minor fix when reading blocks

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

diff --git a/client/nonce2key/nonce2key.c b/client/nonce2key/nonce2key.c
index 1c7ee14c51ec59400b3f2c2998c0ba954ebacd74..032b15c4be11ad7f6635801d38e83b7caecfbff1 100644 (file)
--- a/client/nonce2key/nonce2key.c
+++ b/client/nonce2key/nonce2key.c
@@ -14,7 +14,7 @@
 #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;
+  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;
@@ -47,9 +47,17 @@ int nonce2key(uint32_t uid, uint32_t nt, uint64_t par_info, uint64_t ks_info, ui
   }
   
   state = lfsr_common_prefix(nr, rr, ks3x, par);
-  lfsr_rollback_word(state, uid^nt, 0);
-  crypto1_get_lfsr(state, &key_recovered);
-  crypto1_destroy(state);
+       state_s = 0;
+       for (i = 0; (state) && ((state + i)->odd != 0 || (state + i)->even != 0) && (i < 10); i++)
+       {
+    printf("%08x|%08x\n",(state+i)->odd, (state+i)->even);
+               state_s = state + 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);
        
        *key = key_recovered;