SSLEngine unwrap（）javax.crypto.BadPaddingException：坏记录MAC

Question

    public void read(SelectionKey key,ByteBuffer readBuffer) throws IOException, BadPaddingException {

    SocketChannel socketChannel = (SocketChannel) key.channel();

    ByteBuffer clientSSLData = ByteBuffer.allocate(getPacketBufferSize());
    System.out.println("Reading data. PacketBufferSize: "+(getPacketBufferSize()));
    int length = socketChannel.read(clientSSLData);

    System.out.println("read "+length+" bytes");
    if (length == -1){
        System.out.println("Length is -1 which means nothing was read from the channel  ");
        socketChannel.close();
        return;
    }
    clientSSLData.flip();
    readBuffer.clear();
    SSLEngineResult res = sslEngine.unwrap(clientSSLData, readBuffer);
    System.out.println(res.toString());
}

编辑：异常是...

javax.net.ssl.SSLException：在sun.security.ssl.alerts.getsslException（未知源）在sun.security.ssl.sslengineimpl.fatal（未知源）在sun.security.ssl.sslengineimpl.readRecord（未知源）在sun.security.ssl.sslengineimpl.readRecord（未知源）在sun.security.ssl.sslengineimpl.unwrap（未知源）在在ssl.engine.impl.channelhandler.run（channelhandler.java:69)在java.lang.thread.run（未知源）由：javax.crypto.BadPaddingException：sun.security.ssl.engininputrecord.decrypt（未知源）的坏记录MAC.

Answer 1

你做错了。当您需要获取数据时，您应该：

1. 从应用程序接收器缓冲区获取。
2. 如果为空，请尝试unwrap().
3. 如果这导致缓冲区下溢，请读取通道。

同样，当您需要放置数据时，您应该：