> Abigail <[EMAIL PROTECTED]> writes:
>
> > 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;
Hi all,
A possible improvement is to ensure that a limited set of
characters are accepted. For example, characters in the
ASCII range 0-31 make difficult to type passwords. This
does substantially reduce the number of possible passwords.
/^(?=.{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.
[-_a-zA-Z0-9]*$ # Acceptable characters
/xs;
This may implement an optional extension of item 5:
...it can cover for accepted non-alphanumeric chars
such as "_", "-" etc (but not "#"), ...
Jonathan Paton
=====
#!perl
$J=' 'x25 ;for (qq< 1+10 9+14 5-10 50-9 7+13 2-18 6+13
17+6 02+1 2-10 00+4 00+8 3-13 3+12 01-5 2-10 01+1 03+4
00+4 00+8 1-21 01+1 00+5 01-7 >=~/ \S\S \S\S /gx) {m/(
\d+) (.+) /x,, vec$ J,$p +=$2 ,8,= $c+= +$1} warn $J,,
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