First introduce

<script src="js/md5.js?1.1.10" type="text/javascript"></script>

Usage:

hex_md5("123456");

md5.js file download:

/*
?*?A?JavaScript?implementation?of?the?RSA?Data?Security,?Inc.?MD5?Message
?*?Digest?Algorithm,?as?defined?in?RFC?1321.
?*?Version?2.1?Copyright?(C)?Paul?Johnston?1999?-?2002.
?*?Other?contributors:?Greg?Holt,?Andrew?Kepert,?Ydnar,?Lostinet
?*?Distributed?under?the?BSD?License
?*?See??for?more?info.?*//*
?*?Configurable?variables.?You?may?need?to?tweak?these?to?be?compatible?with
?*?the?server-side,?but?the?defaults?work?in?most?cases.?*/var?hexcase?=?0;??/*?hex?output?format.?0?-?lowercase;?1?-?uppercase????????*/var?b64pad??=?"";?/*?base-64?pad?character.?"="?for?strict?RFC?compliance???*/var?chrsz???=?8;??/*?bits?per?input?character.?8?-?ASCII;?16?-?Unicode??????*//*
?*?These?are?the?functions?you'll?usually?want?to?call
?*?They?take?string?arguments?and?return?either?hex?or?base-64?encoded?strings?*/function?hex_md5(s){?return?binl2hex(core_md5(str2binl(s),?s.length?*?chrsz));}
function?b64_md5(s){?return?binl2b64(core_md5(str2binl(s),?s.length?*?chrsz));}
function?str_md5(s){?return?binl2str(core_md5(str2binl(s),?s.length?*?chrsz));}
function?hex_hmac_md5(key,?data)?{?return?binl2hex(core_hmac_md5(key,?data));?}
function?b64_hmac_md5(key,?data)?{?return?binl2b64(core_hmac_md5(key,?data));?}
function?str_hmac_md5(key,?data)?{?return?binl2str(core_hmac_md5(key,?data));?}/*
?*?Perform?a?simple?self-test?to?see?if?the?VM?is?working?*/function?md5_vm_test()
{??return?hex_md5("abc")?==?"900150983cd24fb0d6963f7d28e17f72";
}/*
?*?Calculate?the?MD5?of?an?array?of?little-endian?words,?and?a?bit?length?*/function?core_md5(x,?len)
{??/*?append?padding?*/
??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 = md5_ff(a, b, c, d, x[i+ 0], 7 , -680876936);
    d = md5_ff(d, a, b, c, x[i+ 1], 12, -389564586);
    c = md5_ff(c, d, a, b, x[i+ 2], 17,  606105819);
    b = md5_ff(b, c, d, a, x[i+ 3], 22, -1044525330);
    a = md5_ff(a, b, c, d, x[i+ 4], 7 , -176418897);
    d = md5_ff(d, a, b, c, x[i+ 5], 12,  1200080426);
    c = md5_ff(c, d, a, b, x[i+ 6], 17, -1473231341);
    b = md5_ff(b, c, d, a, x[i+ 7], 22, -45705983);
    a = md5_ff(a, b, c, d, x[i+ 8], 7 ,  1770035416);
    d = md5_ff(d, a, b, c, x[i+ 9], 12, -1958414417);
    c = md5_ff(c, d, a, b, x[i+10], 17, -42063);
    b = md5_ff(b, c, d, a, x[i+11], 22, -1990404162);
    a = md5_ff(a, b, c, d, x[i+12], 7 ,  1804603682);
    d = md5_ff(d, a, b, c, x[i+13], 12, -40341101);
    c = md5_ff(c, d, a, b, x[i+14], 17, -1502002290);
    b = md5_ff(b, c, d, a, x[i+15], 22,  1236535329);

    a = md5_gg(a, b, c, d, x[i+ 1], 5 , -165796510);
    d = md5_gg(d, a, b, c, x[i+ 6], 9 , -1069501632);
    c = md5_gg(c, d, a, b, x[i+11], 14,  643717713);
    b = md5_gg(b, c, d, a, x[i+ 0], 20, -373897302);
    a = md5_gg(a, b, c, d, x[i+ 5], 5 , -701558691);
    d = md5_gg(d, a, b, c, x[i+10], 9 ,  38016083);
    c = md5_gg(c, d, a, b, x[i+15], 14, -660478335);
    b = md5_gg(b, c, d, a, x[i+ 4], 20, -405537848);
    a = md5_gg(a, b, c, d, x[i+ 9], 5 ,  568446438);
    d = md5_gg(d, a, b, c, x[i+14], 9 , -1019803690);
    c = md5_gg(c, d, a, b, x[i+ 3], 14, -187363961);
    b = md5_gg(b, c, d, a, x[i+ 8], 20,  1163531501);
    a = md5_gg(a, b, c, d, x[i+13], 5 , -1444681467);
    d = md5_gg(d, a, b, c, x[i+ 2], 9 , -51403784);
    c = md5_gg(c, d, a, b, x[i+ 7], 14,  1735328473);
    b = md5_gg(b, c, d, a, x[i+12], 20, -1926607734);

    a = md5_hh(a, b, c, d, x[i+ 5], 4 , -378558);
    d = md5_hh(d, a, b, c, x[i+ 8], 11, -2022574463);
    c = md5_hh(c, d, a, b, x[i+11], 16,  1839030562);
    b = md5_hh(b, c, d, a, x[i+14], 23, -35309556);
    a = md5_hh(a, b, c, d, x[i+ 1], 4 , -1530992060);
    d = md5_hh(d, a, b, c, x[i+ 4], 11,  1272893353);
    c = md5_hh(c, d, a, b, x[i+ 7], 16, -155497632);
    b = md5_hh(b, c, d, a, x[i+10], 23, -1094730640);
    a = md5_hh(a, b, c, d, x[i+13], 4 ,  681279174);
    d = md5_hh(d, a, b, c, x[i+ 0], 11, -358537222);
    c = md5_hh(c, d, a, b, x[i+ 3], 16, -722521979);
    b = md5_hh(b, c, d, a, x[i+ 6], 23,  76029189);
    a = md5_hh(a, b, c, d, x[i+ 9], 4 , -640364487);
    d = md5_hh(d, a, b, c, x[i+12], 11, -421815835);
    c = md5_hh(c, d, a, b, x[i+15], 16,  530742520);
    b = md5_hh(b, c, d, a, x[i+ 2], 23, -995338651);

    a = md5_ii(a, b, c, d, x[i+ 0], 6 , -198630844);
    d = md5_ii(d, a, b, c, x[i+ 7], 10,  1126891415);
    c = md5_ii(c, d, a, b, x[i+14], 15, -1416354905);
    b = md5_ii(b, c, d, a, x[i+ 5], 21, -57434055);
    a = md5_ii(a, b, c, d, x[i+12], 6 ,  1700485571);
    d = md5_ii(d, a, b, c, x[i+ 3], 10, -1894986606);
    c = md5_ii(c, d, a, b, x[i+10], 15, -1051523);
    b = md5_ii(b, c, d, a, x[i+ 1], 21, -2054922799);
    a = md5_ii(a, b, c, d, x[i+ 8], 6 ,  1873313359);
    d = md5_ii(d, a, b, c, x[i+15], 10, -30611744);
    c = md5_ii(c, d, a, b, x[i+ 6], 15, -1560198380);
    b = md5_ii(b, c, d, a, x[i+13], 21,  1309151649);
    a = md5_ii(a, b, c, d, x[i+ 4], 6 , -145523070);
    d = md5_ii(d, a, b, c, x[i+11], 10, -1120210379);
    c = md5_ii(c, d, a, b, x[i+ 2], 15,  718787259);
    b = md5_ii(b, c, d, a, x[i+ 9], 21, -343485551);

    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);

}/*
 * These functions implement the four basic operations the algorithm uses. */function md5_cmn(q, a, b, x, s, t)
{  return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s),b);
}
function md5_ff(a, b, c, d, x, s, t)
{  return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);
}
function md5_gg(a, b, c, d, x, s, t)
{  return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);
}
function md5_hh(a, b, c, d, x, s, t)
{  return md5_cmn(b ^ c ^ d, a, b, x, s, t);
}
function md5_ii(a, b, c, d, x, s, t)
{  return md5_cmn(c ^ (b | (~d)), a, b, x, s, t);
}/*
 * Calculate the HMAC-MD5, of a key and some data */function core_hmac_md5(key, data)
{  var bkey = str2binl(key);  if(bkey.length >?16)?bkey?=?core_md5(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_md5(ipad.concat(str2binl(data)), 512 + data.length * chrsz);  return core_md5(opad.concat(hash), 512 + 128);
}/*
 * Add integers, wrapping at 2^32. This uses 16-bit operations internally
 * to work around bugs in some JS interpreters. */function safe_add(x, y)
{  var lsw = (x & 0xFFFF) + (y & 0xFFFF);  var msw = (x >>?16)?+?(y?>>?16)?+?(lsw?>>?16);??return?(msw?<< 16) | (lsw & 0xFFFF);
}/*
 * Bitwise rotate a 32-bit number to the left. */function bit_rol(num, cnt)
{  return (num << cnt) | (num >>>?(32?-?cnt));
}/*
?*?Convert?a?string?to?an?array?of?little-endian?words
?*?If?chrsz?is?ASCII,?characters?>255?have?their?hi-byte?silently?ignored.?*/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;
}/*
 * Convert an array of little-endian words to a string */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;
}/*
?*?Convert?an?array?of?little-endian?words?to?a?hex?string.?*/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;
}/*
?*?Convert?an?array?of?little-endian?words?to?a?base-64?string?*/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;
}

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