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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.shared.kerberos.codec.kdcRep.actions;
21  
22  
23  import org.apache.directory.api.asn1.DecoderException;
24  import org.apache.directory.api.asn1.ber.Asn1Decoder;
25  import org.apache.directory.api.asn1.ber.grammar.GrammarAction;
26  import org.apache.directory.api.asn1.ber.tlv.TLV;
27  import org.apache.directory.api.i18n.I18n;
28  import org.apache.directory.shared.kerberos.codec.kdcRep.KdcRepContainer;
29  import org.apache.directory.shared.kerberos.codec.padata.PaDataContainer;
30  import org.apache.directory.shared.kerberos.components.KdcRep;
31  import org.apache.directory.shared.kerberos.components.PaData;
32  import org.slf4j.Logger;
33  import org.slf4j.LoggerFactory;
34  
35  
36  /**
37   * The action used to add a PaData
38   *
39   * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
40   */
41  public class AddPaData extends GrammarAction<KdcRepContainer>
42  {
43      /** The logger */
44      private static final Logger LOG = LoggerFactory.getLogger( AddPaData.class );
45  
46      /** Speedup for logs */
47      private static final boolean IS_DEBUG = LOG.isDebugEnabled();
48  
49  
50      /**
51       * Instantiates a new AddPaData action.
52       */
53      public AddPaData()
54      {
55          super( "KDC-REP Add PA-DATA" );
56      }
57  
58  
59      /**
60       * {@inheritDoc}
61       */
62      public void action( KdcRepContainer kdcRepContainer ) throws DecoderException
63      {
64          TLV tlv = kdcRepContainer.getCurrentTLV();
65  
66          // The Length can't be null
67          if ( tlv.getLength() == 0 )
68          {
69              LOG.error( I18n.err( I18n.ERR_01308_ZERO_LENGTH_TLV ) );
70  
71              // This will generate a PROTOCOL_ERROR
72              throw new DecoderException( I18n.err( I18n.ERR_01309_EMPTY_TLV ) );
73          }
74  
75          // Now, let's decode the PA-DATA
76          PaDataContaineros/codec/padata/PaDataContainer.html#PaDataContainer">PaDataContainer paDataContainer = new PaDataContainer();
77          paDataContainer.setStream( kdcRepContainer.getStream() );
78  
79          // We have to move back to the PA-DATA tag
80          kdcRepContainer.rewind();
81  
82          // Decode the PA-DATA PDU
83          Asn1Decoder.decode( kdcRepContainer.getStream(), paDataContainer );
84  
85          // Update the parent
86          kdcRepContainer.updateParent();
87  
88          // Update the expected length for the current TLV
89          tlv.setExpectedLength( tlv.getExpectedLength() - tlv.getLength() );
90  
91          // Store the PData in the container
92          PaData paData = paDataContainer.getPaData();
93          KdcRep kdcRep = kdcRepContainer.getKdcRep();
94          kdcRep.addPaData( paData );
95  
96          if ( IS_DEBUG )
97          {
98              LOG.debug( "Added PA-DATA:  {}", paData );
99          }
100     }
101 }