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 */ 020package org.apache.directory.server.kerberos.changepwd.messages; 021 022 023import java.nio.ByteBuffer; 024 025import org.apache.directory.api.asn1.EncoderException; 026 027 028/** 029 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 030 */ 031public abstract class AbstractPasswordMessage 032{ 033 /** 034 * ChangePassword protocol version number. 035 */ 036 public static final short PVNO = ( short ) 0xFF80; 037 038 public static final short OLD_PVNO = 1; 039 040 static final int HEADER_LENGTH = 6; 041 042 private short versionNumber; 043 044 045 protected AbstractPasswordMessage( short versionNumber ) 046 { 047 this.versionNumber = versionNumber; 048 } 049 050 051 /** 052 * Returns the version number. 053 * 054 * @return The version number. 055 */ 056 public short getVersionNumber() 057 { 058 return versionNumber; 059 } 060 061 062 public abstract short computeLength(); 063 064 065 public abstract ByteBuffer encode( ByteBuffer buf ) throws EncoderException; 066}