private async Task SendRequestAsync(FidoHidMsgType msgType, byte[] data = null)
{
if (data == null)
{
data = new byte[0];
}
var size = data.Length;
var payloadData = data.Take(HidReportSize - 7).ToArray();
var payloadBuilder = new ByteArrayBuilder();
payloadBuilder.Append(_channelId);
payloadBuilder.Append((byte)msgType);
payloadBuilder.Append((byte)(size >> 8 & 0xff));
payloadBuilder.Append((byte)(size & 0xff));
payloadBuilder.Append(payloadData);
payloadBuilder.AppendZerosTill(HidReportSize);
var report = _hidDevice.CreateReport();
report.Data = payloadBuilder.GetBytes();
if (!await _hidDevice.WriteReportAsync(report, HidTimeoutMs).ConfigureAwait(false))
{
throw new FidoException(FidoError.InterruptedIO, "Error writing to token");
}
var remainingData = data.Skip(HidReportSize - 7).ToArray();
var seq = 0;
while (remainingData.Length > 0)
{
payloadData = remainingData.Take(HidReportSize - 5).ToArray();
payloadBuilder.Clear();
payloadBuilder.Append(_channelId);
payloadBuilder.Append((byte)(0x7f & seq));
payloadBuilder.Append(payloadData);
payloadBuilder.AppendZerosTill(HidReportSize);
report = _hidDevice.CreateReport();
report.Data = payloadBuilder.GetBytes();
if (!await _hidDevice.WriteReportAsync(report, HidTimeoutMs).ConfigureAwait(false))
{
throw new FidoException(FidoError.InterruptedIO, "Error writing to token");
}
remainingData = remainingData.Skip(HidReportSize - 5).ToArray();
seq++;
}
}