fix char* pointer not assigned

[proxmark3-svn] / client / cmdhfmf.c

diff --git a/client/cmdhfmf.c b/client/cmdhfmf.c
index 5ef5273a4013aa759905c16ded2df9c57dcbfc20..48e78b1c2fcad2a74a90de187356d346ed54492c 100644 (file)
--- a/client/cmdhfmf.c
+++ b/client/cmdhfmf.c
@@ -18,7 +18,6 @@ int CmdHF14AMifare(const char *Cmd)
        uint32_t nt = 0, nr = 0;\r
        uint64_t par_list = 0, ks_list = 0, r_key = 0;\r
        int16_t isOK = 0;\r
-       uint8_t keyBlock[8] = {0};\r
 \r
        UsbCommand c = {CMD_READER_MIFARE, {true, 0, 0}};\r
 \r
@@ -59,6 +58,8 @@ start:
                                case -1 : PrintAndLog("Button pressed. Aborted.\n"); break;\r
                                case -2 : PrintAndLog("Card is not vulnerable to Darkside attack (doesn't send NACK on authentication requests).\n"); break;\r
                                case -3 : PrintAndLog("Card is not vulnerable to Darkside attack (its random number generator is not predictable).\n"); break;\r
+                               case -4 : PrintAndLog("Card is not vulnerable to Darkside attack (its random number generator seems to be based on the wellknown");\r
+                                                       PrintAndLog("generating polynomial with 16 effective bits only, but shows unexpected behaviour.\n"); break;\r
                                default: ;\r
                        }\r
                        break;\r
@@ -74,22 +75,13 @@ start:
        if (nonce2key(uid, nt, nr, par_list, ks_list, &r_key)) {\r
                isOK = 2;\r
                PrintAndLog("Key not found (lfsr_common_prefix list is null). Nt=%08x", nt);    \r
-       } else {\r
-               printf("------------------------------------------------------------------\n");\r
-               PrintAndLog("Key found:%012"llx" \n", r_key);\r
-\r
-               num_to_bytes(r_key, 6, keyBlock);\r
-               isOK = mfCheckKeys(0, 0, 1, keyBlock, &r_key);\r
-       }\r
-       \r
-       if (!isOK) \r
-               PrintAndLog("Found valid key:%012"llx, r_key);\r
-       else\r
-       {\r
-               if (isOK != 2) PrintAndLog("Found invalid key. ");      \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
+               isOK = 0;\r
+               printf("------------------------------------------------------------------\n");\r
+               PrintAndLog("Found valid key:%012"llx" \n", r_key);\r
        }\r
        \r
        PrintAndLog("");\r
@@ -689,7 +681,7 @@ int CmdHF14AMfNested(const char *Cmd)
                        for (j = 0; j < 2; j++) {\r
                                if (e_sector[i].foundKey[j]) continue;\r
                                \r
-                               res = mfCheckKeys(FirstBlockOfSector(i), j, 6, keyBlock, &key64);\r
+                               res = mfCheckKeys(FirstBlockOfSector(i), j, true, 6, keyBlock, &key64);\r
                                \r
                                if (!res) {\r
                                        e_sector[i].Key[j] = key64;\r
@@ -973,7 +965,7 @@ int CmdHF14AMfChk(const char *Cmd)
                        uint32_t max_keys = keycnt>USB_CMD_DATA_SIZE/6?USB_CMD_DATA_SIZE/6:keycnt;\r
                        for (uint32_t c = 0; c < keycnt; c+=max_keys) {\r
                                uint32_t size = keycnt-c>max_keys?max_keys:keycnt-c;\r
-                               res = mfCheckKeys(b, t, size, &keyBlock[6*c], &key64);\r
+                               res = mfCheckKeys(b, t, true, size, &keyBlock[6*c], &key64);\r
                                if (res != 1) {\r
                                        if (!res) {\r
                                                PrintAndLog("Found valid key:[%012"llx"]",key64);\r
@@ -1959,6 +1951,13 @@ int CmdHF14AMfSniff(const char *Cmd){
        return 0;\r
 }\r
 \r
+//needs nt, ar, at, Data to decrypt\r
+int CmdDecryptTraceCmds(const char *Cmd){\r
+       uint8_t data[50];\r
+       int len = 0;\r
+       param_gethex_ex(Cmd,3,data,&len);\r
+       return tryDecryptWord(param_get32ex(Cmd,0,0,16),param_get32ex(Cmd,1,0,16),param_get32ex(Cmd,2,0,16),data,len/2);\r
+}\r
 \r
 static command_t CommandTable[] =\r
 {\r
@@ -1987,6 +1986,7 @@ static command_t CommandTable[] =
   {"cgetsc",   CmdHF14AMfCGetSc,               0, "Read sector - Magic Chinese card"},\r
   {"cload",            CmdHF14AMfCLoad,                0, "Load dump into magic Chinese card"},\r
   {"csave",            CmdHF14AMfCSave,                0, "Save dump from magic Chinese card into file or emulator"},\r
+  {"decrypt", CmdDecryptTraceCmds,1, "[nt] [ar_enc] [at_enc] [data] - to decrypt snoop or trace"},\r
   {NULL, NULL, 0, NULL}\r
 };\r
 \r