C# Dropbox HTTPS公钥

我的软件使用HTTPS连接到Dropbox，以便检索一些敏感数据

我用以下代码固定Dropbox公钥

ServicePointManager.ServerCertificateValidationCallback = PinPublicKey;
private static readonly List<string> AllowedPublicKeys = new List<string>
        {
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

            "3082010A0282010100D169E87071F5C91C8E552563EE5A9519297425DDFCB620482F3D0D61FB85B834766EC93D87BB9EAFF99785BDCE118A85D52A144B7C8C601CCF020714FD34B99793635498917F6F6E2F90ECBF0E6E37E80456054BC00B18D6A06E71F3E713B8A15B6A329924A2C644A488CF602DAFC050FB9FE1B49169609B16AB05C0ACAA470C081908C68937A74778FAAE9D0A192B3BF50FB1FAE47159E604687071A1E823EEBD24A2FE245D4E7AF656E8EE7C7E8DDFF306A0D16FFFAA650562B6DC9A18392604AA6886B2C1CFB9F7AD4893DA817770773D929ED92C779C3D4F608D8D637CA4294A9064F206EF8E6BF7FC85BBB9104F8F57D10BC4990C5F1B7C9F68D0F02E3D0203010001"
        }; //dropbox.com and dl.dropboxusercontent.com public keys 2017-10-16

        public static bool PinPublicKey(object sender, X509Certificate certificate, X509Chain chain,
            SslPolicyErrors sslPolicyErrors)
        {
            if (null == certificate)
                return false;

            String pk = certificate.GetPublicKeyString();
            if (AllowedPublicKeys.Any(s => s.Equals(pk, StringComparison.InvariantCultureIgnoreCase)))
                return true;

            return false;
        }

ServicePointManager.ServerCertificateValidationCallback=PinPublicKey；
私有静态只读列表AllowedPublicKeys=新列表
{
“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“，
“3082010 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 105D4E7AF656E8EE7C7E8DDFF306A0D16FFFAA650562B6DC9A18392604AA6886B2C1CFB9F7AD4893DA817770773D929ED92C779C3D4F608D637CA4294A9064F206EF8E6BF7FC85BBB9104F8F57D10BC4990C5F1B7C9F68D02E3D00200100001“
}; //dropbox.com和dl.dropboxusercontent.com公钥2017-10-16
public static bool PinPublicKey（对象发送方、X509证书证书、X509链、，
SslPolicyErrors SslPolicyErrors）
{
if（null==证书）
返回false；
字符串pk=certificate.GetPublicKeyString（）；
if（AllowedPublicKeys.Any（s=>s.Equals（pk，StringComparison.InvariantCultureIgnoreCase）））
返回true；
返回false；
}

虽然这对我在欧洲的工作非常好，但印度的一位客户表示无法建立HTTPS连接

我在想，Dropbox可能在世界各地为其CDN使用了不同的公钥

我能做些什么？有没有办法在不知道的情况下锁定所有公钥