文章来自：https://www.cnblogs.com/axzxs2001/p/10070562.html
关于https双向认证的知识可先行google，这时矸接代码。
为了双向认证，我们首先得准备两个crt证书，一个是client.crt，一个是server.crt，有时为了验证是否同一个根证书的验证，这两个证书可以共有一个根证书root.crt。
首先要生成这些证书，这里采用了自签证书方式：
证书生成工具可在这里下载(windows下生成)：
安装完成后在C:\OpenSSL-Win64\bin（最好不要改路径，否则生成证书时要改配置文件路径）下以管理员运行openssl.exe
一、创建根证书
openssl genrsa -des3 -out root.key
openssl req -new -key root.key -out root.csr
openssl x509 -req -days 3650 -sha1 -extensions v3_ca -signkey root.key -in root.csr -out root.crt
分别在客户端或服务端安装根证书，windows上安装证书时，证书存储可选择“受信任的根证书颁发机构”
二、创建服务端证书
openssl genrsa -des3 -out server.key 2048
openssl req -new -key server.key -out server.csr
openssl x509 -req -days 3650 -sha1 -extensions v3_req -CA root.crt -CAkey root.key -CAserial root.srl -CAcreateserial -in server.csr -out server.crt
openssl pkcs12 -export -in server.crt -inkey server.key -out server.pfx
三、创建客户端证书
openssl genrsa -des3 -out client.key 2048
openssl req -new -key client.key -out client.csr
openssl x509 -req -days 3650 -sha1 -extensions v3_req -CA root.crt -CAkey root.key -CAserial root.srl -CAcreateserial -in client.csr -out client.crt
openssl pkcs12 -export -in client.crt -inkey client.key -out client.pfx
接下来创建asp.net core web api项目，并把server.pfx添加到项目中，并设置属性为“始终复制”，接着修改Program.cs下的CreateWebHostBuilder方法就可以：
1 public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
2 WebHost.CreateDefaultBuilder(args)
3 .UseKestrel(options =>
4 {
5 options.Listen(IPAddress.Any, 80);
6 //启用https，443端口
7 options.Listen(IPAddress.Any, 443, listenOptions =>
8 {
9 var serverCertificate = new X509Certificate2("server.pfx", "ssssss");
10 var httpsConnectionAdapterOptions = new HttpsConnectionAdapterOptions()
11 {
12 ClientCertificateMode = ClientCertificateMode.AllowCertificate,
13 SslProtocols = System.Security.Authentication.SslProtocols.Tls12,
14 //用chain.Build验证客户端证书
15 ClientCertificateValidation = (cer, chain, error) =>
16 {
17 return chain.Build(cer);
18 },
19 ServerCertificate = signingCertificate
20 };
21 listenOptions.UseHttps(httpsConnectionAdapterOptions);
22 });
23 })
24 .UseStartup<Startup>();
为了区分http和https请求，在HomeController中写如下代码：
1 [HttpGet]
2 public ActionResult<IEnumerable<string>> Get()
3 {
4 var cer = HttpContext.Connection.ClientCertificate;
5 //证书为空，返回BadRequest
6 if (cer == null)
7 {
8 return BadRequest();
9 }
10 else
11 {
12 return new string[] { "value1", "value2" };
13 }
14 }
创建客户应用，.net core的控制台项目，把client.pfx添加到项目中，并设置属性为“始终复制”，然后代码如下
1 static void Main(string[] args)
2 {
3 Console.WriteLine("enter start");
4 while (true)
5 {
6 try
7 {
8 Console.WriteLine("1、Https 2、Http");
9 switch (Console.ReadLine())
10 {
11 case "1":
12 HttpsMethod();
13 break;
14 case "2":
15 HttpMethod();
16 break;
17 }
18 void HttpsMethod()
19 {
20 var handler = new HttpClientHandler();
21 handler.ClientCertificateOptions = ClientCertificateOption.Manual;
22 handler.SslProtocols = SslProtocols.Tls12 | SslProtocols.Tls | SslProtocols.None | SslProtocols.Tls11;
23 try
24 {
25 //加载客户端证书
26 var crt = new X509Certificate2(Directory.GetCurrentDirectory() + "/client.pfx", "cccccc");
27 handler.ClientCertificates.Add(crt);
28 }
29 catch (Exception e)
30 {
31 Console.WriteLine(e.Message);
32 }
33 //用chain.Build验证服务器证书
34 handler.ServerCertificateCustomValidationCallback = (message, cer, chain, errors) =>
35 {
36 return chain.Build(cer);
37 };
38 var client = new HttpClient(handler);
39 var url = "https://192.168.252.41 /api/values";
40 var response = client.GetAsync(url).Result;
41 Console.WriteLine(response.IsSuccessStatusCode);
42 var back = response.Content.ReadAsStringAsync().Result;
43 Console.WriteLine(back);
44 }
45 void HttpMethod()
46 {
47 var client = new HttpClient();
48 var url = "http://192.168.252.41/api/values";
49 var response = client.GetAsync(url).Result;
50 Console.WriteLine(response.IsSuccessStatusCode);
51 var back = response.Content.ReadAsStringAsync().Result;
52 Console.WriteLine(back);
53 }
54 }
55 catch (Exception exc)
56 {
57 Console.WriteLine(exc.InnerException?.InnerException?.Message);
58 }
59 }
60 }
原文：https://www.cnblogs.com/IWings/p/12819325.html