mirror of
https://github.com/RfidResearchGroup/proxmark3.git
synced 2024-11-15 22:29:52 +08:00
57 lines
1.5 KiB
C
57 lines
1.5 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, nr_diff;
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uint8_t bt, i, 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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bt = (par_info >> (pos*8)) & 0xff;
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for ( 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 ( i = 0; i < 8; i++) {
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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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