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.util.Enumeration; 024 025 import org.apache.directory.server.kerberos.shared.messages.value.PrincipalName; 026 import org.apache.directory.shared.asn1.der.DEREncodable; 027 import org.apache.directory.shared.asn1.der.DERGeneralString; 028 import org.apache.directory.shared.asn1.der.DERInteger; 029 import org.apache.directory.shared.asn1.der.DERSequence; 030 import org.apache.directory.shared.asn1.der.DERTaggedObject; 031 032 033 /** 034 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 035 * @version $Rev: 587146 $, $Date: 2007-10-22 18:28:37 +0200 (Mon, 22 Oct 2007) $ 036 */ 037 public class PrincipalNameDecoder 038 { 039 /** 040 * Decodes a {@link DERSequence} into a {@link PrincipalName}. 041 * 042 * PrincipalName ::= SEQUENCE { 043 * name-type[0] INTEGER, 044 * name-string[1] SEQUENCE OF GeneralString 045 * } 046 * 047 * @param sequence 048 * @return The {@link PrincipalName}. 049 */ 050 public static PrincipalName decode( DERSequence sequence ) 051 { 052 PrincipalName principalName = new PrincipalName(); 053 054 for ( Enumeration<DEREncodable> e = sequence.getObjects(); e.hasMoreElements(); ) 055 { 056 DERTaggedObject object = ( DERTaggedObject ) e.nextElement(); 057 int tag = object.getTagNo(); 058 DEREncodable derObject = object.getObject(); 059 060 switch ( tag ) 061 { 062 case 0: 063 DERInteger nameType = ( DERInteger ) derObject; 064 principalName.setNameType( nameType.intValue() ); 065 break; 066 067 case 1: 068 DERSequence nameString = ( DERSequence ) derObject; 069 decodeNameString( nameString, principalName ); 070 break; 071 } 072 } 073 074 return principalName; 075 } 076 077 078 private static void decodeNameString( DERSequence sequence, PrincipalName principalName ) 079 { 080 for ( Enumeration<DEREncodable> e = sequence.getObjects(); e.hasMoreElements(); ) 081 { 082 DERGeneralString object = ( DERGeneralString ) e.nextElement(); 083 principalName.addName( object.getString() ); 084 } 085 } 086 }