BS2ErrorCode computeCRC(BS2SmartCardData smartCard, out UInt16 hdrCRC, out UInt16 cardCRC)
{
BS2ErrorCode result = BS2ErrorCode.BS_SDK_SUCCESS;
IntPtr smartCardObj = Marshal.AllocHGlobal(Marshal.SizeOf(smartCard));
int cardTypeOffset = (int)Marshal.OffsetOf(typeof(BS2SmartCardHeader), "cardType");
int cardCRCOffset = (int)Marshal.OffsetOf(typeof(BS2SmartCardHeader), "cardCRC");
IntPtr cardDataObj = smartCardObj + cardTypeOffset;
Marshal.StructureToPtr(smartCard, smartCardObj, false);
cardCRC = 0xFFFF;
hdrCRC = 0xFFFF;
result = (BS2ErrorCode)API.BS2_ComputeCRC16CCITT(cardDataObj, (UInt32)(Marshal.SizeOf(typeof(BS2SmartCardData)) - cardTypeOffset), ref cardCRC);
if (result == BS2ErrorCode.BS_SDK_SUCCESS)
{
Marshal.WriteInt16(smartCardObj, cardCRCOffset, (Int16)cardCRC);
IntPtr cardCrcObj = smartCardObj + cardCRCOffset;
result = (BS2ErrorCode)API.BS2_ComputeCRC16CCITT(cardCrcObj, (UInt32)(Marshal.SizeOf(typeof(BS2SmartCardHeader)) - cardCRCOffset), ref hdrCRC);
}
Marshal.FreeHGlobal(smartCardObj);
return(result);
}