JavaScript下正则表达式密码强度验证

2008年03月03日 星期一 上午 10:09

在用户注册时，为了最大化的协助用户设置安全有效的密码，往往会加一个密码强度验证，下面是一个由正则表达式对密码的验证，返回长度代表密码强度。

var getStrength = function(passwd) {

intScore = 0;

if (passwd.match(/[a-z]/)) // [verified] at least one lower case letter

{

intScore = (intScore+1)

} if (passwd.match(/[A-Z]/)) // [verified] at least one upper case letter

{

intScore = (intScore+5)

} // NUMBERS

if (passwd.match(/\d+/)) // [verified] at least one number

{

intScore = (intScore+5)

} if (passwd.match(/(\d.*\d.*\d)/)) // [verified] at least three numbers

{

intScore = (intScore+5)

} // SPECIAL CHAR

if (passwd.match(/[!,@#$%^&*?_~]/)) // [verified] at least one special character

{

intScore = (intScore+5)

} if (passwd.match(/([!,@#$%^&*?_~].*[!,@#$%^&*?_~])/)) // [verified] at least two special characters

{

intScore = (intScore+5)

} // COMBOS

if (passwd.match(/[a-z]/) && passwd.match(/[A-Z]/)) // [verified] both upper and lower case

{

intScore = (intScore+2)

} if (passwd.match(/\d/) && passwd.match(/\D/)) // [verified] both letters and numbers

{

intScore = (intScore+2)

} // [Verified] Upper Letters, Lower Letters, numbers and special characters

if (passwd.match(/[a-z]/) && passwd.match(/[A-Z]/) && passwd.match(/\d/) && passwd.match(/[!,@#$%^&*?_~]/))

{

intScore = (intScore+2)

}

return intScore;

}