/*
* 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.actions;
import org.apache.directory.shared.asn1.DecoderException;
import org.apache.directory.shared.asn1.ber.Asn1Container;
import org.apache.directory.shared.asn1.ber.grammar.GrammarAction;
import org.apache.directory.shared.asn1.ber.tlv.IntegerDecoder;
import org.apache.directory.shared.asn1.ber.tlv.IntegerDecoderException;
import org.apache.directory.shared.asn1.ber.tlv.TLV;
import org.apache.directory.shared.asn1.ber.tlv.Value;
import org.apache.directory.shared.i18n.I18n;
import org.apache.directory.shared.kerberos.KerberosMessageType;
import org.apache.directory.shared.kerberos.codec.kdcRep.KdcRepContainer;
import org.apache.directory.shared.kerberos.codec.kdcReq.KdcReqContainer;
import org.apache.directory.shared.util.Strings;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* The action used to read and validate the msg-type
*
* @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
*/
public abstract class AbstractReadMsgType<E extends Asn1Container> extends GrammarAction<E>
{
/** The logger */
private static final Logger LOG = LoggerFactory.getLogger( AbstractReadMsgType.class );
/** The msgType to decode */
private KerberosMessageType msgType = null;
/**
* Instantiates a new StoreMsgType action.
*/
public AbstractReadMsgType( String name )
{
super( name );
}
/**
* Instantiates a new StoreMsgType action.
*/
public AbstractReadMsgType( String name, KerberosMessageType msgType )
{
super( name );
this.msgType = msgType;
}
/**
* {@inheritDoc}
*/
public final void action( E container ) throws DecoderException
{
TLV tlv = container.getCurrentTLV();
// The Length should not be null and should be 1
if ( tlv.getLength() != 1 )
{
LOG.error( I18n.err( I18n.ERR_04066 ) );
// This will generate a PROTOCOL_ERROR
throw new DecoderException( I18n.err( I18n.ERR_04067 ) );
}
Value value = tlv.getValue();
try
{
int msgTypeValue = IntegerDecoder.parse( value );
if ( msgType != null )
{
if ( msgType.getValue() == msgTypeValue )
{
LOG.debug( "msg-type : {}", msgType );
return;
}
String message = I18n.err( I18n.ERR_04070, Strings.dumpBytes(value.getData()) );
LOG.error( message );
// This will generate a PROTOCOL_ERROR
throw new DecoderException( message );
}
else
{
KerberosMessageType messageType = KerberosMessageType.getTypeByValue( msgTypeValue );
if ( container instanceof KdcReqContainer )
{
if ( ((KdcReqContainer)container).getKdcReq().getMessageType() == messageType )
{
return;
}
}
else if ( container instanceof KdcRepContainer )
{
if ( ((KdcRepContainer)container).getKdcRep().getMessageType() == messageType )
{
return;
}
}
String message = I18n.err( I18n.ERR_04070, Strings.dumpBytes(value.getData()) );
LOG.error( message );
// This will generate a PROTOCOL_ERROR
throw new DecoderException( message );
}
}
catch ( IntegerDecoderException ide )
{
LOG.error( I18n.err( I18n.ERR_04070, Strings.dumpBytes(value.getData()), ide
.getLocalizedMessage() ) );
// This will generate a PROTOCOL_ERROR
throw new DecoderException( ide.getMessage() );
}
}
}