/**
   * 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);