-K : Don't use the default keys.

src/mfoc.c

@@ -82,6 +82,7 @@ int main(int argc, char *const argv[])
   // Next default key specified as option (-k)
   uint8_t *defKeys = NULL, *p;
   size_t defKeys_len = 0;
+  bool useDefaultKey = true;
 
   // Array with default Mifare Classic keys
   uint8_t defaultKeys[][6] = {
@@ -129,7 +130,7 @@ int main(int argc, char *const argv[])
   struct slre_cap caps[2];  
 
   // Parse command line arguments
-  while ((ch = getopt(argc, argv, "hD:s:BP:T:S:O:k:t:f:")) != -1) {
+  while ((ch = getopt(argc, argv, "hD:s:BP:T:S:O:k:K:t:f:")) != -1) {
     switch (ch) {
       case 'P':
         // Number of probes
@@ -191,6 +192,21 @@ int main(int argc, char *const argv[])
         fprintf(stdout, "The custom key 0x%012llx has been added to the default keys\n", bytes_to_num(defKeys + defKeys_len, 6));
         defKeys_len = defKeys_len + 6;
 
+        break;
+      case 'K' :
+        // Add this key to the default keys
+        p = realloc(defKeys, defKeys_len + 6);
+        if (!p) {
+          ERR("Cannot allocate memory for defKeys");
+          exit(EXIT_FAILURE);
+        }
+        defKeys = p;
+        memset(defKeys + defKeys_len, 0, 6);
+        num_to_bytes(strtoll(optarg, NULL, 16), 6, defKeys + defKeys_len);
+        fprintf(stdout, "The custom key 0x%012llx has been added to the default keys\n", bytes_to_num(defKeys + defKeys_len, 6));
+        defKeys_len = defKeys_len + 6;
+        useDefaultKey = false;
+
         break;
       case 'O':
         // File output
@@ -324,6 +340,11 @@ int main(int argc, char *const argv[])
   memcpy(mp.mpa.abtAuthUid, t.nt.nti.nai.abtUid + t.nt.nti.nai.szUidLen - 4, sizeof(mp.mpa.abtAuthUid));
   // Iterate over all keys (n = number of keys)
   n = sizeof(defaultKeys) / sizeof(defaultKeys[0]);
+  
+  if (!useDefaultKey) {
+   n -= 13; 
+  }
+
   size_t defKey_bytes_todo = defKeys_len;
   key = 0;
   while (key < n || defKey_bytes_todo) {