// TODO: Public when needed
internal bool TryGetChannelBinding(ref ChannelBinding?value)
{
if (!Request.IsHttps)
{
Log.ChannelBindingNeedsHttps(Logger);
return(false);
}
value = ClientCertLoader.GetChannelBindingFromTls(Server.RequestQueue, Request.UConnectionId, Logger);
Debug.Assert(value != null, "GetChannelBindingFromTls returned null even though OS supposedly supports Extended Protection");
Log.ChannelBindingRetrieved(Logger);
return(value != null);
}
private static unsafe void IOCompleted(ClientCertLoader asyncResult, uint errorCode, uint numBytes)
{
RequestContext requestContext = asyncResult.RequestContext;
try
{
if (errorCode == UnsafeNclNativeMethods.ErrorCodes.ERROR_MORE_DATA)
{
// There is a bug that has existed in http.sys since w2k3. Bytesreceived will only
// return the size of the initial cert structure. To get the full size,
// we need to add the certificate encoding size as well.
HttpApiTypes.HTTP_SSL_CLIENT_CERT_INFO *pClientCertInfo = asyncResult.RequestBlob;
asyncResult.Reset(numBytes + pClientCertInfo->CertEncodedSize);
uint bytesReceived = 0;
errorCode =
HttpApi.HttpReceiveClientCertificate(
requestContext.Server.RequestQueue.Handle,
requestContext.Request.UConnectionId,
(uint)HttpApiTypes.HTTP_FLAGS.NONE,
asyncResult._memoryBlob,
asyncResult._size,
&bytesReceived,
asyncResult._overlapped !);
if (errorCode == UnsafeNclNativeMethods.ErrorCodes.ERROR_IO_PENDING ||
(errorCode == UnsafeNclNativeMethods.ErrorCodes.ERROR_SUCCESS && !HttpSysListener.SkipIOCPCallbackOnSuccess))
{
return;
}
}
if (errorCode == UnsafeNclNativeMethods.ErrorCodes.ERROR_NOT_FOUND)
{
// The client did not send a cert.
asyncResult.Complete(0, null);
}
else if (errorCode != UnsafeNclNativeMethods.ErrorCodes.ERROR_SUCCESS)
{
asyncResult.Fail(new HttpSysException((int)errorCode));
}
else
{
HttpApiTypes.HTTP_SSL_CLIENT_CERT_INFO *pClientCertInfo = asyncResult._memoryBlob;
if (pClientCertInfo == null)
{
asyncResult.Complete(0, null);
}
else
{
if (pClientCertInfo->pCertEncoded != null)
{
try
{
byte[] certEncoded = new byte[pClientCertInfo->CertEncodedSize];
Marshal.Copy((IntPtr)pClientCertInfo->pCertEncoded, certEncoded, 0, certEncoded.Length);
asyncResult.Complete((int)pClientCertInfo->CertFlags, new X509Certificate2(certEncoded));
}
catch (CryptographicException exception)
{
// TODO: Log
asyncResult.Fail(exception);
}
catch (SecurityException exception)
{
// TODO: Log
asyncResult.Fail(exception);
}
}
}
}
}
catch (Exception exception)
{
asyncResult.Fail(exception);
}
}
