On Mon, Feb 17, 2003 at 07:40:46PM -0000, Matt Groves wrote:
>
> Hello,
>
> I'm looking for the shortest, cleverest possible solution to this. When
> changing a password, I need a RegExp which will ensure the following
> criteria :
>
> 1. It must be at least 6 characters
>
> 2. It must contain at least one lower case letter [a-z]
>
> 3. It must contain at least one upper case letter [A-Z]
>
> 4. It must contain at least one number [0-9]
>
> 5. Optionally, it can cover for accepted non-alphanumeric chars such as
> "_", "-" etc (but not "#"), and a maximum password length of 14
> characters
I'm not going to claim this is the shortest solution, but this
is very straightforward (and untested):
/^(?=.{6}) # At least 6 characters long.
(?=.*[a-z]) # Contains a lowercase letter.
(?=.*[A-Z]) # Contains an uppercase letter.
(?=.*[0-9]) # Contains a digit.
(?=.*[-_]) # Contains a dash or an underscore.
(?!.{15}) # Doesn't contain 15 characters.
/xs;
It's easy to add more requirements.
Abigail
