Hi, I have web service that is posting xml data to Windows server using NTLM2 authentication. Works fine but if payload is large (>1.4MB) authorization fails with message 'Credentials for 'login' failed before' and I get 'Client-Response-Num: 1' in every step of authentication - should be 1->2->3

I use Authen::NTLM version 1.09

I was able to submit same large payload using windows *.exe test client and using python client so issue is not network or server size limit.

Here is client code:

#!/usr/bin/perl -w
$| = 1;
use Authen::NTLM 1.09;
use LWP::UserAgent;
use HTTP::Request::Common;
use Data::Dumper;

my $url = 'http://ip:port/xyz';

ntlmv2(1);

my $ua = LWP::UserAgent->new(keep_alive=>1);
$ua->credentials('ip:port', '', "\\login", 'password');

$ua->add_handler("request_send",  sub { print "\n[START request_send h
+andler]\n"; shift->dump; print "[END request_send handler]\n\n"; retu
+rn });
$ua->add_handler("response_data",  sub { print "\n[START response_data
+ handler]\n"; shift->dump; print "[END response_data handler]\n\n"; r
+eturn ; });

my $response=$ua->request(
                        POST $url,                        
                        Content_Type => 'text/plain',
                        Content      => $xmlContent,
                    );
                                            
if ($response->is_success) 
    {print "It worked!->" . $response->code . "\ncontent:".$response->
+content.'\n'.$response->status_line."\n".$response->headers()->as_str
+ing()."\n";}
else 
    {print "It didn't work!->" . $response->code ." ".$response->statu
+s_line. "\n".$response->headers()->as_string(). "\n";}

[download]

Debug Output for large payload:

[START request_send handler]
POST http://url
User-Agent: libwww-perl/5.834
Content-Length: 15230551
Content-Type: text/plain

<?xml version="1.0" encoding="utf-8" ?>
<Contact...
(+ 15230039 more bytes not shown)
[END request_send handler]


[START response_data handler]
HTTP/1.1 401 Unauthorized
Date: Wed, 21 Aug 2013 23:57:52 GMT
Server: Microsoft-IIS/7.5
WWW-Authenticate: NTLM
WWW-Authenticate: Negotiate
Content-Length: 1293
Content-Type: text/html
Client-Peer: IPport
Client-Response-Num: 1
X-Powered-By: ASP.NET
[END response_data handler]


[START request_send handler]
POST http://url
Authorization: NTLM Txxx=
User-Agent: libwww-perl/5.834
Content-Length: 15230551
Content-Type: text/plain

<?xml version="1.0" encoding="utf-8" ?>
<Contact...
(+ 15230039 more bytes not shown)
[END request_send handler]


[START response_data handler]
HTTP/1.1 401 Unauthorized
Date: Wed, 21 Aug 2013 23:57:52 GMT
Server: Microsoft-HTTPAPI/2.0
WWW-Authenticate: NTLM Tlxxx==
Content-Length: 341
Content-Type: text/html; charset=us-ascii
Client-Peer: IPport
Client-Response-Num: 1
Title: Not Authorized
[END response_data handler]



[START request_send handler]
POST http://url
Authorization: NTLM Tlxxx
User-Agent: libwww-perl/5.834
Content-Length: 15230551
Content-Type: text/plain

<?xml version="1.0" encoding="utf-8" ?>
<Contact...
(+ 15230039 more bytes not shown)
[END request_send handler]


[START response_data handler]
HTTP/1.1 401 Unauthorized
Date: Wed, 21 Aug 2013 23:57:52 GMT
Server: Microsoft-IIS/7.5
WWW-Authenticate: NTLM
WWW-Authenticate: Negotiate
Content-Length: 1293
Content-Type: text/html
Client-Peer: IPport
Client-Response-Num: 1
X-Powered-By: ASP.NET
[END response_data handler]


[START request_send handler]
POST http://url
Authorization: NTLM Txxx=
User-Agent: libwww-perl/5.834
Content-Length: 15230551
Content-Type: text/plain

<?xml version="1.0" encoding="utf-8" ?>
<Contact...
(+ 15230039 more bytes not shown)
[END request_send handler]


[START response_data handler]
HTTP/1.1 401 Unauthorized
Date: Wed, 21 Aug 2013 23:57:52 GMT
Server: Microsoft-HTTPAPI/2.0
WWW-Authenticate: NTLM Tlxxx==
Content-Length: 341
Content-Type: text/html; charset=us-ascii
Client-Peer: IPport
Client-Response-Num: 1
Title: Not Authorized
[END response_data handler]

----------------------------------
....Removed one step
----------------------------------

[START request_send handler]
POST http://url
Authorization: NTLM Tlxxx
User-Agent: libwww-perl/5.834
Content-Length: 15230551
Content-Type: text/plain

<?xml version="1.0" encoding="utf-8" ?>
<Contact...
(+ 15230039 more bytes not shown)
[END request_send handler]


[START response_data handler]
HTTP/1.1 401 Unauthorized
Date: Wed, 21 Aug 2013 23:57:52 GMT
Server: Microsoft-IIS/7.5
WWW-Authenticate: NTLM
WWW-Authenticate: Negotiate
Content-Length: 1293
Content-Type: text/html
Client-Peer: IPport
Client-Response-Num: 1
X-Powered-By: ASP.NET
[END response_data handler]


It didn't work!->401 401 Unauthorized
Date: Wed, 21 Aug 2013 23:57:52 GMT
Server: Microsoft-IIS/7.5
WWW-Authenticate: NTLM
WWW-Authenticate: Negotiate
Content-Length: 1293
Content-Type: text/html
Client-Date: Tue, 20 Aug 2013 11:58:25 GMT
Client-Peer: IPport
Client-Response-Num: 1
Client-Warning: Credentials for 'login' failed before
Title: 401 - Unauthorized: Access is denied due to invalid credentials
+.
X-Powered-By: ASP.NET

[download]
Thanks!

In reply to NTLM2 authentication fails for large payload by Anonymous Monk

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