Regex for Ascii only

Question

I'm trying to develop a regex for password validation that requires the following criteria,

I came up with this lookahead regex but unfortunately it doesn't seem to work with non-ascii characters.

^(?=.*[A-Z])(?=.*\d)(?=[\x20-\x7E]).{8,45}$

Tested on,

ABCD1234abcd!" #$%&'()*+,-./:;<=>?@[\]^_`{|}~

However, doesn't seem to work with non-ascii characters i.e. it still matches the non-ascii characters despite of \x20-\x7E,

ABCD1234abcd!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~£

Notice that I do want to include the whitespace as well.

Anything obvious that I'm doing wrong here ?

You should read [Reference - Password Validation](https://stackoverflow.com/questions/48345922/reference-password-validation) — ctwheels, May 30 '18 at 15:37

score 3 · Accepted Answer · edited May 12 '18 at 00:05

3

Your regex allows any character via the dot .. Your look ahead only required the first character to be ascii.

Change the dot to your ascii range:

^(?=.*[A-Z])(?=.*\d)[\x20-\x7E]{8,45}$

edited May 12 '18 at 00:05

revo

answered May 11 '18 at 23:55

Bohemian

1 Answers1