Add unit tests for NTLMv1 portable implementation

net/ntlm/ntlm_constants.h

Index: net/ntlm/ntlm_constants.h
diff --git a/net/ntlm/ntlm_constants.h b/net/ntlm/ntlm_constants.h
index 086184dc810577b52cf69aefa43bec5a55e91d40..cdfb71a80218690b5c4e3e8503f4d7e8ecb676bf 100644
--- a/net/ntlm/ntlm_constants.h
+++ b/net/ntlm/ntlm_constants.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef NET_BASE_NTLM_H_
-#define NET_BASE_NTLM_H_
+#ifndef NET_BASE_NTLM_CONSTANTS_H_
+#define NET_BASE_NTLM_CONSTANTS_H_
 
 #include <stddef.h>
 #include <stdint.h>
@@ -75,6 +75,7 @@ static constexpr size_t SIGNATURE_LEN = arraysize(SIGNATURE);
 static constexpr size_t SECURITY_BUFFER_LEN =
     (2 * sizeof(uint16_t)) + sizeof(uint32_t);
 static constexpr size_t NEGOTIATE_MESSAGE_LEN = 32;
+static constexpr size_t CHALLENGE_HEADER_LEN = 32;
 static constexpr size_t RESPONSE_V1_LEN = 24;
 static constexpr size_t CHALLENGE_LEN = 8;
 static constexpr size_t NTLM_HASH_LEN = 16;
@@ -87,4 +88,4 @@ static constexpr NegotiateFlags NEGOTIATE_MESSAGE_FLAGS =
 }  // namespace ntlm
 }  // namespace net
 
-#endif  // NET_BASE_NTLM_H_
+#endif  // NET_BASE_NTLM_CONSTANTS_H_