FIX: dumptoemul.lua removed the extra linebreak in the end, making some load commands...

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

diff --git a/client/nonce2key/nonce2key.c b/client/nonce2key/nonce2key.c
index 111f58cd6b07a8d21ddff7e006e5de485bf4830b..968e1a9d23eeac19e083473c5327703c43ed320f 100644 (file)
--- a/client/nonce2key/nonce2key.c
+++ b/client/nonce2key/nonce2key.c
@@ -149,3 +149,99 @@ int nonce2key(uint32_t uid, uint32_t nt, uint32_t nr, uint64_t par_info, uint64_
        
        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",uid);
+       // 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==10)
+                               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;
+}