common/iso14443crc.h

   1 //-----------------------------------------------------------------------------
   2 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
   3 // at your option, any later version. See the LICENSE.txt file for the text of
   4 // the license.
   5 //-----------------------------------------------------------------------------
   6 // ISO14443 CRC calculation code.
   7 //-----------------------------------------------------------------------------
   8
   9 #ifndef __ISO14443CRC_H
  10 #define __ISO14443CRC_H
  11 #include "common.h"
  12
  13 //-----------------------------------------------------------------------------
  14 // Routines to compute the CRCs (two different flavours, just for confusion)
  15 // required for ISO 14443, swiped directly from the spec.
  16 //-----------------------------------------------------------------------------
  17 #define CRC_14443_A     0x6363  /* ITU-V.41 */
  18 #define CRC_14443_B     0xFFFF  /* ISO/IEC 13239 (formerly ISO/IEC 3309) */
  19 #define CRC_ICLASS      0xE012  /* ICLASS PRERFIX */
  20
  21 void ComputeCrc14443(int CrcType,
  22                      const unsigned char *Data, int Length,
  23                      unsigned char *TransmitFirst,
  24                      unsigned char *TransmitSecond);
  25 int CheckCrc14443(int CrcType, const unsigned char *Data, int Length);
  26
  27 #endif