| /* |
| * 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.util.Enumeration; |
| |
| import org.apache.directory.server.kerberos.shared.messages.Encodable; |
| import org.apache.directory.server.kerberos.shared.messages.value.AuthorizationData; |
| import org.apache.directory.server.kerberos.shared.messages.value.AuthorizationDataEntry; |
| import org.apache.directory.server.kerberos.shared.messages.value.types.AuthorizationType; |
| import org.apache.directory.shared.asn1.der.ASN1InputStream; |
| import org.apache.directory.shared.asn1.der.DEREncodable; |
| 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 AuthorizationDataDecoder implements Decoder, DecoderFactory |
| { |
| public Decoder getDecoder() |
| { |
| return new AuthorizationDataDecoder(); |
| } |
| |
| |
| public Encodable decode( byte[] encodedAuthData ) throws IOException |
| { |
| ASN1InputStream ais = new ASN1InputStream( encodedAuthData ); |
| |
| DERSequence sequence = ( DERSequence ) ais.readObject(); |
| |
| return decodeSequence( sequence ); |
| } |
| |
| |
| /** |
| * AuthorizationData ::= SEQUENCE OF SEQUENCE { |
| * ad-type[0] INTEGER, |
| * ad-data[1] OCTET STRING |
| * } |
| */ |
| protected static AuthorizationData decodeSequence( DERSequence sequence ) |
| { |
| AuthorizationData authData = new AuthorizationData(); |
| |
| for ( Enumeration<DEREncodable> e = sequence.getObjects(); e.hasMoreElements(); ) |
| { |
| DERSequence object = ( DERSequence ) e.nextElement(); |
| AuthorizationDataEntry entry = decodeAuthorizationEntry( object ); |
| authData.add( entry ); |
| } |
| |
| return authData; |
| } |
| |
| |
| protected static AuthorizationDataEntry decodeAuthorizationEntry( DERSequence sequence ) |
| { |
| AuthorizationType type = AuthorizationType.NULL; |
| byte[] data = null; |
| |
| for ( Enumeration<DEREncodable> 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; |
| type = AuthorizationType.getTypeByOrdinal( tag0.intValue() ); |
| break; |
| |
| case 1: |
| DEROctetString tag1 = ( DEROctetString ) derObject; |
| data = tag1.getOctets(); |
| break; |
| } |
| } |
| |
| return new AuthorizationDataEntry( type, data ); |
| } |
| } |