求个C# SSL socket的客户端和 服务端代码

Question

求个C# SSL socket的客户端和 服务端代码，得能连的通的

Answer 1

参考GPT：下面是一个简单的 C# SSL socket 客户端和服务端的示例代码，可以用于测试 SSL socket 的连接。需要注意的是，此示例代码中使用了自签名证书，如果您要在生产环境中使用 SSL socket，请使用受信任的证书。

服务端代码：

using System;
using System.IO;
using System.Net;
using System.Net.Security;
using System.Net.Sockets;
using System.Security.Authentication;
using System.Security.Cryptography.X509Certificates;
using System.Text;

class Server
{
    static void Main(string[] args)
    {
        TcpListener listener = new TcpListener(IPAddress.Any, 8888);
        listener.Start();
        Console.WriteLine("Server started, waiting for connections...");

        while (true)
        {
            TcpClient client = listener.AcceptTcpClient();
            Console.WriteLine("Client connected: " + client.Client.RemoteEndPoint.ToString());

            SslStream stream = new SslStream(client.GetStream(), false);
            X509Certificate2 cert = new X509Certificate2("server.pfx", "password");
            stream.AuthenticateAsServer(cert, false, SslProtocols.Tls, true);

            StreamReader reader = new StreamReader(stream, Encoding.UTF8);
            StreamWriter writer = new StreamWriter(stream, Encoding.UTF8) { AutoFlush = true };

            writer.WriteLine("Welcome to SSL server!");
            string message = reader.ReadLine();
            Console.WriteLine("Received message from client: " + message);

            writer.WriteLine("Server received your message: " + message);
            stream.Close();
            client.Close();
            Console.WriteLine("Client disconnected.");
        }
    }
}

客户端代码：

using System;
using System.IO;
using System.Net.Security;
using System.Net.Sockets;
using System.Security.Authentication;
using System.Security.Cryptography.X509Certificates;
using System.Text;

class Client
{
    static void Main(string[] args)
    {
        TcpClient client = new TcpClient("localhost", 8888);
        Console.WriteLine("Connected to server: " + client.Client.RemoteEndPoint.ToString());

        SslStream stream = new SslStream(client.GetStream(), false, new RemoteCertificateValidationCallback(ValidateServerCertificate));
        X509Certificate2 cert = new X509Certificate2("client.pfx", "password");
        stream.AuthenticateAsClient("localhost", new X509Certificate2Collection(cert), SslProtocols.Tls, true);

        StreamReader reader = new StreamReader(stream, Encoding.UTF8);
        StreamWriter writer = new StreamWriter(stream, Encoding.UTF8) { AutoFlush = true };

        string message = reader.ReadLine();
Console.WriteLine("Received message from server: " + message);

    writer.WriteLine("Hello from SSL client!");
    Console.WriteLine("Sent message to server: Hello from SSL client!");

    stream.Close();
    client.Close();
    Console.WriteLine("Disconnected from server.");
}

private static bool ValidateServerCertificate(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)
{
    // In this example, we trust any certificate the server presents.
    // In production code, you should verify that the certificate is issued to the correct server and issued by a trusted certificate authority.
    return true;
}
}

在此示例中，客户端连接到本地主机的端口 8888，并尝试建立 SSL 连接。客户端使用自签名的证书进行身份验证，并向服务器发送消息。服务器使用相同的自签名证书进行身份验证，并返回接收到的消息。客户端在控制台上输出服务器发送的消息，并发送一条消息作为响应。最后，客户端关闭 SSL 连接和 TcpClient 连接。

在生产环境中，您应该使用由受信任的证书机构颁发的证书，以确保安全的 SSL 通信。