/*
* 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.thrift.transport;
import java.util.Map;
import javax.security.auth.callback.CallbackHandler;
import javax.security.sasl.Sasl;
import javax.security.sasl.SaslClient;
import javax.security.sasl.SaslException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Wraps another Thrift <code>TTransport</code>, but performs SASL client
* negotiation on the call to <code>open()</code>. This class will wrap ensuing
* communication over it, if a SASL QOP is negotiated with the other party.
*/
public class TSaslClientTransport extends TSaslTransport {
private static final Logger LOGGER = LoggerFactory.getLogger(TSaslClientTransport.class);
/**
* The name of the mechanism this client supports.
*/
private final String mechanism;
/**
* Uses the given <code>SaslClient</code>.
*
* @param saslClient
* The <code>SaslClient</code> to use for the subsequent SASL
* negotiation.
* @param transport
* Transport underlying this one.
*/
public TSaslClientTransport(SaslClient saslClient, TTransport transport) {
super(saslClient, transport);
mechanism = saslClient.getMechanismName();
}
/**
* Creates a <code>SaslClient</code> using the given SASL-specific parameters.
* See the Java documentation for <code>Sasl.createSaslClient</code> for the
* details of the parameters.
*
* @param transport
* The underlying Thrift transport.
* @throws SaslException
*/
public TSaslClientTransport(String mechanism, String authorizationId, String protocol,
String serverName, Map<String, String> props, CallbackHandler cbh, TTransport transport)
throws SaslException {
super(Sasl.createSaslClient(new String[] { mechanism }, authorizationId, protocol, serverName,
props, cbh), transport);
this.mechanism = mechanism;
}
@Override
protected SaslRole getRole() {
return SaslRole.CLIENT;
}
/**
* Performs the client side of the initial portion of the Thrift SASL
* protocol. Generates and sends the initial response to the server, including
* which mechanism this client wants to use.
*/
@Override
protected void handleSaslStartMessage() throws TTransportException, SaslException {
SaslClient saslClient = getSaslClient();
byte[] initialResponse = new byte[0];
if (saslClient.hasInitialResponse())
initialResponse = saslClient.evaluateChallenge(initialResponse);
LOGGER.debug("Sending mechanism name {} and initial response of length {}", mechanism,
initialResponse.length);
byte[] mechanismBytes = mechanism.getBytes();
sendSaslMessage(NegotiationStatus.START,
mechanismBytes);
// Send initial response
sendSaslMessage(saslClient.isComplete() ? NegotiationStatus.COMPLETE : NegotiationStatus.OK,
initialResponse);
underlyingTransport.flush();
}
}