NAME¶
Data::Password - Perl extension for assessing password quality.
SYNOPSIS¶
use Data::Password qw(IsBadPassword);
print IsBadPassword("clearant");
# Bad password - contains the word 'clear', only lowercase
use Data::Password qw(:all);
$DICTIONARY = 0;
$GROUPS = 0;
$SKIPCHAR = 0;
print IsBadPassword("clearant");
DESCRIPTION¶
This module 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 characters 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.
- 6.
- $SKIPCHAR
Set $SKIPCHAR to 1 to skip checking for bad characters.
FILES¶
- •
- /usr/share/dict/web2
- •
- /usr/share/dict/words
- •
- /etc/passwd
SEE ALSO¶
See Data::Password::BasicCheck if you need only basic password checking. Other
modules Data::Password::Common, Data::Password::Check, Data::Password::Meter,
Data::Password::Entropy and String::Validator::Password
AUTHOR¶
Ariel Brosh (RIP), January 2002.
Oded S. Resnik, from April 2004.
COPYRIGHT¶
Copyright (c) 2001 - 2014 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.