Как использовать HTTPS для сетевой службы на C# через TcpClient, TcpListener?

 using System; 
using System.IO; 
using System.Net; 
using System.Net.Sockets; 
using System.Net.Security; 
using System.Security.Cryptography.X509Certificates; 
using System.Text; 
using System.Threading.Tasks; 
 
class HttpsServer 
{ 
    public static async Task StartServer(string certPath, string certPassword) 
    { 
        var certificate = new X509Certificate2(certPath, certPassword); 
        var listener = new TcpListener(IPAddress.Any, 4433); 
        listener.Start(); 
        Console.WriteLine("HTTPS сервер запущен на порту 4433..."); 
 
        while (true) 
        { 
            TcpClient client = await listener.AcceptTcpClientAsync(); 
            _ = HandleClient(client, certificate); // fire-and-forget 
        } 
    } 
 
    private static async Task HandleClient(TcpClient client, X509Certificate2 certificate) 
    { 
        using var stream = client.GetStream(); 
        using var sslStream = new SslStream(stream, false); 
        try 
        { 
            await sslStream.AuthenticateAsServerAsync(certificate, clientCertificateRequired: false, checkCertificateRevocation: false); 
 
            using var reader = new StreamReader(sslStream, Encoding.UTF8); 
            using var writer = new StreamWriter(sslStream, Encoding.UTF8) { AutoFlush = true }; 
 
            string requestLine = await reader.ReadLineAsync(); 
            Console.WriteLine("Получен запрос: " + requestLine); 
 
            // Простой HTTP-ответ 
            string response = "HTTP/1.1 200 OK\r\nContent-Type: text/plain\r\nContent-Length: 5\r\n\r\nHello"; 
            await writer.WriteAsync(response); 
        } 
        catch (Exception ex) 
        { 
            Console.WriteLine("Ошибка: " + ex.Message); 
        } 
        finally 
        { 
            client.Close(); 
        } 
    } 
} 
 

 using System; 
using System.IO; 
using System.Net.Sockets; 
using System.Net.Security; 
using System.Security.Cryptography.X509Certificates; 
using System.Text; 
using System.Threading.Tasks; 
 
class HttpsClient 
{ 
    public static async Task ConnectToServer(string host, int port) 
    { 
        var client = new TcpClient(); 
        await client.ConnectAsync(host, port); 
 
        using var stream = client.GetStream(); 
        using var sslStream = new SslStream(stream, false, new RemoteCertificateValidationCallback(ValidateServerCertificate), null); 
 
        await sslStream.AuthenticateAsClientAsync(host); 
 
        using var writer = new StreamWriter(sslStream, Encoding.UTF8) { AutoFlush = true }; 
        using var reader = new StreamReader(sslStream, Encoding.UTF8); 
 
        await writer.WriteLineAsync("GET / HTTP/1.1"); 
        await writer.WriteLineAsync($"Host: {host}"); 
        await writer.WriteLineAsync("Connection: close"); 
        await writer.WriteLineAsync(); // пустая строка — конец заголовков 
 
        string line; 
        while ((line = await reader.ReadLineAsync()) != null) 
        { 
            Console.WriteLine(line); 
        } 
    } 
 
    private static bool ValidateServerCertificate(object sender, X509Certificate cert, X509Chain chain, SslPolicyErrors errors) 
    { 
        // В продакшне нужно строго проверять ошибки 
        return true; // всегда "доверять" для тестов 
    } 
}