JavaScript version MD5 app

I think it's easy to use Java to MD5 a string, but suppose you want to do MD5 in a client for a string in a Web page.

A JS file (md5.js) that MD5 operations such as strings, etc.

/* * 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 HTTP://PAJHOME.O RG.UK/CRYPT/MD5 for more info. *//* * Configurable variables. Need to tweak these to being compatible with * The server-side, and the defaults work on 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 is the functions you'll usually want to call * They take string arguments and return eithe R 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") = = "900150983 Cd24fb0d6963f7d28e17f72 ";} /* * Calculate the MD5 of an array of Little-endian words, and a bit length */function core_md5 (x, len) {/* Append Paddin  G */X[len >> 5] |= 0x80 << (len)% 32);  X[((len + >>> 9) << 4) + +] = len;  var a = 1732584193;  var b =-271733879;  var c =-1732584194;  var d = 271733878;    for (var i = 0; i < x.length; i + = +) {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 (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 > Bkey) = Core_md5 (Bkey, key.length * chrsz);  var ipad = array (+), Opad = Array (16);    for (var i = 0; i < i++) {Ipad[i] = bkey[i] ^ 0x36363636;  Opad[i] = bkey[i] ^ 0x5c5c5c5c;  } var hash = Core_md5 (Ipad.concat (STR2BINL (data)), + 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 >> +) + (y >> +) + (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 has their hi-byte silent Ly 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) <&lt ;  (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 * +, i + = Chrsz) str + string.fromcharcode ((bin[i>>5] >>> (i% 32)) & Amp  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) &A mp  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 * +) str + = B64pad;    else str + = Tab.charat ((triplet >> 6* (3-j)) & 0x3F); }} return str;}

Code 2--test used HTML file (index.html):

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JavaScript version MD5 app