Password Regex

Question

I want to confirm the password. Below are my requirements.

Minimum Password Length: 8
Minimum Lower Case Character: 1
Minimum upper case characters: 1
Minimum number of numeric characters: 1

How to write a regex for this?

Answer 1

You can use the following regular expression:

^(?=.*[az])(?=.*[AZ])(?=.*[0-9]).{8,}$ 

Answer 2

I agree with @Russell, the function is the best choice for password verification. And it's hard to imagine that one Regex handles all of these cases. I think you will have to check each in turn.

In an individual expression of a Regex expression:

• .{8} matches at least 8 characters
• [az] matches one lowercase character
• [az] matches one uppercase character
• [0-9] matches the digit

As stated, they would only be useful for client-side validation before the server performs an in-depth validation.

Answer 3

Below you will find the regex for your requirements:

 (?=^.{8}$)((?=.*\d)|(?=.*\W+))(?![.\n])(?=.*[AZ])(?=.*[az]).*$