'MD4 Hashing in JavaScript'에 해당되는 글 1건

  1. 2010.02.19 MD4 Hashing in JavaScript
03.HTML 4.X, HTML5, XML.../HTML/Css/Script2010. 2. 19. 19:06

MD4 Hashing in JavaScript

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<html>
  <head>
    <!--
      CryptoMX Tools
      Copyright (C) 2004 - 2006 Derek Buitenhuis

      This program is free software; you can redistribute it and/or
      modify it under the terms of the GNU General Public License
      as published by the Free Software Foundation; either version 2
      of the License, or (at your option) any later version.

      This program is distributed in the hope that it will be useful,
      but WITHOUT ANY WARRANTY; without even the implied warranty of
      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      GNU General Public License for more details.

      You should have received a copy of the GNU General Public License
      along with this program; if not, write to the Free Software
      Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
    -->
    <title>MD4 Hashing</title>
  </head>
  <body>
      <!-- md4.js -->
    <script language="JavaScript">
/*
 * A JavaScript implementation of the RSA Data Security, Inc. MD4 Message
 * Digest Algorithm, as defined in RFC 1320.
 * Version 2.1 Copyright (C) Jerrad Pierce, Paul Johnston 1999 - 2002.
 * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
 * Distributed under the BSD License
 * See http://pajhome.org.uk/crypt/md5 for more info.
 */

var hexcase = 0;
var b64pad  = "";
var chrsz   = 8;

function hex_md4(s){ return binl2hex(core_md4(str2binl(s), s.length * chrsz));}
function b64_md4(s){ return binl2b64(core_md4(str2binl(s), s.length * chrsz));}
function str_md4(s){ return binl2str(core_md4(str2binl(s), s.length * chrsz));}
function hex_hmac_md4(key, data) { return binl2hex(core_hmac_md4(key, data)); }
function b64_hmac_md4(key, data) { return binl2b64(core_hmac_md4(key, data)); }
function str_hmac_md4(key, data) { return binl2str(core_hmac_md4(key, data)); }

function md4_vm_test()
{
  return hex_md4("abc") == "a448017aaf21d8525fc10ae87aa6729d";
}

function core_md4(x, len)
{
  x[len >> 5] |= 0x80 << (len % 32);
  x[(((len + 64) >>> 9) << 4) + 14] = len;
 
  var a =  1732584193;
  var b = -271733879;
  var c = -1732584194;
  var d =  271733878;

  for(var i = 0; i < x.length; i += 16)
  {
    var olda = a;
    var oldb = b;
    var oldc = c;
    var oldd = d;

    a = md4_ff(a, b, c, d, x[i+ 0], 3 );
    d = md4_ff(d, a, b, c, x[i+ 1], 7 );
    c = md4_ff(c, d, a, b, x[i+ 2], 11);
    b = md4_ff(b, c, d, a, x[i+ 3], 19);
    a = md4_ff(a, b, c, d, x[i+ 4], 3 );
    d = md4_ff(d, a, b, c, x[i+ 5], 7 );
    c = md4_ff(c, d, a, b, x[i+ 6], 11);
    b = md4_ff(b, c, d, a, x[i+ 7], 19);
    a = md4_ff(a, b, c, d, x[i+ 8], 3 );
    d = md4_ff(d, a, b, c, x[i+ 9], 7 );
    c = md4_ff(c, d, a, b, x[i+10], 11);
    b = md4_ff(b, c, d, a, x[i+11], 19);
    a = md4_ff(a, b, c, d, x[i+12], 3 );
    d = md4_ff(d, a, b, c, x[i+13], 7 );
    c = md4_ff(c, d, a, b, x[i+14], 11);
    b = md4_ff(b, c, d, a, x[i+15], 19);

    a = md4_gg(a, b, c, d, x[i+ 0], 3 );
    d = md4_gg(d, a, b, c, x[i+ 4], 5 );
    c = md4_gg(c, d, a, b, x[i+ 8], 9 );
    b = md4_gg(b, c, d, a, x[i+12], 13);
    a = md4_gg(a, b, c, d, x[i+ 1], 3 );
    d = md4_gg(d, a, b, c, x[i+ 5], 5 );
    c = md4_gg(c, d, a, b, x[i+ 9], 9 );
    b = md4_gg(b, c, d, a, x[i+13], 13);
    a = md4_gg(a, b, c, d, x[i+ 2], 3 );
    d = md4_gg(d, a, b, c, x[i+ 6], 5 );
    c = md4_gg(c, d, a, b, x[i+10], 9 );
    b = md4_gg(b, c, d, a, x[i+14], 13);
    a = md4_gg(a, b, c, d, x[i+ 3], 3 );
    d = md4_gg(d, a, b, c, x[i+ 7], 5 );
    c = md4_gg(c, d, a, b, x[i+11], 9 );
    b = md4_gg(b, c, d, a, x[i+15], 13);

    a = md4_hh(a, b, c, d, x[i+ 0], 3 );
    d = md4_hh(d, a, b, c, x[i+ 8], 9 );
    c = md4_hh(c, d, a, b, x[i+ 4], 11);
    b = md4_hh(b, c, d, a, x[i+12], 15);
    a = md4_hh(a, b, c, d, x[i+ 2], 3 );
    d = md4_hh(d, a, b, c, x[i+10], 9 );
    c = md4_hh(c, d, a, b, x[i+ 6], 11);
    b = md4_hh(b, c, d, a, x[i+14], 15);
    a = md4_hh(a, b, c, d, x[i+ 1], 3 );
    d = md4_hh(d, a, b, c, x[i+ 9], 9 );
    c = md4_hh(c, d, a, b, x[i+ 5], 11);
    b = md4_hh(b, c, d, a, x[i+13], 15);
    a = md4_hh(a, b, c, d, x[i+ 3], 3 );
    d = md4_hh(d, a, b, c, x[i+11], 9 );
    c = md4_hh(c, d, a, b, x[i+ 7], 11);
    b = md4_hh(b, c, d, a, x[i+15], 15);

    a = safe_add(a, olda);
    b = safe_add(b, oldb);
    c = safe_add(c, oldc);
    d = safe_add(d, oldd);

  }
  return Array(a, b, c, d);

}

function md4_cmn(q, a, b, x, s, t)
{
  return safe_add(rol(safe_add(safe_add(a, q), safe_add(x, t)), s), b);
}
function md4_ff(a, b, c, d, x, s)
{
  return md4_cmn((b & c) | ((~b) & d), a, 0, x, s, 0);
}
function md4_gg(a, b, c, d, x, s)
{
  return md4_cmn((b & c) | (b & d) | (c & d), a, 0, x, s, 1518500249);
}
function md4_hh(a, b, c, d, x, s)
{
  return md4_cmn(b ^ c ^ d, a, 0, x, s, 1859775393);
}

/*
 * Calculate the HMAC-MD4, of a key and some data
 */
function core_hmac_md4(key, data)
{
  var bkey = str2binl(key);
  if(bkey.length > 16) bkey = core_md4(bkey, key.length * chrsz);

  var ipad = Array(16), opad = Array(16);
  for(var i = 0; i < 16; i++)
  {
    ipad[i] = bkey[i] ^ 0x36363636;
    opad[i] = bkey[i] ^ 0x5C5C5C5C;
  }

  var hash = core_md4(ipad.concat(str2binl(data)), 512 + data.length * chrsz);
  return core_md4(opad.concat(hash), 512 + 128);
}

function safe_add(x, y)
{
  var lsw = (x & 0xFFFF) + (y & 0xFFFF);
  var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
  return (msw << 16) | (lsw & 0xFFFF);
}

function rol(num, cnt)
{
  return (num << cnt) | (num >>> (32 - cnt));
}

function str2binl(str)
{
  var bin = Array();
  var mask = (1 << chrsz) - 1;
  for(var i = 0; i < str.length * chrsz; i += chrsz)
    bin[i>>5] |= (str.charCodeAt(i / chrsz) & mask) << (i%32);
  return bin;
}

function binl2str(bin)
{
  var str = "";
  var mask = (1 << chrsz) - 1;
  for(var i = 0; i < bin.length * 32; i += chrsz)
    str += String.fromCharCode((bin[i>>5] >>> (i % 32)) & mask);
  return str;
}

function binl2hex(binarray)
{
  var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
  var str = "";
  for(var i = 0; i < binarray.length * 4; i++)
  {
    str += hex_tab.charAt((binarray[i>>2] >> ((i%4)*8+4)) & 0xF) +
           hex_tab.charAt((binarray[i>>2] >> ((i%4)*8  )) & 0xF);
  }
  return str;
}

function binl2b64(binarray)
{
  var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
  var str = "";
  for(var i = 0; i < binarray.length * 4; i += 3)
  {
    var triplet = (((binarray[i   >> 2] >> 8 * ( i   %4)) & 0xFF) << 16)
                | (((binarray[i+1 >> 2] >> 8 * ((i+1)%4)) & 0xFF) << 8 )
                |  ((binarray[i+2 >> 2] >> 8 * ((i+2)%4)) & 0xFF);
    for(var j = 0; j < 4; j++)
    {
      if(i * 8 + j * 6 > binarray.length * 32) str += b64pad;
      else str += tab.charAt((triplet >> 6*(3-j)) & 0x3F);
    }
  }
  return str;
}

    </script>
    <form>
      <font color=#000000 size=3>Input</font>  </td><td > <input type=text name=input size=40><br>
      <font color=#000000 size=3>Result</font> </td><td > <input type=text name=hash size=40><br>
      <input type=button value="MD4 It!" onclick="hash.value = hex_md4(input.value)">
    </form>
  </body>
</html>
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