Regex pattern for validating password

[Dinh Hong Chau]

Hi,
I am working with a small issue, but I don't know how to solve it clearly. I have to validate a generated password, with some constraints:
- password length: [8, 24]
- password contains
+ at least 1 lower case character
+ at least 1 upper case character
+ at least 1 digit
+ at least 1 special character (printable based on ASCII code)
I've used Regex pattern, but it didn't work correctly with both cases: valid and invalid.

The first RegEx pattern: def pattern = /(=?.{8,24})((:?[a-z]+)(:?[0-9]+)(:?[A-Z]+)(:?\W+))/ can check all invalid passwords but not for the valid one.
The second RegEx pattern: def pattern = /(=?.{8,24})((:?[a-z]*)(:?[0-9]*)(:?[A-Z]*)(:?\W*))/ can check all valid passwords but not for the invalid one.
I am new to Groovy, so I don't know how to create the correct RegEx pattern to solve this.
Could you please help me?
Thank you very much.

[Oscar Hansen]

Have you tried using custom validators for a password field? I was running into a similar issue once and using custom validators did resolve my issue.