ntlm_wb: Fixed buffer size not being large enough for NTLMv2 sessions

Bug: http://curl.haxx.se/mail/lib-2014-07/0103.html
Reported-by: David Woodhouse

lib/curl_ntlm_wb.c

@@ -5,7 +5,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2012, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -43,6 +43,7 @@
 #include "urldata.h"
 #include "sendf.h"
 #include "select.h"
+#include "curl_ntlm_msgs.h"
 #include "curl_ntlm_wb.h"
 #include "url.h"
 #include "strerror.h"
@@ -227,9 +228,10 @@ static CURLcode ntlm_wb_response(struct connectdata *conn,
                                  const char *input, curlntlm state)
 {
   ssize_t size;
-  char buf[200]; /* enough, type 1, 3 message length is less then 200 */
+  char buf[NTLM_BUFSIZE];
   char *tmpbuf = buf;
-  size_t len_in = strlen(input), len_out = sizeof(buf);
+  size_t len_in = strlen(input);
+  size_t len_out = sizeof(buf);
 
   while(len_in > 0) {
     ssize_t written = swrite(conn->ntlm_auth_hlpr_socket, input, len_in);