// MIFARE Darkside hack
//-----------------------------------------------------------------------------
+#include <inttypes.h>
+#include <time.h>
+
#include "nonce2key.h"
+#include "mifarehost.h"
#include "ui.h"
+#include "util.h"
+#include "crapto1/crapto1.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;
+}
-int nonce2key(uint32_t uid, uint32_t nt, uint64_t par_info, uint64_t ks_info, uint64_t * key) {
+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 pos, nr, rr, nr_diff;//, ks1, ks2;
- byte_t bt, i, ks3x[8], par[8][8];
+ uint32_t i, pos, rr, nr_diff, key_count;//, ks1, ks2;
+ uint8_t bt, ks3x[8], par[8][8];
uint64_t key_recovered;
- nr = rr = 0;
+ int64_t *state_s;
+ static uint32_t last_uid;
+ static int64_t *last_keylist;
+ rr = 0;
+ 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("\nuid(%08x) nt(%08x) par(%016llx) ks(%016llx)\n\n",uid,nt,par_info,ks_info);
+ PrintAndLog("\nuid(%08x) nt(%08x) par(%016" PRIx64") ks(%016" PRIx64") nr(%08" PRIx32")\n\n",uid,nt,par_info,ks_info,nr);
for (pos=0; pos<8; pos++)
{
printf("%01x|\n", par[i][7]);
}
- state = lfsr_common_prefix(nr, rr, ks3x, par);
- lfsr_rollback_word(state, uid^nt, 0);
- crypto1_get_lfsr(state, &key_recovered);
- crypto1_destroy(state);
+ if (par_info == 0)
+ PrintAndLog("Parity is all zero, trying special attack! Just wait for few more seconds...");
+
+ state = lfsr_common_prefix(nr, rr, ks3x, par);
+ 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_s + i); i++)
+ {
+ lfsr_rollback_word(state+i, uid^nt, 0);
+ crypto1_get_lfsr(state + i, &key_recovered);
+ *(state_s + i) = key_recovered;
+ //fprintf(fp, "%012" PRIx64 "\n",key_recovered);
+ }
+ //fclose(fp);
+
+ if(!state)
+ return 1;
+
+ qsort(state_s, i, sizeof(*state_s), compar_state);
+ *(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:%" PRIx64" p2:%" PRIx64 " p3:%" PRIx64" key:%012" PRIx64 "\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_count:%d\n", key_count);
+
+ // The list may still contain several key candidates. Test each of them with mfCheckKeys
+ for (i = 0; i < key_count; i++) {
+ uint8_t keyBlock[6];
+ uint64_t key64;
+ key64 = *(last_keylist + i);
+ num_to_bytes(key64, 6, keyBlock);
+ key64 = 0;
+ if (!mfCheckKeys(0, 0, false, 1, keyBlock, &key64)) {
+ *key = key64;
+ free(last_keylist);
+ last_keylist = NULL;
+ if (par_info == 0)
+ free(state);
+ return 0;
+ }
+ }
+
+
+ free(last_keylist);
+ last_keylist = state_s;
- *key = key_recovered;
+ return 1;
+}
+
+// 32 bit recover key from 2 nonces
+bool mfkey32(nonces_t data, uint64_t *outputkey) {
+ struct Crypto1State *s,*t;
+ uint64_t outkey = 0;
+ uint64_t key=0; // recovered key
+ uint32_t uid = data.cuid;
+ uint32_t nt = data.nonce; // first tag challenge (nonce)
+ uint32_t nr0_enc = data.nr; // first encrypted reader challenge
+ uint32_t ar0_enc = data.ar; // first encrypted reader response
+ uint32_t nr1_enc = data.nr2; // second encrypted reader challenge
+ uint32_t ar1_enc = data.ar2; // second encrypted reader response
+ clock_t t1 = clock();
+ bool isSuccess = false;
+ uint8_t counter=0;
+
+ 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))) {
+ //PrintAndLog("Found Key: [%012" PRIx64 "]",key);
+ outkey = key;
+ counter++;
+ if (counter==20) break;
+ }
+ }
+ isSuccess = (counter == 1);
+ t1 = clock() - t1;
+ //if ( t1 > 0 ) PrintAndLog("Time in mfkey32: %.0f ticks \nFound %d possible keys", (float)t1, counter);
+ *outputkey = ( isSuccess ) ? outkey : 0;
+ crypto1_destroy(s);
+ /* //un-comment to save all keys to a stats.txt file
+ FILE *fout;
+ if ((fout = fopen("stats.txt","ab")) == NULL) {
+ PrintAndLog("Could not create file name stats.txt");
+ return 1;
+ }
+ fprintf(fout, "mfkey32,%d,%08x,%d,%s,%04x%08x,%.0Lf\r\n", counter, data.cuid, data.sector, (data.keytype) ? "B" : "A", (uint32_t)(outkey>>32) & 0xFFFF,(uint32_t)(outkey&0xFFFFFFFF),(long double)t1);
+ fclose(fout);
+ */
+ return isSuccess;
+}
+
+bool tryMfk32_moebius(nonces_t data, uint64_t *outputkey) {
+ struct Crypto1State *s, *t;
+ uint64_t outkey = 0;
+ uint64_t key = 0; // recovered key
+ uint32_t uid = data.cuid;
+ uint32_t nt0 = data.nonce; // first tag challenge (nonce)
+ uint32_t nr0_enc = data.nr; // first encrypted reader challenge
+ uint32_t ar0_enc = data.ar; // first encrypted reader response
+ uint32_t nt1 = data.nonce2; // second tag challenge (nonce)
+ uint32_t nr1_enc = data.nr2; // second encrypted reader challenge
+ uint32_t ar1_enc = data.ar2; // second encrypted reader response
+ bool isSuccess = false;
+ int counter = 0;
+
+ //PrintAndLog("Enter mfkey32_moebius");
+ clock_t t1 = clock();
+
+ s = lfsr_recovery32(ar0_enc ^ prng_successor(nt0, 64), 0);
- return 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 ^ nt0, 0);
+ crypto1_get_lfsr(t, &key);
+
+ crypto1_word(t, uid ^ nt1, 0);
+ crypto1_word(t, nr1_enc, 1);
+ if (ar1_enc == (crypto1_word(t, 0, 0) ^ prng_successor(nt1, 64))) {
+ //PrintAndLog("Found Key: [%012" PRIx64 "]",key);
+ outkey=key;
+ ++counter;
+ if (counter==20)
+ break;
+ }
+ }
+ isSuccess = (counter == 1);
+ t1 = clock() - t1;
+ //if ( t1 > 0 ) PrintAndLog("Time in mfkey32_moebius: %.0f ticks \nFound %d possible keys", (float)t1,counter);
+ *outputkey = ( isSuccess ) ? outkey : 0;
+ crypto1_destroy(s);
+ /* // un-comment to output all keys to stats.txt
+ FILE *fout;
+ if ((fout = fopen("stats.txt","ab")) == NULL) {
+ PrintAndLog("Could not create file name stats.txt");
+ return 1;
+ }
+ fprintf(fout, "moebius,%d,%08x,%d,%s,%04x%08x,%0.Lf\r\n", counter, data.cuid, data.sector, (data.keytype) ? "B" : "A", (uint32_t) (outkey>>32),(uint32_t)(outkey&0xFFFFFFFF),(long double)t1);
+ fclose(fout);
+ */
+ return isSuccess;
}
+
+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;
+
+ PrintAndLog("Enter mfkey64");
+ clock_t t1 = clock();
+
+ // 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" PRIx64 "]", key);
+ crypto1_destroy(revstate);
+ *outputkey = key;
+
+ t1 = clock() - t1;
+ if ( t1 > 0 ) PrintAndLog("Time in mfkey64: %.0f ticks \n", (float)t1);
+ return 0;
+}
+
projects / proxmark3-svn / blobdiff