content: /*
   * 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 java.nio.ByteBuffer;
  
  import io.netty.buffer.ByteBuf;
  import org.apache.cassandra.service.QueryState;
  import org.apache.cassandra.transport.*;
  
  /**
   * A SASL token message sent from client to server. Some SASL
   * mechanisms and 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>()
      {
          public AuthResponse decode(ByteBuf body, ProtocolVersion version)
          {
              if (version == ProtocolVersion.V1)
                  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);
          }
  
          public void encode(AuthResponse response, ByteBuf dest, ProtocolVersion version)
          {
              CBUtil.writeValue(response.token, dest);
          }
  
          public int encodedSize(AuthResponse response, ProtocolVersion version)
          {
              return CBUtil.sizeOfValue(response.token);
          }
      };
  
      private final byte[] token;
  
      public AuthResponse(byte[] token)
      {
          super(Message.Type.AUTH_RESPONSE);
          assert token != null;
          this.token = token;
      }
  
      @Override
      protected Response execute(QueryState queryState, Dispatcher.RequestTime requestTime, boolean traceRequest)
      {
          return AuthUtil.handleLogin(connection, queryState, token, (negotiationComplete, challenge) ->
          {
              if (negotiationComplete)
              {
                  return new AuthSuccess(challenge);
              }
              else
              {
                  return new AuthChallenge(challenge);
              }
          });
      }
  }
  