/// <summary>
/// Call back to override server certificate validation
/// </summary>
/// <param name="sender"></param>
/// <param name="certificate"></param>
/// <param name="chain"></param>
/// <param name="sslPolicyErrors"></param>
/// <returns></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
};
Delegate[] invocationList = ServerCertificateValidationCallback.GetInvocationList();
Task[] handlerTasks = new Task[invocationList.Length];
for (int i = 0; i < invocationList.Length; i++)
{
handlerTasks[i] = ((Func <object, CertificateValidationEventArgs, Task>)invocationList[i])(null, args);
}
Task.WhenAll(handlerTasks).Wait();
return(args.IsValid);
}
if (sslPolicyErrors == SslPolicyErrors.None)
{
return(true);
}
//By default
//do not allow this client to communicate with unauthenticated servers.
return(false);
}
