From dffce9cd838d728f5fa5d6c2564fefb807486f44 Mon Sep 17 00:00:00 2001
From: Matt Wrock <matt@mattwrock.com>
Date: Thu, 7 Jul 2016 00:18:08 -0700
Subject: [PATCH] raise a better error if the auth headers cant be parsed as
 reported in #208

---
 lib/winrm/http/transport.rb | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/lib/winrm/http/transport.rb b/lib/winrm/http/transport.rb
index 63b0c917..0a4397e1 100644
--- a/lib/winrm/http/transport.rb
+++ b/lib/winrm/http/transport.rb
@@ -219,7 +219,12 @@ def init_auth
         @logger.debug 'Sending HTTP POST for Negotiate Authentication'
         r = @httpcli.post(@endpoint, '', hdr)
         verify_ssl_fingerprint(r.peer_cert)
-        itok = r.header['WWW-Authenticate'].pop.split.last
+        auth_header = r.header['WWW-Authenticate'].pop
+        unless auth_header
+          msg = "Unable to parse authorization header. Headers: #{r.headers}\r\nBody: #{r.body}"
+          raise WinRMHTTPTransportError.new(msg, r.status_code)
+        end
+        itok = auth_header.split.last
         binding = r.peer_cert.nil? ? nil : Net::NTLM::ChannelBinding.create(r.peer_cert)
         auth3 = @ntlmcli.init_context(itok, binding)
         { 'Authorization' => "Negotiate #{auth3.encode64}" }