csharp 设置回调以验证FTP服务器对本地计算机的证书存储区传递给FTP客户端的证书。

Posted 2021-05-12

System.Net.ServicePointManager.ServerCertificateValidationCallback +=
    (sender, certificate, chain, sslPolicyErrors) =>
    {
        bool ok = false;

        X509Store store = new X509Store(StoreName.My, StoreLocation.LocalMachine);
        store.Open(OpenFlags.ReadOnly | OpenFlags.OpenExistingOnly);

        if (sslPolicyErrors == SslPolicyErrors.None && store.Certificates.Contains(certificate))
        {
            if (Convert.ToDateTime(certificate.GetEffectiveDateString()) <= DateTime.Now 
                && DateTime.Now < Convert.ToDateTime(certificate.GetExpirationDateString())) 
            {
                ok = true;
            }
        }

        store.Close();

        return ok;
    };