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; 025 026 import org.apache.directory.server.kerberos.shared.messages.application.PrivateMessage; 027 import org.apache.directory.shared.asn1.der.ASN1OutputStream; 028 import org.apache.directory.shared.asn1.der.DERApplicationSpecific; 029 import org.apache.directory.shared.asn1.der.DERInteger; 030 import org.apache.directory.shared.asn1.der.DERSequence; 031 import org.apache.directory.shared.asn1.der.DERTaggedObject; 032 033 034 /** 035 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 036 * @version $Rev: 540371 $, $Date: 2007-05-22 02:00:43 +0200 (Tue, 22 May 2007) $ 037 */ 038 public class PrivateMessageEncoder 039 { 040 /** 041 * Encodes a {@link PrivateMessage} into a byte array. 042 * 043 * @param message 044 * @return The byte array. 045 * @throws IOException 046 */ 047 public byte[] encode( PrivateMessage message ) throws IOException 048 { 049 ByteArrayOutputStream baos = new ByteArrayOutputStream(); 050 ASN1OutputStream aos = new ASN1OutputStream( baos ); 051 052 DERSequence privateMessageSequence = encodePrivateMessageSequence( message ); 053 aos 054 .writeObject( DERApplicationSpecific 055 .valueOf( message.getMessageType().getOrdinal(), privateMessageSequence ) ); 056 aos.close(); 057 058 return baos.toByteArray(); 059 } 060 061 062 private DERSequence encodePrivateMessageSequence( PrivateMessage message ) 063 { 064 DERSequence sequence = new DERSequence(); 065 066 sequence.add( new DERTaggedObject( 0, DERInteger.valueOf( message.getProtocolVersionNumber() ) ) ); 067 sequence.add( new DERTaggedObject( 1, DERInteger.valueOf( message.getMessageType().getOrdinal() ) ) ); 068 sequence.add( new DERTaggedObject( 3, EncryptedDataEncoder.encodeSequence( message.getEncryptedPart() ) ) ); 069 070 return sequence; 071 } 072 }