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.padata;
21
22
23 import org.apache.directory.api.asn1.actions.CheckNotNullLength;
24 import org.apache.directory.api.asn1.ber.grammar.AbstractGrammar;
25 import org.apache.directory.api.asn1.ber.grammar.Grammar;
26 import org.apache.directory.api.asn1.ber.grammar.GrammarTransition;
27 import org.apache.directory.api.asn1.ber.tlv.UniversalTag;
28 import org.apache.directory.shared.kerberos.KerberosConstants;
29 import org.apache.directory.shared.kerberos.codec.padata.actions.PaDataInit;
30 import org.apache.directory.shared.kerberos.codec.padata.actions.StoreDataType;
31 import org.apache.directory.shared.kerberos.codec.padata.actions.StorePaDataValue;
32 import org.slf4j.Logger;
33 import org.slf4j.LoggerFactory;
34
35
36 /**
37 * This class implements the PaData structure. All the actions are declared
38 * in this class. As it is a singleton, these declaration are only done once. If
39 * an action is to be added or modified, this is where the work is to be done !
40 *
41 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
42 */
43 public final class PaDataGrammar extends AbstractGrammar<PaDataContainer>
44 {
45 /** The logger */
46 static final Logger LOG = LoggerFactory.getLogger( PaDataGrammar.class );
47
48 /** A speedup for logger */
49 static final boolean IS_DEBUG = LOG.isDebugEnabled();
50
51 /** The instance of grammar. PaDataGrammar is a singleton */
52 private static Grammar<PaDataContainer> instance = new PaDataGrammar();
53
54
55 /**
56 * Creates a new PaDataGrammar object.
57 */
58 @SuppressWarnings("unchecked")
59 private PaDataGrammar()
60 {
61 setName( PaDataGrammar.class.getName() );
62
63 // Create the transitions table
64 super.transitions = new GrammarTransition[PaDataStatesEnum.LAST_PADATA_STATE.ordinal()][256];
65
66 // ============================================================================================
67 // PaData
68 // ============================================================================================
69 // --------------------------------------------------------------------------------------------
70 // Transition from PaData init to PaData SEQ OF
71 // --------------------------------------------------------------------------------------------
72 // PA-DATA ::= SEQUENCE {
73 super.transitions[PaDataStatesEnum.START_STATE.ordinal()][UniversalTag.SEQUENCE.getValue()] =
74 new GrammarTransition<PaDataContainer>(
75 PaDataStatesEnum.START_STATE,
76 PaDataStatesEnum.PADATA_SEQ_STATE,
77 UniversalTag.SEQUENCE,
78 new PaDataInit() );
79
80 // --------------------------------------------------------------------------------------------
81 // Transition from PaData SEQ to padata-type tag
82 // --------------------------------------------------------------------------------------------
83 // PA-DATA ::= SEQUENCE {
84 // padata-type [1]
85 super.transitions[PaDataStatesEnum.PADATA_SEQ_STATE.ordinal()][KerberosConstants.PADATA_TYPE_TAG] =
86 new GrammarTransition<PaDataContainer>(
87 PaDataStatesEnum.PADATA_SEQ_STATE,
88 PaDataStatesEnum.PADATA_TYPE_TAG_STATE,
89 KerberosConstants.PADATA_TYPE_TAG,
90 new CheckNotNullLength<PaDataContainer>() );
91
92 // --------------------------------------------------------------------------------------------
93 // Transition from PaData type tag to padata-type
94 // --------------------------------------------------------------------------------------------
95 // PA-DATA ::= SEQUENCE {
96 // padata-type [1] Int32
97 super.transitions[PaDataStatesEnum.PADATA_TYPE_TAG_STATE.ordinal()][UniversalTag.INTEGER.getValue()] =
98 new GrammarTransition<PaDataContainer>(
99 PaDataStatesEnum.PADATA_TYPE_TAG_STATE,
100 PaDataStatesEnum.PADATA_TYPE_STATE,
101 UniversalTag.INTEGER,
102 new StoreDataType() );
103
104 // --------------------------------------------------------------------------------------------
105 // Transition from padata-type to padata-value tag
106 // --------------------------------------------------------------------------------------------
107 // PA-DATA ::= SEQUENCE {
108 // padata-value [2]
109 super.transitions[PaDataStatesEnum.PADATA_TYPE_STATE.ordinal()][KerberosConstants.PADATA_VALUE_TAG] =
110 new GrammarTransition<PaDataContainer>(
111 PaDataStatesEnum.PADATA_TYPE_STATE,
112 PaDataStatesEnum.PADATA_VALUE_TAG_STATE,
113 KerberosConstants.PADATA_VALUE_TAG,
114 new CheckNotNullLength<PaDataContainer>() );
115
116 // --------------------------------------------------------------------------------------------
117 // Transition from padata-value tag to padata-value
118 // --------------------------------------------------------------------------------------------
119 // PA-DATA ::= SEQUENCE {
120 // padata-value [2] OCTET STRING
121 super.transitions[PaDataStatesEnum.PADATA_VALUE_TAG_STATE.ordinal()][UniversalTag.OCTET_STRING.getValue()] =
122 new GrammarTransition<PaDataContainer>(
123 PaDataStatesEnum.PADATA_VALUE_TAG_STATE,
124 PaDataStatesEnum.PADATA_VALUE_STATE,
125 UniversalTag.OCTET_STRING,
126 new StorePaDataValue() );
127 }
128
129
130 /**
131 * Get the instance of this grammar
132 *
133 * @return An instance on the PaData Grammar
134 */
135 public static Grammar<PaDataContainer> getInstance()
136 {
137 return instance;
138 }
139 }