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# Copyright (c) 1998-2002 Graham Barr <gbarr@pobox.com> and 2001 Chris Ridd
# <chris.ridd@isode.com>.  All rights reserved.  This program
# is free software; you can redistribute it and/or modify it under the
# same terms as Perl itself.

package Authen::SASL::Perl::EXTERNAL;

use strict;
use vars qw($VERSION @ISA);

$VERSION = "2.14";
@ISA	 = qw(Authen::SASL::Perl);

my %secflags = (
	noplaintext  => 1,
	nodictionary => 1,
	noanonymous  => 1,
);

sub _order { 2 }
sub _secflags {
  shift;
  grep { $secflags{$_} } @_;
}

sub mechanism { 'EXTERNAL' }

sub client_start {
  my $self = shift;
  my $v = $self->_call('user');
  defined($v) ? $v : ''
}

#sub client_step {
#  shift->_call('user');
#}

__END__

=head1 NAME

Authen::SASL::Perl::EXTERNAL - External Authentication class

=head1 SYNOPSIS

use Authen::SASL qw(Perl);

$sasl = Authen::SASL->new(
    mechanism => 'EXTERNAL',
    callback  => {
      user => $user
    },
  );

=head1 DESCRIPTION

This method implements the client part of the EXTERNAL SASL algorithm,
as described in RFC 2222.

=head2 CALLBACK

The callbacks used are:

=over 4

=item user

The username to be used for authentication

=back

=head1 SEE ALSO

L<Authen::SASL>,
L<Authen::SASL::Perl>

=head1 AUTHORS

Software written by Graham Barr <gbarr@pobox.com>,
documentation written by Peter Marschall <peter@adpm.de>.

Please report any bugs, or post any suggestions, to the perl-ldap mailing list
<perl-ldap@perl.org>

=head1 COPYRIGHT

=cut