package LWP::Authen::Ntlm; use strict; use vars qw/$VERSION/; $VERSION = '5.827'; use Authen::NTLM "1.02"; use MIME::Base64 "2.12"; sub authenticate { my($class, $ua, $proxy, $auth_param, $response, $request, $arg, $size) = @_; my($user, $pass) = $ua->get_basic_credentials($auth_param->{realm}, $request->uri, $proxy); unless(defined $user and defined $pass) { return $response; } if (!$ua->conn_cache()) { warn "The keep_alive option must be enabled for NTLM authentication to work. NTLM authentication aborted.\n"; return $response; } my($domain, $username) = split(/\\/, $user); ntlm_domain($domain); ntlm_user($username); ntlm_password($pass); my $auth_header = $proxy ? "Proxy-Authorization" : "Authorization"; # my ($challenge) = $response->header('WWW-Authenticate'); my $challenge; foreach ($response->header('WWW-Authenticate')) { last if /^NTLM/ && ($challenge=$_); } if ($challenge eq 'NTLM') { # First phase, send handshake my $auth_value = "NTLM " . ntlm(); ntlm_reset(); # Need to check this isn't a repeated fail! my $r = $response; my $retry_count = 0; while ($r) { my $auth = $r->request->header($auth_header); ++$retry_count if ($auth && $auth eq $auth_value); if ($retry_count > 2) { # here we know this failed before $response->header("Client-Warning" => "Credentials for '$user' failed before"); return $response; } $r = $r->previous; } my $referral = $request->clone; $referral->header($auth_header => $auth_value); return $ua->request($referral, $arg, $size, $response); } else { # Second phase, use the response challenge (unless non-401 code # was returned, in which case, we just send back the response # object, as is my $auth_value; if ($response->code ne '401') { return $response; } else { my $challenge; foreach ($response->header('WWW-Authenticate')) { last if /^NTLM/ && ($challenge=$_); } $challenge =~ s/^NTLM //; ntlm(); $auth_value = "NTLM " . ntlm($challenge); ntlm_reset(); } my $referral = $request->clone; $referral->header($auth_header => $auth_value); my $response2 = $ua->request($referral, $arg, $size, $response); return $response2; } } 1; =head1 NAME LWP::Authen::Ntlm - Library for enabling NTLM authentication (Microsoft) in LWP =head1 SYNOPSIS use LWP::UserAgent; use HTTP::Request::Common; my $url = 'http://www.company.com/protected_page.html'; # 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\\MyUserCode", 'MyPassword'); $request = GET $url; print "--Performing request now...-----------\n"; $response = $ua->request($request); print "--Done with request-------------------\n"; if ($response->is_success) {print "It worked!->" . $response->code . "\n"} else {print "It didn't work!->" . $response->code . "\n"} =head1 DESCRIPTION C allows LWP to authenticate against servers that are using the NTLM authentication scheme popularized by Microsoft. This type of authentication is common on intranets of Microsoft-centric organizations. The module takes advantage of the Authen::NTLM module by Mark Bush. Since there is also another Authen::NTLM module available from CPAN by Yee Man Chan with an entirely different interface, it is necessary to ensure that you have the correct NTLM module. 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. =head1 USAGE The module is used indirectly through LWP, rather than including it directly in your code. The LWP system will invoke the NTLM authentication when it encounters the authentication scheme while attempting to retrieve a URL from a server. In order for the NTLM authentication to work, you must have a few things set up in your code prior to attempting to retrieve the URL: =over 4 =item * Enable persistent HTTP connections To do this, pass the "keep_alive=>1" option to the LWP::UserAgent when creating it, like this: my $ua = new LWP::UserAgent(keep_alive=>1); =item * Set the credentials on the UserAgent object The credentials must be set like this: $ua->credentials('www.company.com:80', '', "MyDomain\\MyUserCode", 'MyPassword'); Note that you cannot use the HTTP::Request object's authorization_basic() method to set the credentials. Note, too, that the 'www.company.com:80' portion only sets credentials on the specified port AND it is case-sensitive (this is due to the way LWP is coded, and has nothing to do with LWP::Authen::Ntlm) =back =head1 AVAILABILITY General queries regarding LWP should be made to the LWP Mailing List. Questions specific to LWP::Authen::Ntlm can be forwarded to jtillman@bigfoot.com =head1 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. =head1 SEE ALSO L, L, L.