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.IntegerDecoder;
28 import org.apache.directory.api.asn1.ber.tlv.IntegerDecoderException;
29 import org.apache.directory.api.asn1.ber.tlv.TLV;
30 import org.apache.directory.api.i18n.I18n;
31 import org.slf4j.Logger;
32 import org.slf4j.LoggerFactory;
33
34
35 /**
36 * The action used to read the PVNO
37 *
38 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
39 */
40 public abstract class AbstractReadPvno<E extends Asn1Container> extends GrammarAction<E>
41 {
42 /** The logger */
43 private static final Logger LOG = LoggerFactory.getLogger( AbstractReadPvno.class );
44
45 /** Speedup for logs */
46 private static final boolean IS_DEBUG = LOG.isDebugEnabled();
47
48
49 /**
50 * Creates a new instance of AbstractReadPvno.
51 *
52 * @param name the name of the action
53 */
54 public AbstractReadPvno( String name )
55 {
56 super( name );
57 }
58
59
60 /**
61 * sets the pvno on the ASN.1 object present in the container
62 *
63 * @param pvno the protocol version number received
64 * @param container the ASN.1 object's container
65 */
66 protected abstract void setPvno( int pvno, E container );
67
68
69 /**
70 * {@inheritDoc}
71 */
72 public final void action( E container ) throws DecoderException
73 {
74 TLV tlv = container.getCurrentTLV();
75
76 // The Length should not be null and should be 1
77 if ( tlv.getLength() != 1 )
78 {
79 LOG.error( I18n.err( I18n.ERR_01308_ZERO_LENGTH_TLV ) );
80
81 // This will generate a PROTOCOL_ERROR
82 throw new DecoderException( I18n.err( I18n.ERR_01309_EMPTY_TLV ) );
83 }
84
85 BerValue value = tlv.getValue();
86
87 try
88 {
89 int pvno = IntegerDecoder.parse( value );
90
91 if ( pvno != 5 )
92 {
93 LOG.error( I18n.err( I18n.ERR_01306_VALUE_NOT_IN_RANGE, 5, 5 ) );
94
95 // This will generate a PROTOCOL_ERROR
96 throw new DecoderException( "The PVNO should be 5" );
97 }
98
99 if ( IS_DEBUG )
100 {
101 LOG.debug( "pvno : {}", pvno );
102 }
103
104 setPvno( pvno, container );
105 }
106 catch ( IntegerDecoderException ide )
107 {
108 LOG.error( I18n.err( I18n.ERR_01306_VALUE_NOT_IN_RANGE, 5, 5 ) );
109
110 // This will generate a PROTOCOL_ERROR
111 throw new DecoderException( ide.getMessage() );
112 }
113 }
114 }