1 //
2 // ========================================================================
3 // Copyright (c) 1995-2016 Mort Bay Consulting Pty. Ltd.
4 // ------------------------------------------------------------------------
5 // All rights reserved. This program and the accompanying materials
6 // are made available under the terms of the Eclipse Public License v1.0
7 // and Apache License v2.0 which accompanies this distribution.
8 //
9 // The Eclipse Public License is available at
10 // http://www.eclipse.org/legal/epl-v10.html
11 //
12 // The Apache License v2.0 is available at
13 // http://www.opensource.org/licenses/apache2.0.php
14 //
15 // You may elect to redistribute this code under either of these licenses.
16 // ========================================================================
17 //
18
19 package org.eclipse.jetty.websocket.common;
20
21 import java.nio.charset.StandardCharsets;
22 import java.security.MessageDigest;
23
24 import org.eclipse.jetty.util.B64Code;
25
26 /**
27 * Logic for working with the <code>Sec-WebSocket-Key</code> and <code>Sec-WebSocket-Accept</code> headers.
28 * <p>
29 * This is kept separate from Connection objects to facilitate difference in behavior between client and server, as well as making testing easier.
30 */
31 public class AcceptHash
32 {
33 /**
34 * Globally Unique Identifier for use in WebSocket handshake within <code>Sec-WebSocket-Accept</code> and <code>Sec-WebSocket-Key</code> http headers.
35 * <p>
36 * See <a href="https://tools.ietf.org/html/rfc6455#section-1.3">Opening Handshake (Section 1.3)</a>
37 */
38 private final static byte[] MAGIC = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11".getBytes(StandardCharsets.ISO_8859_1);
39
40 /**
41 * Concatenate the provided key with the Magic GUID and return the Base64 encoded form.
42 *
43 * @param key
44 * the key to hash
45 * @return the <code>Sec-WebSocket-Accept</code> header response (per opening handshake spec)
46 */
47 public static String hashKey(String key)
48 {
49 try
50 {
51 MessageDigest md = MessageDigest.getInstance("SHA1");
52 md.update(key.getBytes(StandardCharsets.UTF_8));
53 md.update(MAGIC);
54 return new String(B64Code.encode(md.digest()));
55 }
56 catch (Exception e)
57 {
58 throw new RuntimeException(e);
59 }
60 }
61 }