Data-Password-Check version 0.04 =========================== NAME Data::Password::Check - sanity check passwords DESCRIPTION Users can be lazy. If you're a perl programmer this is a good thing. If you're choosing a password this is a bad thing. This module performs some sanity checks on passwords. Details on checks than can be performed are described below. SYNOPSIS Basic use of the module is as follows: use Data::Password::Check; # check a password my $pwcheck = Data::Password::Check->check({ 'password' => $some_password }); # did we have any errors? if ($pwcheck->has_errors) { # print the errors print( join("\n", @{ $pwcheck->error_list }), "\n" ); } PUBLIC METHODS These methods are publically available. Use them to your heart's content. check($proto,$options) This is the main function for this module. You must pass one mandatory value in the $options hash-reference - a password: # check a password $result = Data::Password::Check->check({'password' => $pwd_to_check}); There are other options that may be passed to invoke further password tests if required: * tests set this to a list of test names to replace the list of tests performed by the module e.g. tests => [ 'length' ] will make the module perfoem the length check only * tests_append set this to a list of additional tests to perform. This is useful if you want to call more tests than are in the default list, or to include your own tests when inheriting from this module. e.g. test => [ 'mytest1', 'mytest2' ] will make the module perform two extra tests (assuming they exist) mytest1 and mytest2. has_errors($class) This function is used to determine if there were any errors found while sanity checking the supplied password. It does not return the errors themselves. Returns 1 if there were errors, 0 otherwise error_list($class) This function returns an array-reference to a list of the error messages. If there are no errors undef is returned. AVAILABLE CHECKS By default the module will perform all checks listed below. You can limit the number of checks by passing a list of desired tests via the tests option when calling check(). e.g. Data::Password::Check->check({ ... 'tests' => [ 'length' ], # check only that the password meets a minimum-length requirement ... }); alphanumeric_only Make sure the password only contains a-z, A-Z and 0-9 characters. alphanumeric Make sure the password contains one of each from the following sets: a-z, A-Z and 0-9 length Make sure the password it at least 6 characters long. If min_length was passed as an option to check(), this value will be used instead, assuming it's a positive integer. mixed_case Make sure the password is mixes case, i.e. not all lower case, nor all upper case silly Make sure the password isn't a known silly word (e.g 'password' is a bad choice for a password). The default list contains *qwerty*, and *password* only. You may choose to replace this list of words or to add your own to the end of the list. If you wish to replace the list of silly-words, you should pass them in via the options when calling check(), as 'silly_words'. e.g. Data::Password::Check->check({ ... 'silly_words' => [ 'my', 'silly', 'words' ], ... }); If you would like to add words to the existing list, you should pass them in via the 'silly_words_append' option when calling check(). e.g. Data::Password::Check->check({ ... 'silly_words_append' => [ 'more', 'silly', 'words' ], ... }); All matching is case-insensitive, and if you choose to append words, duplicates will be omitted. repeated Make sure the password isn't a single character repeated, e.g. 'aaaaaaaaaa'. PRIVATE METHODS These methods are private to this module. If you choose to use them outside the module, all bets are off. _do_checks($self) This function calls each required test in turn. It's an internal function called within check(). _add_error($class,$message) This function is used to add an error message to the internal store. The errors can later be retrieved using the error_list() method. _skipped_test($class,$testname) This function exists so that it's possible to work out if a test was skipped because "something went wrong" - usually because of an invalid option passed in via the check() options. This function was written to enable some tests in the "make test" phase of installing the module. INSTALLATION To install this module type the following: perl Makefile.PL make make test make install DEPENDENCIES This module requires these other modules and libraries: Test::More COPYRIGHT AND LICENCE Copyright (C) 2004 by Chisel Wright This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.8.2 or, at your option, any later version of Perl 5 you may have available.