CHG: syntax suger.

[proxmark3-svn] / client / cmdhfmf.c

diff --git a/client/cmdhfmf.c b/client/cmdhfmf.c
index d6e394442c4c9cfcb5a95c42d5ae71f7f023d276..65c9dcb775b8918d50dddec9d91371e24e0e203f 100644 (file)
--- a/client/cmdhfmf.c
+++ b/client/cmdhfmf.c
@@ -213,9 +213,16 @@ start:
        }       \r
        printf("\n");\r
        \r
-       // par == 0\r
-       if (isOK == -1 && par_list == 0) {\r
-               if (!nonce2key_ex(uid, nt, nr, ks_list, &r_key) ){\r
+       // par == 0,  and -4\r
+       if (isOK == -4 && par_list == 0) {\r
+               // this special attack when parities is zero, uses checkkeys. Which now with block/keytype option also needs. \r
+               // but it uses 0|1 instead of 0x60|0x61...\r
+               if (nonce2key_ex(blockNo, keytype - 0x60 , uid, nt, nr, ks_list, &r_key) ){\r
+                       PrintAndLog("Key not found (lfsr_common_prefix list is null).");        \r
+                       PrintAndLog("Failing is expected to happen in 25%% of all cases. Trying again with a different reader nonce...");\r
+                       c.arg[0] = false;\r
+                       goto start;\r
+               } else {\r
                        PrintAndLog("Found valid key: %012"llx" \n", r_key);\r
                        goto END;\r
                }\r