FIX: Coverity, out-of-bounds write, CID# 121336, s_index should take factor in consi...

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

diff --git a/client/nonce2key/nonce2key.c b/client/nonce2key/nonce2key.c
index 032b15c4be11ad7f6635801d38e83b7caecfbff1..b7ab7c322726270c2e89885729a24d4cd229f3c1 100644 (file)
--- a/client/nonce2key/nonce2key.c
+++ b/client/nonce2key/nonce2key.c
@@ -10,56 +10,282 @@
 // MIFARE Darkside hack
 //-----------------------------------------------------------------------------
 
 // MIFARE Darkside hack
 //-----------------------------------------------------------------------------
 

+#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];
-  uint64_t key_recovered;
-  nr = rr = 0;
+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;
+       int64_t *state_s;
+       static uint32_t last_uid;
+       static int64_t *last_keylist;
+       rr = 0;

   
   

-  // Reset the last three significant bits of the reader nonce
-  nr &= 0xffffff1f;
+       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);
-
-  for (pos=0; pos<8; pos++)
-  {
-    ks3x[7-pos] = (ks_info >> (pos*8)) & 0x0f;
-    bt = (par_info >> (pos*8)) & 0xff;
-    for (i=0; i<8; i++)
-    {
-      par[7-pos][i] = (bt >> i) & 0x01;
-    }
-  }
-
-  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);
-    for (pos=0; pos<7; pos++) printf("%01x,", par[i][pos]);
-    printf("%01x|\n", par[i][7]);
-  }
+       PrintAndLog("\nuid(%08x) nt(%08x) par(%016"llx") ks(%016"llx") nr(%08"llx")\n\n", uid, nt, par_info, ks_info, nr);
+
+       for (pos=0; pos<8; pos++) {
+               ks3x[7-pos] = (ks_info >> (pos*8)) & 0x0f;
+               bt = (par_info >> (pos*8)) & 0xff;
+               for (i=0; i<8; i++)     {
+                       par[7-pos][i] = (bt >> i) & 0x01;
+               }
+       }
+
+       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);
+               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);
-       state_s = 0;
-       for (i = 0; (state) && ((state + i)->odd != 0 || (state + i)->even != 0) && (i < 10); i++)
+       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++)

        {
        {

-    printf("%08x|%08x\n",(state+i)->odd, (state+i)->even);
-               state_s = state + 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_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:%"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;

        }
        }

-  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 candidates count: %d\n", key_count);
+
+       // 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++) {
+
+               key64 = *(last_keylist + i);
+               num_to_bytes(key64, 6, keyBlock);
+               key64 = 0;
+               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;
+}
+
+int tryMfk32(uint64_t myuid, uint8_t *data, uint8_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   
+       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);
+
+       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"llx"]",key);
+                       isSuccess = TRUE;
+                       ++counter;
+                       if (counter==20)
+                               break;
+               }
+       }
+       free(s);
+       return isSuccess;
+}
+
+int tryMfk32_moebius(uint64_t myuid, uint8_t *data, uint8_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   
+       bool isSuccess = FALSE;
+       int counter = 0;

        
        

-       *key = key_recovered;
+       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);
+
+       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"llx"]",key);
+                       isSuccess = TRUE;
+                       ++counter;
+                       if (counter==20)
+                               break;
+               }
+       }
+       free(s);
+       return isSuccess;

 }
 }

+
+int tryMfk64(uint64_t myuid, uint8_t *data, uint8_t *outputkey ){
+
+       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);
+       
+       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);
+       crypto1_destroy(revstate);
+       crypto1_destroy(pcs);
+       return 0;
+}
\ No newline at end of file