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.EncKdcRepPart; 028 import org.apache.directory.server.kerberos.shared.messages.value.KerberosPrincipalModifier; 029 import org.apache.directory.server.kerberos.shared.messages.value.flags.TicketFlags; 030 import org.apache.directory.shared.asn1.der.ASN1InputStream; 031 import org.apache.directory.shared.asn1.der.DERApplicationSpecific; 032 import org.apache.directory.shared.asn1.der.DERBitString; 033 import org.apache.directory.shared.asn1.der.DEREncodable; 034 import org.apache.directory.shared.asn1.der.DERGeneralString; 035 import org.apache.directory.shared.asn1.der.DERGeneralizedTime; 036 import org.apache.directory.shared.asn1.der.DERInteger; 037 import org.apache.directory.shared.asn1.der.DERSequence; 038 import org.apache.directory.shared.asn1.der.DERTaggedObject; 039 040 041 /** 042 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 043 * @version $Rev: 502338 $, $Date: 2007-02-01 11:59:43 -0800 (Thu, 01 Feb 2007) $ 044 */ 045 public class EncKdcRepPartDecoder implements Decoder, DecoderFactory 046 { 047 public Decoder getDecoder() 048 { 049 return new EncKdcRepPartDecoder(); 050 } 051 052 053 public Encodable decode( byte[] encoded ) throws IOException 054 { 055 ASN1InputStream ais = new ASN1InputStream( encoded ); 056 057 DERApplicationSpecific app = ( DERApplicationSpecific ) ais.readObject(); 058 059 DERSequence sequence = ( DERSequence ) app.getObject(); 060 061 return decodeEncKdcRepPartSequence( sequence ); 062 } 063 064 065 /** 066 * EncKDCRepPart ::= SEQUENCE { 067 * key[0] EncryptionKey, 068 * last-req[1] LastReq, 069 * nonce[2] INTEGER, 070 * key-expiration[3] KerberosTime OPTIONAL, 071 * flags[4] TicketFlags, 072 * authtime[5] KerberosTime, 073 * starttime[6] KerberosTime OPTIONAL, 074 * endtime[7] KerberosTime, 075 * renew-till[8] KerberosTime OPTIONAL, 076 * srealm[9] Realm, 077 * sname[10] PrincipalName, 078 * caddr[11] HostAddresses OPTIONAL 079 * } 080 */ 081 private EncKdcRepPart decodeEncKdcRepPartSequence( DERSequence sequence ) 082 { 083 EncKdcRepPart modifier = new EncKdcRepPart(); 084 KerberosPrincipalModifier principalModifier = new KerberosPrincipalModifier(); 085 086 for ( Enumeration<DEREncodable> e = sequence.getObjects(); e.hasMoreElements(); ) 087 { 088 DERTaggedObject object = ( DERTaggedObject ) e.nextElement(); 089 int tag = object.getTagNo(); 090 DEREncodable derObject = object.getObject(); 091 092 switch ( tag ) 093 { 094 case 0: 095 DERSequence tag0 = ( DERSequence ) derObject; 096 modifier.setKey( EncryptionKeyDecoder.decode( tag0 ) ); 097 break; 098 case 1: 099 DERSequence tag1 = ( DERSequence ) derObject; 100 modifier.setLastRequest( LastRequestDecoder.decodeSequence( tag1 ) ); 101 break; 102 case 2: 103 DERInteger tag2 = ( DERInteger ) derObject; 104 modifier.setNonce( new Integer( tag2.intValue() ) ); 105 break; 106 case 3: 107 DERGeneralizedTime tag3 = ( DERGeneralizedTime ) derObject; 108 modifier.setKeyExpiration( KerberosTimeDecoder.decode( tag3 ) ); 109 break; 110 case 4: 111 DERBitString tag4 = ( DERBitString ) derObject; 112 modifier.setFlags( new TicketFlags( tag4.getOctets() ) ); 113 break; 114 case 5: 115 DERGeneralizedTime tag5 = ( DERGeneralizedTime ) derObject; 116 modifier.setAuthTime( KerberosTimeDecoder.decode( tag5 ) ); 117 break; 118 case 6: 119 DERGeneralizedTime tag6 = ( DERGeneralizedTime ) derObject; 120 modifier.setStartTime( KerberosTimeDecoder.decode( tag6 ) ); 121 break; 122 case 7: 123 DERGeneralizedTime tag7 = ( DERGeneralizedTime ) derObject; 124 modifier.setEndTime( KerberosTimeDecoder.decode( tag7 ) ); 125 break; 126 case 8: 127 DERGeneralizedTime tag8 = ( DERGeneralizedTime ) derObject; 128 modifier.setRenewTill( KerberosTimeDecoder.decode( tag8 ) ); 129 break; 130 case 9: 131 DERGeneralString tag9 = ( DERGeneralString ) derObject; 132 principalModifier.setRealm( tag9.getString() ); 133 break; 134 case 10: 135 DERSequence tag10 = ( DERSequence ) derObject; 136 principalModifier.setPrincipalName( PrincipalNameDecoder.decode( tag10 ) ); 137 break; 138 case 11: 139 DERSequence tag11 = ( DERSequence ) derObject; 140 modifier.setClientAddresses( HostAddressDecoder.decodeSequence( tag11 ) ); 141 break; 142 } 143 } 144 145 modifier.setServerPrincipal( principalModifier.getKerberosPrincipal() ); 146 147 return modifier; 148 } 149 }