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 package org.apache.directory.server.kerberos.changepwd.messages;
21
22
23 import java.nio.ByteBuffer;
24
25 import org.apache.directory.api.asn1.EncoderException;
26
27
28 /**
29 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
30 */
31 public abstract class AbstractPasswordMessage
32 {
33 /**
34 * ChangePassword protocol version number.
35 */
36 public static final short PVNO = ( short ) 0xFF80;
37
38 public static final short OLD_PVNO = 1;
39
40 static final int HEADER_LENGTH = 6;
41
42 private short versionNumber;
43
44
45 protected AbstractPasswordMessage( short versionNumber )
46 {
47 this.versionNumber = versionNumber;
48 }
49
50
51 /**
52 * Returns the version number.
53 *
54 * @return The version number.
55 */
56 public short getVersionNumber()
57 {
58 return versionNumber;
59 }
60
61
62 public abstract short computeLength();
63
64
65 public abstract ByteBuffer encode( ByteBuffer buf ) throws EncoderException;
66 }