JS password generation and strength detection complete example (with demo source download) _javascript Tips

This article describes the JS password generation and strength detection methods. Share to everyone for your reference, specific as follows:

1. Generate Strong passwords

Screenshot below:

The relevant code is as follows:

function Getpwd (n)
{
 var s = ';
 while (n--)
 s + + string.fromcharcode (+ Math.floor (Math.random () * (126-33)))
 document.getElementById (' Txt1 '). Value = S;
}

2. Calculate Password cracking time

Screenshot below:

The relevant code is as follows:

function GetTime ()
{
 var str = ' expected cracked: ';
 var Selchar = document.getElementById (' Selchar ');
 var Txtpwdlen = document.getElementById (' Txtpwdlen ');
 var num = Math.pow (parseint (Selchar.value), parseint (Txtpwdlen.value));
 str = formattime (num/(1024*1024*1024*2.4*2));
 document.getElementById (' span2 '). InnerHTML = str;
function Formattime (s)
{
 var str = ';
 if (s<1) return ' less than 1 seconds! ';
 s = Math.floor (s);
 if (S >= 1) str = s% 60 + ' sec ' + str;
 s = Math.floor (S/60);
 if (S >= 1) str = s% 60 + ' min ' + str;
 s = Math.floor (S/60);
 if (S >= 1) str = s% 24 + ' when ' + str;
 s = Math.floor (S/24);
 if (S >= 1) str = s + ' Day ' + str;
 return str;
}

3. Password Security detection

Screenshot below:

The relevant code is as follows:

function Showpwd () {var p = document.getElementById (' txt2 '). Value; if (P.length < 4) {ShowError (' password at least 4 bits!)
    ');
  Return
  var o = checkpwd (p); if (o.issame) {showerror (' password is a repeating character!)
    ');
  Return for (var i=0 i<arrpwd.length; i++) {if (arrpwd[i] = = P | | arrpwd[i].indexof (P) = 0) {showerror (' secret Code is 100 big common password!
      ');
    Return
  } var year = parseint (P.substr (0,4));
    if (!isnan (year) && year>1900 && year<2100) {var month = parseint (P.substr (4,2));
      if (!isnan (month) && month>0 && month<13) {var day = parseint (P.substr (6,2)); if (!isnan (day) && day>0 && day<32) {showerror (' Do not use a date as a password!)
        ');
      Return
  }} var hasupper = false;
  var haslow = false;
  var hasnum = false;
  var hasother = false;
    for (var i=0; i<p.length; i++) {var c = p.charcodeat (i);
    if (c>=65&&c<=90) hasupper=true; ELSE if (c>=97&&c<=122) haslow=true;
    else if (c>=48&&c<=57) hasnum=true;
  else hasother=true;
  } var pwdnum = 0;
  if (hasupper) pwdnum+=26;
  if (Haslow) pwdnum+=26;
  if (hasnum) pwdnum+=10;
  if (hasother) pwdnum+=32;
  var num = Math.pow (pwdnum, p.length);
  var str = ' Password length: ' + p.length + ' strength: ' + Pwdnum + ' is expected to crack when: ' + formattime (num/(1024*1024*1024*2.4*2));
  var span1 = document.getElementById (' span1 ');
  Span1.style.color = ' Blue ';
span1.innerhtml = str;

 }

4. Detect whether the keyboard caps lock (Caps lock key State)

Screenshot below:

The relevant code is as follows:

var $lock = false;
function Checkcapslock (FN)
{
 document.documentElement.onkeypress = function (e)
 {
  var e = e | | | event;
  var k = E.keycode | | E.which;
  var s = E.shiftkey | | (k = = 16) | | false;
  if (k>=65&&k<=90) $lock =!s;
  if (k>=97&&k<=122) $lock =s;
  FN ($lock);
 Document.documentElement.onkeyup = function (e)
 {
  var e = e | | | event;
  var k = E.keycode | | E.which;
  if (k==20) $lock =! $lock;
  FN ($lock);
 }
}

Full instance code click here to download the site.

More readers interested in JavaScript-related content can view the site topics: "JavaScript switching effects and tips summary", "JavaScript Search Algorithm Skills Summary", "JavaScript animation effects and tips summary", " JavaScript error and debugging skills Summary, JavaScript data structure and algorithm skills summary, JavaScript traversal algorithm and skills summary and JavaScript mathematical calculation usage Summary

PS: Readers interested in the password can also refer to the site password-related tools:

Password Security online detection

High Strength Password Generator

MD5 Online Encryption Tool

Online generation of HTPASSWD tools

URL Web 16 Encryption tool

Escape Encryption/Decryption tool

Thunderbolt, Express, Cyclone URL encryption/decryption tool

I hope this article will help you with JavaScript programming.