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.\" ========================================================================
.\"
.IX Title "LWP::Authen::Ntlm 3"
.TH LWP::Authen::Ntlm 3 "2004-04-06" "perl v5.8.4" "User Contributed Perl Documentation"
.SH "NAME"
LWP::Authen::Ntlm \- Library for enabling NTLM authentication (Microsoft) in LWP
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 3
\& use LWP::UserAgent;
\& use HTTP::Request::Common;
\& my $url = 'http://www.company.com/protected_page.html';
.Ve
.PP
.Vb 3
\& # Set up the ntlm client and then the base64 encoded ntlm handshake message
\& my $ua = new LWP::UserAgent(keep_alive=>1);
\& $ua->credentials('www.company.com:80', '', "MyDomain\e\eMyUserCode", 'MyPassword');
.Ve
.PP
.Vb 4
\& $request = GET $url;
\& print "--Performing request now...-----------\en";
\& $response = $ua->request($request);
\& print "--Done with request-------------------\en";
.Ve
.PP
.Vb 2
\& if ($response->is_success) {print "It worked!->" . $response->code . "\en"}
\& else {print "It didn't work!->" . $response->code . "\en"}
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\f(CW\*(C`LWP::Authen::Ntlm\*(C'\fR allows \s-1LWP\s0 to authenticate against servers that are using the 
\&\s-1NTLM\s0 authentication scheme popularized by Microsoft.  This type of authentication is 
common on intranets of Microsoft-centric organizations.
.PP
The module takes advantage of the Authen::NTLM module by Mark Bush.  Since there 
is also another Authen::NTLM module available from \s-1CPAN\s0 by Yee Man Chan with an 
entirely different interface, it is necessary to ensure that you have the correct 
\&\s-1NTLM\s0 module.
.PP
In addition, there have been problems with incompatibilities between different 
versions of Mime::Base64, which Bush's Authen::NTLM makes use of.  Therefore, it is 
necessary to ensure that your Mime::Base64 module supports exporting of the 
encode_base64 and decode_base64 functions.
.SH "USAGE"
.IX Header "USAGE"
The module is used indirectly through \s-1LWP\s0, rather than including it directly in your 
code.  The \s-1LWP\s0 system will invoke the \s-1NTLM\s0 authentication when it encounters the 
authentication scheme while attempting to retrieve a \s-1URL\s0 from a server.  In order 
for the \s-1NTLM\s0 authentication to work, you must have a few things set up in your 
code prior to attempting to retrieve the \s-1URL:\s0
.IP "\(bu" 4
Enable persistent \s-1HTTP\s0 connections
.Sp
To do this, pass the \*(L"keep_alive=>1\*(R" option to the LWP::UserAgent when creating it, like this:
.Sp
.Vb 1
\&    my $ua = new LWP::UserAgent(keep_alive=>1);
.Ve
.IP "\(bu" 4
Set the credentials on the UserAgent object
.Sp
The credentials must be set like this:
.Sp
.Vb 1
\&   $ua->credentials('www.company.com:80', '', "MyDomain\e\eMyUserCode", 'MyPassword');
.Ve
.Sp
Note that you cannot use the HTTP::Request object's \fIauthorization_basic()\fR method to set 
the credentials.  Note, too, that the 'www.company.com:80' portion only sets credentials 
on the specified port \s-1AND\s0 it is case-sensitive (this is due to the way \s-1LWP\s0 is coded, and 
has nothing to do with LWP::Authen::Ntlm)
.PP
If you run into trouble and need help troubleshooting your problems, try enabling \s-1LWP\s0 
debugging by putting this line at the top of your code:
.PP
.Vb 1
\&    use LWP::Debug qw(+);
.Ve
.PP
You should get copious debugging output, including messages from LWP::Authen::Ntlm itself.
.SH "AVAILABILITY"
.IX Header "AVAILABILITY"
General queries regarding \s-1LWP\s0 should be made to the \s-1LWP\s0 Mailing List.
.PP
Questions specific to LWP::Authen::Ntlm can be forwarded to jtillman@bigfoot.com
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright (c) 2002 James Tillman. All rights reserved. This
program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\s-1LWP\s0, LWP::UserAgent, lwpcook.