/*
* 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.cassandra.transport.messages;
import org.apache.cassandra.auth.AuthenticatedUser;
import org.apache.cassandra.auth.ISaslAwareAuthenticator.SaslAuthenticator;
import org.apache.cassandra.exceptions.AuthenticationException;
import org.apache.cassandra.service.QueryState;
import org.apache.cassandra.transport.CBUtil;
import org.apache.cassandra.transport.Message;
import org.apache.cassandra.transport.ProtocolException;
import org.apache.cassandra.transport.ServerConnection;
import org.jboss.netty.buffer.ChannelBuffer;
import java.nio.ByteBuffer;
/**
* A SASL token message sent from client to server. Some SASL
* mechanisms & clients may send an initial token before
* receiving a challenge from the server.
*/
public class AuthResponse extends Message.Request
{
public static final Message.Codec<AuthResponse> codec = new Message.Codec<AuthResponse>()
{
@Override
public AuthResponse decode(ChannelBuffer body, int version)
{
if (version == 1)
throw new ProtocolException("SASL Authentication is not supported in version 1 of the protocol");
ByteBuffer b = CBUtil.readValue(body);
byte[] token = new byte[b.remaining()];
b.get(token);
return new AuthResponse(token);
}
@Override
public ChannelBuffer encode(AuthResponse response, int version)
{
return CBUtil.valueToCB(response.token);
}
};
private byte[] token;
public AuthResponse(byte[] token)
{
super(Message.Type.AUTH_RESPONSE);
this.token = token;
}
@Override
public ChannelBuffer encode()
{
return codec.encode(this, getVersion());
}
@Override
public Response execute(QueryState queryState)
{
try
{
SaslAuthenticator authenticator = ((ServerConnection) connection).getAuthenticator();
byte[] challenge = authenticator.evaluateResponse(token == null ? new byte[0] : token);
if (authenticator.isComplete())
{
AuthenticatedUser user = authenticator.getAuthenticatedUser();
queryState.getClientState().login(user);
// authentication is complete, send a ready message to the client
return new AuthSuccess(challenge);
}
else
{
return new AuthChallenge(challenge);
}
}
catch (AuthenticationException e)
{
return ErrorMessage.fromException(e);
}
}
}