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最终.NET 5.0发布，根据TLS 1.3 支持也将从 5.0 版开始添加到 .NET 中，Microsoft 计划随着 .NET 5.0 的到来将 TLS 1.3 支持添加到 .NET 框架中 tls1.3 工作在一个.NET 5.0 项目。

所以我创建了一个测试“控制台应用程序（.NET Core）”项目。 在此处输入图像描述 然后我把这个项目定位到 .net5.0 在此处输入图像描述 添加测试代码

using System;
using System.Net.Security;
using System.Net.Sockets;
using System.Security.Authentication;
using System.Security.Cryptography;
using System.Security.Cryptography.X509Certificates;
using System.Text;
using System.Threading.Tasks;

namespace TestSsl {
    class Program {
        static void Main(string[] args) {
            object locker = new object();
            SslProtocols protocol = SslProtocols.Tls13;
            Console.WriteLine($"testing SslProtocols.{protocol}");
            int port = 1999;
            RemoteCertificateValidationCallback certificateValidationCallback = (sender, certificate, chain, sslPolicyErrors) => {
                return (true);
            };
            X509Certificate2 serverCert = new X509Certificate2("server.pfx", "testpass123");
            X509Certificate2 clientCert = new X509Certificate2("client.pfx", "testpass123");
            TcpListener server = TcpListener.Create(port);
            server.Server.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.KeepAlive, true);
            server.Server.NoDelay = true;
            server.Server.SetSocketOption(SocketOptionLevel.IPv6, SocketOptionName.IPv6Only, false);
            server.Start();
            Task taskServer = Task.Run(() => {
                TcpClient romoteClient = server.AcceptTcpClient();
                Task.Run(() => {
                    using(romoteClient) {
                        using(SslStream sslStreamRomoteClient = new SslStream(romoteClient.GetStream(), false, certificateValidationCallback)) {
                            try {
                                sslStreamRomoteClient.AuthenticateAsServer(serverCert, true, protocol, true);
                                byte[] buf = new byte[1000];
                                int len = sslStreamRomoteClient.Read(buf, 0, buf.Length);
                                string receive = Encoding.UTF8.GetString(buf, 0, len);
                                Console.WriteLine($"server receive:{receive}");
                                sslStreamRomoteClient.Write(Encoding.UTF8.GetBytes("Ok"));
                                Console.WriteLine($"server send:Ok");
                            } catch(Exception ex) {
                                lock(locker) {
                                    Console.WriteLine("======Server Exception==========================");
                                    Console.WriteLine(ex);
                                }
                            }
                        }
                    }
                }).Wait();
            });
            Task taskClient = Task.Run(() => {
                try {
                    using(TcpClient client = new TcpClient()) {
                        client.Connect("127.0.0.1", port);
                        using(SslStream sslStreamClient = new SslStream(client.GetStream(), false, certificateValidationCallback)) {
                            sslStreamClient.AuthenticateAsClient("127.0.0.1", new X509CertificateCollection() { clientCert }, protocol, true);
                            string send = "hi, i am testing tls";
                            sslStreamClient.Write(Encoding.UTF8.GetBytes(send));
                            Console.WriteLine($"client send:{send}");
                            byte[] buf = new byte[1000];
                            int len = sslStreamClient.Read(buf);
                            string receive = Encoding.UTF8.GetString(buf, 0, len);
                            Console.WriteLine($"client receive:{receive}");
                        }
                    }
                } catch(Exception ex) {
                    lock(locker) {
                        Console.WriteLine("======Client Exception==========================");
                        Console.WriteLine(ex);
                    }
                }
            });
            Task.WaitAll(taskClient, taskServer);
        }
    }
}

调试结果 在此处输入图像描述

我的VS2019版 在此处输入图像描述

根据如何在 Windows 10 中启用 TLS 1.3，我之前已经在 regedit 中启用了 TLS 1.3 在此处输入图像描述

在此处输入图像描述

我的windows版本

在此处输入图像描述

我是如何创建这些 pfx 证书的

CRTPASS="testpass123"

CRTNAME="server"
SUBJECT="/C=DE/ST=test/L=test/O=test GmbH/OU=test/CN=test[${CRTNAME}]/emailAddress=test@test.de"
rm -f ${CRTNAME}.key ${CRTNAME}.csr ${CRTNAME}.crt ${CRTNAME}.pfx
openssl genpkey -algorithm RSA -pkeyopt rsa_keygen_bits:4096 -pkeyopt rsa_keygen_pubexp:65537 -aes-256-cbc -des3 -pass pass:${CRTPASS} -out ${CRTNAME}.key
openssl req -new -sha384 -subj "${SUBJECT}" -key ${CRTNAME}.key -out ${CRTNAME}.csr 
openssl x509 -req -days 3650 -signkey ${CRTNAME}.key -in ${CRTNAME}.csr -out ${CRTNAME}.crt
openssl pkcs12 -export -out ${CRTNAME}.pfx -inkey ${CRTNAME}.key -in ${CRTNAME}.crt

openssl x509 -text -in ${CRTNAME}.crt 

CRTNAME="client"
SUBJECT="/C=DE/ST=Westerstede/L=Westerstede/O=test GmbH/OU=test/CN=test[${CRTNAME}]/emailAddress=test@test.de"
rm -f ${CRTNAME}.key ${CRTNAME}.csr ${CRTNAME}.crt ${CRTNAME}.pfx
openssl genpkey -algorithm RSA -pkeyopt rsa_keygen_bits:4096 -pkeyopt rsa_keygen_pubexp:65537 -aes-256-cbc -des3 -pass pass:${CRTPASS} -out ${CRTNAME}.key
openssl req -new -sha384 -subj "${SUBJECT}" -key ${CRTNAME}.key -out ${CRTNAME}.csr 
openssl x509 -req -days 3650 -signkey ${CRTNAME}.key -in ${CRTNAME}.csr -out ${CRTNAME}.crt
openssl pkcs12 -export -out ${CRTNAME}.pfx -inkey ${CRTNAME}.key -in ${CRTNAME}.crt

openssl x509 -text -in ${CRTNAME}.crt

在我在针对“.NET Core 3.1”的“控制台应用程序（.NET Core）”中测试类似代码之前，它发生异常“无法确定帧大小或收到损坏的帧”

我想知道：

1、.NET 5.0 是否已经支持 tls1.3？

2，这个异常是否可能是因为我的 pfx 证书问题？

3、windows 10是否支持tls1.3？如果没有，什么时候？我找不到官方计划。

4、目前情况下如何在UWP项目中使用tls1.3？</p>

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