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 */
020 package org.apache.directory.server.kerberos.shared.io.encoder;
021
022
023 import java.io.ByteArrayOutputStream;
024 import java.io.IOException;
025 import java.nio.ByteBuffer;
026
027 import org.apache.directory.server.kerberos.shared.messages.ErrorMessage;
028 import org.apache.directory.shared.asn1.der.ASN1OutputStream;
029 import org.apache.directory.shared.asn1.der.DERApplicationSpecific;
030 import org.apache.directory.shared.asn1.der.DERGeneralString;
031 import org.apache.directory.shared.asn1.der.DERInteger;
032 import org.apache.directory.shared.asn1.der.DEROctetString;
033 import org.apache.directory.shared.asn1.der.DERSequence;
034 import org.apache.directory.shared.asn1.der.DERTaggedObject;
035
036
037 /**
038 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
039 * @version $Rev: 540371 $, $Date: 2007-05-22 03:00:43 +0300 (Tue, 22 May 2007) $
040 */
041 public class ErrorMessageEncoder
042 {
043 /**
044 * Encodes an {@link ErrorMessage} into a {@link ByteBuffer}.
045 *
046 * @param message
047 * @param out
048 * @throws IOException
049 */
050 public void encode( ErrorMessage message, ByteBuffer out ) throws IOException
051 {
052 ASN1OutputStream aos = new ASN1OutputStream( out );
053
054 DERSequence errorReply = encodeErrorMessageSequence( message );
055 aos.writeObject( DERApplicationSpecific.valueOf( message.getMessageType().getOrdinal(), errorReply ) );
056
057 aos.close();
058 }
059
060
061 /**
062 * Encodes an {@link ErrorMessage} into a byte array.
063 *
064 * @param message
065 * @return The byte array.
066 * @throws IOException
067 */
068 public byte[] encode( ErrorMessage message ) throws IOException
069 {
070 ByteArrayOutputStream baos = new ByteArrayOutputStream();
071 ASN1OutputStream aos = new ASN1OutputStream( baos );
072
073 DERSequence errorReply = encodeErrorMessageSequence( message );
074 aos.writeObject( DERApplicationSpecific.valueOf( message.getMessageType().getOrdinal(), errorReply ) );
075
076 aos.close();
077
078 return baos.toByteArray();
079 }
080
081
082 private DERSequence encodeErrorMessageSequence( ErrorMessage message )
083 {
084 DERSequence sequence = new DERSequence();
085
086 sequence.add( new DERTaggedObject( 0, DERInteger.valueOf( message.getProtocolVersionNumber() ) ) );
087
088 sequence.add( new DERTaggedObject( 1, DERInteger.valueOf( message.getMessageType().getOrdinal() ) ) );
089
090 if ( message.getClientTime() != null )
091 {
092 sequence.add( new DERTaggedObject( 2, KerberosTimeEncoder.encode( message.getClientTime() ) ) );
093 }
094
095 if ( message.getClientMicroSecond() != null )
096 {
097 sequence.add( new DERTaggedObject( 3, DERInteger.valueOf( message.getClientMicroSecond().intValue() ) ) );
098 }
099
100 sequence.add( new DERTaggedObject( 4, KerberosTimeEncoder.encode( message.getServerTime() ) ) );
101
102 sequence.add( new DERTaggedObject( 5, DERInteger.valueOf( message.getServerMicroSecond() ) ) );
103
104 sequence.add( new DERTaggedObject( 6, DERInteger.valueOf( message.getErrorCode() ) ) );
105
106 if ( message.getClientPrincipal() != null )
107 {
108 sequence.add( new DERTaggedObject( 7, DERGeneralString.valueOf( message.getClientPrincipal().getRealm()
109 .toString() ) ) );
110 }
111
112 if ( message.getClientPrincipal() != null )
113 {
114 sequence.add( new DERTaggedObject( 8, PrincipalNameEncoder.encode( message.getClientPrincipal() ) ) );
115 }
116
117 sequence.add( new DERTaggedObject( 9, DERGeneralString.valueOf( message.getServerPrincipal().getRealm() ) ) );
118
119 sequence.add( new DERTaggedObject( 10, PrincipalNameEncoder.encode( message.getServerPrincipal() ) ) );
120
121 if ( message.getExplanatoryText() != null )
122 {
123 sequence.add( new DERTaggedObject( 11, DERGeneralString.valueOf( message.getExplanatoryText() ) ) );
124 }
125
126 if ( message.getExplanatoryData() != null )
127 {
128 sequence.add( new DERTaggedObject( 12, new DEROctetString( message.getExplanatoryData() ) ) );
129 }
130
131 return sequence;
132 }
133 }