c#忽略证书错误?

在向远程web服务请求web服务期间，我得到以下错误:

无法为SSL/TLS安全通道建立信任关系。——> System.Security.Authentication.AuthenticationException:根据验证程序，远端证书无效。

是否有办法忽略此错误并继续?

远程证书似乎没有签名。

我连接到的站点是www.czebox.cz——所以请随意访问该站点，并注意即使浏览器也会抛出安全异常。

当前回答

它失败的原因不是因为它没有签名，而是因为根证书不受您的客户端信任。与其关闭SSL验证，另一种方法是将根CA证书添加到应用程序信任的CA列表中。

这是根CA证书，你的应用程序目前不相信:

您可以使用解码和查看此证书

此证书解码器或另一个证书解码器

2010-04-20 19:07:32

其他回答

这适用于。net Core。调用Soap客户端:

client.ClientCredentials.ServiceCertificate.SslCertificateAuthentication =
                new X509ServiceCertificateAuthentication()
                {
                    CertificateValidationMode = X509CertificateValidationMode.None,
                    RevocationMode = X509RevocationMode.NoCheck
                };

2019-10-01 11:36:15

允许所有证书是非常强大的，但也可能是危险的。如果您希望只允许有效的证书加上某些特定的证书，可以这样做。

net核心:

using (var httpClientHandler = new HttpClientHandler())
{
    httpClientHandler.ServerCertificateCustomValidationCallback = (message, cert, chain, sslPolicyErrors) =>
    {
        if (sslPolicyErrors == SslPolicyErrors.None)
        {
            return true;   //Is valid
        }

        if (cert.GetCertHashString() == "99E92D8447AEF30483B1D7527812C9B7B3A915A7")
        {
            return true;
        }
        return false;
    };

    using (var httpClient = new HttpClient(httpClientHandler))
    {
        var httpResponse = httpClient.GetAsync("https://example.com").Result;
    }
}

net框架:

System.Net.ServicePointManager.ServerCertificateValidationCallback += delegate (
    object sender,
    X509Certificate cert,
    X509Chain chain,
    SslPolicyErrors sslPolicyErrors)
{
    if (sslPolicyErrors == SslPolicyErrors.None)
    {
        return true;   //Is valid
    }

    if (cert.GetCertHashString() == "99E92D8447AEF30483B1D7527812C9B7B3A915A7")
    {
        return true;
    }

    return false;
};

更新:

如何在Chrome中获取cert.GetCertHashString()值:

在地址栏中单击“安全”或“不安全”。

然后单击Certificate -> Details -> Thumbprint并复制该值。记得执行cert.GetCertHashString(). tolower()。

2017-05-23 16:37:54

它失败的原因不是因为它没有签名，而是因为根证书不受您的客户端信任。与其关闭SSL验证，另一种方法是将根CA证书添加到应用程序信任的CA列表中。

这是根CA证书，你的应用程序目前不相信:

您可以使用解码和查看此证书

此证书解码器或另一个证书解码器

2010-04-20 19:07:32

IgnoreBadCertificates方法:

//I use a method to ignore bad certs caused by misc errors
IgnoreBadCertificates();

// after the Ignore call i can do what ever i want...
HttpWebRequest request_data = System.Net.WebRequest.Create(urlquerystring) as HttpWebRequest;

/*
and below the Methods we are using...
*/

/// <summary>
/// Together with the AcceptAllCertifications method right
/// below this causes to bypass errors caused by SLL-Errors.
/// </summary>
public static void IgnoreBadCertificates()
{
    System.Net.ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(AcceptAllCertifications);
}  

/// <summary>
/// In Short: the Method solves the Problem of broken Certificates.
/// Sometime when requesting Data and the sending Webserverconnection
/// is based on a SSL Connection, an Error is caused by Servers whoes
/// Certificate(s) have Errors. Like when the Cert is out of date
/// and much more... So at this point when calling the method,
/// this behaviour is prevented
/// </summary>
/// <param name="sender"></param>
/// <param name="certification"></param>
/// <param name="chain"></param>
/// <param name="sslPolicyErrors"></param>
/// <returns>true</returns>
private static bool AcceptAllCertifications(object sender, System.Security.Cryptography.X509Certificates.X509Certificate certification, System.Security.Cryptography.X509Certificates.X509Chain chain, System.Net.Security.SslPolicyErrors sslPolicyErrors)
{
    return true;
}

2013-03-07 06:17:33

如果直接使用套接字并作为客户端进行身份验证，则Service Point Manager回调方法将不起作用。以下是对我有效的方法。请仅用于测试目的。

var activeStream = new SslStream(networkStream, false, (a, b, c, d) => { return true; });
await activeStream.AuthenticateAsClientAsync("computer.local");

这里的关键是在SSL流的构造函数中提供远程证书验证回调。

2016-05-05 04:32:05

c#忽略证书错误?

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