Question

我知道在StackOverflow和其他资源上有很多有关此错误的信息，但它在我的开发机上运行正常，现在在客户环境Windows Server 2012上运行。这是我的代码。

public sealed class Certificates
{
    private static bool subscribed = false;

    private static Certificates instance = null;

    private static readonly object padlock = new object();

    private Certificates() { }

    public static Certificates Instance
    {
        get
        {
            lock (padlock)
            {
                if (instance == null)
                    instance = new Certificates();
                return instance;
            }
        }
    }

    public void GetCertificatesAutomatically()
    {
        if (!subscribed)
        {
            ServicePointManager.ServerCertificateValidationCallback +=
                RemoteCertificateValidationCallback;
            //new RemoteCertificateValidationCallback((sender, certificate, chain, policyErrors) => { return true; });
            ServicePointManager.Expect100Continue = true;
            ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3 |
                                                   SecurityProtocolType.Tls |
                                                   SecurityProtocolType.Tls11 |
                                                   SecurityProtocolType.Tls12;
            ServicePointManager.MaxServicePointIdleTime = 0;
            subscribed = true;
        }
    }

    private static bool RemoteCertificateValidationCallback(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)
    {
        // Return true if the server certificate is ok
        if (sslPolicyErrors == SslPolicyErrors.None)
            return true;

        bool acceptCertificate = true;
        StringBuilder msg = new StringBuilder("The server could not be validate for the following reason():");

        // The server did not present a certificate
        if ((sslPolicyErrors & SslPolicyErrors.RemoteCertificateNotAvailable) == SslPolicyErrors.RemoteCertificateNotAvailable)
        {
            msg.AppendLine("    - The server did not present a certificate.");
            acceptCertificate = false;
        }
        else
        {
            // The certificate does not math the server name
            if ((sslPolicyErrors & SslPolicyErrors.RemoteCertificateNameMismatch) == SslPolicyErrors.RemoteCertificateNameMismatch)
            {
                msg.AppendLine("    - The certificate name does not match the authenticated name.");
                acceptCertificate = false;
            }

            // There is som other problem with certificate
            if ((sslPolicyErrors & SslPolicyErrors.RemoteCertificateChainErrors) == SslPolicyErrors.RemoteCertificateChainErrors)
            {
                foreach (X509ChainStatus item in chain.ChainStatus)
                {
                    if (item.Status != X509ChainStatusFlags.RevocationStatusUnknown &&
                        item.Status != X509ChainStatusFlags.OfflineRevocation)
                    {
                        SLICLog.Error($"    - {item.StatusInformation}.");
                        break;
                    }
                    if (item.Status != X509ChainStatusFlags.NoError)
                    {
                        msg.AppendLine($"    - {item.StatusInformation}.");
                        acceptCertificate = false;
                    }
                }
            }
        }

        // if validation failed, write log
        if (!acceptCertificate)
        {
            acceptCertificate = true;
        }

        return acceptCertificate;
    }
}

然后我使用下一个代码

 Host = new Uri(credential.Domain);

 if (Host.Scheme.Contains("https"))
     Certificates.Instance.GetCertificatesAutomatically();
using (HttpWebResponse httpWebResponse = httpRequest.GetResponse() as HttpWebResponse)
            using (var response = httpWebResponse.GetResponseStream())
            using (var sr = new StreamReader(response))
            {
                token = JsonConvert.DeserializeObject<SessionInternal>(sr.ReadToEnd());
                if (token != null)
                {
                    Authorized = true;
                    token.Exprired = DateTime.Now.AddSeconds(Convert.ToDouble(token.expires_in));
                }
            }

问题在于，在环境计算机上，ServerCertificateValidationCallback被忽略了（我从仅为调试而添加的日志中知道这一点。）

在一个网站上，我读到Microsoft不允许它忽略服务器计算机上的自签名证书，但不确定。相同的代码在Windows10上可用，在Windows Server 2012上不可用，API服务器的设置也相同，我的意思是主机URL和凭据相同。 .NET Framework 4.7.2

已更新：

我不知道为什么，但是另一台具有自签名证书的服务器可以工作，我的意思是我在环境服务器上运行代码以与另一台API服务器（这是另一种API）一起工作，并调用了ServerCertificateValidationCallback委托。我试图通过Wireshark研究网络，这是客户端/服务器之间连接不良的一部分这是与另一台服务器的正常连接我很困惑，但是代码相同，API服务器的IP只有不同，行为也不同

Answer 1

我遇到了同样的问题-Windows 10也可以正常运行，Server 2012 R2不能正常运行。我已经尝试了从.Net 4.6到4.7.2到4.8的所有内容，并且在Win 10中可以正常运行，但在Win Server 2012 R2中则不能。从客户端角度来看（即Win Server 2012 R2运行失败的客户端软件）。我正在访问的网站具有有效的GoDaddy TLS 1.2 Only证书。

无法为SSL / TLS安全通道建立信任关系-Windows Server 2012 R2

1 个答案: