001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.security;
019
020import javax.security.sasl.SaslException;
021import org.apache.yetus.audience.InterfaceAudience;
022
023import org.apache.hbase.thirdparty.io.netty.buffer.ByteBuf;
024import org.apache.hbase.thirdparty.io.netty.buffer.Unpooled;
025import org.apache.hbase.thirdparty.io.netty.channel.ChannelHandlerContext;
026import org.apache.hbase.thirdparty.io.netty.channel.SimpleChannelInboundHandler;
027
028/**
029 * Unwrap sasl messages. Should be placed after a
030 * io.netty.handler.codec.LengthFieldBasedFrameDecoder
031 */
032@InterfaceAudience.Private
033public class SaslUnwrapHandler extends SimpleChannelInboundHandler<ByteBuf> {
034
035  public interface Unwrapper {
036    byte[] unwrap(byte[] incoming, int offset, int len) throws SaslException;
037  }
038
039  private final Unwrapper unwrapper;
040
041  public SaslUnwrapHandler(Unwrapper unwrapper) {
042    this.unwrapper = unwrapper;
043  }
044
045  @Override
046  protected void channelRead0(ChannelHandlerContext ctx, ByteBuf msg) throws Exception {
047    byte[] bytes = new byte[msg.readableBytes()];
048    msg.readBytes(bytes);
049    ctx.fireChannelRead(Unpooled.wrappedBuffer(unwrapper.unwrap(bytes, 0, bytes.length)));
050  }
051}