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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.EncKdcRepPart.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.EncKdcRepPart.EncKdcRepPartContainer;
29  import org.apache.directory.shared.kerberos.codec.lastReq.LastReqContainer;
30  import org.apache.directory.shared.kerberos.components.LastReq;
31  import org.slf4j.Logger;
32  import org.slf4j.LoggerFactory;
33  
34  
35  /**
36   * The action used to set the LastReq
37   *
38   * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
39   */
40  public class StoreLastReq extends GrammarAction<EncKdcRepPartContainer>
41  {
42      /** The logger */
43      private static final Logger LOG = LoggerFactory.getLogger( StoreLastReq.class );
44  
45      /** Speedup for logs */
46      private static final boolean IS_DEBUG = LOG.isDebugEnabled();
47  
48  
49      /**
50       * Instantiates a new StoreLastReq action.
51       */
52      public StoreLastReq()
53      {
54          super( "Store the EncKDCRepPart LastReq" );
55      }
56  
57  
58      /**
59       * {@inheritDoc}
60       */
61      public final void action( EncKdcRepPartContainer encKdcRepPartContainer ) throws DecoderException
62      {
63          TLV tlv = encKdcRepPartContainer.getCurrentTLV();
64  
65          // The Length should not be null
66          if ( tlv.getLength() == 0 )
67          {
68              LOG.error( I18n.err( I18n.ERR_01308_ZERO_LENGTH_TLV ) );
69  
70              // This will generate a PROTOCOL_ERROR
71              throw new DecoderException( I18n.err( I18n.ERR_01309_EMPTY_TLV ) );
72          }
73  
74          // Now, let's decode the LastReq
75          LastReqContainer/codec/lastReq/LastReqContainer.html#LastReqContainer">LastReqContainer lastReqContainer = new LastReqContainer();
76  
77          // Decode the LastReq PDU
78          Asn1Decoder.decode( encKdcRepPartContainer.getStream(), lastReqContainer );
79  
80          LastReq lastReq = lastReqContainer.getLastReq();
81  
82          if ( IS_DEBUG )
83          {
84              LOG.debug( "LastReq : {}", lastReq );
85          }
86  
87          encKdcRepPartContainer.getEncKdcRepPart().setLastReq( lastReq );
88  
89          // Update the expected length for the current TLV
90          tlv.setExpectedLength( tlv.getExpectedLength() - tlv.getLength() );
91  
92          // Update the parent
93          encKdcRepPartContainer.updateParent();
94      }
95  }