161 lines
5.7 KiB
JavaScript
161 lines
5.7 KiB
JavaScript
(function(){
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var crypt = require('crypt'),
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utf8 = require('charenc').utf8,
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isBuffer = require('is-buffer'),
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bin = require('charenc').bin,
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// The core
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md5 = function (message, options) {
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// Convert to byte array
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if (message.constructor == String)
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if (options && options.encoding === 'binary')
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message = bin.stringToBytes(message);
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else
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message = utf8.stringToBytes(message);
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else if (isBuffer(message))
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message = Array.prototype.slice.call(message, 0);
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else if (!Array.isArray(message))
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message = message.toString();
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// else, assume byte array already
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var m = crypt.bytesToWords(message),
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l = message.length * 8,
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a = 1732584193,
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b = -271733879,
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c = -1732584194,
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d = 271733878;
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// Swap endian
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for (var i = 0; i < m.length; i++) {
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m[i] = ((m[i] << 8) | (m[i] >>> 24)) & 0x00FF00FF |
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((m[i] << 24) | (m[i] >>> 8)) & 0xFF00FF00;
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}
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// Padding
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m[l >>> 5] |= 0x80 << (l % 32);
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m[(((l + 64) >>> 9) << 4) + 14] = l;
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// Method shortcuts
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var FF = md5._ff,
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GG = md5._gg,
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HH = md5._hh,
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II = md5._ii;
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for (var i = 0; i < m.length; i += 16) {
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var aa = a,
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bb = b,
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cc = c,
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dd = d;
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a = FF(a, b, c, d, m[i+ 0], 7, -680876936);
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d = FF(d, a, b, c, m[i+ 1], 12, -389564586);
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c = FF(c, d, a, b, m[i+ 2], 17, 606105819);
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b = FF(b, c, d, a, m[i+ 3], 22, -1044525330);
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a = FF(a, b, c, d, m[i+ 4], 7, -176418897);
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d = FF(d, a, b, c, m[i+ 5], 12, 1200080426);
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c = FF(c, d, a, b, m[i+ 6], 17, -1473231341);
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b = FF(b, c, d, a, m[i+ 7], 22, -45705983);
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a = FF(a, b, c, d, m[i+ 8], 7, 1770035416);
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d = FF(d, a, b, c, m[i+ 9], 12, -1958414417);
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c = FF(c, d, a, b, m[i+10], 17, -42063);
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b = FF(b, c, d, a, m[i+11], 22, -1990404162);
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a = FF(a, b, c, d, m[i+12], 7, 1804603682);
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d = FF(d, a, b, c, m[i+13], 12, -40341101);
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c = FF(c, d, a, b, m[i+14], 17, -1502002290);
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b = FF(b, c, d, a, m[i+15], 22, 1236535329);
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a = GG(a, b, c, d, m[i+ 1], 5, -165796510);
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d = GG(d, a, b, c, m[i+ 6], 9, -1069501632);
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c = GG(c, d, a, b, m[i+11], 14, 643717713);
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b = GG(b, c, d, a, m[i+ 0], 20, -373897302);
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a = GG(a, b, c, d, m[i+ 5], 5, -701558691);
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d = GG(d, a, b, c, m[i+10], 9, 38016083);
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c = GG(c, d, a, b, m[i+15], 14, -660478335);
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b = GG(b, c, d, a, m[i+ 4], 20, -405537848);
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a = GG(a, b, c, d, m[i+ 9], 5, 568446438);
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d = GG(d, a, b, c, m[i+14], 9, -1019803690);
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c = GG(c, d, a, b, m[i+ 3], 14, -187363961);
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b = GG(b, c, d, a, m[i+ 8], 20, 1163531501);
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a = GG(a, b, c, d, m[i+13], 5, -1444681467);
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d = GG(d, a, b, c, m[i+ 2], 9, -51403784);
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c = GG(c, d, a, b, m[i+ 7], 14, 1735328473);
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b = GG(b, c, d, a, m[i+12], 20, -1926607734);
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a = HH(a, b, c, d, m[i+ 5], 4, -378558);
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d = HH(d, a, b, c, m[i+ 8], 11, -2022574463);
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c = HH(c, d, a, b, m[i+11], 16, 1839030562);
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b = HH(b, c, d, a, m[i+14], 23, -35309556);
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a = HH(a, b, c, d, m[i+ 1], 4, -1530992060);
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d = HH(d, a, b, c, m[i+ 4], 11, 1272893353);
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c = HH(c, d, a, b, m[i+ 7], 16, -155497632);
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b = HH(b, c, d, a, m[i+10], 23, -1094730640);
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a = HH(a, b, c, d, m[i+13], 4, 681279174);
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d = HH(d, a, b, c, m[i+ 0], 11, -358537222);
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c = HH(c, d, a, b, m[i+ 3], 16, -722521979);
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b = HH(b, c, d, a, m[i+ 6], 23, 76029189);
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a = HH(a, b, c, d, m[i+ 9], 4, -640364487);
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d = HH(d, a, b, c, m[i+12], 11, -421815835);
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c = HH(c, d, a, b, m[i+15], 16, 530742520);
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b = HH(b, c, d, a, m[i+ 2], 23, -995338651);
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a = II(a, b, c, d, m[i+ 0], 6, -198630844);
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d = II(d, a, b, c, m[i+ 7], 10, 1126891415);
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c = II(c, d, a, b, m[i+14], 15, -1416354905);
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b = II(b, c, d, a, m[i+ 5], 21, -57434055);
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a = II(a, b, c, d, m[i+12], 6, 1700485571);
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d = II(d, a, b, c, m[i+ 3], 10, -1894986606);
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c = II(c, d, a, b, m[i+10], 15, -1051523);
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b = II(b, c, d, a, m[i+ 1], 21, -2054922799);
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a = II(a, b, c, d, m[i+ 8], 6, 1873313359);
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d = II(d, a, b, c, m[i+15], 10, -30611744);
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c = II(c, d, a, b, m[i+ 6], 15, -1560198380);
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b = II(b, c, d, a, m[i+13], 21, 1309151649);
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a = II(a, b, c, d, m[i+ 4], 6, -145523070);
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d = II(d, a, b, c, m[i+11], 10, -1120210379);
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c = II(c, d, a, b, m[i+ 2], 15, 718787259);
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b = II(b, c, d, a, m[i+ 9], 21, -343485551);
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a = (a + aa) >>> 0;
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b = (b + bb) >>> 0;
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c = (c + cc) >>> 0;
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d = (d + dd) >>> 0;
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}
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return crypt.endian([a, b, c, d]);
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};
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// Auxiliary functions
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md5._ff = function (a, b, c, d, x, s, t) {
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var n = a + (b & c | ~b & d) + (x >>> 0) + t;
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return ((n << s) | (n >>> (32 - s))) + b;
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};
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md5._gg = function (a, b, c, d, x, s, t) {
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var n = a + (b & d | c & ~d) + (x >>> 0) + t;
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return ((n << s) | (n >>> (32 - s))) + b;
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};
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md5._hh = function (a, b, c, d, x, s, t) {
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var n = a + (b ^ c ^ d) + (x >>> 0) + t;
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return ((n << s) | (n >>> (32 - s))) + b;
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};
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md5._ii = function (a, b, c, d, x, s, t) {
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var n = a + (c ^ (b | ~d)) + (x >>> 0) + t;
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return ((n << s) | (n >>> (32 - s))) + b;
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};
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// Package private blocksize
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md5._blocksize = 16;
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md5._digestsize = 16;
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module.exports = function (message, options) {
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if (message === undefined || message === null)
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throw new Error('Illegal argument ' + message);
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var digestbytes = crypt.wordsToBytes(md5(message, options));
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return options && options.asBytes ? digestbytes :
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options && options.asString ? bin.bytesToString(digestbytes) :
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crypt.bytesToHex(digestbytes);
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};
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})();
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