# phpman > perldoc > Authen::SASL::Perl::PLAIN

## NAME
    [Authen::SASL::Perl::PLAIN](https://www.chedong.com/phpMan.php/perldoc/Authen%3A%3ASASL%3A%3APerl%3A%3APLAIN/markdown) - Plain Login Authentication class

## SYNOPSIS
      use [Authen::SASL](https://www.chedong.com/phpMan.php/perldoc/Authen%3A%3ASASL/markdown) qw(Perl);

      $sasl = [Authen::SASL](https://www.chedong.com/phpMan.php/perldoc/Authen%3A%3ASASL/markdown)->new(
        mechanism => 'PLAIN',
        callback  => {
          user => $user,
          pass => $pass
        },
      );

## DESCRIPTION
    This method implements the client and server part of the PLAIN SASL algorithm, as described in
    RFC 2595 resp. IETF Draft draft-ietf-sasl-plain-XX.txt

  CALLBACK
    The callbacks used are:

   Client
    authname
        The authorization id to use after successful authentication (client)

    user
        The username to be used for authentication (client)

    pass
        The user's password to be used for authentication.

   Server
### checkpass
        returns true and false depending on the validity of the credentials passed in arguments.

## SEE ALSO
    [Authen::SASL](https://www.chedong.com/phpMan.php/perldoc/Authen%3A%3ASASL/markdown), [Authen::SASL::Perl](https://www.chedong.com/phpMan.php/perldoc/Authen%3A%3ASASL%3A%3APerl/markdown)

## 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>>

## COPYRIGHT
    Copyright (c) 2002-2004 Graham Barr. All rights reserved. This program is free software; you can
    redistribute it and/or modify it under the same terms as Perl itself.

    Documentation Copyright (c) 2004 Peter Marschall. All rights reserved. This documentation is
    distributed, and may be redistributed, under the same terms as Perl itself.

    Server support Copyright (c) 2009 Yann Kerherve. All rights reserved. This program is free
    software; you can redistribute it and/or modify it under the same terms as Perl itself.