )
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   344
              {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   345
                $W[$j] = ( isset($m[$j + $i]) ) ? $m[$j + $i] : 0;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   346
              }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   347
              else
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   348
              {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   349
                $W[$j] = $this->safe_add(
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   350
                  $this->safe_add(
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   351
                    $this->safe_add(
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   352
                      $this->Gamma1256($W[$j - 2]), $W[$j - 7]),
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   353
                    $this->Gamma0256($W[$j - 15])),
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   354
                  $W[$j - 16]);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   355
              }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   356
              $T1 = $this->safe_add(
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   357
                $this->safe_add(
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   358
                  $this->safe_add(
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   359
                    $this->safe_add($h, $this->Sigma1256($e)
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   360
                      ),
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   361
                    $this->Ch($e, $f, $g)),
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   362
                  $K[$j]),
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   363
                $W[$j]);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   364
              $T2 = $this->safe_add($this->Sigma0256($a), $this->Maj($a, $b, $c));
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   365
              $h = $g;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   366
              $g = $f;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   367
              $f = $e;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   368
              $e = $this->safe_add($d, $T1);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   369
              $d = $c;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   370
              $c = $b;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   371
              $b = $a;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   372
              $a = $this->safe_add($T1, $T2);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   373
          }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   374
          $HASH[0] = $this->safe_add($a, $HASH[0]);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   375
          $HASH[1] = $this->safe_add($b, $HASH[1]);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   376
          $HASH[2] = $this->safe_add($c, $HASH[2]);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   377
          $HASH[3] = $this->safe_add($d, $HASH[3]);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   378
          $HASH[4] = $this->safe_add($e, $HASH[4]);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   379
          $HASH[5] = $this->safe_add($f, $HASH[5]);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   380
          $HASH[6] = $this->safe_add($g, $HASH[6]);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   381
          $HASH[7] = $this->safe_add($h, $HASH[7]);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   382
      }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   383
      return $HASH;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   384
  }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   385
  function str2binb ($str) {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   386
    $bin = Array();
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   387
    for ( $i = 0; $i < strlen($str); $i++ )
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   388
    {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   389
      $byte = ord($str{$i});
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   390
      $block = floor($i / 4);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   391
      $stage = $i % 4;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   392
      if ( $stage == 0 )
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   393
      {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   394
        $bin[$block] = $byte;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   395
      }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   396
      else
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   397
      {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   398
        $bin[$block] <<= 8;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   399
        $bin[$block] |= $byte;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   400
      }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   401
    }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   402
    while ( $stage < 3 )
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   403
    {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   404
      $stage++;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   405
      $bin[$block] <<= 8;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   406
    }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   407
    return $bin;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   408
  }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   409
  function byte2hex($byte)
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   410
  {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   411
    $b = dechex(ord($byte));
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   412
    return ( strlen($b) < 2 ) ? "0$b" : $b;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   413
  }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   414
  function binb2hex ($binarray) {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   415
    $hexcase = 0; /* hex output format. 0 - lowercase; 1 - uppercase */
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   416
    $hex_tab = $hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   417
    $str = "";
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   418
    foreach ( $binarray as $bytes )
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   419
    {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   420
      $str .= implode('', array(
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   421
          $this->byte2hex(chr(( $bytes >> 24 ) & 0xFF)),
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   422
          $this->byte2hex(chr(( $bytes >> 16 ) & 0xFF)),
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   423
          $this->byte2hex(chr(( $bytes >> 8 ) & 0xFF)),
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   424
          $this->byte2hex(chr($bytes & 0xFF))
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   425
        ));
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   426
    }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   427
    return $str;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   428
  }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   429
  function hex_sha256 ( $s )
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   430
  {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   431
    return $this->binb2hex(
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   432
      $this->core_sha256(
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   433
        $this->str2binb($s),
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   434
        strlen($s) * $this->chrsz)
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   435
      );
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   436
  }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   437
}
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   438
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   439
if ( !function_exists('sha256') )
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   440
{
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   441
  function sha256($text)
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   442
  {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   443
    static $sha_obj = false;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   444
    if ( !is_object($sha_obj) )
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   445
      $sha_obj = new SHA256();
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   446
    return $sha_obj->hex_sha256($text);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   447
  }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   448
}
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   449
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   450
?>