mirror of
https://github.com/Proxmark/proxmark3.git
synced 2024-11-15 13:14:27 +08:00
65 lines
2 KiB
C
Executable file
65 lines
2 KiB
C
Executable file
// Test-file: test2.c
|
|
#include "crapto1.h"
|
|
#include <stdio.h>
|
|
|
|
int main (int argc, char *argv[]) {
|
|
struct Crypto1State *revstate;
|
|
uint64_t lfsr;
|
|
uint8_t* plfsr = (uint8_t*)&lfsr;
|
|
uint32_t uid; // serial number
|
|
uint32_t nt; // tag challenge
|
|
uint32_t nr_enc; // encrypted reader challenge
|
|
uint32_t ar_enc; // encrypted reader response
|
|
uint32_t at_enc; // encrypted tag response
|
|
uint32_t ks2; // keystream used to encrypt reader response
|
|
uint32_t ks3; // keystream used to encrypt tag response
|
|
|
|
printf("MIFARE Classic key recovery\n\n");
|
|
|
|
if (argc < 6) {
|
|
printf(" syntax: %s <uid> <nt> <{nr}> <{ar}> <{at}>\n\n",argv[0]);
|
|
return 1;
|
|
}
|
|
|
|
sscanf(argv[1],"%x",&uid);
|
|
sscanf(argv[2],"%x",&nt);
|
|
sscanf(argv[3],"%x",&nr_enc);
|
|
sscanf(argv[4],"%x",&ar_enc);
|
|
sscanf(argv[5],"%x",&at_enc);
|
|
|
|
printf("Recovering key for:\n");
|
|
printf(" uid: %08x\n",uid);
|
|
printf(" nt: %08x\n",nt);
|
|
printf(" {nr}: %08x\n",nr_enc);
|
|
printf(" {ar}: %08x\n",ar_enc);
|
|
printf(" {at}: %08x\n",at_enc);
|
|
|
|
/*
|
|
uint32_t uid = 0x9c599b32;
|
|
uint32_t tag_challenge = 0x82a4166c;
|
|
uint32_t nr_enc = 0xa1e458ce;
|
|
uint32_t reader_response = 0x6eea41e0;
|
|
uint32_t tag_response = 0x5cadf439;
|
|
*/
|
|
// 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 = ar_enc ^ prng_successor(nt, 64);
|
|
ks3 = at_enc ^ prng_successor(nt, 96);
|
|
printf(" ks2: %08x\n",ks2);
|
|
printf(" ks3: %08x\n",ks3);
|
|
|
|
revstate = lfsr_recovery64(ks2, ks3);
|
|
lfsr_rollback_word(revstate, 0, 0);
|
|
lfsr_rollback_word(revstate, 0, 0);
|
|
lfsr_rollback_word(revstate, nr_enc, 1);
|
|
lfsr_rollback_word(revstate, uid ^ nt, 0);
|
|
crypto1_get_lfsr(revstate, &lfsr);
|
|
printf("\nFound Key: [%02x %02x %02x %02x %02x %02x]\n\n",plfsr[5],plfsr[4],plfsr[3],plfsr[2],plfsr[1],plfsr[0]);
|
|
|
|
return 0;
|
|
}
|