/*
* 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.ftpserver.command;
import java.io.IOException;
import java.security.GeneralSecurityException;
import org.apache.ftpserver.ftplet.FtpException;
import org.apache.ftpserver.ftplet.FtpReply;
import org.apache.ftpserver.ftplet.FtpRequest;
import org.apache.ftpserver.interfaces.FtpIoSession;
import org.apache.ftpserver.interfaces.FtpServerContext;
import org.apache.ftpserver.ssl.ClientAuth;
import org.apache.ftpserver.ssl.SslConfiguration;
import org.apache.ftpserver.util.FtpReplyUtil;
import org.apache.mina.filter.ssl.SslFilter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* This server supports explicit SSL support.
*/
public
class AUTH extends AbstractCommand {
private final Logger LOG = LoggerFactory.getLogger(AUTH.class);
/**
* Execute command
*/
public void execute(final FtpIoSession session,
final FtpServerContext context,
final FtpRequest request) throws IOException, FtpException {
// reset state variables
session.resetState();
// argument check
if(!request.hasArgument()) {
session.write(FtpReplyUtil.translate(session, request, context, FtpReply.REPLY_501_SYNTAX_ERROR_IN_PARAMETERS_OR_ARGUMENTS, "AUTH", null));
return;
}
// check SSL configuration
if(session.getListener().getSslConfiguration() == null) {
session.write(FtpReplyUtil.translate(session, request, context, 431, "AUTH", null));
return;
}
// check parameter
String authType = request.getArgument().toUpperCase();
if(authType.equals("SSL")) {
try {
secureSession(session, "SSL");
session.write(FtpReplyUtil.translate(session, request, context, 234, "AUTH.SSL", null));
} catch(FtpException ex) {
throw ex;
} catch(Exception ex) {
LOG.warn("AUTH.execute()", ex);
throw new FtpException("AUTH.execute()", ex);
}
}
else if(authType.equals("TLS")) {
try {
secureSession(session, "TLS");
session.write(FtpReplyUtil.translate(session, request, context, 234, "AUTH.TLS", null));
} catch(FtpException ex) {
throw ex;
} catch(Exception ex) {
LOG.warn("AUTH.execute()", ex);
throw new FtpException("AUTH.execute()", ex);
}
}
else {
session.write(FtpReplyUtil.translate(session, request, context, FtpReply.REPLY_502_COMMAND_NOT_IMPLEMENTED, "AUTH", null));
}
}
private void secureSession(final FtpIoSession session, final String type) throws GeneralSecurityException, FtpException {
SslConfiguration ssl = session.getListener().getSslConfiguration();
if(ssl != null) {
session.setAttribute(SslFilter.DISABLE_ENCRYPTION_ONCE);
SslFilter sslFilter = new SslFilter( ssl.getSSLContext() );
if(ssl.getClientAuth() == ClientAuth.NEED) {
sslFilter.setNeedClientAuth(true);
} else if(ssl.getClientAuth() == ClientAuth.WANT) {
sslFilter.setWantClientAuth(true);
}
if(ssl.getEnabledCipherSuites() != null) {
sslFilter.setEnabledCipherSuites(ssl.getEnabledCipherSuites());
}
session.getFilterChain().addFirst("sslSessionFilter", sslFilter);
} else {
throw new FtpException("Socket factory SSL not configured");
}
}
}