includes/diffiehellman.php
author Dan
Tue, 22 Jul 2008 17:05:59 -0500
changeset 658 49dee7f374bf
parent 536 218a627eb53e
child 685 17ebe24cdf85
permissions -rw-r--r--
Fixed non-localized group names in theme-manager
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
536
218a627eb53e Rebrand as 1.1.4 (Caoineag alpha 4)
Dan
parents: 507
diff changeset
     5
 * Version 1.1.4 (Caoineag alpha 4)
218a627eb53e Rebrand as 1.1.4 (Caoineag alpha 4)
Dan
parents: 507
diff changeset
     6
 * Copyright (C) 2006-2008 Dan Fuhry
436
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
 * The Diffie-Hellman key exchange protocol
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
507
586fd7d3202d Fixed some stray version numbers (again!); added support for Diffie-Hellman logins in the normal login form (not AJAX) - even works in IE
Dan
parents: 467
diff changeset
    20
global $dh_supported;
586fd7d3202d Fixed some stray version numbers (again!); added support for Diffie-Hellman logins in the normal login form (not AJAX) - even works in IE
Dan
parents: 467
diff changeset
    21
$dh_supported = true;
586fd7d3202d Fixed some stray version numbers (again!); added support for Diffie-Hellman logins in the normal login form (not AJAX) - even works in IE
Dan
parents: 467
diff changeset
    22
try
586fd7d3202d Fixed some stray version numbers (again!); added support for Diffie-Hellman logins in the normal login form (not AJAX) - even works in IE
Dan
parents: 467
diff changeset
    23
{
586fd7d3202d Fixed some stray version numbers (again!); added support for Diffie-Hellman logins in the normal login form (not AJAX) - even works in IE
Dan
parents: 467
diff changeset
    24
  $GLOBALS['_math'] = enanomath_create();
586fd7d3202d Fixed some stray version numbers (again!); added support for Diffie-Hellman logins in the normal login form (not AJAX) - even works in IE
Dan
parents: 467
diff changeset
    25
}
586fd7d3202d Fixed some stray version numbers (again!); added support for Diffie-Hellman logins in the normal login form (not AJAX) - even works in IE
Dan
parents: 467
diff changeset
    26
catch ( Exception $e )
586fd7d3202d Fixed some stray version numbers (again!); added support for Diffie-Hellman logins in the normal login form (not AJAX) - even works in IE
Dan
parents: 467
diff changeset
    27
{
586fd7d3202d Fixed some stray version numbers (again!); added support for Diffie-Hellman logins in the normal login form (not AJAX) - even works in IE
Dan
parents: 467
diff changeset
    28
  $dh_supported = false;
586fd7d3202d Fixed some stray version numbers (again!); added support for Diffie-Hellman logins in the normal login form (not AJAX) - even works in IE
Dan
parents: 467
diff changeset
    29
}
436
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    30
// Our prime number as a base for operations.
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    31
$GLOBALS['dh_prime'] = '82818079787776757473727170696867666564636261605958575655545352515049484746454443424140393837363534333231302928272625242322212019181716151413121110987654321';
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    32
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    33
// g, a primitive root used as an exponent
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    34
// (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
    35
$GLOBALS['dh_g'] = '5';
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    36
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
 * Generates a Diffie-Hellman private key
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    39
 * @return string(BigInt)
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    40
 */
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
function dh_gen_private()
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
  global $_math;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    45
  return $_math->random(256);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    46
}
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    47
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    48
/**
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    49
 * Calculates the public key from the private key
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    50
 * @param string(BigInt)
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    51
 * @return string(BigInt)
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    52
 */
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    53
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    54
function dh_gen_public($b)
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    55
{
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    56
  global $_math, $dh_g, $dh_prime;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    57
  return $_math->powmod($dh_g, $b, $dh_prime);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    58
}
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    59
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    60
/**
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    61
 * Calculates the shared secret.
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    62
 * @param string(BigInt) Our private key
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    63
 * @param string(BigInt) Remote party's public key
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    64
 * @return string(BigInt)
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    65
 */
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    66
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    67
function dh_gen_shared_secret($a, $B)
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    68
{
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    69
  global $_math, $dh_g, $dh_prime;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    70
  return $_math->powmod($B, $a, $dh_prime);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    71
}
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    72
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    73
/*
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    74
SHA-256 algorithm - ported from Javascript
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    75
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    76
Copyright (c) 2003-2004, Angel Marin
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    77
All rights reserved.
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    78
Portions copyright (c) 2008 Dan Fuhry.
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
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
    81
are permitted provided that the following conditions are met:
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    82
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    83
 * 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
    84
   list of conditions and the following disclaimer.
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    85
 * 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
    86
   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
    87
   and/or other materials provided with the distribution.
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    88
 * 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
    89
   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
    90
   specific prior written permission.
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    91
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    92
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
    93
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
    94
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
    95
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
    96
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
    97
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
    98
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
    99
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
   100
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
   101
OF THE POSSIBILITY OF SUCH DAMAGE.
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
class SHA256
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   104
{
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   105
  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
   106
  
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   107
  function safe_add ($x, $y) {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   108
    $lsw = ($x & 0xFFFF) + ($y & 0xFFFF);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   109
    $msw = ($x >> 16) + ($y >> 16) + ($lsw >> 16);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   110
    return ($msw << 16) | ($lsw & 0xFFFF);
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
  function rshz($X, $n)
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
    // equivalent to $X >>> $n in javascript
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   115
    // 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
   116
    $z = hexdec(80000000); 
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   117
    if ($z & $X) 
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   118
    { 
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   119
        $X = ($X>>1); 
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   120
        $X &= (~$z); 
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   121
        $X |= 0x40000000; 
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   122
        $X = ($X>>($n-1)); 
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
    else 
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
        $X = ($X>>$n); 
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
    return $X; 
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   129
  }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   130
  function S ($X, $n) {return ( $this->rshz($X, $n) ) | ($X << (32 - $n));}
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   131
  function R ($X, $n) {return ( $this->rshz($X, $n) );}
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   132
  function Ch($x, $y, $z)  {return (($x & $y) ^ ((~$x) & $z));}
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   133
  function Maj($x, $y, $z) {return (($x & $y) ^ ($x & $z) ^ ($y & $z));}
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   134
  function Sigma0256($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
   135
  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
   136
  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
   137
  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
   138
  function core_sha256 ($m, $l) {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   139
      $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
   140
      $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
   141
      $W = Array(64);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   142
      /* append padding */
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   143
      $m[$l >> 5] |= 0x80 << (24 - $l % 32);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   144
      $m[(($l + 64 >> 9) << 4) + 15] = $l;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   145
      for ( $i = 0; $i<count($m); $i+=16 ) {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   146
          $a = $HASH[0];
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   147
          $b = $HASH[1];
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   148
          $c = $HASH[2];
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   149
          $d = $HASH[3];
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   150
          $e = $HASH[4];
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   151
          $f = $HASH[5];
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   152
          $g = $HASH[6];
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   153
          $h = $HASH[7];
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   154
          for ( $j = 0; $j<64; $j++)
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
              if ( $j < 16 )
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
                $W[$j] = ( isset($m[$j + $i]) ) ? $m[$j + $i] : 0;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   159
              }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   160
              else
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   161
              {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   162
                $W[$j] = $this->safe_add(
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   163
                  $this->safe_add(
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   164
                    $this->safe_add(
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   165
                      $this->Gamma1256($W[$j - 2]), $W[$j - 7]),
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   166
                    $this->Gamma0256($W[$j - 15])),
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   167
                  $W[$j - 16]);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   168
              }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   169
              $T1 = $this->safe_add(
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   170
                $this->safe_add(
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   171
                  $this->safe_add(
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   172
                    $this->safe_add($h, $this->Sigma1256($e)
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   173
                      ),
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   174
                    $this->Ch($e, $f, $g)),
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   175
                  $K[$j]),
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   176
                $W[$j]);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   177
              $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
   178
              $h = $g;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   179
              $g = $f;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   180
              $f = $e;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   181
              $e = $this->safe_add($d, $T1);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   182
              $d = $c;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   183
              $c = $b;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   184
              $b = $a;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   185
              $a = $this->safe_add($T1, $T2);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   186
          }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   187
          $HASH[0] = $this->safe_add($a, $HASH[0]);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   188
          $HASH[1] = $this->safe_add($b, $HASH[1]);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   189
          $HASH[2] = $this->safe_add($c, $HASH[2]);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   190
          $HASH[3] = $this->safe_add($d, $HASH[3]);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   191
          $HASH[4] = $this->safe_add($e, $HASH[4]);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   192
          $HASH[5] = $this->safe_add($f, $HASH[5]);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   193
          $HASH[6] = $this->safe_add($g, $HASH[6]);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   194
          $HASH[7] = $this->safe_add($h, $HASH[7]);
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
      return $HASH;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   197
  }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   198
  function str2binb ($str) {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   199
    $bin = Array();
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   200
    for ( $i = 0; $i < strlen($str); $i++ )
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   201
    {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   202
      $byte = ord($str{$i});
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   203
      $block = floor($i / 4);
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   204
      $stage = $i % 4;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   205
      if ( $stage == 0 )
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
        $bin[$block] = $byte;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   208
      }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   209
      else
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
        $bin[$block] <<= 8;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   212
        $bin[$block] |= $byte;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   213
      }
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
    while ( $stage < 3 )
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   216
    {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   217
      $stage++;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   218
      $bin[$block] <<= 8;
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
    return $bin;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   221
  }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   222
  function byte2hex($byte)
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
    $b = dechex(ord($byte));
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   225
    return ( strlen($b) < 2 ) ? "0$b" : $b;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   226
  }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   227
  function binb2hex ($binarray) {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   228
    $hexcase = 0; /* hex output format. 0 - lowercase; 1 - uppercase */
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   229
    $hex_tab = $hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   230
    $str = "";
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   231
    foreach ( $binarray as $bytes )
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   232
    {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   233
      $str .= implode('', array(
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   234
          $this->byte2hex(chr(( $bytes >> 24 ) & 0xFF)),
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   235
          $this->byte2hex(chr(( $bytes >> 16 ) & 0xFF)),
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   236
          $this->byte2hex(chr(( $bytes >> 8 ) & 0xFF)),
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   237
          $this->byte2hex(chr($bytes & 0xFF))
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   238
        ));
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
    return $str;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   241
  }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   242
  function hex_sha256 ( $s )
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   243
  {
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   244
    return $this->binb2hex(
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   245
      $this->core_sha256(
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   246
        $this->str2binb($s),
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   247
        strlen($s) * $this->chrsz)
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   248
      );
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   249
  }
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   250
}
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   251
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   252
if ( !function_exists('sha256') )
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   253
{
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   254
  function sha256($text)
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
    static $sha_obj = false;
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   257
    if ( !is_object($sha_obj) )
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   258
      $sha_obj = new SHA256();
242353360e37 Added support for Diffie-Hellman key exchange during login. w00t!
Dan
parents:
diff changeset
   259
    return $sha_obj->hex_sha256($text);
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
}
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
?>