Reply To: Mifare Classic MAD1 CRC8 Generation

[Jan Matik]

Hi, it's some time ago, but maybe it will help somebody anyway. I use this code to calculate MAD CRC:

uint8_t CalculateCRC8_MAD(uint8_t *in_pData, uint8_t in_nDataLength)

{

	if (in_pData == nullptr)

		return 0;

	

	if (in_nDataLength == 0)

		return 0;

	

	// init vector defined in MAD appnote is 0xE3. This didn't work, but bit-swapped value 0xC7 works

	boost::crc_optimal crc8;



	uint8_t	*pStart = in_pData;

	uint8_t *pEnd	= in_pData + in_nDataLength;



	crc8 = std::for_each(pStart, pEnd, crc8);



	return crc8.checksum();

}

Regards
Jan

---

+ 0  |  - 0