/*
* 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.krbPriv;
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.krbPriv.actions.CheckMsgType;
import org.apache.directory.shared.kerberos.codec.krbPriv.actions.KrbPrivInit;
import org.apache.directory.shared.kerberos.codec.krbPriv.actions.StoreEncPart;
import org.apache.directory.shared.kerberos.codec.krbPriv.actions.StorePvno;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* This class implements the KRB-PRIV 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 KrbPrivGrammar extends AbstractGrammar<KrbPrivContainer>
{
/** The logger */
static final Logger LOG = LoggerFactory.getLogger( KrbPrivGrammar.class );
/** A speedup for logger */
static final boolean IS_DEBUG = LOG.isDebugEnabled();
/** The instance of grammar. KrbPrivGrammar is a singleton */
private static Grammar<KrbPrivContainer> instance = new KrbPrivGrammar();
/**
* Creates a new KrbPrivGrammar object.
*/
@SuppressWarnings("unchecked")
private KrbPrivGrammar()
{
setName( KrbPrivGrammar.class.getName() );
// Create the transitions table
super.transitions = new GrammarTransition[KrbPrivStatesEnum.LAST_KRB_PRIV_STATE.ordinal()][256];
// ============================================================================================
// KRB_PRIV
// ============================================================================================
// --------------------------------------------------------------------------------------------
// Transition from KrbPriv init to KrbPriv tag
// --------------------------------------------------------------------------------------------
// KRB_PRIV ::= [APPLICATION 21]
super.transitions[KrbPrivStatesEnum.START_STATE.ordinal()][KerberosConstants.KRB_PRIV_TAG] =
new GrammarTransition<KrbPrivContainer>(
KrbPrivStatesEnum.START_STATE,
KrbPrivStatesEnum.KRB_PRIV_TAG_STATE,
KerberosConstants.KRB_PRIV_TAG,
new KrbPrivInit() );
// --------------------------------------------------------------------------------------------
// Transition from KrbPriv tag to KrbPriv SEQ
// --------------------------------------------------------------------------------------------
// KRB_PRIV ::= [APPLICATION 21] SEQUENCE {
super.transitions[KrbPrivStatesEnum.KRB_PRIV_TAG_STATE.ordinal()][UniversalTag.SEQUENCE.getValue()] =
new GrammarTransition<KrbPrivContainer>(
KrbPrivStatesEnum.KRB_PRIV_TAG_STATE,
KrbPrivStatesEnum.KRB_PRIV_SEQ_STATE,
UniversalTag.SEQUENCE,
new CheckNotNullLength<KrbPrivContainer>() );
// --------------------------------------------------------------------------------------------
// Transition from KrbPriv SEQ to pvno tag
// --------------------------------------------------------------------------------------------
// KRB_PRIV ::= SEQUENCE {
// pvno [0]
super.transitions[KrbPrivStatesEnum.KRB_PRIV_SEQ_STATE.ordinal()][KerberosConstants.KRB_PRIV_PVNO_TAG] =
new GrammarTransition<KrbPrivContainer>(
KrbPrivStatesEnum.KRB_PRIV_SEQ_STATE,
KrbPrivStatesEnum.KRB_PRIV_PVNO_TAG_STATE,
KerberosConstants.KRB_PRIV_PVNO_TAG,
new CheckNotNullLength<KrbPrivContainer>() );
// --------------------------------------------------------------------------------------------
// Transition from pvno tag to pvno value
// --------------------------------------------------------------------------------------------
// KRB_PRIV ::= SEQUENCE {
// pvno [0] INTEGER (5) ,
super.transitions[KrbPrivStatesEnum.KRB_PRIV_PVNO_TAG_STATE.ordinal()][UniversalTag.INTEGER.getValue()] =
new GrammarTransition<KrbPrivContainer>(
KrbPrivStatesEnum.KRB_PRIV_PVNO_TAG_STATE,
KrbPrivStatesEnum.KRB_PRIV_PVNO_STATE,
UniversalTag.INTEGER,
new StorePvno() );
// --------------------------------------------------------------------------------------------
// Transition from pvno to msg-type tag
// --------------------------------------------------------------------------------------------
// msg-type [1]
super.transitions[KrbPrivStatesEnum.KRB_PRIV_PVNO_STATE.ordinal()][KerberosConstants.KRB_PRIV_MSGTYPE_TAG] =
new GrammarTransition<KrbPrivContainer>(
KrbPrivStatesEnum.KRB_PRIV_PVNO_STATE,
KrbPrivStatesEnum.KRB_PRIV_MSGTYPE_TAG_STATE,
KerberosConstants.KRB_PRIV_MSGTYPE_TAG,
new CheckNotNullLength<KrbPrivContainer>() );
// --------------------------------------------------------------------------------------------
// Transition from msg-type tag to msg-type value
// --------------------------------------------------------------------------------------------
// msg-type [1] INTEGER (30)
super.transitions[KrbPrivStatesEnum.KRB_PRIV_MSGTYPE_TAG_STATE.ordinal()][UniversalTag.INTEGER.getValue()] =
new GrammarTransition<KrbPrivContainer>(
KrbPrivStatesEnum.KRB_PRIV_MSGTYPE_TAG_STATE,
KrbPrivStatesEnum.KRB_PRIV_MSGTYPE_STATE,
UniversalTag.INTEGER,
new CheckMsgType() );
// --------------------------------------------------------------------------------------------
// Transition from msg-type value to enc-part tag
// --------------------------------------------------------------------------------------------
// enc-part [3] [3] EncryptedData -- EncKrbPrivPart
super.transitions[KrbPrivStatesEnum.KRB_PRIV_MSGTYPE_STATE.ordinal()][KerberosConstants.KRB_PRIV_ENC_PART_TAG] =
new GrammarTransition<KrbPrivContainer>(
KrbPrivStatesEnum.KRB_PRIV_MSGTYPE_STATE,
KrbPrivStatesEnum.KRB_PRIV_EN_PART_TAG_STATE,
KerberosConstants.KRB_PRIV_ENC_PART_TAG,
new StoreEncPart() );
}
/**
* Get the instance of this grammar
*
* @return An instance on the KRB_PRIV Grammar
*/
public static Grammar<KrbPrivContainer> getInstance()
{
return instance;
}
}