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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.shared.io.encoder;
21  
22  
23  import java.io.ByteArrayOutputStream;
24  import java.io.IOException;
25  
26  import org.apache.directory.server.kerberos.shared.messages.Encodable;
27  import org.apache.directory.server.kerberos.shared.messages.components.EncApRepPart;
28  import org.apache.directory.shared.asn1.der.ASN1OutputStream;
29  import org.apache.directory.shared.asn1.der.DERApplicationSpecific;
30  import org.apache.directory.shared.asn1.der.DERInteger;
31  import org.apache.directory.shared.asn1.der.DERSequence;
32  import org.apache.directory.shared.asn1.der.DERTaggedObject;
33  
34  
35  /**
36   * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
37   * @version $Rev: 540371 $, $Date: 2007-05-22 02:00:43 +0200 (Di, 22 Mai 2007) $
38   */
39  public class EncApRepPartEncoder implements Encoder, EncoderFactory
40  {
41      /**
42       * The application code constant for the {@link EncApRepPart} (27).
43       */
44      public static final int APPLICATION_CODE = 27;
45  
46  
47      public Encoder getEncoder()
48      {
49          return new EncApRepPartEncoder();
50      }
51  
52  
53      public byte[] encode( Encodable apRepPart ) throws IOException
54      {
55          ByteArrayOutputStream baos = new ByteArrayOutputStream();
56          ASN1OutputStream aos = new ASN1OutputStream( baos );
57  
58          DERSequence privPartSequence = encodeApRepPartSequence( ( EncApRepPart ) apRepPart );
59          aos.writeObject( DERApplicationSpecific.valueOf( APPLICATION_CODE, privPartSequence ) );
60          aos.close();
61  
62          return baos.toByteArray();
63      }
64  
65  
66      private DERSequence encodeApRepPartSequence( EncApRepPart message )
67      {
68          DERSequence sequence = new DERSequence();
69  
70          sequence.add( new DERTaggedObject( 0, KerberosTimeEncoder.encode( message.getClientTime() ) ) );
71          sequence.add( new DERTaggedObject( 1, DERInteger.valueOf( message.getClientMicroSecond() ) ) );
72  
73          if ( message.getSubSessionKey() != null )
74          {
75              sequence.add( new DERTaggedObject( 2, EncryptionKeyEncoder.encodeSequence( message.getSubSessionKey() ) ) );
76          }
77  
78          if ( message.getSequenceNumber() != null )
79          {
80              sequence.add( new DERTaggedObject( 3, DERInteger.valueOf( message.getSequenceNumber().intValue() ) ) );
81          }
82  
83          return sequence;
84      }
85  }