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.encoder; 021 022 023 import java.util.Arrays; 024 import java.util.Iterator; 025 import java.util.List; 026 027 import javax.security.auth.kerberos.KerberosPrincipal; 028 029 import org.apache.directory.server.kerberos.shared.messages.value.PrincipalName; 030 import org.apache.directory.shared.asn1.der.DERGeneralString; 031 import org.apache.directory.shared.asn1.der.DERInteger; 032 import org.apache.directory.shared.asn1.der.DERSequence; 033 import org.apache.directory.shared.asn1.der.DERTaggedObject; 034 035 036 /** 037 * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> 038 * @version $Rev: 587146 $, $Date: 2007-10-22 18:28:37 +0200 (Mon, 22 Oct 2007) $ 039 */ 040 public class PrincipalNameEncoder 041 { 042 private static final String COMPONENT_SEPARATOR = "/"; 043 private static final String REALM_SEPARATOR = "@"; 044 045 046 /** 047 * Encodes a {@link KerberosPrincipal} into a {@link DERSequence}. 048 * 049 * PrincipalName ::= SEQUENCE { 050 * name-type[0] INTEGER, 051 * name-string[1] SEQUENCE OF GeneralString 052 * } 053 * 054 * @param principal 055 * @return The {@link DERSequence}. 056 */ 057 public static DERSequence encode( KerberosPrincipal principal ) 058 { 059 DERSequence vector = new DERSequence(); 060 061 vector.add( new DERTaggedObject( 0, DERInteger.valueOf( principal.getNameType() ) ) ); 062 vector.add( new DERTaggedObject( 1, encodeNameSequence( principal ) ) ); 063 064 return vector; 065 } 066 067 068 /** 069 * Encodes a {@link PrincipalName} into a {@link DERSequence}. 070 * 071 * @param name 072 * @return The {@link DERSequence}. 073 */ 074 public static DERSequence encode( PrincipalName name ) 075 { 076 DERSequence vector = new DERSequence(); 077 078 vector.add( new DERTaggedObject( 0, DERInteger.valueOf( name.getNameType().getOrdinal() ) ) ); 079 vector.add( new DERTaggedObject( 1, encodeNameSequence( name ) ) ); 080 081 return vector; 082 } 083 084 085 private static DERSequence encodeNameSequence( KerberosPrincipal principal ) 086 { 087 Iterator<String> it = getNameStrings( principal ).iterator(); 088 089 DERSequence vector = new DERSequence(); 090 091 while ( it.hasNext() ) 092 { 093 vector.add( DERGeneralString.valueOf( it.next() ) ); 094 } 095 096 return vector; 097 } 098 099 100 private static List<String> getNameStrings( KerberosPrincipal principal ) 101 { 102 String nameComponent = principal.getName().split( REALM_SEPARATOR )[0]; 103 String[] components = nameComponent.split( COMPONENT_SEPARATOR ); 104 return Arrays.asList( components ); 105 } 106 107 108 private static DERSequence encodeNameSequence( PrincipalName principalName ) 109 { 110 DERSequence vector = new DERSequence(); 111 112 for ( String name:principalName.getNames() ) 113 { 114 vector.add( DERGeneralString.valueOf( name ) ); 115 } 116 117 return vector; 118 } 119 }