001/* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, 013 * software distributed under the License is distributed on an 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 * KIND, either express or implied. See the License for the 016 * specific language governing permissions and limitations 017 * under the License. 018 * 019 */ 020package org.apache.directory.shared.kerberos.codec.padata; 021 022 023import org.apache.directory.api.asn1.actions.CheckNotNullLength; 024import org.apache.directory.api.asn1.ber.grammar.AbstractGrammar; 025import org.apache.directory.api.asn1.ber.grammar.Grammar; 026import org.apache.directory.api.asn1.ber.grammar.GrammarTransition; 027import org.apache.directory.api.asn1.ber.tlv.UniversalTag; 028import org.apache.directory.shared.kerberos.KerberosConstants; 029import org.apache.directory.shared.kerberos.codec.padata.actions.PaDataInit; 030import org.apache.directory.shared.kerberos.codec.padata.actions.StoreDataType; 031import org.apache.directory.shared.kerberos.codec.padata.actions.StorePaDataValue; 032import org.slf4j.Logger; 033import org.slf4j.LoggerFactory; 034 035 036/** 037 * This class implements the PaData structure. All the actions are declared 038 * in this class. As it is a singleton, these declaration are only done once. If 039 * an action is to be added or modified, this is where the work is to be done ! 040 * 041 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 042 */ 043public final class PaDataGrammar extends AbstractGrammar<PaDataContainer> 044{ 045 /** The logger */ 046 static final Logger LOG = LoggerFactory.getLogger( PaDataGrammar.class ); 047 048 /** A speedup for logger */ 049 static final boolean IS_DEBUG = LOG.isDebugEnabled(); 050 051 /** The instance of grammar. PaDataGrammar is a singleton */ 052 private static Grammar<PaDataContainer> instance = new PaDataGrammar(); 053 054 055 /** 056 * Creates a new PaDataGrammar object. 057 */ 058 @SuppressWarnings("unchecked") 059 private PaDataGrammar() 060 { 061 setName( PaDataGrammar.class.getName() ); 062 063 // Create the transitions table 064 super.transitions = new GrammarTransition[PaDataStatesEnum.LAST_PADATA_STATE.ordinal()][256]; 065 066 // ============================================================================================ 067 // PaData 068 // ============================================================================================ 069 // -------------------------------------------------------------------------------------------- 070 // Transition from PaData init to PaData SEQ OF 071 // -------------------------------------------------------------------------------------------- 072 // PA-DATA ::= SEQUENCE { 073 super.transitions[PaDataStatesEnum.START_STATE.ordinal()][UniversalTag.SEQUENCE.getValue()] = 074 new GrammarTransition<PaDataContainer>( 075 PaDataStatesEnum.START_STATE, 076 PaDataStatesEnum.PADATA_SEQ_STATE, 077 UniversalTag.SEQUENCE, 078 new PaDataInit() ); 079 080 // -------------------------------------------------------------------------------------------- 081 // Transition from PaData SEQ to padata-type tag 082 // -------------------------------------------------------------------------------------------- 083 // PA-DATA ::= SEQUENCE { 084 // padata-type [1] 085 super.transitions[PaDataStatesEnum.PADATA_SEQ_STATE.ordinal()][KerberosConstants.PADATA_TYPE_TAG] = 086 new GrammarTransition<PaDataContainer>( 087 PaDataStatesEnum.PADATA_SEQ_STATE, 088 PaDataStatesEnum.PADATA_TYPE_TAG_STATE, 089 KerberosConstants.PADATA_TYPE_TAG, 090 new CheckNotNullLength<PaDataContainer>() ); 091 092 // -------------------------------------------------------------------------------------------- 093 // Transition from PaData type tag to padata-type 094 // -------------------------------------------------------------------------------------------- 095 // PA-DATA ::= SEQUENCE { 096 // padata-type [1] Int32 097 super.transitions[PaDataStatesEnum.PADATA_TYPE_TAG_STATE.ordinal()][UniversalTag.INTEGER.getValue()] = 098 new GrammarTransition<PaDataContainer>( 099 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}