LWP::Authen::Negotiate - GSSAPI based Authentication Plugin for LWP

       Achim Grolms, <achim@grolmsnet.de>

       http://perlgssapi.sourceforge.net/

       Thanks to

       Leif Johansson
           who has conributed a lot of code from his implementation of the module and send a lot of input, ideas
           and feedback

       Harald Joerg
           helped with Kerberos knowledge and does testing on cygwin against IIS and mod_auth_kerb

       Christopher Odenbach
           does a lot of testing on Linux and Solaris

       Dax Kelson
           does a lot of testing on Linux

       Karsten Kuenne
           helped with advice

       As default Kerberos 5 is selected as GSSAPI mechanism.  a later veriosn will make that configureable.

       Copyright (C) 2006 by Achim Grolms <perl@grolmsnet.de>

       This  library  is  free  software;  you can redistribute it and/or modify it under the same terms as Perl
       itself, either Perl version 5.8.4 or, at your option, any later version of Perl 5 you may have available.

perl v5.32.0                                       2020-12-22                        LWP::Authen::Negotiate(3pm)

       To see what ist going on (and going wrong) add

          use LWP::Debug qw(+);

       to yor LWP using Scripts.

       (e.g. too see what is going wrong with GSSAPI...)

       the output will look like this:

          LWP::UserAgent::new: ()
          LWP::UserAgent::request: ()
          LWP::UserAgent::send_request: GET http://testwurst.grolmsnet.lan:8090/geheim/
          LWP::UserAgent::_need_proxy: Not proxied
          LWP::Protocol::http::request: ()
          LWP::Protocol::collect: read 478 bytes
          LWP::UserAgent::request: Simple response: Unauthorized
          LWP::Authen::Negotiate::authenticate: authenticate() called
          LWP::Authen::Negotiate::authenticate: target hostname testwurst.grolmsnet.lan
          LWP::Authen::Negotiate::authenticate: GSSAPI servicename     HTTP/moerbsen.grolmsnet.lan@GROLMSNET.LAN
          LWP::Authen::Negotiate::authenticate:  Miscellaneous failure (see text)
          LWP::Authen::Negotiate::authenticate: open(/tmp/krb5cc_1000): file not found

       In this case the credentials cache was empty.  Run kinit first ;-)

       To see what ist going on add

          use LWP::Debug qw(+);

       to yor LWP using Scripts.

       (e.g. too see what is going wrong with GSSAPI...)

       LWP_AUTHEN_NEGOTIATE_DELEGATE
           Define to enable ticket forwarding to webserver.

       LWP::Authen::Negotiate - GSSAPI based Authentication Plugin for LWP

http://www.kerberosprotocols.org/index.php/Draft-brezak-spnego-http-03.txt
           Description of WWW-Negotiate protol

       http://modauthkerb.sourceforge.net/
           the Kerberos and SPNEGO Authentication module for Apache mod_auth_kerb

       http://perlgssapi.sourceforge.net/
           Module Homepage

       http://www.kerberosprotocols.org/index.php/Web
           Sofware and APIs related to WWW-Negotiate

       http://www.grolmsnet.de/kerbtut/
           describes how to let mod_auth_kerb play together with Internet Explorer and Windows2003 Server

          #! /usr/bin/perl -w

          use strict;
          require LWP::UserAgent;

          # uncomment if you want see what is going wrong messages
          #
          #use LWP::Debug qw(+);

          my $ua = LWP::UserAgent->new;
          my $response = $ua->get('http://testwurst.grolmsnet.lan:8090/geheim/');
          if ($response->is_success) {
             print $response->content;  # or whatever
          }
          else {
              die $response->status_line;
          }

       just install LWP::Authen::Negotiate, LWP uses it as authentication plugin.  Use your LWP::UserAgent
       Scripts as usual.  Authentication is done transparent based on your GSSAPI installation (MIT Kerberos or
       Heimdal)

       WWW-Negotiate Webservers are IIS or Apache with mod_auth_kerb for example.