java - 安全连接Java Socket

Question

我有一个关于我用 java 创建的桌面应用程序的问题，它位于登录部分。事实证明，我不知道如何进行安全登录，我通过套接字进行，但问题是它是一个公开的应用程序，所以我不知道如何在不使用SSL的情况下使用SSL套接字每个人的密码，这将是可破解的，你能帮我吗？我目前有此代码，可以在消息中的简单示例中查看它。

对于服务器

//static ServerSocket variable
    private static ServerSocket server;
    //socket server port on which it will listen
    private static int port = 9876;

    public static void main(String args[]) throws IOException, ClassNotFoundException{
        //create the socket server object
        server = new ServerSocket(port);
        //keep listens indefinitely until receives 'exit' call or program terminates
        while(true){
            System.out.println("Waiting for the client request");
            //creating socket and waiting for client connection
            Socket socket = server.accept();
            //read from socket to ObjectInputStream object
            ObjectInputStream ois = new ObjectInputStream(socket.getInputStream());
            //convert ObjectInputStream object to String
            String message = (String) ois.readObject();
            System.out.println("Message Received: " + message);
            //create ObjectOutputStream object
            ObjectOutputStream oos = new ObjectOutputStream(socket.getOutputStream());
            //write object to Socket
            oos.writeObject("Hi Client "+message);
            //close resources
            ois.close();
            oos.close();
            socket.close();
            //terminate the server if client sends exit request
            if(message.equalsIgnoreCase("exit")) break;
        }
        System.out.println("Shutting down Socket server!!");
        //close the ServerSocket object
        server.close();
    }

}

对于客户

public static void main(String[] args) throws UnknownHostException, IOException, ClassNotFoundException, InterruptedException{
        //get the localhost IP address, if server is running on some other IP, you need to use that
        InetAddress host = InetAddress.getLocalHost();
        Socket socket = null;
        ObjectOutputStream oos = null;
        ObjectInputStream ois = null;
        for(int i=0; i<5;i++){
            //establish socket connection to server
            socket = new Socket(host.getHostName(), 9876);
            //write to socket using ObjectOutputStream
            oos = new ObjectOutputStream(socket.getOutputStream());
            System.out.println("Sending request to Socket Server");
            if(i==4)oos.writeObject("exit");
            else oos.writeObject(""+i);
            //read the server response message
            ois = new ObjectInputStream(socket.getInputStream());
            String message = (String) ois.readObject();
            System.out.println("Message: " + message);
            //close resources
            ois.close();
            oos.close();
            Thread.sleep(100);
        }
    }
}

Answer 1

如果您想以这种方式处理 500 个客户端 - 忘记套接字并手动实现 TLS 处理。选择 Spring Boot 或类似的东西。 Make the server expose a REST endpoint to the world 。 Secure it with Spring Security to get the authentication you want 。 Then deploy your own certificates to protect the communication channel 。到底use the Springs RestTemplate so the client connects in a secure manner .

像上面那样编写临时代码可以让您快速进入网络通信，但会让下一步变得更加困难。