/// <summary>
/// The Dropbox certificate validation callback.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="certificate">The certificate.</param>
/// <param name="chain">The chain.</param>
/// <param name="sslpolicyerrors">The sslpolicyerrors.</param>
/// <returns></returns>
private static bool DropboxCertificateValidationCallback(object sender, X509Certificate certificate, X509Chain chain,
SslPolicyErrors sslpolicyerrors)
{
X509ChainElement root = chain.ChainElements[chain.ChainElements.Count - 1];
string publicKey = root.Certificate.GetPublicKeyString();
return(DropboxCertHelper.IsKnownRootCertPublicKey(publicKey));
}
private void InitializeCertPinning()
{
ServicePointManager.ServerCertificateValidationCallback = (sender, certificate, chain, sslPolicyErrors) =>
{
var root = chain.ChainElements[chain.ChainElements.Count - 1];
var publicKey = root.Certificate.GetPublicKeyString();
return(DropboxCertHelper.IsKnownRootCertPublicKey(publicKey));
};
}
/// <summary>
/// The Dropbox certificate validation callback.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="certificate">The certificate.</param>
/// <param name="chain">The chain.</param>
/// <param name="sslpolicyerrors">The sslpolicyerrors.</param>
/// <returns></returns>
private static bool DropboxCertificateValidationCallback(object sender, X509Certificate certificate, X509Chain chain,
SslPolicyErrors sslpolicyerrors)
{
// http://babbacom.com/?p=300 - fix security hole
if (sslpolicyerrors != SslPolicyErrors.None || chain == null)
{
return(false);
}
int n = chain.ChainElements.Count;
if (n == 0)
{
return(false);
}
X509ChainElement root = chain.ChainElements[n - 1];
string publicKey = root.Certificate.GetPublicKeyString();
return(DropboxCertHelper.IsKnownRootCertPublicKey(publicKey));
}
