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 package org.apache.directory.server.kerberos.shared.io.encoder;
021
022
023 import java.io.ByteArrayOutputStream;
024 import java.io.IOException;
025
026 import org.apache.directory.server.kerberos.shared.messages.Encodable;
027 import org.apache.directory.server.kerberos.shared.messages.components.EncApRepPart;
028 import org.apache.directory.shared.asn1.der.ASN1OutputStream;
029 import org.apache.directory.shared.asn1.der.DERApplicationSpecific;
030 import org.apache.directory.shared.asn1.der.DERInteger;
031 import org.apache.directory.shared.asn1.der.DERSequence;
032 import org.apache.directory.shared.asn1.der.DERTaggedObject;
033
034
035 /**
036 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
037 * @version $Rev: 540371 $, $Date: 2007-05-22 03:00:43 +0300 (Tue, 22 May 2007) $
038 */
039 public class EncApRepPartEncoder implements Encoder, EncoderFactory
040 {
041 /**
042 * The application code constant for the {@link EncApRepPart} (27).
043 */
044 public static final int APPLICATION_CODE = 27;
045
046
047 public Encoder getEncoder()
048 {
049 return new EncApRepPartEncoder();
050 }
051
052
053 public byte[] encode( Encodable apRepPart ) throws IOException
054 {
055 ByteArrayOutputStream baos = new ByteArrayOutputStream();
056 ASN1OutputStream aos = new ASN1OutputStream( baos );
057
058 DERSequence privPartSequence = encodeApRepPartSequence( ( EncApRepPart ) apRepPart );
059 aos.writeObject( DERApplicationSpecific.valueOf( APPLICATION_CODE, privPartSequence ) );
060 aos.close();
061
062 return baos.toByteArray();
063 }
064
065
066 private DERSequence encodeApRepPartSequence( EncApRepPart message )
067 {
068 DERSequence sequence = new DERSequence();
069
070 sequence.add( new DERTaggedObject( 0, KerberosTimeEncoder.encode( message.getClientTime() ) ) );
071 sequence.add( new DERTaggedObject( 1, DERInteger.valueOf( message.getClientMicroSecond() ) ) );
072
073 if ( message.getSubSessionKey() != null )
074 {
075 sequence.add( new DERTaggedObject( 2, EncryptionKeyEncoder.encodeSequence( message.getSubSessionKey() ) ) );
076 }
077
078 if ( message.getSequenceNumber() != null )
079 {
080 sequence.add( new DERTaggedObject( 3, DERInteger.valueOf( message.getSequenceNumber().intValue() ) ) );
081 }
082
083 return sequence;
084 }
085 }