private static byte[] PrepareData(CardInitRequest req)
{
List <byte> buffer = new List <byte>();
buffer.AddRange(Encoding.ASCII.GetBytes("RFT")); // 3
buffer.AddRange(req.SN); // 4
buffer.AddRange(Encoding.ASCII.GetBytes(req.UserId)); // 6
buffer.AddRange(BitConverter.GetBytes(req.Sector)); // 2
buffer.Add((byte)0x00); // 1
logger.Debug("Prepare Key data : " + BitConverter.ToString(buffer.ToArray()));
return(buffer.ToArray());
}
/// <summary>
/// Key : 'RFT'(3) + sn(4) + userId(6) + sectorType + '00'
/// </summary>
public static CardInitResponse ComputeKey(CardInitRequest req)
{
byte[] factor = PrepareData(req);
CardInitResponse response = new CardInitResponse()
{
Sector = req.Sector,
ReadableKey = BitConverter.ToString(ComputeReadableKey(factor)),
WritableKey = BitConverter.ToString(ComputeWritableKey(factor))
};
return(response);
}