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FIX: legic_prng.c according to user on forum ref: http://www.proxmark.org/forum/viewtopic.php?pid=5437#p5437 needs to be "& 0x7F"

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ADD:  method for calculating the storage crc8.
This commit is contained in:
iceman1001 2016-02-12 12:34:05 +01:00
commit ee4e281675
3 changed files with 35 additions and 7 deletions
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9
common/crc.h
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@ -26,7 +26,7 @@ typedef struct crc {
* final_xor is XORed onto the state before returning it from crc_result(). */
extern void crc_init(crc_t *crc, int order, uint32_t polynom, uint32_t initial_value, uint32_t final_xor);
/* Update the crc state. data is the data of length data_width bits (only the the
/* Update the crc state. data is the data of length data_width bits (only the
* data_width lower-most bits are used).
*/
extern void crc_update(crc_t *crc, uint32_t data, int data_width);
@ -38,7 +38,12 @@ extern void crc_clear(crc_t *crc);
extern uint32_t crc_finish(crc_t *crc);
// Calculate CRC-8/Maxim checksum
uint32_t CRC8Maxim(uint8_t *buff, size_t size );
uint32_t CRC8Maxim(uint8_t *buff, size_t size);
// Calculate CRC-8/Legic checksum
uint32_t CRC8Legic(uint8_t *buff, size_t size);
uint32_t SwapBits(uint32_t value, int nrbits);
/* Static initialization of a crc structure */
#define CRC_INITIALIZER(_order, _polynom, _initial_value, _final_xor) { \
.state = ((_initial_value) & ((1L<<(_order))-1)), \