/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
package org.apache.directory.shared.kerberos.codec.encryptedData;
import org.apache.directory.shared.asn1.actions.CheckNotNullLength;
import org.apache.directory.shared.asn1.ber.grammar.AbstractGrammar;
import org.apache.directory.shared.asn1.ber.grammar.Grammar;
import org.apache.directory.shared.asn1.ber.grammar.GrammarTransition;
import org.apache.directory.shared.asn1.ber.tlv.UniversalTag;
import org.apache.directory.shared.kerberos.KerberosConstants;
import org.apache.directory.shared.kerberos.codec.encryptedData.actions.EncryptedDataInit;
import org.apache.directory.shared.kerberos.codec.encryptedData.actions.StoreCipher;
import org.apache.directory.shared.kerberos.codec.encryptedData.actions.StoreEType;
import org.apache.directory.shared.kerberos.codec.encryptedData.actions.StoreKvno;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* This class implements the EncryptedData structure. All the actions are declared
* in this class. As it is a singleton, these declaration are only done once. If
* an action is to be added or modified, this is where the work is to be done !
*
* @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
*/
public final class EncryptedDataGrammar extends AbstractGrammar<EncryptedDataContainer>
{
/** The logger */
static final Logger LOG = LoggerFactory.getLogger( EncryptedDataGrammar.class );
/** A speedup for logger */
static final boolean IS_DEBUG = LOG.isDebugEnabled();
/** The instance of grammar. EncryptedDataGrammar is a singleton */
private static Grammar<EncryptedDataContainer> instance = new EncryptedDataGrammar();
/**
* Creates a new EncryptedDataGrammar object.
*/
@SuppressWarnings("unchecked")
private EncryptedDataGrammar()
{
setName( EncryptedDataGrammar.class.getName() );
// Create the transitions table
super.transitions = new GrammarTransition[EncryptedDataStatesEnum.LAST_ENCRYPTED_DATA_STATE.ordinal()][256];
// ============================================================================================
// EncryptedData
// ============================================================================================
// --------------------------------------------------------------------------------------------
// Transition from EncryptedData init to EncryptedData SEQ
// --------------------------------------------------------------------------------------------
// EncryptedData ::= SEQUENCE
super.transitions[EncryptedDataStatesEnum.START_STATE.ordinal()][UniversalTag.SEQUENCE.getValue()] =
new GrammarTransition<EncryptedDataContainer>(
EncryptedDataStatesEnum.START_STATE,
EncryptedDataStatesEnum.ENCRYPTED_DATA_SEQ_STATE,
UniversalTag.SEQUENCE,
new EncryptedDataInit() );
// --------------------------------------------------------------------------------------------
// Transition from EncryptedData SEQ to etype tag
// --------------------------------------------------------------------------------------------
// EncryptedData ::= SEQUENCE {
// etype [0]
super.transitions[EncryptedDataStatesEnum.ENCRYPTED_DATA_SEQ_STATE.ordinal()][KerberosConstants.ENCRYPTED_DATA_ETYPE_TAG] =
new GrammarTransition<EncryptedDataContainer>(
EncryptedDataStatesEnum.ENCRYPTED_DATA_SEQ_STATE,
EncryptedDataStatesEnum.ENCRYPTED_DATA_ETYPE_TAG_STATE,
KerberosConstants.ENCRYPTED_DATA_ETYPE_TAG,
new CheckNotNullLength<EncryptedDataContainer>() );
// --------------------------------------------------------------------------------------------
// Transition from etype tag to etype value
// --------------------------------------------------------------------------------------------
// EncryptedData ::= SEQUENCE {
// etype [0] Int32,
super.transitions[EncryptedDataStatesEnum.ENCRYPTED_DATA_ETYPE_TAG_STATE.ordinal()][UniversalTag.INTEGER
.getValue()] =
new GrammarTransition<EncryptedDataContainer>(
EncryptedDataStatesEnum.ENCRYPTED_DATA_ETYPE_TAG_STATE,
EncryptedDataStatesEnum.ENCRYPTED_DATA_ETYPE_STATE,
UniversalTag.INTEGER,
new StoreEType() );
// --------------------------------------------------------------------------------------------
// Transition from etype value to kvno tag
// --------------------------------------------------------------------------------------------
// EncryptedData ::= SEQUENCE {
// ...
// kvno [1]
super.transitions[EncryptedDataStatesEnum.ENCRYPTED_DATA_ETYPE_STATE.ordinal()][KerberosConstants.ENCRYPTED_DATA_KVNO_TAG] =
new GrammarTransition<EncryptedDataContainer>(
EncryptedDataStatesEnum.ENCRYPTED_DATA_ETYPE_STATE,
EncryptedDataStatesEnum.ENCRYPTED_DATA_KVNO_TAG_STATE,
KerberosConstants.ENCRYPTED_DATA_KVNO_TAG,
new CheckNotNullLength<EncryptedDataContainer>() );
// --------------------------------------------------------------------------------------------
// Transition from etype value to cipher tag (kvno is missing)
// --------------------------------------------------------------------------------------------
// EncryptedData ::= SEQUENCE {
// ...
// cipher [2]
super.transitions[EncryptedDataStatesEnum.ENCRYPTED_DATA_ETYPE_STATE.ordinal()][KerberosConstants.ENCRYPTED_DATA_CIPHER_TAG] =
new GrammarTransition<EncryptedDataContainer>(
EncryptedDataStatesEnum.ENCRYPTED_DATA_ETYPE_STATE,
EncryptedDataStatesEnum.ENCRYPTED_DATA_CIPHER_TAG_STATE,
KerberosConstants.ENCRYPTED_DATA_CIPHER_TAG,
new CheckNotNullLength<EncryptedDataContainer>() );
// --------------------------------------------------------------------------------------------
// Transition from kvno tag to kvno value
// --------------------------------------------------------------------------------------------
// EncryptedData ::= SEQUENCE {
// ...
// kvno [1] UInt32
super.transitions[EncryptedDataStatesEnum.ENCRYPTED_DATA_KVNO_TAG_STATE.ordinal()][UniversalTag.INTEGER
.getValue()] =
new GrammarTransition<EncryptedDataContainer>(
EncryptedDataStatesEnum.ENCRYPTED_DATA_KVNO_TAG_STATE,
EncryptedDataStatesEnum.ENCRYPTED_DATA_KVNO_STATE,
UniversalTag.INTEGER,
new StoreKvno() );
// --------------------------------------------------------------------------------------------
// Transition from kvno value value to cipher tag
// --------------------------------------------------------------------------------------------
// EncryptedData ::= SEQUENCE {
// ...
// cipher [2]
super.transitions[EncryptedDataStatesEnum.ENCRYPTED_DATA_KVNO_STATE.ordinal()][KerberosConstants.ENCRYPTED_DATA_CIPHER_TAG] =
new GrammarTransition<EncryptedDataContainer>(
EncryptedDataStatesEnum.ENCRYPTED_DATA_KVNO_STATE,
EncryptedDataStatesEnum.ENCRYPTED_DATA_CIPHER_TAG_STATE,
KerberosConstants.ENCRYPTED_DATA_CIPHER_TAG,
new CheckNotNullLength<EncryptedDataContainer>() );
// --------------------------------------------------------------------------------------------
// Transition from cipher tag to cipher value
// --------------------------------------------------------------------------------------------
// EncryptedData ::= SEQUENCE {
// ...
// cipher [2] OCTET STRING
super.transitions[EncryptedDataStatesEnum.ENCRYPTED_DATA_CIPHER_TAG_STATE.ordinal()][UniversalTag.OCTET_STRING
.getValue()] =
new GrammarTransition<EncryptedDataContainer>(
EncryptedDataStatesEnum.ENCRYPTED_DATA_CIPHER_TAG_STATE,
EncryptedDataStatesEnum.ENCRYPTED_DATA_CIPHER_STATE,
UniversalTag.OCTET_STRING,
new StoreCipher() );
}
/**
* Get the instance of this grammar
*
* @return An instance on the EncryptedData Grammar
*/
public static Grammar<EncryptedDataContainer> getInstance()
{
return instance;
}
}