| /* |
| * 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.preauthentication; |
| |
| |
| import java.util.List; |
| |
| import javax.security.auth.kerberos.KerberosKey; |
| |
| import org.apache.directory.server.kerberos.kdc.KdcConfiguration; |
| import org.apache.directory.server.kerberos.kdc.authentication.AuthenticationContext; |
| import org.apache.directory.server.kerberos.sam.SamException; |
| import org.apache.directory.server.kerberos.sam.SamSubsystem; |
| import org.apache.directory.server.kerberos.sam.TimestampChecker; |
| 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.KdcRequest; |
| import org.apache.directory.server.kerberos.shared.messages.value.EncryptionKey; |
| import org.apache.directory.server.kerberos.shared.messages.value.PreAuthenticationData; |
| import org.apache.directory.server.kerberos.shared.messages.value.types.KerberosErrorType; |
| import org.apache.directory.server.kerberos.shared.messages.value.types.PreAuthenticationDataType; |
| import org.apache.directory.server.kerberos.shared.store.PrincipalStoreEntry; |
| import org.apache.mina.common.IoSession; |
| 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 VerifySam extends VerifierBase |
| { |
| /** the log for this class */ |
| private static final Logger log = LoggerFactory.getLogger( VerifySam.class ); |
| |
| static |
| { |
| log.debug( "Initializing SAM subsystem." ); |
| SamSubsystem.getInstance().setIntegrityChecker( new TimestampChecker() ); |
| } |
| |
| |
| public void execute( NextCommand next, IoSession session, Object message ) throws Exception |
| { |
| log.debug( "Verifying using SAM subsystem." ); |
| AuthenticationContext authContext = ( AuthenticationContext ) session.getAttribute( getContextKey() ); |
| KdcRequest request = authContext.getRequest(); |
| KdcConfiguration config = authContext.getConfig(); |
| |
| PrincipalStoreEntry clientEntry = authContext.getClientEntry(); |
| String clientName = clientEntry.getPrincipal().getName(); |
| |
| EncryptionKey clientKey = null; |
| |
| if ( clientEntry.getSamType() != null ) |
| { |
| if ( log.isDebugEnabled() ) |
| { |
| log.debug( "Entry for client principal {} has a valid SAM type. Invoking SAM subsystem for pre-authentication.", clientName ); |
| } |
| |
| List<PreAuthenticationData> preAuthDatas = request.getPreAuthData(); |
| |
| if ( ( preAuthDatas == null ) || ( preAuthDatas.size() == 0 ) ) |
| { |
| throw new KerberosException( KerberosErrorType.KDC_ERR_PREAUTH_REQUIRED, preparePreAuthenticationError( config |
| .getEncryptionTypes() ) ); |
| } |
| |
| try |
| { |
| for ( PreAuthenticationData preAuthData:preAuthDatas ) |
| { |
| if ( preAuthData.getDataType().equals( PreAuthenticationDataType.PA_ENC_TIMESTAMP ) ) |
| { |
| KerberosKey samKey = SamSubsystem.getInstance().verify( clientEntry, |
| preAuthData.getDataValue() ); |
| clientKey = new EncryptionKey( EncryptionType.getTypeByOrdinal( samKey.getKeyType() ), samKey |
| .getEncoded() ); |
| } |
| } |
| } |
| catch ( SamException se ) |
| { |
| throw new KerberosException( KerberosErrorType.KRB_ERR_GENERIC, se ); |
| } |
| |
| authContext.setClientKey( clientKey ); |
| authContext.setPreAuthenticated( true ); |
| |
| if ( log.isDebugEnabled() ) |
| { |
| log.debug( "Pre-authentication using SAM subsystem successful for {}.", clientName ); |
| } |
| } |
| |
| next.execute( session, message ); |
| } |
| } |