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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 org.apache.directory.server.kerberos.shared.messages.value.Checksum;
24  import org.apache.directory.shared.asn1.der.DERInteger;
25  import org.apache.directory.shared.asn1.der.DEROctetString;
26  import org.apache.directory.shared.asn1.der.DERSequence;
27  import org.apache.directory.shared.asn1.der.DERTaggedObject;
28  
29  
30  /**
31   * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
32   * @version $Rev: 540371 $, $Date: 2007-05-22 02:00:43 +0200 (Di, 22 Mai 2007) $
33   */
34  public class ChecksumEncoder
35  {
36      /**
37       * Encodes a {@link Checksum} into a {@link DERSequence}.
38       * 
39       * Checksum ::=   SEQUENCE {
40       *          cksumtype[0]   INTEGER,
41       *          checksum[1]    OCTET STRING
42       * }
43       * 
44       * @param checksum 
45       * @return The {@link DERSequence}.
46       */
47      public static DERSequence encode( Checksum checksum )
48      {
49          DERSequence vector = new DERSequence();
50  
51          vector.add( new DERTaggedObject( 0, DERInteger.valueOf( checksum.getChecksumType().getOrdinal() ) ) );
52          vector.add( new DERTaggedObject( 1, new DEROctetString( checksum.getChecksumValue() ) ) );
53  
54          return vector;
55      }
56  }