package org.apache.qpid.transport.network.security.sasl;
/*
*
* 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.
*
*/
import java.nio.ByteBuffer;
import java.util.concurrent.atomic.AtomicBoolean;
import javax.security.sasl.SaslClient;
import javax.security.sasl.SaslException;
import org.apache.qpid.transport.Sender;
import org.apache.qpid.transport.SenderException;
import org.apache.qpid.transport.util.Logger;
public class SASLSender extends SASLEncryptor implements Sender<ByteBuffer> {
protected Sender<ByteBuffer> delegate;
private byte[] appData;
private final AtomicBoolean closed = new AtomicBoolean(false);
private static final Logger log = Logger.get(SASLSender.class);
public SASLSender(Sender<ByteBuffer> delegate)
{
this.delegate = delegate;
log.debug("SASL Sender enabled");
}
@Override
public void close()
{
if (!closed.getAndSet(true))
{
delegate.close();
if (isSecurityLayerEstablished())
{
try
{
saslClient.dispose();
}
catch (SaslException e)
{
throw new SenderException("Error closing SASL Sender",e);
}
}
}
}
@Override
public void flush()
{
delegate.flush();
}
@Override
public void send(ByteBuffer buf)
{
if (closed.get())
{
throw new SenderException("SSL Sender is closed");
}
if (isSecurityLayerEstablished())
{
while (buf.hasRemaining())
{
int length = Math.min(buf.remaining(),sendBuffSize);
log.debug("sendBuffSize %s", sendBuffSize);
log.debug("buf.remaining() %s", buf.remaining());
buf.get(appData, 0, length);
try
{
byte[] out = saslClient.wrap(appData, 0, length);
log.debug("out.length %s", out.length);
delegate.send(ByteBuffer.wrap(out));
}
catch (SaslException e)
{
log.error("Exception while encrypting data.",e);
throw new SenderException("SASL Sender, Error occurred while encrypting data",e);
}
}
}
else
{
delegate.send(buf);
}
}
@Override
public void setIdleTimeout(int i)
{
delegate.setIdleTimeout(i);
}
public void securityLayerEstablished()
{
appData = new byte[sendBuffSize];
log.debug("SASL Security Layer Established");
}
}