add checksum to viking demod

[proxmark3-svn] / common / iso14443crc.h

//-----------------------------------------------------------------------------
// This code is licensed to you under the terms of the GNU GPL, version 2 or,
// at your option, any later version. See the LICENSE.txt file for the text of
// the license.
//-----------------------------------------------------------------------------
// ISO14443 CRC calculation code.
//-----------------------------------------------------------------------------

#ifndef __ISO14443CRC_H
#define __ISO14443CRC_H
#include "common.h"

//-----------------------------------------------------------------------------
// Routines to compute the CRCs (two different flavours, just for confusion)
// required for ISO 14443, swiped directly from the spec.
//-----------------------------------------------------------------------------
#define	CRC_14443_A	0x6363	/* ITU-V.41 */
#define	CRC_14443_B	0xFFFF  /* ISO/IEC 13239 (formerly ISO/IEC 3309) */
#define CRC_ICLASS	0xE012  /* ICLASS PRERFIX */

void ComputeCrc14443(int CrcType,
                     const unsigned char *Data, int Length,
                     unsigned char *TransmitFirst,
                     unsigned char *TransmitSecond);
int CheckCrc14443(int CrcType, const unsigned char *Data, int Length);

#endif