phpman > perldoc > Authen::SASL::Perl(3pm)

NAME
    Authen::SASL::Perl -- Perl implementation of the SASL Authentication framework

SYNOPSIS
     use Authen::SASL qw(Perl);

     $sasl = Authen::SASL->new(
       mechanism => 'CRAM-MD5 PLAIN ANONYMOUS',
       callback => {
         user => $user,
         pass => \&fetch_password
       }
     );

DESCRIPTION
    Authen::SASL::Perl is the pure Perl implementation of SASL mechanisms in the Authen::SASL
    framework.

    At the time of this writing it provides the client part implementation for the following SASL
    mechanisms:

    ANONYMOUS
        The Anonymous SASL Mechanism as defined in RFC 2245 resp. in IETF Draft
        draft-ietf-sasl-anon-03.txt from February 2004 provides a method to anonymously access
        internet services.

        Since it does no authentication it does not need to send any confidential information such
        as passwords in plain text over the network.

    CRAM-MD5
        The CRAM-MD5 SASL Mechanism as defined in RFC2195 resp. in IETF Draft
        draft-ietf-sasl-crammd5-XX.txt offers a simple challenge-response authentication mechanism.

        Since it is a challenge-response authentication mechanism no passwords are transferred in
        clear-text over the wire.

        Due to the simplicity of the protocol CRAM-MD5 is susceptible to replay and dictionary
        attacks, so DIGEST-MD5 should be used in preferrence.

    DIGEST-MD5
        The DIGEST-MD5 SASL Mechanism as defined in RFC 2831 resp. in IETF Draft
        draft-ietf-sasl-rfc2831bis-XX.txt offers the HTTP Digest Access Authentication as SASL
        mechanism.

        Like CRAM-MD5 it is a challenge-response authentication method that does not send plain text
        passwords over the network.

        Compared to CRAM-MD5, DIGEST-MD5 prevents chosen plaintext attacks, and permits the use of
        third party authentication servers, so that it is recommended to use DIGEST-MD5 instead of
        CRAM-MD5 when possible.

    EXTERNAL
        The EXTERNAL SASL mechanism as defined in RFC 2222 allows the use of external authentication
        systems as SASL mechanisms.

    GSSAPI
        The GSSAPI SASL mechanism as defined in RFC 2222 resp. IETF Draft
        draft-ietf-sasl-gssapi-XX.txt allows using the Generic Security Service Application Program
        Interface [GSSAPI] KERBEROS V5 as as SASL mechanism.

        Although GSSAPI is a general mechanism for authentication it is almost exlusively used for
        Kerberos 5.

    LOGIN
        The LOGIN SASL Mechanism as defined in IETF Draft draft-murchison-sasl-login-XX.txt allows
        the combination of username and clear-text password to be used in a SASL mechanism.

        It does does not provide a security layer and sends the credentials in clear over the wire.
        Thus this mechanism should not be used without adequate security protection.

    PLAIN
        The Plain SASL Mechanism as defined in RFC 2595 resp. IETF Draft
        draft-ietf-sasl-plain-XX.txt is another SASL mechanism that allows username and clear-text
        password combinations in SASL environments.

        Like LOGIN it sends the credentials in clear over the network and should not be used without
        sufficient security protection.

    As for server support, only *PLAIN*, *LOGIN* and *DIGEST-MD5* are supported at the time of this
    writing.

    "server_new" OPTIONS is a hashref that is only relevant for *DIGEST-MD5* for now and it supports
    the following options:

    - no_integrity
    - no_confidentiality

    which configures how the security layers are negotiated with the client (or rather imposed to
    the client).

SEE ALSO
    Authen::SASL, Authen::SASL::Perl::ANONYMOUS, Authen::SASL::Perl::CRAM_MD5,
    Authen::SASL::Perl::DIGEST_MD5, Authen::SASL::Perl::EXTERNAL, Authen::SASL::Perl::GSSAPI,
    Authen::SASL::Perl::LOGIN, Authen::SASL::Perl::PLAIN

AUTHOR
    Peter Marschall <peter AT adpm.de>

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

COPYRIGHT
    Copyright (c) 2004-2006 Peter Marschall. All rights reserved. This document is distributed, and
    may be redistributed, under the same terms as Perl itself.