Home > Web Front-end > JS Tutorial > body text

Complete example of JS password generation and strength detection (with demo source code download)

WBOY
Release: 2018-09-27 10:33:33
Original
1842 people have browsed it

The example in this article describes the method of JS password generation and strength detection. Share it with everyone for your reference, the details are as follows:

1. Generate a strong password

The screenshot is as follows:

The relevant codes are as follows:

function getPwd(n)
{
 var s = '';
 while(n--)
 s += String.fromCharCode(33 + Math.floor(Math.random()*(126-33)))
 document.getElementById('txt1').value = s;
}
Copy after login

2. Calculate the password cracking time

The screenshot is as follows:

The relevant code is as follows:

function getTime()
{
 var str = '预计破解用时:';
 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) str = s % 60 + '秒' + str;
 s = Math.floor(s / 60);
 if(s >= 1) str = s % 60 + '分' + str;
 s = Math.floor(s / 60);
 if(s >= 1) str = s % 24 + '时' + str;
 s = Math.floor(s / 24);
 if(s >= 1) str = s + '天' + str;
 return str;
}
Copy after login

3. Password security detection

The screenshot is as follows:

The relevant code is as follows:

function showPwd()
{
  var p = document.getElementById('txt2').value;
  if(p.length < 4)
  {
    showError(&#39;密码至少4位!&#39;);
    return;
  }
  var o = checkPwd(p);
  if(o.isSame)
  {
    showError(&#39;密码为重复字符!&#39;);
    return;
  }
  for(var i=0; i1900 && year0 && month0 && day<32)
      {
        showError(&#39;不要使用日期作为密码!&#39;);
        return;
      }
    }
  }
  var hasUpper = false;
  var hasLow = false;
  var hasNum = false;
  var hasOther = false;
  for(var i=0; i=65&&c=97&&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 = &#39;密码长度:&#39; + p.length + &#39; 强度:&#39; + pwdNum + &#39; 预计破解用时:&#39; + formatTime(num / (1024*1024*1024*2.4*2));
  var span1 = document.getElementById(&#39;span1&#39;);
  span1.style.color = &#39;blue&#39;;
  span1.innerHTML = str;
}
Copy after login

4. Detect whether the keyboard is caps locked (Caps Lock key status)

The screenshot is as follows:

The relevant code is as follows:

var $lock = false;
function checkCapsLock(fn)
{
 document.documentElement.onkeypress = function(e)
 {
  var e = e || event;
  var k = e.keyCode || e.which;
  var s = e.shiftKey || (k == 16) || false;
  if(k>=65&&k=97&&k<=122)$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);
 }
}
Copy after login
Related labels:
js
source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template