/*
* 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.encoder;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import javax.security.auth.kerberos.KerberosPrincipal;
import org.apache.directory.server.kerberos.shared.messages.value.PrincipalName;
import org.apache.directory.shared.asn1.der.DERGeneralString;
import org.apache.directory.shared.asn1.der.DERInteger;
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: 587146 $, $Date: 2007-10-22 18:28:37 +0200 (Lun, 22 oct 2007) $
*/
public class PrincipalNameEncoder
{
private static final String COMPONENT_SEPARATOR = "/";
private static final String REALM_SEPARATOR = "@";
/**
* Encodes a {@link KerberosPrincipal} into a {@link DERSequence}.
*
* PrincipalName ::= SEQUENCE {
* name-type[0] INTEGER,
* name-string[1] SEQUENCE OF GeneralString
* }
*
* @param principal
* @return The {@link DERSequence}.
*/
public static DERSequence encode( KerberosPrincipal principal )
{
DERSequence vector = new DERSequence();
vector.add( new DERTaggedObject( 0, DERInteger.valueOf( principal.getNameType() ) ) );
vector.add( new DERTaggedObject( 1, encodeNameSequence( principal ) ) );
return vector;
}
/**
* Encodes a {@link PrincipalName} into a {@link DERSequence}.
*
* @param name
* @return The {@link DERSequence}.
*/
public static DERSequence encode( PrincipalName name )
{
DERSequence vector = new DERSequence();
vector.add( new DERTaggedObject( 0, DERInteger.valueOf( name.getNameType().getOrdinal() ) ) );
vector.add( new DERTaggedObject( 1, encodeNameSequence( name ) ) );
return vector;
}
private static DERSequence encodeNameSequence( KerberosPrincipal principal )
{
Iterator<String> it = getNameStrings( principal ).iterator();
DERSequence vector = new DERSequence();
while ( it.hasNext() )
{
vector.add( DERGeneralString.valueOf( it.next() ) );
}
return vector;
}
private static List<String> getNameStrings( KerberosPrincipal principal )
{
String nameComponent = principal.getName().split( REALM_SEPARATOR )[0];
String[] components = nameComponent.split( COMPONENT_SEPARATOR );
return Arrays.asList( components );
}
private static DERSequence encodeNameSequence( PrincipalName principalName )
{
DERSequence vector = new DERSequence();
for ( String name:principalName.getNames() )
{
vector.add( DERGeneralString.valueOf( name ) );
}
return vector;
}
}