# ODP::Passport::Key - Key handling part of ODP::Password (Version 0.01)
# Copyright (C)2002 Richard P. Fuller <rpfuller@rpfuller.org>

# This 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

package ODP::Passport::Key;

use strict;
use Digest::MD5 qw (md5_hex);

# new - Initialises a new ODP::Passport::Key object
# Parameters: user, passphrase, issuetime, privs
# Returns: ODP::Passport::Key object
sub new ()
{
   my $object = {};

   $object->{'user'} = $_[1];
   $object->{'secret'} = $_[2];
   $object->{'issued'} = $_[3];
   $object->{'privs'} = $_[4];
   
   if ($object->{'privs'})
   {
      $object->{'privs'} =~ s/  +/ /;
      $object->{'privs'} =~ s/^ //;
      $object->{'privs'} =~ s/ $//;
      $object->{'privs'} = " $object->{'privs'} ";
   }

   return bless $object;
}



# isvalidkey - Returns true if the supplied key matches the key of the object
# Parameters: key to test
# Validity of key
sub isvalidkey ($)
{
   my $self = shift;

   return ($_[0] eq $self->_key());
}



# _key - Calculates the key of the object
# Parameters: none
# Returns: key
sub _key ()
{
   my $self = shift;

   my $string;
   
   $string = $self->{'user'}.'.'.$self->{'secret'}.'.'.$self->{'issued'}.'.'.$self->{'privs'};
      
   return md5_hex($string);

}

1;