/**
	 * jQuery MD5 hash algorithm function
	 * 
	 * 	<code>
	 * 		Calculate the md5 hash of a String 
	 * 		String $.md5 ( String str )
	 * 	</code>
	 * 
	 * Calculates the MD5 hash of str using the » RSA Data Security, Inc. MD5 Message-Digest Algorithm, and returns that hash. 
	 * MD5 (Message-Digest algorithm 5) is a widely-used cryptographic hash function with a 128-bit hash value. MD5 has been employed in a wide variety of security applications, and is also commonly used to check the integrity of data. The generated hash is also non-reversable. Data cannot be retrieved from the message digest, the digest uniquely identifies the data.
	 * MD5 was developed by Professor Ronald L. Rivest in 1994. Its 128 bit (16 byte) message digest makes it a faster implementation than SHA-1.
	 * This script is used to process a variable length message into a fixed-length output of 128 bits using the MD5 algorithm. It is fully compatible with UTF-8 encoding. It is very useful when u want to transfer encrypted passwords over the internet. If you plan using UTF-8 encoding in your project don't forget to set the page encoding to UTF-8 (Content-Type meta tag). 
	 * This function orginally get from the WebToolkit and rewrite for using as the jQuery plugin.
	 * 
	 * Example
	 * 	Code
	 * 		<code>
	 * 			$.md5("I'm Persian."); 
	 * 		</code>
	 * 	Result
	 * 		<code>
	 * 			"b8c901d0f02223f9761016cfff9d68df"
	 * 		</code>
	 * 
	 * @alias Muhammad Hussein Fattahizadeh < muhammad [AT] semnanweb [DOT] com >
	 * @link http://www.semnanweb.com/jquery-plugin/md5.html
	 * @see http://www.webtoolkit.info/
	 * @license http://www.gnu.org/licenses/gpl.html [GNU General Public License]
	 * @param {jQuery} {md5:function(string))
	 * @return string
	 */
	
	(function($){
		
		var rotateLeft = function(lValue, iShiftBits) {
			return (lValue << iShiftBits) | (lValue >>> (32 - iShiftBits));
		}
		
		var addUnsigned = function(lX, lY) {
			var lX4, lY4, lX8, lY8, lResult;
			lX8 = (lX & 0x80000000);
			lY8 = (lY & 0x80000000);
			lX4 = (lX & 0x40000000);
			lY4 = (lY & 0x40000000);
			lResult = (lX & 0x3FFFFFFF) + (lY & 0x3FFFFFFF);
			if (lX4 & lY4) return (lResult ^ 0x80000000 ^ lX8 ^ lY8);
			if (lX4 | lY4) {
				if (lResult & 0x40000000) return (lResult ^ 0xC0000000 ^ lX8 ^ lY8);
				else return (lResult ^ 0x40000000 ^ lX8 ^ lY8);
			} else {
				return (lResult ^ lX8 ^ lY8);
			}
		}
		
		var F = function(x, y, z) {
			return (x & y) | ((~ x) & z);
		}
		
		var G = function(x, y, z) {
			return (x & z) | (y & (~ z));
		}
		
		var H = function(x, y, z) {
			return (x ^ y ^ z);
		}
		
		var I = function(x, y, z) {
			return (y ^ (x | (~ z)));
		}
		
		var FF = function(a, b, c, d, x, s, ac) {
			a = addUnsigned(a, addUnsigned(addUnsigned(F(b, c, d), x), ac));
			return addUnsigned(rotateLeft(a, s), b);
		};
		
		var GG = function(a, b, c, d, x, s, ac) {
			a = addUnsigned(a, addUnsigned(addUnsigned(G(b, c, d), x), ac));
			return addUnsigned(rotateLeft(a, s), b);
		};
		
		var HH = function(a, b, c, d, x, s, ac) {
			a = addUnsigned(a, addUnsigned(addUnsigned(H(b, c, d), x), ac));
			return addUnsigned(rotateLeft(a, s), b);
		};
		
		var II = function(a, b, c, d, x, s, ac) {
			a = addUnsigned(a, addUnsigned(addUnsigned(I(b, c, d), x), ac));
			return addUnsigned(rotateLeft(a, s), b);
		};
		
		var convertToWordArray = function(string) {
			var lWordCount;
			var lMessageLength = string.length;
			var lNumberOfWordsTempOne = lMessageLength + 8;
			var lNumberOfWordsTempTwo = (lNumberOfWordsTempOne - (lNumberOfWordsTempOne % 64)) / 64;
			var lNumberOfWords = (lNumberOfWordsTempTwo + 1) * 16;
			var lWordArray = Array(lNumberOfWords - 1);
			var lBytePosition = 0;
			var lByteCount = 0;
			while (lByteCount < lMessageLength) {
				lWordCount = (lByteCount - (lByteCount % 4)) / 4;
				lBytePosition = (lByteCount % 4) * 8;
				lWordArray[lWordCount] = (lWordArray[lWordCount] | (string.charCodeAt(lByteCount) << lBytePosition));
				lByteCount++;
			}
			lWordCount = (lByteCount - (lByteCount % 4)) / 4;
			lBytePosition = (lByteCount % 4) * 8;
			lWordArray[lWordCount] = lWordArray[lWordCount] | (0x80 << lBytePosition);
			lWordArray[lNumberOfWords - 2] = lMessageLength << 3;
			lWordArray[lNumberOfWords - 1] = lMessageLength >>> 29;
			return lWordArray;
		};
		
		var wordToHex = function(lValue) {
			var WordToHexValue = "", WordToHexValueTemp = "", lByte, lCount;
			for (lCount = 0; lCount <= 3; lCount++) {
				lByte = (lValue >>> (lCount * 8)) & 255;
				WordToHexValueTemp = "0" + lByte.toString(16);
				WordToHexValue = WordToHexValue + WordToHexValueTemp.substr(WordToHexValueTemp.length - 2, 2);
			}
			return WordToHexValue;
		};
		
		var uTF8Encode = function(string) {
			string = string.replace(/\x0d\x0a/g, "\x0a");
			var output = "";
			for (var n = 0; n < string.length; n++) {
				var c = string.charCodeAt(n);
				if (c < 128) {
					output += String.fromCharCode(c);
				} else if ((c > 127) && (c < 2048)) {
					output += String.fromCharCode((c >> 6) | 192);
					output += String.fromCharCode((c & 63) | 128);
				} else {
					output += String.fromCharCode((c >> 12) | 224);
					output += String.fromCharCode(((c >> 6) & 63) | 128);
					output += String.fromCharCode((c & 63) | 128);
				}
			}
			return output;
		};
		
		$.extend({
			md5: function(string) {
				var x = Array();
				var k, AA, BB, CC, DD, a, b, c, d;
				var S11=7, S12=12, S13=17, S14=22;
				var S21=5, S22=9 , S23=14, S24=20;
				var S31=4, S32=11, S33=16, S34=23;
				var S41=6, S42=10, S43=15, S44=21;
				string = uTF8Encode(string);
				x = convertToWordArray(string);
				a = 0x67452301; b = 0xEFCDAB89; c = 0x98BADCFE; d = 0x10325476;
				for (k = 0; k < x.length; k += 16) {
					AA = a; BB = b; CC = c; DD = d;
					a = FF(a, b, c, d, x[k+0],  S11, 0xD76AA478);
					d = FF(d, a, b, c, x[k+1],  S12, 0xE8C7B756);
					c = FF(c, d, a, b, x[k+2],  S13, 0x242070DB);
					b = FF(b, c, d, a, x[k+3],  S14, 0xC1BDCEEE);
					a = FF(a, b, c, d, x[k+4],  S11, 0xF57C0FAF);
					d = FF(d, a, b, c, x[k+5],  S12, 0x4787C62A);
					c = FF(c, d, a, b, x[k+6],  S13, 0xA8304613);
					b = FF(b, c, d, a, x[k+7],  S14, 0xFD469501);
					a = FF(a, b, c, d, x[k+8],  S11, 0x698098D8);
					d = FF(d, a, b, c, x[k+9],  S12, 0x8B44F7AF);
					c = FF(c, d, a, b, x[k+10], S13, 0xFFFF5BB1);
					b = FF(b, c, d, a, x[k+11], S14, 0x895CD7BE);
					a = FF(a, b, c, d, x[k+12], S11, 0x6B901122);
					d = FF(d, a, b, c, x[k+13], S12, 0xFD987193);
					c = FF(c, d, a, b, x[k+14], S13, 0xA679438E);
					b = FF(b, c, d, a, x[k+15], S14, 0x49B40821);
					a = GG(a, b, c, d, x[k+1],  S21, 0xF61E2562);
					d = GG(d, a, b, c, x[k+6],  S22, 0xC040B340);
					c = GG(c, d, a, b, x[k+11], S23, 0x265E5A51);
					b = GG(b, c, d, a, x[k+0],  S24, 0xE9B6C7AA);
					a = GG(a, b, c, d, x[k+5],  S21, 0xD62F105D);
					d = GG(d, a, b, c, x[k+10], S22, 0x2441453);
					c = GG(c, d, a, b, x[k+15], S23, 0xD8A1E681);
					b = GG(b, c, d, a, x[k+4],  S24, 0xE7D3FBC8);
					a = GG(a, b, c, d, x[k+9],  S21, 0x21E1CDE6);
					d = GG(d, a, b, c, x[k+14], S22, 0xC33707D6);
					c = GG(c, d, a, b, x[k+3],  S23, 0xF4D50D87);
					b = GG(b, c, d, a, x[k+8],  S24, 0x455A14ED);
					a = GG(a, b, c, d, x[k+13], S21, 0xA9E3E905);
					d = GG(d, a, b, c, x[k+2],  S22, 0xFCEFA3F8);
					c = GG(c, d, a, b, x[k+7],  S23, 0x676F02D9);
					b = GG(b, c, d, a, x[k+12], S24, 0x8D2A4C8A);
					a = HH(a, b, c, d, x[k+5],  S31, 0xFFFA3942);
					d = HH(d, a, b, c, x[k+8],  S32, 0x8771F681);
					c = HH(c, d, a, b, x[k+11], S33, 0x6D9D6122);
					b = HH(b, c, d, a, x[k+14], S34, 0xFDE5380C);
					a = HH(a, b, c, d, x[k+1],  S31, 0xA4BEEA44);
					d = HH(d, a, b, c, x[k+4],  S32, 0x4BDECFA9);
					c = HH(c, d, a, b, x[k+7],  S33, 0xF6BB4B60);
					b = HH(b, c, d, a, x[k+10], S34, 0xBEBFBC70);
					a = HH(a, b, c, d, x[k+13], S31, 0x289B7EC6);
					d = HH(d, a, b, c, x[k+0],  S32, 0xEAA127FA);
					c = HH(c, d, a, b, x[k+3],  S33, 0xD4EF3085);
					b = HH(b, c, d, a, x[k+6],  S34, 0x4881D05);
					a = HH(a, b, c, d, x[k+9],  S31, 0xD9D4D039);
					d = HH(d, a, b, c, x[k+12], S32, 0xE6DB99E5);
					c = HH(c, d, a, b, x[k+15], S33, 0x1FA27CF8);
					b = HH(b, c, d, a, x[k+2],  S34, 0xC4AC5665);
					a = II(a, b, c, d, x[k+0],  S41, 0xF4292244);
					d = II(d, a, b, c, x[k+7],  S42, 0x432AFF97);
					c = II(c, d, a, b, x[k+14], S43, 0xAB9423A7);
					b = II(b, c, d, a, x[k+5],  S44, 0xFC93A039);
					a = II(a, b, c, d, x[k+12], S41, 0x655B59C3);
					d = II(d, a, b, c, x[k+3],  S42, 0x8F0CCC92);
					c = II(c, d, a, b, x[k+10], S43, 0xFFEFF47D);
					b = II(b, c, d, a, x[k+1],  S44, 0x85845DD1);
					a = II(a, b, c, d, x[k+8],  S41, 0x6FA87E4F);
					d = II(d, a, b, c, x[k+15], S42, 0xFE2CE6E0);
					c = II(c, d, a, b, x[k+6],  S43, 0xA3014314);
					b = II(b, c, d, a, x[k+13], S44, 0x4E0811A1);
					a = II(a, b, c, d, x[k+4],  S41, 0xF7537E82);
					d = II(d, a, b, c, x[k+11], S42, 0xBD3AF235);
					c = II(c, d, a, b, x[k+2],  S43, 0x2AD7D2BB);
					b = II(b, c, d, a, x[k+9],  S44, 0xEB86D391);
					a = addUnsigned(a, AA);
					b = addUnsigned(b, BB);
					c = addUnsigned(c, CC);
					d = addUnsigned(d, DD);
				}
				var tempValue = wordToHex(a) + wordToHex(b) + wordToHex(c) + wordToHex(d);
				return tempValue.toLowerCase();
			}
		});
	})(jQuery);