Authen...::Perl(3pm) User Contributed Perl Documentation Authen...::Perl(3pm)
NAME
Authen::SASL::Perl -- Perl implementation of the SASL Authentication
framework
VERSION
version 2.1700
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
preference.
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 a SASL
mechanism.
Although GSSAPI is a general mechanism for authentication it is
almost exclusively 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 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@adpm.de>
Please report any bugs, or post any suggestions, to the perl-ldap
mailing list <perl-ldap@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.
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