X-Git-Url: http://cvs.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/660d641a03456e99ea83c68dbd3d03bae2b64573..38231ce012c278a912d587b567c02ce40e3df5e1:/client/nonce2key/nonce2key.c

diff --git a/client/nonce2key/nonce2key.c b/client/nonce2key/nonce2key.c
index 7459f1bb..2c47bc50 100644
--- a/client/nonce2key/nonce2key.c
+++ b/client/nonce2key/nonce2key.c
@@ -12,22 +12,42 @@
 
 #define __STDC_FORMAT_MACROS
 #include <inttypes.h>
-#define llx PRIx64
 
 #include "nonce2key.h"
+#include "mifarehost.h"
 #include "ui.h"
 
-int nonce2key(uint32_t uid, uint32_t nt, uint64_t par_info, uint64_t ks_info, uint64_t * key) {
-  struct Crypto1State *state, *state_s;
-  uint32_t pos, nr, rr, nr_diff;//, ks1, ks2;
-  byte_t bt, i, ks3x[8], par[8][8];
+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, uint32_t nr, uint64_t par_info, uint64_t ks_info, uint64_t * key) {
+  struct Crypto1State *state;
+  uint32_t i, pos, rr, nr_diff, key_count;//, ks1, ks2;
+  byte_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(%016"llx") ks(%016"llx")\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++)
   {
@@ -50,20 +70,218 @@ int nonce2key(uint32_t uid, uint32_t nt, uint64_t par_info, uint64_t ks_info, ui
     printf("%01x|\n", par[i][7]);
   }
   
-  state = lfsr_common_prefix(nr, rr, ks3x, par);
-	state_s = 0;
-	for (i = 0; (state) && ((state + i)->odd != 0 || (state + i)->even != 0) && (i < 10); i++)
+	if (par_info==0)
+		PrintAndLog("parity is all zero,try special attack!just 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, "%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
 	{
-    printf("%08x|%08x\n",(state+i)->odd, (state+i)->even);
-		state_s = state + i;
+		last_keylist = state_s;
+		key_count = i;
 	}
-  if (!state_s) return 1;
 	
-  lfsr_rollback_word(state_s, uid^nt, 0);
-  crypto1_get_lfsr(state_s, &key_recovered);
-  if (!state) free(state);
+	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;
+	
+	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;
 	
-	*key = key_recovered;
+	//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;
+}
+