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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.actions;
21  
22  
23  import org.apache.directory.api.asn1.DecoderException;
24  import org.apache.directory.api.asn1.ber.Asn1Container;
25  import org.apache.directory.api.asn1.ber.grammar.GrammarAction;
26  import org.apache.directory.api.asn1.ber.tlv.BerValue;
27  import org.apache.directory.api.asn1.ber.tlv.TLV;
28  import org.apache.directory.api.i18n.I18n;
29  import org.apache.directory.api.util.Strings;
30  import org.apache.directory.shared.kerberos.KerberosTime;
31  import org.slf4j.Logger;
32  import org.slf4j.LoggerFactory;
33  
34  
35  /**
36   * The action used to read the KerberosTime
37   *
38   * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
39   */
40  public abstract class AbstractReadKerberosTime<E extends Asn1Container> extends GrammarAction<E>
41  {
42      /** The logger */
43      private static final Logger LOG = LoggerFactory.getLogger( AbstractReadKerberosTime.class );
44  
45      /** Speedup for logs */
46      private static final boolean IS_DEBUG = LOG.isDebugEnabled();
47  
48  
49      /**
50       * Instantiates a new AbstractReadKerberosTime action.
51       */
52      public AbstractReadKerberosTime( String name )
53      {
54          super( name );
55      }
56  
57  
58      /**
59       *
60       * set the KerberosTime on the ASN.1 object present in the container
61       *
62       * @param krbtime the KerberosTime decoded from the TLV
63       * @param container the ASN.1 object's container
64       */
65      protected abstract void setKerberosTime( KerberosTime krbtime, E container );
66  
67  
68      /**
69       * {@inheritDoc}
70       */
71      public final void action( E container ) throws DecoderException
72      {
73          TLV tlv = container.getCurrentTLV();
74  
75          // The Length should not be null and should be 15
76          if ( tlv.getLength() != 15 )
77          {
78              LOG.error( I18n.err( I18n.ERR_01308_ZERO_LENGTH_TLV ) );
79  
80              // This will generate a PROTOCOL_ERROR
81              throw new DecoderException( I18n.err( I18n.ERR_01309_EMPTY_TLV ) );
82          }
83  
84          // The value is the KerberosTime
85          BerValue value = tlv.getValue();
86          String date = Strings.utf8ToString( value.getData() );
87  
88          try
89          {
90              KerberosTimed/kerberos/KerberosTime.html#KerberosTime">KerberosTime krbTime = new KerberosTime( date );
91  
92              if ( IS_DEBUG )
93              {
94                  LOG.debug( "decoded kerberos time is : {}", krbTime );
95              }
96  
97              setKerberosTime( krbTime, container );
98          }
99          catch ( IllegalArgumentException iae )
100         {
101             LOG.error( I18n.err( I18n.ERR_01308_ZERO_LENGTH_TLV ) );
102 
103             // This will generate a PROTOCOL_ERROR
104             throw new DecoderException( I18n.err( I18n.ERR_01309_EMPTY_TLV ) );
105         }
106     }
107 }