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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.value.EncryptedTimeStamp;
28  import org.apache.directory.shared.asn1.der.ASN1OutputStream;
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 EncryptedTimestampEncoder implements Encoder, EncoderFactory
39  {
40      public byte[] encode( Encodable encryptedTimestamp ) throws IOException
41      {
42          ByteArrayOutputStream baos = new ByteArrayOutputStream();
43          ASN1OutputStream aos = new ASN1OutputStream( baos );
44  
45          aos.writeObject( encodeTimestamp( ( EncryptedTimeStamp ) encryptedTimestamp ) );
46          aos.close();
47  
48          return baos.toByteArray();
49      }
50  
51  
52      public Encoder getEncoder()
53      {
54          return new EncryptedTimestampEncoder();
55      }
56  
57  
58      /**
59       * PA-ENC-TS-ENC   ::= SEQUENCE {
60       *         patimestamp[0]               KerberosTime, -- client's time
61       *         pausec[1]                    INTEGER OPTIONAL
62       * }
63       */
64      private DERSequence encodeTimestamp( EncryptedTimeStamp encryptedTimestamp )
65      {
66          DERSequence sequence = new DERSequence();
67  
68          sequence.add( new DERTaggedObject( 0, KerberosTimeEncoder.encode( encryptedTimestamp.getTimeStamp() ) ) );
69  
70          if ( encryptedTimestamp.getMicroSeconds() > 0 )
71          {
72              sequence.add( new DERTaggedObject( 1, DERInteger.valueOf( encryptedTimestamp.getMicroSeconds() ) ) );
73          }
74  
75          return sequence;
76      }
77  }