#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;
byte_t bt, ks3x[8], par[8][8];
// Reset the last three significant bits of the reader nonce
nr &= 0xffffff1f;
- PrintAndLog("\nuid(%08x) nt(%08x) par(%016"llx") ks(%016"llx") nr(%08"llx")\n\n", uid, nt, par_info, ks_info, nr);
+ PrintAndLog("uid(%08x) nt(%08x) par(%016"llx") ks(%016"llx") nr(%08"llx")\n", uid, nt, par_info, ks_info, nr);
for ( pos = 0; pos < 8; pos++ ) {
ks3x[7-pos] = (ks_info >> (pos*8)) & 0x0f;
}
}
+ printf("+----+--------+---+-----+---------------+\n");
printf("|diff|{nr} |ks3|ks3^5|parity |\n");
printf("+----+--------+---+-----+---------------+\n");
-
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);
+ 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");
+ clock_t t1 = clock();
+
state = lfsr_common_prefix(nr, rr, ks3x, par);
lfsr_rollback_word(state, uid^nt, 0);
crypto1_get_lfsr(state, key);
crypto1_destroy(state);
+
+ t1 = clock() - t1;
+ if ( t1 > 0 ) PrintAndLog("Time in nonce2key: %.0f ticks \n", (float)t1);
return 0;
}
-// *outputkey is not used...
-int tryMfk32(uint64_t myuid, uint8_t *data, uint8_t *outputkey ){
+// call when PAR == 0, special attack?
+int nonce2key_ex(uint32_t uid, uint32_t nt, uint32_t nr, uint64_t ks_info, uint64_t * key) {
+ struct Crypto1State *state;
+ uint32_t i, pos, key_count;
+ byte_t ks3x[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;
+
+ PrintAndLog("uid(%08x) nt(%08x) ks(%016"llx") nr(%08"llx")\n", uid, nt, ks_info, nr);
+
+ for (pos=0; pos<8; pos++) {
+ ks3x[7-pos] = (ks_info >> (pos*8)) & 0x0f;
+ }
+
+ PrintAndLog("parity is all zero,try special attack! just wait for few more seconds");
+ clock_t t1 = clock();
+
+ state = lfsr_common_prefix_ex(nr, ks3x);
+ 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;
+
+ qsort(state_s, i, sizeof(*state_s), compar_int);
+ *(state_s + i) = -1;
+
+ //Create the intersection:
+ if ( last_keylist != NULL) {
+ int64_t *p1, *p2, *p3;
+ p1 = p3 = last_keylist;
+ p2 = state_s;
+ while ( *p1 != -1 && *p2 != -1 ) {
+ if (compar_int(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_int(p1, p2) == -1) ++p1;
+ while (compar_int(p1, p2) == 1) ++p2;
+ }
+ }
+ key_count = p3 - last_keylist;;
+ } else {
+ key_count = 0;
+ }
+
+ printf("key_count:%d\n", key_count);
+
+ // The list may still contain several key candidates. Test each of them with mfCheckKeys
+ uint8_t keyBlock[6];
+ uint64_t key64;
+ for (i = 0; i < key_count; i++) {
+ key64 = *(last_keylist + i);
+ num_to_bytes(key64, 6, keyBlock);
+ key64 = 0;
+ if (!mfCheckKeys(0, 0, TRUE, 1, keyBlock, &key64)) { //block 0,A,
+ *key = key64;
+ free(last_keylist);
+ last_keylist = NULL;
+ free(state);
+ return 0;
+ }
+ }
+
+ t1 = clock() - t1;
+ if ( t1 > 0 ) PrintAndLog("Time in nonce2key_special: %.0f ticks \n", (float)t1);
+
+ free(last_keylist);
+ last_keylist = state_s;
+ return 1;
+}
+
+int tryMfk32(uint8_t *data, uint64_t *outputkey ){
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
+ uint64_t key; // recovered key
+ uint32_t uid = le32toh(data);
+ uint32_t nt = le32toh(data+4); // tag challenge
+ uint32_t nr0_enc = le32toh(data+8); // first encrypted reader challenge
+ uint32_t ar0_enc = le32toh(data+12); // first encrypted reader response
+ //+16 uid2
+ //+20 nt2
+ uint32_t nr1_enc = le32toh(data+24); // second encrypted reader challenge
+ uint32_t ar1_enc = le32toh(data+28); // second encrypted reader response
bool isSuccess = FALSE;
int counter = 0;
-
- uid = myuid;//(uint32_t)bytes_to_num(data + 0, 4);
- nt = *(uint32_t*)(data+8);
- nr0_enc = *(uint32_t*)(data+12);
- ar0_enc = *(uint32_t*)(data+16);
- nr1_enc = *(uint32_t*)(data+32);
- ar1_enc = *(uint32_t*)(data+36);
-
- // PrintAndLog("recovering key for:");
- // PrintAndLog(" uid: %08x %08x",uid, myuid);
- // PrintAndLog(" nt: %08x",nt);
- // PrintAndLog(" {nr_0}: %08x",nr0_enc);
- // PrintAndLog(" {ar_0}: %08x",ar0_enc);
- // PrintAndLog(" {nr_1}: %08x",nr1_enc);
- // PrintAndLog(" {ar_1}: %08x",ar1_enc);
+ PrintAndLog("Enter mfkey32");
+ clock_t t1 = clock();
s = lfsr_recovery32(ar0_enc ^ prng_successor(nt, 64), 0);
for(t = s; t->odd | t->even; ++t) {
PrintAndLog("Found Key: [%012"llx"]", key);
isSuccess = TRUE;
++counter;
- if (counter==20)
+ if (counter==100)
break;
}
}
-
- num_to_bytes(key, 6, outputkey);
- crypto1_destroy(t);
+ t1 = clock() - t1;
+ if ( t1 > 0 ) PrintAndLog("Time in mf32key: %.0f ticks \n", (float)t1);
+ *outputkey = ( isSuccess ) ? key : 0;
+ crypto1_destroy(s);
return isSuccess;
}
-int tryMfk32_moebius(uint64_t myuid, uint8_t *data, uint8_t *outputkey ){
-
+int tryMfk32_moebius(uint8_t *data, uint64_t *outputkey ){
struct Crypto1State *s, *t;
- uint64_t key; // recovered key
- uint32_t uid; // serial number
- uint32_t nt0; // tag challenge first
- uint32_t nt1; // tag challenge second
- 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
+ uint64_t key = 0; // recovered key
+ uint32_t uid = le32toh(data);
+ uint32_t nt0 = le32toh(data+4); // first tag challenge (nonce)
+ uint32_t nr0_enc = le32toh(data+8); // first encrypted reader challenge
+ uint32_t ar0_enc = le32toh(data+12); // first encrypted reader response
+ //uint32_t uid1 = le32toh(data+16);
+ uint32_t nt1 = le32toh(data+20); // second tag challenge (nonce)
+ uint32_t nr1_enc = le32toh(data+24); // second encrypted reader challenge
+ uint32_t ar1_enc = le32toh(data+28); // second encrypted reader response
bool isSuccess = FALSE;
int counter = 0;
- uid = myuid;//(uint32_t)bytes_to_num(data + 0, 4);
- nt0 = *(uint32_t*)(data+8);
- nr0_enc = *(uint32_t*)(data+12);
- ar0_enc = *(uint32_t*)(data+16);
- nt1 = *(uint32_t*)(data+8);
- nr1_enc = *(uint32_t*)(data+32);
- ar1_enc = *(uint32_t*)(data+36);
+ PrintAndLog("Enter mfkey32_moebius");
+ clock_t t1 = clock();
s = lfsr_recovery32(ar0_enc ^ prng_successor(nt0, 64), 0);
break;
}
}
- num_to_bytes(key, 6, outputkey);
- crypto1_destroy(t);
+ t1 = clock() - t1;
+ if ( t1 > 0 ) PrintAndLog("Time in mfkey32_moebius: %.0f ticks \n", (float)t1);
+ *outputkey = ( isSuccess ) ? key : 0;
+ crypto1_destroy(s);
return isSuccess;
}
-int tryMfk64(uint64_t myuid, uint8_t *data, uint8_t *outputkey ){
+int tryMfk64_ex(uint8_t *data, uint64_t *outputkey){
+ uint32_t uid = le32toh(data);
+ uint32_t nt = le32toh(data+4); // tag challenge
+ uint32_t nr_enc = le32toh(data+8); // encrypted reader challenge
+ uint32_t ar_enc = le32toh(data+12); // encrypted reader response
+ uint32_t at_enc = le32toh(data+16); // encrypted tag response
+ return tryMfk64(uid, nt, nr_enc, ar_enc, at_enc, outputkey);
+}
+int tryMfk64(uint32_t uid, uint32_t nt, uint32_t nr_enc, uint32_t ar_enc, uint32_t at_enc, uint64_t *outputkey){
+ uint64_t key = 0; // recovered key
+ uint32_t ks2; // keystream used to encrypt reader response
+ uint32_t ks3; // keystream used to encrypt tag response
struct Crypto1State *revstate;
- uint64_t key; // recovered key
- 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
-
- struct Crypto1State mpcs = {0, 0};
- struct Crypto1State *pcs;
- 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);
+ PrintAndLog("Enter mfkey64");
+ clock_t t1 = clock();
- crypto1_word(pcs, nr_enc , 1);
- at_enc = prng_successor(nt, 96) ^ crypto1_word(pcs, 0, 0);
-
- // 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);
-
// Extract the keystream from the messages
ks2 = ar_enc ^ prng_successor(nt, 64);
ks3 = at_enc ^ prng_successor(nt, 96);
-
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, &key);
- PrintAndLog("Found Key: [%012"llx"]",key);
- num_to_bytes(key, 6, outputkey);
+ PrintAndLog("Found Key: [%012"llx"]", key);
crypto1_destroy(revstate);
+ *outputkey = key;
+
+ t1 = clock() - t1;
+ if ( t1 > 0 ) PrintAndLog("Time in mfkey64: %.0f ticks \n", (float)t1);
return 0;
-}
\ No newline at end of file
+}
projects / proxmark3-svn / blobdiff