Question

我无法获得使用我的SslStream项目的客户端证书。无论我做什么，我都无法让它实际使用客户端证书，尽管所有证书都是有效且值得信赖的，并且我已经为我自己生成的证书导入了CA证书，但它没有工作。我必须遗漏一些东西，但我已经过了几十次，审查了文档，示例和谷歌搜索的时间，我只是无法让它工作。我做错了什么？

客户：

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net.Security;
using System.Net.Sockets;
using System.Reflection;
using System.Security.Cryptography.X509Certificates;
using System.Text;

namespace SslClient
{
    class SslClientProgram
    {
        static void Main(string[] args)
        {
            TcpClient client = new TcpClient("localhost", 443);

            SslStream stream = new SslStream(client.GetStream(), false, VerifyServerCertificate, null);

            Assembly assembly = System.Reflection.Assembly.GetExecutingAssembly();
            string location = assembly.Location;
            int pos = location.LastIndexOf('\\');
            location = location.Substring(0, pos);
            X509Certificate2 certificate = new X509Certificate2(location + "\\my.client.certificate.pfx", "password");

            stream.AuthenticateAsClient("my.host.name", new X509Certificate2Collection(certificate), System.Security.Authentication.SslProtocols.Tls, false);

            StreamReader reader = new StreamReader(stream);
            StreamWriter writer = new StreamWriter(stream);

            while (true)
            {
                string line = System.Console.ReadLine();
                writer.WriteLine(line);
                writer.Flush();
                if (line == "close") break;
                line = reader.ReadLine();
                System.Console.WriteLine("Received: {0}", line);
            }

            stream.Close();
        }

        private static bool VerifyServerCertificate(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)
        {
            return true;
        }
    }
}

服务器：

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net.Security;
using System.Net.Sockets;
using System.Reflection;
using System.Security.Cryptography.X509Certificates;
using System.Text;

namespace SslServer
{
    class SslServerProgram
    {
        static void Main(string[] args)
        {
            TcpListener server = new TcpListener(System.Net.IPAddress.Loopback, 443);

            server.Start();

            TcpClient client = server.AcceptTcpClient();

            SslStream stream = new SslStream(client.GetStream(), false, VerifyClientCertificate, null);

            Assembly assembly = System.Reflection.Assembly.GetExecutingAssembly();
            string location = assembly.Location;
            int pos = location.LastIndexOf('\\');
            location = location.Substring(0, pos);
            X509Certificate2 certificate = new X509Certificate2(location + "\\my.server.certificate.pfx", "password");

            stream.AuthenticateAsServer(certificate, false, System.Security.Authentication.SslProtocols.Tls, false);

            if (stream.RemoteCertificate != null)
            {
                System.Console.WriteLine(stream.RemoteCertificate.Subject);
            }
            else
            {
                System.Console.WriteLine("No client certificate.");
            }

            StreamReader reader = new StreamReader(stream);
            StreamWriter writer = new StreamWriter(stream);

            bool clientClose = false;
            while (!System.Console.KeyAvailable)
            {
                System.Console.WriteLine("Waiting for data...");
                string line = reader.ReadLine();
                System.Console.WriteLine("Received: {0}", line);

                if (line == "close")
                {
                    clientClose = true;
                    break;
                }

                writer.WriteLine(line);
                writer.Flush();
            }

            if (!clientClose) System.Console.ReadKey();

            stream.Close();
            server.Stop();
        }

        private static bool VerifyClientCertificate(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)
        {
            return true;
        }
    }
}

无论我尝试什么，服务器总是说“没有客户端证书。”

Answer 1

事实证明，AuthenticateAsServer是关键 - 更具体地说，是第二个参数。

如果clientCertificateRequired是false，它将完全忽略客户端证书，即使客户端证书指定了一个证书，但如果它是true，它将允许它们，但不会如果未指定客户端证书，则抛出异常。

愚蠢的我 - 我认为clientCertificateRequired设置为true意味着它将实际需要，因为.Net文档将其描述为：

“布尔值，指定客户端是否必须提供用于身份验证的证书。”* （强调我的）

我的期望是，如果它是true，而我没有发送客户端证书，那么它就会失败。对于微软来说，这是一个明显不完全准确的文档。

更新：clientCertificateRequired参数的latest documentation包含短语“请注意，这只是一个请求 - 如果未提供证书，服务器仍会接受连接请求。”

带有客户端证书的.Net SslStream

1 个答案: