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.decoder; 021 022 023 import java.io.IOException; 024 import java.util.Enumeration; 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.server.kerberos.shared.messages.components.EncKrbPrivPartModifier; 029 import org.apache.directory.shared.asn1.der.ASN1InputStream; 030 import org.apache.directory.shared.asn1.der.DERApplicationSpecific; 031 import org.apache.directory.shared.asn1.der.DEREncodable; 032 import org.apache.directory.shared.asn1.der.DERGeneralizedTime; 033 import org.apache.directory.shared.asn1.der.DERInteger; 034 import org.apache.directory.shared.asn1.der.DEROctetString; 035 import org.apache.directory.shared.asn1.der.DERSequence; 036 import org.apache.directory.shared.asn1.der.DERTaggedObject; 037 038 039 /** 040 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 041 * @version $Rev: 502338 $, $Date: 2007-02-01 20:59:43 +0100 (Thu, 01 Feb 2007) $ 042 */ 043 public class EncKrbPrivPartDecoder implements Decoder, DecoderFactory 044 { 045 public Decoder getDecoder() 046 { 047 return new EncKrbPrivPartDecoder(); 048 } 049 050 051 public Encodable decode( byte[] encodedPrivatePart ) throws IOException 052 { 053 ASN1InputStream ais = new ASN1InputStream( encodedPrivatePart ); 054 055 DERApplicationSpecific app = ( DERApplicationSpecific ) ais.readObject(); 056 057 DERSequence privatePart = ( DERSequence ) app.getObject(); 058 059 return decodePrivatePartSequence( privatePart ); 060 } 061 062 063 private EncKrbPrivPart decodePrivatePartSequence( DERSequence sequence ) 064 { 065 EncKrbPrivPartModifier modifier = new EncKrbPrivPartModifier(); 066 067 for ( Enumeration e = sequence.getObjects(); e.hasMoreElements(); ) 068 { 069 DERTaggedObject object = ( DERTaggedObject ) e.nextElement(); 070 int tag = object.getTagNo(); 071 DEREncodable derObject = object.getObject(); 072 073 switch ( tag ) 074 { 075 case 0: 076 DEROctetString tag0 = ( DEROctetString ) derObject; 077 modifier.setUserData( tag0.getOctets() ); 078 break; 079 case 1: 080 DERGeneralizedTime tag1 = ( DERGeneralizedTime ) derObject; 081 modifier.setTimestamp( KerberosTimeDecoder.decode( tag1 ) ); 082 break; 083 case 2: 084 DERInteger tag2 = ( DERInteger ) derObject; 085 modifier.setMicroSecond( new Integer( tag2.intValue() ) ); 086 break; 087 case 3: 088 DERInteger tag3 = ( DERInteger ) derObject; 089 modifier.setSequenceNumber( new Integer( tag3.intValue() ) ); 090 break; 091 case 4: 092 DERSequence tag4 = ( DERSequence ) derObject; 093 modifier.setSenderAddress( HostAddressDecoder.decode( tag4 ) ); 094 break; 095 case 5: 096 DERSequence tag5 = ( DERSequence ) derObject; 097 modifier.setRecipientAddress( HostAddressDecoder.decode( tag5 ) ); 098 break; 099 } 100 } 101 return modifier.getEncKrbPrivPart(); 102 } 103 }