Click here for Live demo of Javascript password generator
The code :
<script language="javascript">
<!-- //hide
// Javascript password generator
// By moshahmed,
// 1 Based on http://www.weberdev.com/get_example-3338.html
// JSPassGen v2.1 by Ummon <jeffhawke@iname.com>
// 2 Based on Jpass v1.1 (Kelv 2000 kelv@kelv.net)
// http://freshmeat.net/projects/jpass/
var randu_seed; // hex string = MD5(passwords).
var randu_index = 0;
function randu_setup(seed) {
document.pswd4.pass4hash.value=randu_seed=seed;
randu_index = 0;
}
function randu(min,max) { // return in [min..max-1]
if (!randu_seed) {
return min + Math.floor(Math.random()*(max-min));
} else {
var range = max - min;
if (range <= 1) { // avoid % dividing by zero.
return min;
}
var hexlen = 1; // was: Math.ceil(Math.log(range)/Math.log(16));
var hexit = randu_seed.substr(randu_index, 4);
randu_index = (randu_index + hexlen) % randu_seed.length;
var pran = parseInt(hexit,16);
var prani = min + pran % range;
// console.debug(hexit, min,max,prani);
return prani;
}
};
function pickonefrom(arr) { // Return random number for indexing arr.
return randu(0, arr.length);
};
function pickone(arr) { // pick one from array of arg;
return arr[pickonefrom(arr)];
};
function normalRandom() {
var sum = 0;
for(var i=0;i<12;i++) {
sum += Math.random();
}
return (sum - 6.0)/6.0
};
function expandChoices(str, frac) {
// Context free phrase generator.
// Usage:
// expandChoices("(1|2)(a|b)",0) = "1a"
// expandChoices("(1|2)(a|b)",1) = "2b"
// Args:
// str: is parethesized expression with choices,
// frac: 0..1 to pick a particular choice, or -1 for random pick.
// Also see: ../pascal/slib.pas:125:select
// console.debug("expandChoices '%s'.", str);
var lp, rp;
var lchar = '(', rchar = ')', spliton = '|'; // could be {,}.
// recursively remove all parenthesis, starting with innermost.
// how: find the first close parent, scan back for matching open paren.
while ((rp = str.indexOf(rchar)) != -1) {
lp = str.substr(0,rp).lastIndexOf(lchar);
if (lp != -1) {
var left = str.substr(0,lp);
var mid = str.substr(lp+1, rp-lp-1);
var right = str.substr(rp+1);
str = left + expandChoices(mid, frac) + right;
} else {
console.debug("error: missing lchar=%s in '%s'.", lchar, str);
return "";
}
}
if( (lp = str.lastIndexOf(lchar)) != -1) {
console.debug("error: missing rchar=%s in '%s'.", rchar, str);
return "";
}
// Split "a|b|c" and return one of the elements.
if (str.indexOf(spliton) != -1) {
var arr = str.split(spliton);
if (arr.length < 1) {
return "";
}
// If frac is given, use it, otherwise pickone randomly.
if (0 <= frac && frac <= 1) {
var idx = Math.floor(frac * arr.length);
if (idx < 0) idx = 0;
if (idx >= arr.length) idx = arr.length-1;
str = arr[idx];
} else {
str = pickone(arr);
}
}
return str;
};
function mkpass(pass_len, num_letters, num_digits, num_separators, char_separators, seed) {
// Make and return a password, that is pass_len long, containing
// num_letters, num_digits, num_separators from char_separators.
var digits = '123456789';
var vowels = 'aeiou';
var consonants = 'bcdfghjklmnpqrstvwxyz';
var CONSONANTS = consonants.toUpperCase();
var VOWELS = vowels.toUpperCase();
var charsets = [consonants, CONSONANTS, vowels, VOWELS];
var ps= '';
randu_setup(seed);
// Add some 4 chars syllables.
while(num_letters > 0){
ps += pickone(CONSONANTS); if (--num_letters <1) break;
ps += pickone(vowels); if (--num_letters <1) break;
ps += pickone(consonants); if (--num_letters <1) break;
ps += pickone(vowels); if (--num_letters <1) break;
}
// Add separators.
while (num_separators-- > 0) {
ps += pickone(char_separators);
}
// Add digits.
while(num_digits-- > 0){
ps += pickone(digits);
}
// Pad to pass_len.
while(ps.length < pass_len) {
if (char_separators.length > 0) {
ps += pickone(char_separators);
} else {
var charset = pickone(charsets);
ps += pickone(charset);
}
}
// Truncate to pass_len.
if (ps.length > pass_len) {
ps = ps.substr(0,pass_len);
}
return ps;
};
var MD5 = function(string) {
/**
* http://www.webtoolkit.info/javascript-md5.html
* MD5 (Message-Digest Algorithm)
* http://www.webtoolkit.info/
*
**/
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 lNumberOfWords_temp2=(lNumberOfWords_temp1-(lNumberOfWords_temp1 % 64))/64;
var lNumberOfWords = (lNumberOfWords_temp2+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;
};
function WordToHex(lValue) {
var WordToHexValue="",WordToHexValue_temp="",lByte,lCount;
for (lCount = 0;lCount<=3;lCount++) {
lByte = (lValue>>>(lCount*8)) & 255;
WordToHexValue_temp = "0" + lByte.toString(16);
WordToHexValue = WordToHexValue + WordToHexValue_temp.substr(WordToHexValue_temp.length-2,2);
}
return WordToHexValue;
};
function Utf8Encode(string) {
string = string.replace(/ /g," ");
var utftext = "";
for (var n = 0; n < string.length; n++) {
var c = string.charCodeAt(n);
if (c < 128) {
utftext += String.fromCharCode(c);
}
else if((c > 127) && (c < 2048)) {
utftext += String.fromCharCode((c >> 6) | 192);
utftext += String.fromCharCode((c & 63) | 128);
}
else {
utftext += String.fromCharCode((c >> 12) | 224);
utftext += String.fromCharCode(((c >> 6) & 63) | 128);
utftext += String.fromCharCode((c & 63) | 128);
}
}
return utftext;
};
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;
//console.debug('string='+string+'.');
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 temp = WordToHex(a)+WordToHex(b)+WordToHex(c)+WordToHex(d);
return temp.toLowerCase();
};
// -->
</script>