mirror of
https://github.com/Proxmark/proxmark3.git
synced 2024-09-21 23:36:51 +08:00
4c16ae80f0
- correctly using stdtypes.h printf and scanf format string macros (PRIx64 et al) - coverity fixes to client/cmdhfmf.c - fix linker warning re missing entry point when linking fullimage.elf
68 lines
2.1 KiB
C
Executable file
68 lines
2.1 KiB
C
Executable file
#include <inttypes.h>
|
|
#include "crapto1.h"
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
|
|
int main (int argc, char *argv[]) {
|
|
struct Crypto1State *s,*t;
|
|
uint64_t key; // recovered key
|
|
uint32_t uid; // serial number
|
|
uint32_t nt; // tag challenge
|
|
uint32_t nr0_enc; // first encrypted reader challenge
|
|
uint32_t ar0_enc; // first encrypted reader response
|
|
uint32_t nr1_enc; // second encrypted reader challenge
|
|
uint32_t ar1_enc; // second encrypted reader response
|
|
uint32_t ks2; // keystream used to encrypt reader response
|
|
|
|
printf("MIFARE Classic key recovery - based 32 bits of keystream\n");
|
|
printf("Recover key from two 32-bit reader authentication answers only!\n\n");
|
|
|
|
if (argc < 7) {
|
|
printf(" syntax: %s <uid> <nt> <{nr_0}> <{ar_0}> <{nr_1}> <{ar_1}>\n\n",argv[0]);
|
|
return 1;
|
|
}
|
|
|
|
sscanf(argv[1],"%x",&uid);
|
|
sscanf(argv[2],"%x",&nt);
|
|
sscanf(argv[3],"%x",&nr0_enc);
|
|
sscanf(argv[4],"%x",&ar0_enc);
|
|
sscanf(argv[5],"%x",&nr1_enc);
|
|
sscanf(argv[6],"%x",&ar1_enc);
|
|
|
|
printf("Recovering key for:\n");
|
|
printf(" uid: %08x\n",uid);
|
|
printf(" nt: %08x\n",nt);
|
|
printf(" {nr_0}: %08x\n",nr0_enc);
|
|
printf(" {ar_0}: %08x\n",ar0_enc);
|
|
printf(" {nr_1}: %08x\n",nr1_enc);
|
|
printf(" {ar_1}: %08x\n",ar1_enc);
|
|
|
|
// Generate lfsr succesors of the tag challenge
|
|
printf("\nLFSR succesors of the tag challenge:\n");
|
|
printf(" nt': %08x\n",prng_successor(nt, 64));
|
|
printf(" nt'': %08x\n",prng_successor(nt, 96));
|
|
|
|
// Extract the keystream from the messages
|
|
printf("\nKeystream used to generate {ar} and {at}:\n");
|
|
ks2 = ar0_enc ^ prng_successor(nt, 64);
|
|
printf(" ks2: %08x\n",ks2);
|
|
|
|
s = lfsr_recovery32(ar0_enc ^ prng_successor(nt, 64), 0);
|
|
|
|
for(t = s; t->odd | t->even; ++t) {
|
|
lfsr_rollback_word(t, 0, 0);
|
|
lfsr_rollback_word(t, nr0_enc, 1);
|
|
lfsr_rollback_word(t, uid ^ nt, 0);
|
|
crypto1_get_lfsr(t, &key);
|
|
crypto1_word(t, uid ^ nt, 0);
|
|
crypto1_word(t, nr1_enc, 1);
|
|
if (ar1_enc == (crypto1_word(t, 0, 0) ^ prng_successor(nt, 64))) {
|
|
printf("\nFound Key: [%012" PRIx64 "]\n\n",key);
|
|
break;
|
|
}
|
|
}
|
|
free(s);
|
|
|
|
return 0;
|
|
}
|