1 /*
2 * Copyright (c) 2006, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package sun.security.ssl;
27
28 import java.util.ArrayList;
29 import java.util.List;
30
31 final class ExtensionType {
32
33 final int id;
34 final String name;
35
36 private ExtensionType(int id, String name) {
37 this.id = id;
38 this.name = name;
39 }
40
41 @Override
42 public String toString() {
43 return name;
44 }
45
46 static List<ExtensionType> knownExtensions = new ArrayList<>(15);
47
48 static ExtensionType get(int id) {
49 for (ExtensionType ext : knownExtensions) {
50 if (ext.id == id) {
51 return ext;
52 }
53 }
54 return new ExtensionType(id, "type_" + id);
55 }
56
57 private static ExtensionType e(int id, String name) {
58 ExtensionType ext = new ExtensionType(id, name);
59 knownExtensions.add(ext);
60 return ext;
61 }
62
63 // extensions defined in RFC 3546
64 static final ExtensionType EXT_SERVER_NAME =
65 e(0x0000, "server_name"); // IANA registry value: 0
66 static final ExtensionType EXT_MAX_FRAGMENT_LENGTH =
67 e(0x0001, "max_fragment_length"); // IANA registry value: 1
68 static final ExtensionType EXT_CLIENT_CERTIFICATE_URL =
69 e(0x0002, "client_certificate_url"); // IANA registry value: 2
70 static final ExtensionType EXT_TRUSTED_CA_KEYS =
71 e(0x0003, "trusted_ca_keys"); // IANA registry value: 3
72 static final ExtensionType EXT_TRUNCATED_HMAC =
73 e(0x0004, "truncated_hmac"); // IANA registry value: 4
74 static final ExtensionType EXT_STATUS_REQUEST =
75 e(0x0005, "status_request"); // IANA registry value: 5
76
77 // extensions defined in RFC 4681
78 static final ExtensionType EXT_USER_MAPPING =
79 e(0x0006, "user_mapping"); // IANA registry value: 6
80
81 // extensions defined in RFC 5081
82 static final ExtensionType EXT_CERT_TYPE =
83 e(0x0009, "cert_type"); // IANA registry value: 9
84
85 // extensions defined in RFC 4492 (ECC) and RFC 7919 (FFDHE)
86 static final ExtensionType EXT_SUPPORTED_GROUPS =
87 e(0x000A, "supported_groups"); // IANA registry value: 10
88 static final ExtensionType EXT_EC_POINT_FORMATS =
89 e(0x000B, "ec_point_formats"); // IANA registry value: 11
90
91 // extensions defined in RFC 5054
92 static final ExtensionType EXT_SRP =
93 e(0x000C, "srp"); // IANA registry value: 12
94
95 // extensions defined in RFC 5246
96 static final ExtensionType EXT_SIGNATURE_ALGORITHMS =
97 e(0x000D, "signature_algorithms"); // IANA registry value: 13
98
99 // extension defined in RFC 7301 (ALPN)
100 static final ExtensionType EXT_ALPN =
101 e(0x0010, "application_layer_protocol_negotiation");
102 // IANA registry value: 16
103
104 // extensions defined in RFC 6961
105 static final ExtensionType EXT_STATUS_REQUEST_V2 =
106 e(0x0011, "status_request_v2"); // IANA registry value: 17
107
108 // extensions defined in RFC 5746
109 static final ExtensionType EXT_RENEGOTIATION_INFO =
110 e(0xff01, "renegotiation_info"); // IANA registry value: 65281
111 }