public override byte[] GetByteMessage()
{
List <byte> messageArray = new List <byte>();
messageArray.AddRange(Mhdr.ToArray());
messageArray.AddRange(AppEUI.ToArray());
messageArray.AddRange(DevEUI.ToArray());
messageArray.AddRange(DevNonce.ToArray());
if (!Mic.Span.IsEmpty)
{
messageArray.AddRange(Mic.ToArray());
}
return(messageArray.ToArray());
}
private byte[] PerformMic(string appKey)
{
IMac mac = MacUtilities.GetMac("AESCMAC");
KeyParameter key = new KeyParameter(ConversionHelper.StringToByteArray(appKey));
mac.Init(key);
var algoinput = Mhdr.ToArray().Concat(AppEUI.ToArray()).Concat(DevEUI.ToArray()).Concat(DevNonce.ToArray()).ToArray();
byte[] result = new byte[19];
mac.BlockUpdate(algoinput, 0, algoinput.Length);
result = MacUtilities.DoFinal(mac);
var resStr = BitConverter.ToString(result);
return(result.Take(4).ToArray());
}
