md5.js

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/*
	Copyright (c) 2004-2006, The Dojo Foundation
	All Rights Reserved.

	Licensed under the Academic Free License version 2.1 or above OR the
	modified BSD license. For more information on Dojo licensing, see:

		http://dojotoolkit.org/community/licensing.shtml
*/



dojo.require("dojo.crypto");
dojo.provide("dojo.crypto.MD5");
dojo.crypto.MD5 = new function () {
	var chrsz = 8;
	var mask = (1 << chrsz) - 1;
	function toWord(s) {
		var wa = [];
		for (var i = 0; i < s.length * chrsz; i += chrsz) {
			wa[i >> 5] |= (s.charCodeAt(i / chrsz) & mask) << (i % 32);
		}
		return wa;
	}
	function toString(wa) {
		var s = [];
		for (var i = 0; i < wa.length * 32; i += chrsz) {
			s.push(String.fromCharCode((wa[i >> 5] >>> (i % 32)) & mask));
		}
		return s.join("");
	}
	function toHex(wa) {
		var h = "0123456789abcdef";
		var s = [];
		for (var i = 0; i < wa.length * 4; i++) {
			s.push(h.charAt((wa[i >> 2] >> ((i % 4) * 8 + 4)) & 15) + h.charAt((wa[i >> 2] >> ((i % 4) * 8)) & 15));
		}
		return s.join("");
	}
	function toBase64(wa) {
		var p = "=";
		var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
		var s = [];
		for (var i = 0; i < wa.length * 4; i += 3) {
			var t = (((wa[i >> 2] >> 8 * (i % 4)) & 255) << 16) | (((wa[i + 1 >> 2] >> 8 * ((i + 1) % 4)) & 255) << 8) | ((wa[i + 2 >> 2] >> 8 * ((i + 2) % 4)) & 255);
			for (var j = 0; j < 4; j++) {
				if (i * 8 + j * 6 > wa.length * 32) {
					s.push(p);
				} else {
					s.push(tab.charAt((t >> 6 * (3 - j)) & 63));
				}
			}
		}
		return s.join("");
	}
	function add(x, y) {
		var l = (x & 65535) + (y & 65535);
		var m = (x >> 16) + (y >> 16) + (l >> 16);
		return (m << 16) | (l & 65535);
	}
	function R(n, c) {
		return (n << c) | (n >>> (32 - c));
	}
	function C(q, a, b, x, s, t) {
		return add(R(add(add(a, q), add(x, t)), s), b);
	}
	function FF(a, b, c, d, x, s, t) {
		return C((b & c) | ((~b) & d), a, b, x, s, t);
	}
	function GG(a, b, c, d, x, s, t) {
		return C((b & d) | (c & (~d)), a, b, x, s, t);
	}
	function HH(a, b, c, d, x, s, t) {
		return C(b ^ c ^ d, a, b, x, s, t);
	}
	function II(a, b, c, d, x, s, t) {
		return C(c ^ (b | (~d)), a, b, x, s, t);
	}
	function core(x, len) {
		x[len >> 5] |= 128 << ((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 = FF(a, b, c, d, x[i + 0], 7, -680876936);
			d = FF(d, a, b, c, x[i + 1], 12, -389564586);
			c = FF(c, d, a, b, x[i + 2], 17, 606105819);
			b = FF(b, c, d, a, x[i + 3], 22, -1044525330);
			a = FF(a, b, c, d, x[i + 4], 7, -176418897);
			d = FF(d, a, b, c, x[i + 5], 12, 1200080426);
			c = FF(c, d, a, b, x[i + 6], 17, -1473231341);
			b = FF(b, c, d, a, x[i + 7], 22, -45705983);
			a = FF(a, b, c, d, x[i + 8], 7, 1770035416);
			d = FF(d, a, b, c, x[i + 9], 12, -1958414417);
			c = FF(c, d, a, b, x[i + 10], 17, -42063);
			b = FF(b, c, d, a, x[i + 11], 22, -1990404162);
			a = FF(a, b, c, d, x[i + 12], 7, 1804603682);
			d = FF(d, a, b, c, x[i + 13], 12, -40341101);
			c = FF(c, d, a, b, x[i + 14], 17, -1502002290);
			b = FF(b, c, d, a, x[i + 15], 22, 1236535329);
			a = GG(a, b, c, d, x[i + 1], 5, -165796510);
			d = GG(d, a, b, c, x[i + 6], 9, -1069501632);
			c = GG(c, d, a, b, x[i + 11], 14, 643717713);
			b = GG(b, c, d, a, x[i + 0], 20, -373897302);
			a = GG(a, b, c, d, x[i + 5], 5, -701558691);
			d = GG(d, a, b, c, x[i + 10], 9, 38016083);
			c = GG(c, d, a, b, x[i + 15], 14, -660478335);
			b = GG(b, c, d, a, x[i + 4], 20, -405537848);
			a = GG(a, b, c, d, x[i + 9], 5, 568446438);
			d = GG(d, a, b, c, x[i + 14], 9, -1019803690);
			c = GG(c, d, a, b, x[i + 3], 14, -187363961);
			b = GG(b, c, d, a, x[i + 8], 20, 1163531501);
			a = GG(a, b, c, d, x[i + 13], 5, -1444681467);
			d = GG(d, a, b, c, x[i + 2], 9, -51403784);
			c = GG(c, d, a, b, x[i + 7], 14, 1735328473);
			b = GG(b, c, d, a, x[i + 12], 20, -1926607734);
			a = HH(a, b, c, d, x[i + 5], 4, -378558);
			d = HH(d, a, b, c, x[i + 8], 11, -2022574463);
			c = HH(c, d, a, b, x[i + 11], 16, 1839030562);
			b = HH(b, c, d, a, x[i + 14], 23, -35309556);
			a = HH(a, b, c, d, x[i + 1], 4, -1530992060);
			d = HH(d, a, b, c, x[i + 4], 11, 1272893353);
			c = HH(c, d, a, b, x[i + 7], 16, -155497632);
			b = HH(b, c, d, a, x[i + 10], 23, -1094730640);
			a = HH(a, b, c, d, x[i + 13], 4, 681279174);
			d = HH(d, a, b, c, x[i + 0], 11, -358537222);
			c = HH(c, d, a, b, x[i + 3], 16, -722521979);
			b = HH(b, c, d, a, x[i + 6], 23, 76029189);
			a = HH(a, b, c, d, x[i + 9], 4, -640364487);
			d = HH(d, a, b, c, x[i + 12], 11, -421815835);
			c = HH(c, d, a, b, x[i + 15], 16, 530742520);
			b = HH(b, c, d, a, x[i + 2], 23, -995338651);
			a = II(a, b, c, d, x[i + 0], 6, -198630844);
			d = II(d, a, b, c, x[i + 7], 10, 1126891415);
			c = II(c, d, a, b, x[i + 14], 15, -1416354905);
			b = II(b, c, d, a, x[i + 5], 21, -57434055);
			a = II(a, b, c, d, x[i + 12], 6, 1700485571);
			d = II(d, a, b, c, x[i + 3], 10, -1894986606);
			c = II(c, d, a, b, x[i + 10], 15, -1051523);
			b = II(b, c, d, a, x[i + 1], 21, -2054922799);
			a = II(a, b, c, d, x[i + 8], 6, 1873313359);
			d = II(d, a, b, c, x[i + 15], 10, -30611744);
			c = II(c, d, a, b, x[i + 6], 15, -1560198380);
			b = II(b, c, d, a, x[i + 13], 21, 1309151649);
			a = II(a, b, c, d, x[i + 4], 6, -145523070);
			d = II(d, a, b, c, x[i + 11], 10, -1120210379);
			c = II(c, d, a, b, x[i + 2], 15, 718787259);
			b = II(b, c, d, a, x[i + 9], 21, -343485551);
			a = add(a, olda);
			b = add(b, oldb);
			c = add(c, oldc);
			d = add(d, oldd);
		}
		return [a, b, c, d];
	}
	function hmac(data, key) {
		var wa = toWord(key);
		if (wa.length > 16) {
			wa = core(wa, key.length * chrsz);
		}
		var l = [], r = [];
		for (var i = 0; i < 16; i++) {
			l[i] = wa[i] ^ 909522486;
			r[i] = wa[i] ^ 1549556828;
		}
		var h = core(l.concat(toWord(data)), 512 + data.length * chrsz);
		return core(r.concat(h), 640);
	}
	this.compute = function (data, outputType) {
		var out = outputType || dojo.crypto.outputTypes.Base64;
		switch (out) {
		  case dojo.crypto.outputTypes.Hex:
			return toHex(core(toWord(data), data.length * chrsz));
		  case dojo.crypto.outputTypes.String:
			return toString(core(toWord(data), data.length * chrsz));
		  default:
			return toBase64(core(toWord(data), data.length * chrsz));
		}
	};
	this.getHMAC = function (data, key, outputType) {
		var out = outputType || dojo.crypto.outputTypes.Base64;
		switch (out) {
		  case dojo.crypto.outputTypes.Hex:
			return toHex(hmac(data, key));
		  case dojo.crypto.outputTypes.String:
			return toString(hmac(data, key));
		  default:
			return toBase64(hmac(data, key));
		}
	};
}();