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This commit is contained in:
Philippe Teuwen 2019-03-10 00:00:59 +01:00
commit 0373696662
483 changed files with 56514 additions and 52451 deletions
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8
common/iso14443crc.c
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@ -9,7 +9,8 @@
#include "iso14443crc.h"
uint16_t UpdateCrc14443(uint8_t b, uint16_t *crc) {
uint16_t UpdateCrc14443(uint8_t b, uint16_t *crc)
{
b = (b ^ (uint8_t)((*crc) & 0x00FF));
b = (b ^ (b << 4));
*crc = (*crc >> 8) ^ ((uint16_t) b << 8) ^ ((uint16_t) b << 3) ^ ((uint16_t) b >> 4);
@ -30,12 +31,13 @@ void ComputeCrc14443(uint16_t CrcType, const uint8_t *data, int length,
if (CrcType == CRC_14443_B)
crc = ~crc; /* ISO/IEC 13239 (formerly ISO/IEC 3309) */
*TransmitFirst = (uint8_t) (crc & 0xFF);
*TransmitFirst = (uint8_t)(crc & 0xFF);
*TransmitSecond = (uint8_t)((crc >> 8) & 0xFF);
return;
}
bool CheckCrc14443(uint16_t CrcType, const uint8_t *data, int length) {
bool CheckCrc14443(uint16_t CrcType, const uint8_t *data, int length)
{
if (length < 3) return false;
uint8_t b1, b2;
ComputeCrc14443(CrcType, data, length - 2, &b1, &b2);