Password(3) User Contributed Perl Documentation Password(3)NAMEData::Password - Perl extension for assesing password quality.
SYNOPSIS
use Data::Passwordqw(IsBadPassword);
print IsBadPassword("clearant");
# Bad password - contains the word 'clear', only lowercase
use Data::Password qw(:all);
$DICTIONARY = 0;
$GROUPS = 0;
print IsBadPassword("clearant");
DESCRIPTION
This modules checks potential passwords for crackability. It checks
that the password is in the appropriate length, that it has enough
character groups, that it does not contain the same chars repeatedly or
ascending or descending characters, or charcters close to each other in
the keyboard. It will also attempt to search the ispell word file for
existance of whole words. The module's policies can be modified by
changing its variables. (Check "VARIABLES"). For doing it, it is
recommended to import the ':all' shortcut when requiring it:
use Data::Password qw(:all);
FUNCTIONS
1. IsBadPassword(password)
Returns undef if the password is ok, or a textual description of
the fault if any.
2. IsBadPasswordForUNIX(user, password)
Performs two additional checks: compares the password against the
login name and the "comment" (ie, real name) found on the user
file.
VARIABLES
1. $DICTIONARY
Minimal length for dictionary words that are not allowed to appear
in the password. Set to false to disable dictionary check.
2. $FOLLOWING
Maximal length of characters in a row to allow if the same or
following. If $FOLLOWING_KEYBOARD is true (default), the module
will also check for alphabetical keys following, according to the
English keyboard layout. Set $FOLLOWING to false to bypass this
check.
3. $GROUPS
Groups of characters are lowercase letters, uppercase letters,
digits and the rest of the allowed characters. Set $GROUPS to the
number of minimal character groups a password is required to have.
Setting to false or to 1 will bypass the check.
4. $MINLEN
$MAXLEN
Minimum and maximum length of a password. Both can be set to false.
5. @DICTIONARIES
Location where we are looking for dictionary files. You may want to
set this variable if you are using not *NIX like operating system.
FILES
· /usr/dict/web2
· /usr/dict/words
· /etc/passwd
SEE ALSO
See Data::Password::BasicCheck if you need only basic password
checking.
AUTHOR
Raz Information Systems, razinf@cpan.org, raz@raz.co.il.
COPYRIGHT
Copyright (c) 2001 - 2006 Raz Information Systems Ltd.
http://www.raz.co.il/
This package is distributed under the same terms as Perl itself, see
the Artistic License on Perl's home page.
perl v5.14.0 2006-08-04 Password(3)
