1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 *
19 */
20
21 package org.apache.directory.server.dns.io.encoder;
22
23
24 /**
25 * 2. The CERT Resource Record
26 *
27 * The CERT resource record (RR) has the structure given below. Its RR
28 * type code is 37.
29 *
30 * 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
31 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
32 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
33 * | type | key tag |
34 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
35 * | algorithm | /
36 * +---------------+ certificate or CRL /
37 * / /
38 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-|
39 *
40 * The type field is the certificate type as define in section 2.1
41 * below.
42 *
43 * The algorithm field has the same meaning as the algorithm field in
44 * KEY and SIG RRs [RFC 2535] except that a zero algorithm field
45 * indicates the algorithm is unknown to a secure DNS, which may simply
46 * be the result of the algorithm not having been standardized for
47 * secure DNS.
48 *
49 * The key tag field is the 16 bit value computed for the key embedded
50 * in the certificate as specified in the DNSSEC Standard [RFC 2535].
51 * This field is used as an efficiency measure to pick which CERT RRs
52 * may be applicable to a particular key. The key tag can be calculated
53 * for the key in question and then only CERT RRs with the same key tag
54 * need be examined. However, the key must always be transformed to the
55 * format it would have as the public key portion of a KEY RR before the
56 * key tag is computed. This is only possible if the key is applicable
57 * to an algorithm (and limits such as key size limits) defined for DNS
58 * security. If it is not, the algorithm field MUST BE zero and the tag
59 * field is meaningless and SHOULD BE zero.
60 *
61 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
62 */
63 public class CertificateRecordEncoder
64 {
65 }