X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/6982ac2612c12af9fa65437bf4279007d734cc59..7fe9b0b742d7dae9c5af1d292d11840b5c3cbfae:/common/iso14443_crc.c diff --git a/common/iso14443_crc.c b/common/iso14443_crc.c deleted file mode 100644 index 555de7db..00000000 --- a/common/iso14443_crc.c +++ /dev/null @@ -1,35 +0,0 @@ -//----------------------------------------------------------------------------- -// 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) */ - -static unsigned short UpdateCrc14443(unsigned char ch, unsigned short *lpwCrc) -{ - ch = (ch ^ (unsigned char) ((*lpwCrc) & 0x00FF)); - ch = (ch ^ (ch << 4)); - *lpwCrc = (*lpwCrc >> 8) ^ ((unsigned short) ch << 8) ^ - ((unsigned short) ch << 3) ^ ((unsigned short) ch >> 4); - return (*lpwCrc); -} - -static void ComputeCrc14443(int CrcType, unsigned char *Data, int Length, - unsigned char *TransmitFirst, unsigned char *TransmitSecond) -{ - unsigned char chBlock; - unsigned short wCrc=CrcType; - - do { - chBlock = *Data++; - UpdateCrc14443(chBlock, &wCrc); - } while (--Length); - - if (CrcType == CRC_14443_B) - wCrc = ~wCrc; /* ISO/IEC 13239 (formerly ISO/IEC 3309) */ - - *TransmitFirst = (unsigned char) (wCrc & 0xFF); - *TransmitSecond = (unsigned char) ((wCrc >> 8) & 0xFF); - return; -}