//-----------------------------------------------------------------------------
// MIFARE Darkside hack
//-----------------------------------------------------------------------------
-
-#define __STDC_FORMAT_MACROS
-#include <inttypes.h>
-#define llx PRIx64
-
#include "nonce2key.h"
#include "mifarehost.h"
#include "ui.h"
-
-int compar_state(const void * a, const void * b) {
- // didn't work: (the result is truncated to 32 bits)
- //return (*(int64_t*)b - *(int64_t*)a);
-
- // better:
- if (*(int64_t*)b == *(int64_t*)a) return 0;
- else if (*(int64_t*)b > *(int64_t*)a) return 1;
- else return -1;
-}
+#include "proxmark3.h"
int nonce2key(uint32_t uid, uint32_t nt, uint32_t nr, uint64_t par_info, uint64_t ks_info, uint64_t * key) {
+
struct Crypto1State *state;
- uint32_t i, pos, rr = 0, nr_diff, key_count;//, ks1, ks2;
+ uint32_t i, pos, rr = 0, nr_diff;
byte_t bt, ks3x[8], par[8][8];
- uint64_t key_recovered;
- int64_t *state_s;
-
- static uint32_t last_uid;
- static int64_t *last_keylist;
-
- if (last_uid != uid && last_keylist != NULL) {
- free(last_keylist);
- last_keylist = NULL;
- }
- last_uid = uid;
// Reset the last three significant bits of the reader nonce
nr &= 0xffffff1f;
for ( i = 0; i < 8; i++) {
nr_diff = nr | i << 5;
- printf("| %02x |%08x|", i << 5, nr_diff);
- printf(" %01x | %01x |", ks3x[i], ks3x[i]^5);
- for (pos = 0; pos < 7; pos++)
- printf("%01x,", par[i][pos]);
+ printf("| %02x |%08x| %01x | %01x |", i << 5, nr_diff, ks3x[i], ks3x[i]^5);
+
+ for (pos = 0; pos < 7; pos++) printf("%01x,", par[i][pos]);
printf("%01x|\n", par[i][7]);
}
printf("+----+--------+---+-----+---------------+\n");
- if ( par_info == 0 )
- PrintAndLog("Parity is all zero, try special attack! Wait for few more seconds...");
-
- state = lfsr_common_prefix(nr, rr, ks3x, par, par_info==0);
- state_s = (int64_t*)state;
-
- //char filename[50] ;
- //sprintf(filename, "nt_%08x_%d.txt", nt, nr);
- //printf("name %s\n", filename);
- //FILE* fp = fopen(filename,"w");
- for (i = 0; (state) && ((state + i)->odd != -1); i++)
- {
- lfsr_rollback_word(state+i, uid^nt, 0);
- crypto1_get_lfsr(state + i, &key_recovered);
- *(state_s + i) = key_recovered;
- //fprintf(fp, "%012llx\n",key_recovered);
- }
- //fclose(fp);
-
- if(!state)
- return 1;
-
- // quicksort statelist
- qsort(state_s, i, sizeof(*state_s), compar_state);
-
- // set last element marker
- *(state_s + i) = -1;
-
- //Create the intersection:
- if (par_info == 0 ) {
- if ( last_keylist != NULL) {
- int64_t *p1, *p2, *p3;
- p1 = p3 = last_keylist;
- p2 = state_s;
- while ( *p1 != -1 && *p2 != -1 ) {
- if (compar_state(p1, p2) == 0) {
- printf("p1:%"llx" p2:%"llx" p3:%"llx" key:%012"llx"\n",
- (uint64_t)(p1-last_keylist),
- (uint64_t)(p2-state_s),
- (uint64_t)(p3-last_keylist),
- *p1);
- *p3++ = *p1++;
- p2++;
- } else {
- while (compar_state(p1, p2) == -1) ++p1;
- while (compar_state(p1, p2) == 1) ++p2;
- }
- }
- key_count = p3 - last_keylist;
- } else {
- key_count = 0;
- }
- } else {
- last_keylist = state_s;
- key_count = i;
- }
-
- printf("key candidates count: %d\n", key_count);
+ clock_t t1 = clock();
- // The list may still contain several key candidates. Test each of them with mfCheckKeys
- int res;
- uint8_t keyBlock[6];
- uint64_t key64;
- for (i = 0; i < key_count; i++) {
+ state = lfsr_common_prefix(nr, rr, ks3x, par);
+ lfsr_rollback_word(state, uid^nt, 0);
+ crypto1_get_lfsr(state, key);
+ crypto1_destroy(state);
- key64 = *(last_keylist + i);
- num_to_bytes(key64, 6, keyBlock);
- key64 = 0;
- // Call tag to verify if key is correct
- res = mfCheckKeys(0, 0, false, 1, keyBlock, &key64);
- if (!res) {
- *key = key64;
- free(last_keylist);
- last_keylist = NULL;
- if (par_info == 0)
- free(state);
- return 0;
- }
- }
-
- free(last_keylist);
- last_keylist = state_s;
- return 1;
+ t1 = clock() - t1;
+ if ( t1 > 0 ) PrintAndLog("Time in nonce2key: %.0f ticks \n", (float)t1);
+ return 0;
}
// *outputkey is not used...
break;
}
}
+
+ num_to_bytes(key, 6, outputkey);
crypto1_destroy(t);
- crypto1_destroy(s);
return isSuccess;
}
break;
}
}
+ num_to_bytes(key, 6, outputkey);
crypto1_destroy(t);
- crypto1_destroy(s);
return isSuccess;
}
pcs = &mpcs;
uid = myuid;//(uint32_t)bytes_to_num(data + 0, 4);
- nt = *(uint32_t*)(data+8);
- nr_enc = *(uint32_t*)(data+12);
- ar_enc = *(uint32_t*)(data+16);
+ nt = *(uint32_t*)(data+8);
+ nr_enc = *(uint32_t*)(data+12);
+ ar_enc = *(uint32_t*)(data+16);
crypto1_word(pcs, nr_enc , 1);
at_enc = prng_successor(nt, 96) ^ crypto1_word(pcs, 0, 0);
lfsr_rollback_word(revstate, uid ^ nt, 0);
crypto1_get_lfsr(revstate, &key);
PrintAndLog("Found Key: [%012"llx"]",key);
+ num_to_bytes(key, 6, outputkey);
crypto1_destroy(revstate);
- crypto1_destroy(pcs);
return 0;
-}
\ No newline at end of file
+}
projects / proxmark3-svn / blobdiff