/*
name: workspace.security.md5
extends: workspace.security
extends: workspace.encoding
*/
workspace.security.md5 = {}
workspace.security.md5._construct = function()
{
	
	/*
	* 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.org.uk/crypt/md5 for more info.
	*/

	/*
	* Configurable variables. You may need to tweak these to be compatible with
	* the server-side, but the defaults work in most cases.
	*/
	var chrsz = workspace.encoding.chrsz;  /* bits per input character. 8 - ASCII; 16 - Unicode      */

	/*
	* These are the functions you'll usually want to call
	* They take string arguments and return either hex or base-64 encoded strings
	*/
	this.toHex = function(s){ return workspace.encoding.binl2hex(common_md5(s));}
	this.toB64 = function(s){ return workspace.encoding.binl2b64(common_md5(s));}
	this.toStr = function(s){ return workspace.encoding.binl2str(common_md5(s));}
	
	function common_md5(s) { return core_md5(workspace.encoding.str2binl(s), s.length * chrsz); }
	
	this.hmac = {}
	this.hmac.toHex = function(key, data) { return workspace.encoding.binl2hex(core_hmac_md5(key, data)); }
	this.hmac.toB64 = function(key, data) { return workspace.encoding.binl2b64(core_hmac_md5(key, data)); }
	this.hmac.toStr = function(key, data) { return workspace.encoding.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") == "900150983cd24fb0d6963f7d28e17f72";
	}

	/*
	* Calculate the MD5 of an array of little-endian words, and a bit length
	*/
	function core_md5(x, len)
	{
		/* append padding */
		x[len >> 5] |= 0x80 << ((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 = 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(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 > 16) bkey = core_md5(bkey, key.length * chrsz);

		var ipad = Array(16), opad = Array(16);
		for(var i = 0; i < 16; i++)
		{
			ipad[i] = bkey[i] ^ 0x36363636;
			opad[i] = bkey[i] ^ 0x5C5C5C5C;
		}

		var hash = core_md5(ipad.concat(str2binl(data)), 512 + 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 >> 16) + (y >> 16) + (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));
	}	
	
}
workspace.security.md5._construct()