jQuery: complete random password generator (including MD5 encoding)

by gabrieleromanato

HTML

<form action="" method="post" id="generator">
    <select id="length">
        <option selected="selected" disabled="disabled">Choose a length</option>
        <option value="13">13</option>
        <option value="26">26</option>
        <option value="39">39</option>
        <option value="52">52</option>
        <option value="65">65</option>
</select>
<label><input type="checkbox" id="md5" />Encode in MD5</label>
<input type="submit" value="Generate" />
</form>

<div id="output"></div>

CSS

#generator, #output {
    margin: 1em 2em;
}

#output {
    font-family: monospace;
    background: #ccc;
}

JavaScript

(function($) {

    $.md5 = function (string) {

   function RotateLeft(lValue, iShiftBits) {
           return (lValue<<iShiftBits) | (lValue>>>(32-iShiftBits));
   }

   function AddUnsigned(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);
           }
   }

   function F(x,y,z) { return (x & y) | ((~x) & z); }
   function G(x,y,z) { return (x & z) | (y & (~z)); }
   function H(x,y,z) { return (x ^ y ^ z); }
   function I(x,y,z) { return (y ^ (x | (~z))); }

   function FF(a,b,c,d,x,s,ac) {
           a = AddUnsigned(a, AddUnsigned(AddUnsigned(F(b, c, d), x), ac));
           return AddUnsigned(RotateLeft(a, s), b);
   };

   function GG(a,b,c,d,x,s,ac) {
           a = AddUnsigned(a, AddUnsigned(AddUnsigned(G(b, c, d), x), ac));
           return AddUnsigned(RotateLeft(a, s), b);
   };

   function HH(a,b,c,d,x,s,ac) {
           a = AddUnsigned(a, AddUnsigned(AddUnsigned(H(b, c, d), x), ac));
           return AddUnsigned(RotateLeft(a, s), b);
   };

   function II(a,b,c,d,x,s,ac) {
           a = AddUnsigned(a, AddUnsigned(AddUnsigned(I(b, c, d), x), ac));
           return AddUnsigned(RotateLeft(a, s), b);
   };

   function ConvertToWordArray(string) {
           var lWordCount;
           var lMessageLength = string.length;
           var lNumberOfWords_temp1=lMessageLength + 8;
           var...