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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.application.ApplicationReply;
27  import org.apache.directory.shared.asn1.der.ASN1OutputStream;
28  import org.apache.directory.shared.asn1.der.DERApplicationSpecific;
29  import org.apache.directory.shared.asn1.der.DERInteger;
30  import org.apache.directory.shared.asn1.der.DERSequence;
31  import org.apache.directory.shared.asn1.der.DERTaggedObject;
32  
33  
34  /**
35   * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
36   * @version $Rev: 540371 $, $Date: 2007-05-22 02:00:43 +0200 (Di, 22 Mai 2007) $
37   */
38  public class ApplicationReplyEncoder
39  {
40      /**
41       * Application code constant for the {@link ApplicationReply} (15).
42       */
43      public static final int APPLICATION_CODE = 15;
44  
45  
46      /**
47       * Encodes an {@link ApplicationReply} into a byte array.
48       *
49       * @param reply
50       * @return The byte array.
51       * @throws IOException
52       */
53      public byte[] encode( ApplicationReply reply ) throws IOException
54      {
55          ByteArrayOutputStream baos = new ByteArrayOutputStream();
56          ASN1OutputStream aos = new ASN1OutputStream( baos );
57  
58          DERSequence replySequence = encodeReplySequence( reply );
59          aos.writeObject( DERApplicationSpecific.valueOf( APPLICATION_CODE, replySequence ) );
60          aos.close();
61  
62          return baos.toByteArray();
63      }
64  
65  
66      private DERSequence encodeReplySequence( ApplicationReply message )
67      {
68          DERSequence sequence = new DERSequence();
69  
70          sequence.add( new DERTaggedObject( 0, DERInteger.valueOf( message.getProtocolVersionNumber() ) ) );
71          sequence.add( new DERTaggedObject( 1, DERInteger.valueOf( message.getMessageType().getOrdinal() ) ) );
72          sequence.add( new DERTaggedObject( 2, EncryptedDataEncoder.encodeSequence( message.getEncPart() ) ) );
73  
74          return sequence;
75      }
76  }