| /* |
| * 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.kdc; |
| |
| |
| import java.util.List; |
| |
| import org.apache.directory.server.kerberos.shared.crypto.encryption.EncryptionType; |
| import org.apache.directory.server.kerberos.shared.exceptions.KerberosException; |
| import org.apache.directory.server.kerberos.shared.messages.value.types.KerberosErrorType; |
| import org.apache.mina.common.IoSession; |
| import org.apache.mina.handler.chain.IoHandlerCommand; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| |
| /** |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| * @version $Rev$, $Date$ |
| */ |
| public class SelectEncryptionType implements IoHandlerCommand |
| { |
| /** The log for this class. */ |
| private static final Logger log = LoggerFactory.getLogger( SelectEncryptionType.class ); |
| |
| private String contextKey = "context"; |
| |
| |
| public void execute( NextCommand next, IoSession session, Object message ) throws Exception |
| { |
| KdcContext kdcContext = ( KdcContext ) session.getAttribute( getContextKey() ); |
| KdcConfiguration config = kdcContext.getConfig(); |
| |
| List<EncryptionType> requestedTypes = kdcContext.getRequest().getEType(); |
| |
| EncryptionType bestType = getBestEncryptionType( requestedTypes, config.getEncryptionTypes() ); |
| |
| log.debug( "Session will use encryption type {}.", bestType ); |
| |
| if ( bestType == null ) |
| { |
| throw new KerberosException( KerberosErrorType.KDC_ERR_ETYPE_NOSUPP ); |
| } |
| |
| kdcContext.setEncryptionType( bestType ); |
| |
| next.execute( session, message ); |
| } |
| |
| |
| protected EncryptionType getBestEncryptionType( List<EncryptionType> requestedTypes, EncryptionType[] configuredTypes ) |
| { |
| for ( EncryptionType eType:requestedTypes ) |
| { |
| for ( int jj = 0; jj < configuredTypes.length; jj++ ) |
| { |
| if ( eType == configuredTypes[jj] ) |
| { |
| return configuredTypes[jj]; |
| } |
| } |
| } |
| |
| return null; |
| } |
| |
| |
| protected String getContextKey() |
| { |
| return ( this.contextKey ); |
| } |
| } |