1 /**
2 * Waffle (https://github.com/dblock/waffle)
3 *
4 * Copyright (c) 2010 - 2015 Application Security, Inc.
5 *
6 * All rights reserved. This program and the accompanying materials
7 * are made available under the terms of the Eclipse Public License v1.0
8 * which accompanies this distribution, and is available at
9 * http://www.eclipse.org/legal/epl-v10.html
10 *
11 * Contributors:
12 * Application Security, Inc.
13 */
14 package waffle.util;
15
16 /**
17 * Rudimentary NTLM message utility.
18 *
19 * @author dblock[at]dblock[dot]org
20 */
21 public final class NtlmMessage {
22
23 // NTLM messages start with 0x4e544c4d53535000, NTLMSSP signature
24 /** The Constant NTLM_SSP_SIGNATURE. */
25 private static final byte[] NTLM_SSP_SIGNATURE = { 0x4e, 0x54, 0x4c, 0x4d, 0x53, 0x53, 0x50, 0x00 };
26
27 /**
28 * Checks if is ntlm message.
29 *
30 * @param message
31 * the message
32 * @return true, if is ntlm message
33 */
34 public static boolean isNtlmMessage(final byte[] message) {
35 if (message == null || message.length < NtlmMessage.NTLM_SSP_SIGNATURE.length) {
36 return false;
37 }
38
39 for (int i = 0; i < NtlmMessage.NTLM_SSP_SIGNATURE.length; i++) {
40 if (NtlmMessage.NTLM_SSP_SIGNATURE[i] != message[i]) {
41 return false;
42 }
43 }
44
45 return true;
46 }
47
48 /**
49 * Get NTLM message type.
50 *
51 * @param message
52 * Assuming a valid NTLM message.
53 * @return Message type.
54 */
55 public static int getMessageType(final byte[] message) {
56 return message[NtlmMessage.NTLM_SSP_SIGNATURE.length];
57 }
58
59 /**
60 * Instantiates a new ntlm message.
61 */
62 private NtlmMessage() {
63 // Prevent Instantiation of object
64 }
65 }