NAME

Data::Password::Manager - generate, check, manage crypt - des passwords

SYNOPSIS

  use Data::Password::Manager qw(
        pw_gen
        pw_valid
        pw_obscure
        pw_clean
        pw_get
  );

  $password = pw_gen($cleartext);
  $ok = pw_valid($cleartxt,$password);
  $clean_text = pw_clean($dirty_text);
  ($code,$text) = $pw_obscure($newpass,$oldpass,$min_len);
  $passwd = pw_get($user,$passwd_file,\$error);

DESCRIPTION

$password = pw_gen($cleartext);
Generate a 13 character DES password string from clear text
```
  input:        string <= 128 characters
  output:       password
```

$ok = pw_valid($cleartxt,$password);
Return true if clear text is password match

  input:        string <= 128 characters,
                password
  output:       true on match, else false

$clean_text = pw_clean($dirty_text);

  Clean a text string to only include
  / . 0..9 a..z A..Z

  Useful for restricted password sets 
  i.e. http applications

  Returns a string of 128 characters or less

($code,$text) = $pw_obscure($newpass,$oldpass);
Check for a usable password. Returns ok if there is no old password. i.e. any new password will do.

  input:        string <= 128 characters

  return (0, 'OK') if no old password or new is good
  return ( 1, 'too short' ) if length < $MIN_LEN (default 5)
  return ( 2, 'no change' ) if old eq new
  return ( 3, 'a palindrome' ) if new is a palindrome
  return ( 4, 'case change only' ) if old =~ /$new$/i
  return ( 5, 'to similar' ) see code
  return ( 6, 'to simple' ) if not a good character mix
  return ( 7, 'rotated' ) if new is rotated version of old
  return ( 8, 'flipped' ) if new is old flipped around

$passwd=pw_get($user,$passwd_file,\$error);
Check a password file for the presence of $user:$password.
```
  input:        $user
  return:       $password
```
Returns undef on error and places a descriptive error message in the scalar $error. Since a valid password can be empty, the caller must check that the return value is defined, not just false.

FILE is of the form:
```
        user1:DESpassword1
        user2:DESpassword2
        etc...
        # in-line comments are OK
```

EXPORTS_OK

        pw_gen
        pw_valid
        pw_clean
        pw_obscure
        pw_get

ACKNOWLEDGEMENTS

Code for the subroutine to check for obscure passwords is based on and taken in part from a port to perl of the functions found in the shadow suite by Julianne Frances Haugh. Thank you for your contribution to public domain software Julianne.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

1
Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
2.
Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
3.
Neither the name of Julianne F. Haugh nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY JULIE HAUGH AND CONTRIBUTORS `AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.IN NO EVENT SHALL JULIE HAUGH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

RCSID(``$Id: obscure.c,v 1.7 1998/04/16 19:57:44 marekm Exp $'')

This version of obscure.c contains modifications to support ``cracklib'' by Alec Muffet (alec.muffett@uk.sun.com) must obtain the Cracklib library source code for this function to operate.

COPYRIGHT

The non-(Julianne Haugh) portion of the program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

AUTHOR

Michael Robinton, BizSystems <michael@bizsystems.com>