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.Encodable; 027 import org.apache.directory.server.kerberos.shared.messages.components.EncKrbPrivPart; 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.DERInteger; 031 import org.apache.directory.shared.asn1.der.DEROctetString; 032 import org.apache.directory.shared.asn1.der.DERSequence; 033 import org.apache.directory.shared.asn1.der.DERTaggedObject; 034 035 036 /** 037 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 038 * @version $Rev: 547131 $, $Date: 2007-06-14 07:41:06 +0200 (Thu, 14 Jun 2007) $ 039 */ 040 public class EncKrbPrivPartEncoder implements Encoder, EncoderFactory 041 { 042 private static final int APPLICATION_CODE = 28; 043 044 045 public Encoder getEncoder() 046 { 047 return new EncKrbPrivPartEncoder(); 048 } 049 050 051 public byte[] encode( Encodable privPart ) throws IOException 052 { 053 ByteArrayOutputStream baos = new ByteArrayOutputStream(); 054 ASN1OutputStream aos = new ASN1OutputStream( baos ); 055 056 DERSequence privPartSequence = encodePrivatePartSequence( ( EncKrbPrivPart ) privPart ); 057 aos.writeObject( DERApplicationSpecific.valueOf( APPLICATION_CODE, privPartSequence ) ); 058 aos.close(); 059 060 return baos.toByteArray(); 061 } 062 063 064 /** 065 * Encodes an {@link EncKrbPrivPart} into a {@link DERSequence}. 066 * 067 * EncKrbPrivPart ::= [APPLICATION 28] SEQUENCE { 068 * user-data [0] OCTET STRING, 069 * timestamp [1] KerberosTime OPTIONAL, 070 * usec [2] Microseconds OPTIONAL, 071 * seq-number [3] UInt32 OPTIONAL, 072 * s-address [4] HostAddress -- sender's addr --, 073 * r-address [5] HostAddress OPTIONAL -- recip's addr 074 * } 075 * 076 * @param message 077 * @return The {@link DERSequence}; 078 */ 079 private DERSequence encodePrivatePartSequence( EncKrbPrivPart message ) 080 { 081 DERSequence sequence = new DERSequence(); 082 083 sequence.add( new DERTaggedObject( 0, new DEROctetString( message.getUserData() ) ) ); 084 085 if ( message.getTimestamp() != null ) 086 { 087 sequence.add( new DERTaggedObject( 1, KerberosTimeEncoder.encode( message.getTimestamp() ) ) ); 088 } 089 090 if ( message.getMicroSecond() != null ) 091 { 092 sequence.add( new DERTaggedObject( 2, DERInteger.valueOf( message.getMicroSecond().intValue() ) ) ); 093 } 094 095 if ( message.getSequenceNumber() != null ) 096 { 097 sequence.add( new DERTaggedObject( 3, DERInteger.valueOf( message.getSequenceNumber().intValue() ) ) ); 098 } 099 100 sequence.add( new DERTaggedObject( 4, HostAddressesEncoder.encode( message.getSenderAddress() ) ) ); 101 102 if ( message.getRecipientAddress() != null ) 103 { 104 sequence.add( new DERTaggedObject( 5, HostAddressesEncoder.encode( message.getRecipientAddress() ) ) ); 105 } 106 107 return sequence; 108 } 109 }