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.EncKrbPrivPart;
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.DEROctetString;
032 import org.apache.directory.shared.asn1.der.DERSequence;
033 import org.apache.directory.shared.asn1.der.DERTaggedObject;
034
035
036 /**
037 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
038 * @version $Rev: 547131 $, $Date: 2007-06-14 08:41:06 +0300 (Thu, 14 Jun 2007) $
039 */
040 public class EncKrbPrivPartEncoder implements Encoder, EncoderFactory
041 {
042 private static final int APPLICATION_CODE = 28;
043
044
045 public Encoder getEncoder()
046 {
047 return new EncKrbPrivPartEncoder();
048 }
049
050
051 public byte[] encode( Encodable privPart ) throws IOException
052 {
053 ByteArrayOutputStream baos = new ByteArrayOutputStream();
054 ASN1OutputStream aos = new ASN1OutputStream( baos );
055
056 DERSequence privPartSequence = encodePrivatePartSequence( ( EncKrbPrivPart ) privPart );
057 aos.writeObject( DERApplicationSpecific.valueOf( APPLICATION_CODE, privPartSequence ) );
058 aos.close();
059
060 return baos.toByteArray();
061 }
062
063
064 /**
065 * Encodes an {@link EncKrbPrivPart} into a {@link DERSequence}.
066 *
067 * EncKrbPrivPart ::= [APPLICATION 28] SEQUENCE {
068 * user-data [0] OCTET STRING,
069 * timestamp [1] KerberosTime OPTIONAL,
070 * usec [2] Microseconds OPTIONAL,
071 * seq-number [3] UInt32 OPTIONAL,
072 * s-address [4] HostAddress -- sender's addr --,
073 * r-address [5] HostAddress OPTIONAL -- recip's addr
074 * }
075 *
076 * @param message
077 * @return The {@link DERSequence};
078 */
079 private DERSequence encodePrivatePartSequence( EncKrbPrivPart message )
080 {
081 DERSequence sequence = new DERSequence();
082
083 sequence.add( new DERTaggedObject( 0, new DEROctetString( message.getUserData() ) ) );
084
085 if ( message.getTimestamp() != null )
086 {
087 sequence.add( new DERTaggedObject( 1, KerberosTimeEncoder.encode( message.getTimestamp() ) ) );
088 }
089
090 if ( message.getMicroSecond() != null )
091 {
092 sequence.add( new DERTaggedObject( 2, DERInteger.valueOf( message.getMicroSecond().intValue() ) ) );
093 }
094
095 if ( message.getSequenceNumber() != null )
096 {
097 sequence.add( new DERTaggedObject( 3, DERInteger.valueOf( message.getSequenceNumber().intValue() ) ) );
098 }
099
100 sequence.add( new DERTaggedObject( 4, HostAddressesEncoder.encode( message.getSenderAddress() ) ) );
101
102 if ( message.getRecipientAddress() != null )
103 {
104 sequence.add( new DERTaggedObject( 5, HostAddressesEncoder.encode( message.getRecipientAddress() ) ) );
105 }
106
107 return sequence;
108 }
109 }