| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| */ |
| package org.apache.directory.server.kerberos.shared.io.decoder; |
| |
| |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| import java.util.Enumeration; |
| |
| import org.apache.directory.server.kerberos.shared.messages.KerberosError; |
| import org.apache.directory.server.kerberos.shared.messages.value.KerberosPrincipalModifier; |
| import org.apache.directory.server.kerberos.shared.messages.value.types.KerberosErrorType; |
| import org.apache.directory.shared.asn1.der.ASN1InputStream; |
| import org.apache.directory.shared.asn1.der.DERApplicationSpecific; |
| import org.apache.directory.shared.asn1.der.DEREncodable; |
| import org.apache.directory.shared.asn1.der.DERGeneralString; |
| import org.apache.directory.shared.asn1.der.DERGeneralizedTime; |
| import org.apache.directory.shared.asn1.der.DERInteger; |
| import org.apache.directory.shared.asn1.der.DEROctetString; |
| import org.apache.directory.shared.asn1.der.DERSequence; |
| import org.apache.directory.shared.asn1.der.DERTaggedObject; |
| |
| |
| /** |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| * @version $Rev$, $Date$ |
| */ |
| public class ErrorMessageDecoder |
| { |
| /** |
| * Decodes a {@link ByteBuffer} into an {@link KerberosError}. |
| * |
| * KRB-ERROR ::= [APPLICATION 30] SEQUENCE |
| * |
| * @param in |
| * @return The {@link KerberosError}. |
| * @throws IOException |
| */ |
| public KerberosError decode( ByteBuffer in ) throws IOException |
| { |
| ASN1InputStream ais = new ASN1InputStream( in ); |
| |
| DERApplicationSpecific app = ( DERApplicationSpecific ) ais.readObject(); |
| |
| DERSequence errorMessage = ( DERSequence ) app.getObject(); |
| |
| return decodeErrorMessageSequence( errorMessage ); |
| } |
| |
| |
| /* |
| KRB-ERROR ::= [APPLICATION 30] SEQUENCE { |
| pvno [0] INTEGER (5), |
| msg-type [1] INTEGER (30), |
| ctime [2] KerberosTime OPTIONAL, |
| cusec [3] Microseconds OPTIONAL, |
| stime [4] KerberosTime, |
| susec [5] Microseconds, |
| error-code [6] Int32, |
| crealm [7] Realm OPTIONAL, |
| cname [8] PrincipalName OPTIONAL, |
| realm [9] Realm -- service realm --, |
| sname [10] PrincipalName -- service name --, |
| e-text [11] KerberosString OPTIONAL, |
| e-data [12] OCTET STRING OPTIONAL |
| } |
| */ |
| private KerberosError decodeErrorMessageSequence( DERSequence sequence ) |
| { |
| KerberosError kerberosError = new KerberosError(); |
| KerberosPrincipalModifier clientModifier = new KerberosPrincipalModifier(); |
| KerberosPrincipalModifier serverModifier = new KerberosPrincipalModifier(); |
| |
| for ( Enumeration e = sequence.getObjects(); e.hasMoreElements(); ) |
| { |
| DERTaggedObject object = ( DERTaggedObject ) e.nextElement(); |
| int tag = object.getTagNo(); |
| DEREncodable derObject = object.getObject(); |
| |
| switch ( tag ) |
| { |
| case 0: |
| // DERInteger tag0 = ( DERInteger ) derObject; |
| // int pvno = tag0.intValue(); |
| break; |
| case 1: |
| // DERInteger tag1 = ( DERInteger ) derObject; |
| // msgType = MessageType.getTypeByOrdinal( tag1.intValue() ); |
| break; |
| case 2: |
| DERGeneralizedTime tag2 = ( DERGeneralizedTime ) derObject; |
| kerberosError.setClientTime( KerberosTimeDecoder.decode( tag2 ) ); |
| break; |
| case 3: |
| DERInteger tag3 = ( DERInteger ) derObject; |
| kerberosError.setClientMicroSecond( tag3.intValue() ); |
| break; |
| case 4: |
| DERGeneralizedTime tag4 = ( DERGeneralizedTime ) derObject; |
| kerberosError.setServerTime( KerberosTimeDecoder.decode( tag4 ) ); |
| break; |
| case 5: |
| DERInteger tag5 = ( DERInteger ) derObject; |
| kerberosError.setServerMicroseconds( tag5.intValue() ); |
| break; |
| case 6: |
| DERInteger tag6 = ( DERInteger ) derObject; |
| kerberosError.setErrorCode( KerberosErrorType.getTypeByOrdinal( tag6.intValue() ) ); |
| break; |
| case 7: |
| DERGeneralString tag7 = ( DERGeneralString ) derObject; |
| clientModifier.setRealm( tag7.getString() ); |
| break; |
| case 8: |
| DERSequence tag8 = ( DERSequence ) derObject; |
| clientModifier.setPrincipalName( PrincipalNameDecoder.decode( tag8 ) ); |
| break; |
| case 9: |
| DERGeneralString tag9 = ( DERGeneralString ) derObject; |
| serverModifier.setRealm( tag9.getString() ); |
| break; |
| case 10: |
| DERSequence tag10 = ( DERSequence ) derObject; |
| serverModifier.setPrincipalName( PrincipalNameDecoder.decode( tag10 ) ); |
| break; |
| case 11: |
| DERGeneralString tag11 = ( DERGeneralString ) derObject; |
| kerberosError.setExplanatoryText( tag11.getString() ); |
| break; |
| case 12: |
| DEROctetString tag12 = ( DEROctetString ) derObject; |
| kerberosError.setExplanatoryData( tag12.getOctets() ); |
| break; |
| } |
| } |
| |
| kerberosError.setClientPrincipal( clientModifier.getKerberosPrincipal() ); |
| kerberosError.setServerPrincipal( serverModifier.getKerberosPrincipal() ); |
| |
| return kerberosError; |
| } |
| } |