mirror of
https://github.com/RfidResearchGroup/proxmark3.git
synced 2024-11-11 10:14:34 +08:00
57 lines
1.7 KiB
C
57 lines
1.7 KiB
C
#include "crapto1.h"
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#define __STDC_FORMAT_MACROS
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#include <inttypes.h>
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#include <stdio.h>
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int main(const int argc, const char *argv[]) {
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struct Crypto1State *state;
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uint32_t pos, uid, nt, nr, rr;
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uint8_t ks3x[8], par[8][8];
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uint64_t key_recovered;
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uint64_t par_info;
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uint64_t ks_info;
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nr = rr = 0;
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if (argc < 5) {
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printf("\nsyntax: %s <uid> <nt> <par> <ks>\n\n", argv[0]);
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return 1;
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}
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sscanf(argv[1], "%08x", &uid);
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sscanf(argv[2], "%08x", &nt);
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sscanf(argv[3], "%016" SCNx64, &par_info);
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sscanf(argv[4], "%016" SCNx64, &ks_info);
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// Reset the last three significant bits of the reader nonce
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nr &= 0xffffff1f;
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printf("\nuid(%08x) nt(%08x) par(%016" PRIx64 ") ks(%016" PRIx64 ")\n\n", uid, nt, par_info, ks_info);
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for (pos = 0; pos < 8; pos++) {
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ks3x[7 - pos] = (ks_info >> (pos * 8)) & 0x0f;
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uint8_t bt = (par_info >> (pos * 8)) & 0xff;
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for (uint8_t i = 0; i < 8; i++) {
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par[7 - pos][i] = (bt >> i) & 0x01;
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}
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}
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printf("|diff|{nr} |ks3|ks3^5|parity |\n");
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printf("+----+--------+---+-----+---------------+\n");
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for (uint8_t i = 0; i < 8; i++) {
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uint32_t nr_diff = nr | i << 5;
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printf("| %02x |%08x| %01x | %01x |", i << 5, nr_diff, ks3x[i], ks3x[i] ^ 5);
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for (pos = 0; pos < 7; pos++)
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printf("%01x,", par[i][pos]);
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printf("%01x|\n", par[i][7]);
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}
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printf("+----+--------+---+-----+---------------+\n");
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state = lfsr_common_prefix(nr, rr, ks3x, par);
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lfsr_rollback_word(state, uid ^ nt, 0);
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crypto1_get_lfsr(state, &key_recovered);
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printf("\nkey recovered: %012" PRIx64 "\n\n", key_recovered);
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crypto1_destroy(state);
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return 0;
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}
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