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add nested auth decoding to hf mf sniff

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This commit is contained in:
Oleg Moiseenko 2018-02-09 16:50:55 +02:00 • committed by pwpiwi
commit a37725facf
8 changed files with 159 additions and 22 deletions
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6
common/parity.h
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@ -13,6 +13,7 @@
#include <stdint.h>
#include <stdbool.h>
#include "string.h"
extern const uint8_t OddByteParity[256];
@ -21,6 +22,11 @@ static inline bool oddparity8(const uint8_t x) {
return OddByteParity[x];
}
static inline void oddparitybuf(const uint8_t *x, size_t len, uint8_t *parity) {
memset(parity, 0x00, (len - 1) / 8 + 1);
for (int i = 0; i < len; i++)
parity[i / 8] |= oddparity8(x[i]) << (7 - (i % 8));
}
static inline bool evenparity8(const uint8_t x) {
return !OddByteParity[x];