001 /*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements. See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership. The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License. You may obtain a copy of the License at
009 *
010 * http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied. See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 *
019 */
020
021 package org.apache.directory.server.dns.io.encoder;
022
023
024 /**
025 * 2. The CERT Resource Record
026 *
027 * The CERT resource record (RR) has the structure given below. Its RR
028 * type code is 37.
029 *
030 * 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3
031 * 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
032 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
033 * | type | key tag |
034 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
035 * | algorithm | /
036 * +---------------+ certificate or CRL /
037 * / /
038 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-|
039 *
040 * The type field is the certificate type as define in section 2.1
041 * below.
042 *
043 * The algorithm field has the same meaning as the algorithm field in
044 * KEY and SIG RRs [RFC 2535] except that a zero algorithm field
045 * indicates the algorithm is unknown to a secure DNS, which may simply
046 * be the result of the algorithm not having been standardized for
047 * secure DNS.
048 *
049 * The key tag field is the 16 bit value computed for the key embedded
050 * in the certificate as specified in the DNSSEC Standard [RFC 2535].
051 * This field is used as an efficiency measure to pick which CERT RRs
052 * may be applicable to a particular key. The key tag can be calculated
053 * for the key in question and then only CERT RRs with the same key tag
054 * need be examined. However, the key must always be transformed to the
055 * format it would have as the public key portion of a KEY RR before the
056 * key tag is computed. This is only possible if the key is applicable
057 * to an algorithm (and limits such as key size limits) defined for DNS
058 * security. If it is not, the algorithm field MUST BE zero and the tag
059 * field is meaningless and SHOULD BE zero.
060 *
061 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
062 * @version $Rev: 501160 $, $Date: 2007-01-29 21:41:33 +0200 (Mon, 29 Jan 2007) $
063 */
064 public class CertificateRecordEncoder
065 {
066 }