bool InternalUserCertificateValidationCallback(object sender, X509Certificate x509Certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)
{
var certificateValidationHandler = _tcpOptions?.TlsOptions?.CertificateValidationHandler;
if (certificateValidationHandler != null)
{
var eventArgs = new MqttClientCertificateValidationEventArgs
{
Certificate = x509Certificate,
Chain = chain,
SslPolicyErrors = sslPolicyErrors,
ClientOptions = _tcpOptions
};
return(certificateValidationHandler(eventArgs));
}
return(sslPolicyErrors == SslPolicyErrors.None);
}
void SetupClientWebSocket(ClientWebSocket clientWebSocket)
{
if (_options.ProxyOptions != null)
{
clientWebSocket.Options.Proxy = CreateProxy();
}
if (_options.RequestHeaders != null)
{
foreach (var requestHeader in _options.RequestHeaders)
{
clientWebSocket.Options.SetRequestHeader(requestHeader.Key, requestHeader.Value);
}
}
if (_options.SubProtocols != null)
{
foreach (var subProtocol in _options.SubProtocols)
{
clientWebSocket.Options.AddSubProtocol(subProtocol);
}
}
if (_options.CookieContainer != null)
{
clientWebSocket.Options.Cookies = _options.CookieContainer;
}
if (_options.TlsOptions?.UseTls == true && _options.TlsOptions?.Certificates != null)
{
clientWebSocket.Options.ClientCertificates = new X509CertificateCollection();
foreach (var certificate in _options.TlsOptions.Certificates)
{
#if WINDOWS_UWP
clientWebSocket.Options.ClientCertificates.Add(new X509Certificate(certificate));
#else
clientWebSocket.Options.ClientCertificates.Add(certificate);
#endif
}
}
var certificateValidationHandler = _options.TlsOptions?.CertificateValidationHandler;
if (certificateValidationHandler != null)
{
#if NETSTANDARD1_3
throw new NotSupportedException("Remote certificate validation callback is not supported when using 'netstandard1.3'.");
#elif NETSTANDARD2_0
throw new NotSupportedException("Remote certificate validation callback is not supported when using 'netstandard2.0'.");
#elif WINDOWS_UWP
throw new NotSupportedException("Remote certificate validation callback is not supported when using 'uap10.0'.");
#elif NET452
throw new NotSupportedException("Remote certificate validation callback is not supported when using 'net452'.");
#elif NET461
throw new NotSupportedException("Remote certificate validation callback is not supported when using 'net461'.");
#else
clientWebSocket.Options.RemoteCertificateValidationCallback = (sender, certificate, chain, sslPolicyErrors) =>
{
// TODO: Find a way to add client options to same callback. Problem is that they have a different type.
var context = new MqttClientCertificateValidationEventArgs
{
Certificate = certificate,
Chain = chain,
SslPolicyErrors = sslPolicyErrors,
ClientOptions = _options
};
return(certificateValidationHandler(context));
};
#endif
}
}