Merge pull request #219 from marshmellow42/master

[proxmark3-svn] / client / nonce2key / nonce2key.c

diff --git a/client/nonce2key/nonce2key.c b/client/nonce2key/nonce2key.c
index 7459f1bb59aa44653f2205622bf51f5d71ad6211..2c47bc50213dcf767f9d12d342df1c0945082e62 100644 (file)
--- a/client/nonce2key/nonce2key.c
+++ b/client/nonce2key/nonce2key.c
@@ -12,22 +12,42 @@
 
 #define __STDC_FORMAT_MACROS
 #include <inttypes.h>
 
 #define __STDC_FORMAT_MACROS
 #include <inttypes.h>

-#define llx PRIx64

 
 #include "nonce2key.h"
 
 #include "nonce2key.h"

+#include "mifarehost.h"

 #include "ui.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;
   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;
   
   // 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++)
   {
 
   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]);
   }
   
     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;
+}
+