-
-
Save vor0nwe/9296315 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
/* | |
* http://www.myersdaily.org/joseph/javascript/md5-text.html | |
*/ | |
(function (global) { | |
var md5cycle = function (x, k) { | |
var a = x[0], | |
b = x[1], | |
c = x[2], | |
d = x[3]; | |
a = ff(a, b, c, d, k[0], 7, -680876936); | |
d = ff(d, a, b, c, k[1], 12, -389564586); | |
c = ff(c, d, a, b, k[2], 17, 606105819); | |
b = ff(b, c, d, a, k[3], 22, -1044525330); | |
a = ff(a, b, c, d, k[4], 7, -176418897); | |
d = ff(d, a, b, c, k[5], 12, 1200080426); | |
c = ff(c, d, a, b, k[6], 17, -1473231341); | |
b = ff(b, c, d, a, k[7], 22, -45705983); | |
a = ff(a, b, c, d, k[8], 7, 1770035416); | |
d = ff(d, a, b, c, k[9], 12, -1958414417); | |
c = ff(c, d, a, b, k[10], 17, -42063); | |
b = ff(b, c, d, a, k[11], 22, -1990404162); | |
a = ff(a, b, c, d, k[12], 7, 1804603682); | |
d = ff(d, a, b, c, k[13], 12, -40341101); | |
c = ff(c, d, a, b, k[14], 17, -1502002290); | |
b = ff(b, c, d, a, k[15], 22, 1236535329); | |
a = gg(a, b, c, d, k[1], 5, -165796510); | |
d = gg(d, a, b, c, k[6], 9, -1069501632); | |
c = gg(c, d, a, b, k[11], 14, 643717713); | |
b = gg(b, c, d, a, k[0], 20, -373897302); | |
a = gg(a, b, c, d, k[5], 5, -701558691); | |
d = gg(d, a, b, c, k[10], 9, 38016083); | |
c = gg(c, d, a, b, k[15], 14, -660478335); | |
b = gg(b, c, d, a, k[4], 20, -405537848); | |
a = gg(a, b, c, d, k[9], 5, 568446438); | |
d = gg(d, a, b, c, k[14], 9, -1019803690); | |
c = gg(c, d, a, b, k[3], 14, -187363961); | |
b = gg(b, c, d, a, k[8], 20, 1163531501); | |
a = gg(a, b, c, d, k[13], 5, -1444681467); | |
d = gg(d, a, b, c, k[2], 9, -51403784); | |
c = gg(c, d, a, b, k[7], 14, 1735328473); | |
b = gg(b, c, d, a, k[12], 20, -1926607734); | |
a = hh(a, b, c, d, k[5], 4, -378558); | |
d = hh(d, a, b, c, k[8], 11, -2022574463); | |
c = hh(c, d, a, b, k[11], 16, 1839030562); | |
b = hh(b, c, d, a, k[14], 23, -35309556); | |
a = hh(a, b, c, d, k[1], 4, -1530992060); | |
d = hh(d, a, b, c, k[4], 11, 1272893353); | |
c = hh(c, d, a, b, k[7], 16, -155497632); | |
b = hh(b, c, d, a, k[10], 23, -1094730640); | |
a = hh(a, b, c, d, k[13], 4, 681279174); | |
d = hh(d, a, b, c, k[0], 11, -358537222); | |
c = hh(c, d, a, b, k[3], 16, -722521979); | |
b = hh(b, c, d, a, k[6], 23, 76029189); | |
a = hh(a, b, c, d, k[9], 4, -640364487); | |
d = hh(d, a, b, c, k[12], 11, -421815835); | |
c = hh(c, d, a, b, k[15], 16, 530742520); | |
b = hh(b, c, d, a, k[2], 23, -995338651); | |
a = ii(a, b, c, d, k[0], 6, -198630844); | |
d = ii(d, a, b, c, k[7], 10, 1126891415); | |
c = ii(c, d, a, b, k[14], 15, -1416354905); | |
b = ii(b, c, d, a, k[5], 21, -57434055); | |
a = ii(a, b, c, d, k[12], 6, 1700485571); | |
d = ii(d, a, b, c, k[3], 10, -1894986606); | |
c = ii(c, d, a, b, k[10], 15, -1051523); | |
b = ii(b, c, d, a, k[1], 21, -2054922799); | |
a = ii(a, b, c, d, k[8], 6, 1873313359); | |
d = ii(d, a, b, c, k[15], 10, -30611744); | |
c = ii(c, d, a, b, k[6], 15, -1560198380); | |
b = ii(b, c, d, a, k[13], 21, 1309151649); | |
a = ii(a, b, c, d, k[4], 6, -145523070); | |
d = ii(d, a, b, c, k[11], 10, -1120210379); | |
c = ii(c, d, a, b, k[2], 15, 718787259); | |
b = ii(b, c, d, a, k[9], 21, -343485551); | |
x[0] = add32(a, x[0]); | |
x[1] = add32(b, x[1]); | |
x[2] = add32(c, x[2]); | |
x[3] = add32(d, x[3]); | |
} | |
var cmn = function (q, a, b, x, s, t) { | |
a = add32(add32(a, q), add32(x, t)); | |
return add32((a << s) | (a >>> (32 - s)), b); | |
} | |
var ff = function (a, b, c, d, x, s, t) { | |
return cmn((b & c) | ((~b) & d), a, b, x, s, t); | |
} | |
var gg = function (a, b, c, d, x, s, t) { | |
return cmn((b & d) | (c & (~d)), a, b, x, s, t); | |
} | |
var hh = function (a, b, c, d, x, s, t) { | |
return cmn(b ^ c ^ d, a, b, x, s, t); | |
} | |
var ii = function (a, b, c, d, x, s, t) { | |
return cmn(c ^ (b | (~d)), a, b, x, s, t); | |
} | |
var md51 = function (s) { | |
var txt = '', | |
n = s.length, | |
state = [1732584193, -271733879, -1732584194, 271733878], | |
i; | |
for (i = 64; i <= s.length; i += 64) { | |
md5cycle(state, md5blk(s.substring(i - 64, i))); | |
} | |
s = s.substring(i - 64); | |
var tail = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]; | |
for (i = 0; i < s.length; i++) | |
tail[i >> 2] |= s.charCodeAt(i) << ((i % 4) << 3); | |
tail[i >> 2] |= 0x80 << ((i % 4) << 3); | |
if (i > 55) { | |
md5cycle(state, tail); | |
for (i = 0; i < 16; i++) tail[i] = 0; | |
} | |
tail[14] = n * 8; | |
md5cycle(state, tail); | |
return state; | |
} | |
/* there needs to be support for Unicode here, | |
* unless we pretend that we can redefine the MD-5 | |
* algorithm for multi-byte characters (perhaps | |
* by adding every four 16-bit characters and | |
* shortening the sum to 32 bits). Otherwise | |
* I suggest performing MD-5 as if every character | |
* was two bytes--e.g., 0040 0025 = @%--but then | |
* how will an ordinary MD-5 sum be matched? | |
* There is no way to standardize text to something | |
* like UTF-8 before transformation; speed cost is | |
* utterly prohibitive. The JavaScript standard | |
* itself needs to look at this: it should start | |
* providing access to strings as preformed UTF-8 | |
* 8-bit unsigned value arrays. | |
*/ | |
var md5blk = function (s) { /* I figured global was faster. */ | |
var md5blks = [], | |
i; /* Andy King said do it this way. */ | |
for (i = 0; i < 64; i += 4) { | |
md5blks[i >> 2] = s.charCodeAt(i) + (s.charCodeAt(i + 1) << 8) + (s.charCodeAt(i + 2) << 16) + (s.charCodeAt(i + 3) << 24); | |
} | |
return md5blks; | |
} | |
var hex_chr = '0123456789abcdef'.split(''); | |
var rhex = function (n) { | |
var s = '', | |
j = 0; | |
for (; j < 4; j++) | |
s += hex_chr[(n >> (j * 8 + 4)) & 0x0F] + hex_chr[(n >> (j * 8)) & 0x0F]; | |
return s; | |
} | |
var hex = function (x) { | |
for (var i = 0; i < x.length; i++) | |
x[i] = rhex(x[i]); | |
return x.join(''); | |
} | |
var md5 = global.md5 = function (s) { | |
return hex(md51(s)); | |
} | |
/* this function is much faster, | |
so if possible we use it. Some IEs | |
are the only ones I know of that | |
need the idiotic second function, | |
generated by an if clause. */ | |
var add32 = function (a, b) { | |
return (a + b) & 0xFFFFFFFF; | |
} | |
if (md5('hello') != '5d41402abc4b2a76b9719d911017c592') { | |
var add32 = function (x, y) { | |
var lsw = (x & 0xFFFF) + (y & 0xFFFF), | |
msw = (x >> 16) + (y >> 16) + (lsw >> 16); | |
return (msw << 16) | (lsw & 0xFFFF); | |
} | |
} | |
})(window); |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment