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hitag2crack refactor

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This commit is contained in:
Philippe Teuwen
2026-02-22 13:10:26 +01:00
parent ca72cc5c88
commit d8ee084ffe
2 changed files with 0 additions and 22 deletions
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tools/hitag2crack/crack5opencl/hitag2.c
-20
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@@ -6,26 +6,6 @@
//#if FORCE_HITAG2_FULL == 0
uint32_t hitag2_crypt(uint64_t x) {
const uint32_t ht2_function4a = 0x2C79; // 0010 1100 0111 1001
const uint32_t ht2_function4b = 0x6671; // 0110 0110 0111 0001
const uint32_t ht2_function5c = 0x7907287B; // 0111 1001 0000 0111 0010 1000 0111 1011
uint32_t bitindex;
bitindex = (ht2_function4a >> pickbits2_2(x, 1, 4)) & 1;
bitindex |= ((ht2_function4b << 1) >> pickbits1_1_2(x, 7, 11, 13)) & 0x02;
bitindex |= ((ht2_function4b << 2) >> pickbits1x4(x, 16, 20, 22, 25)) & 0x04;
bitindex |= ((ht2_function4b << 3) >> pickbits2_1_1(x, 27, 30, 32)) & 0x08;
bitindex |= ((ht2_function4a << 4) >> pickbits1_2_1(x, 33, 42, 45)) & 0x10;
#if defined(DEBUG_HITAG2) && DEBUG_HITAG2 == 1
printf("hitag2_crypt bitindex = %02x\n", bitindex);
#endif
return (ht2_function5c >> bitindex) & 1;
}
// try state
// todo, changes arguments, only what is needed
tools/hitag2crack/crack5opencl/hitag2.h
-2
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@@ -34,8 +34,6 @@
#define pickbits2_1_1(S, A, B, C) ( ((S >> A) & 3) | ((S >> (B - 2)) & 4) | ((S >> (C - 3)) & 8) )
#define pickbits1_2_1(S, A, B, C) ( ((S >> A) & 1) | ((S >> (B - 1)) & 6) | ((S >> (C - 3)) & 8) )
uint32_t hitag2_crypt(uint64_t x);
// try_state
bool try_state(uint64_t s, uint32_t uid, uint32_t aR2, uint32_t nR1, uint32_t nR2, uint64_t *key);