/// <summary>
/// Call back to override server certificate validation
/// </summary>
/// <param name="sender">The sender object.</param>
/// <param name="certificate">The remote certificate.</param>
/// <param name="chain">The certificate chain.</param>
/// <param name="sslPolicyErrors">Ssl policy errors</param>
/// <returns>Return true if valid certificate.</returns>
internal bool ValidateServerCertificate(object sender, X509Certificate certificate, X509Chain chain,
SslPolicyErrors sslPolicyErrors)
{
// if user callback is registered then do it
if (ServerCertificateValidationCallback != null)
{
var args = new CertificateValidationEventArgs
{
Certificate = certificate,
Chain = chain,
SslPolicyErrors = sslPolicyErrors
};
// why is the sender null?
ServerCertificateValidationCallback.InvokeAsync(this, args, exceptionFunc).Wait();
return(args.IsValid);
}
if (sslPolicyErrors == SslPolicyErrors.None)
{
return(true);
}
// By default
// do not allow this client to communicate with unauthenticated servers.
return(false);
}