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.shared.kerberos.messages;
21
22
23 import java.nio.ByteBuffer;
24
25 import org.apache.directory.api.asn1.EncoderException;
26 import org.apache.directory.api.asn1.ber.tlv.TLV;
27 import org.apache.directory.shared.kerberos.KerberosConstants;
28 import org.apache.directory.shared.kerberos.KerberosMessageType;
29 import org.apache.directory.shared.kerberos.components.EncKdcRepPart;
30
31
32 /**
33 * EncTGSRepPart message.
34 * It will store the object described by the ASN.1 grammar :
35 * <pre>
36 * EncTGSRepPart ::= [APPLICATION 26] EncKDCRepPart
37 * </pre>
38 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
39 */
40 public class EncTgsRepPart extends KerberosMessage
41 {
42 /** The EncKdcRepPart */
43 private EncKdcRepPart encKdcRepPart;
44
45 // Storage for computed lengths
46 private int encKdcRepPartLength;
47
48
49 /**
50 * Creates a new instance of EncTgsRepPart.
51 */
52 public EncTgsRepPart()
53 {
54 super( KerberosMessageType.ENC_TGS_REP_PART );
55 }
56
57
58 /**
59 * @return the encKdcRepPart
60 */
61 public EncKdcRepPart getEncKdcRepPart()
62 {
63 return encKdcRepPart;
64 }
65
66
67 /**
68 * @param encKdcRepPart the encKdcRepPart to set
69 */
70 public void setEncKdcRepPart( EncKdcRepPart encKdcRepPart )
71 {
72 this.encKdcRepPart = encKdcRepPart;
73 }
74
75
76 /**
77 * Compute the EncTgsRepPart length
78 * <pre>
79 * EncTgsRepPart :
80 *
81 * 0x7A L1 EncTgsRepPart message
82 * |
83 * +--> 0x30 L2 EncKdcRepPart sequence
84 * </pre>
85 */
86 public int computeLength()
87 {
88 encKdcRepPartLength = encKdcRepPart.computeLength();
89 return 1 + TLV.getNbBytes( encKdcRepPartLength ) + encKdcRepPartLength;
90 }
91
92
93 /**
94 * Encode the EncTgsRepPart component
95 *
96 * @param buffer The buffer containing the encoded result
97 * @return The encoded component
98 * @throws EncoderException If the encoding failed
99 */
100 public ByteBuffer encode( ByteBuffer buffer ) throws EncoderException
101 {
102 if ( buffer == null )
103 {
104 buffer = ByteBuffer.allocate( computeLength() );
105 }
106
107 // The EncAsRepPart Tag
108 buffer.put( ( byte ) KerberosConstants.ENC_TGS_REP_PART_TAG );
109 buffer.put( TLV.getBytes( encKdcRepPartLength ) );
110
111 // The EncKdcRepPart --------------------------------------------------------
112 encKdcRepPart.encode( buffer );
113
114 return buffer;
115 }
116 }