Subversion Repositories Applications.papyrus

/*	Return to a port of Paul Johnstone's MD5 implementation

 *	http://pajhome.org.uk/crypt/md5/index.html

 *

 *	Copyright (C) Paul Johnston 1999 - 2002.

 *	Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet

 * 	Distributed under the BSD License

 *

 *	Dojo port by Tom Trenka

 *

 *	2005-12-7

 *	All conversions are internalized (no dependencies)

 *	implemented getHMAC for message digest auth.

 */

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));

		}

	};

}();