ADD: added the possibility to load a default pwd file to be used with the "lf t55xx...

[proxmark3-svn] / client / loclass / cipher.c

diff --git a/client/loclass/cipher.c b/client/loclass/cipher.c
index 1c9dae8b5a535266936af39d942aece4961c4185..6333b4b056642831abcc682b1e2f2e8ea206fc5d 100644 (file)
--- a/client/loclass/cipher.c
+++ b/client/loclass/cipher.c
@@ -30,19 +30,23 @@
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
- * along with IClassCipher.  If not, see <http://www.gnu.org/licenses/>.
+ * along with loclass.  If not, see <http://www.gnu.org/licenses/>.
+ * 
+ * 
+ * 
  ****************************************************************************/
 
+
 #include "cipher.h"
 #include "cipherutils.h"
-#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <stdbool.h>
 #include <stdint.h>
-#include <time.h>
+#ifndef ON_DEVICE
 #include "fileutils.h"
-uint8_t keytable[] = { 0,0,0,0,0,0,0,0};
+#endif
+
 
 /**
 * Definition 1 (Cipher state). A cipher state of iClass s is an element of F 40/2
@@ -217,27 +221,48 @@ void MAC(uint8_t* k, BitstreamIn input, BitstreamOut out)
        output(k,initState,&input_32_zeroes,&out);
 }       
 
-void doMAC(uint8_t *cc_nr_p, int length, uint8_t *div_key_p, uint8_t mac[4])
+void doMAC(uint8_t *cc_nr_p, uint8_t *div_key_p, uint8_t mac[4])
 {
-    uint8_t *cc_nr;
+       uint8_t cc_nr[13] = { 0 };
     uint8_t div_key[8];
-    cc_nr=(uint8_t*)malloc(length+1);
-    memcpy(cc_nr,cc_nr_p,length);
+       //cc_nr=(uint8_t*)malloc(length+1);
+
+       memcpy(cc_nr,cc_nr_p,12);
     memcpy(div_key,div_key_p,8);
     
-       reverse_arraybytes(cc_nr,length);
-       BitstreamIn bitstream = {cc_nr,length * 8,0};
+       reverse_arraybytes(cc_nr,12);
+       BitstreamIn bitstream = {cc_nr,12 * 8,0};
        uint8_t dest []= {0,0,0,0,0,0,0,0};
        BitstreamOut out = { dest, sizeof(dest)*8, 0 };
        MAC(div_key,bitstream, out);
        //The output MAC must also be reversed
        reverse_arraybytes(dest, sizeof(dest));
        memcpy(mac,dest,4);
-    //printf("Calculated_MAC\t%02x%02x%02x%02x\n", dest[0],dest[1],dest[2],dest[3]);
-       free(cc_nr);
+       //free(cc_nr);
     return;
 }
+void doMAC_N(uint8_t *address_data_p, uint8_t address_data_size, uint8_t *div_key_p, uint8_t mac[4])
+{
+       uint8_t *address_data;
+       uint8_t div_key[8];
+       address_data = (uint8_t*) malloc(address_data_size);
+
+       memcpy(address_data, address_data_p, address_data_size);
+       memcpy(div_key, div_key_p, 8);
+
+       reverse_arraybytes(address_data, address_data_size);
+       BitstreamIn bitstream = {address_data, address_data_size * 8, 0};
+       uint8_t dest []= {0,0,0,0,0,0,0,0};
+       BitstreamOut out = { dest, sizeof(dest)*8, 0 };
+       MAC(div_key, bitstream, out);
+       //The output MAC must also be reversed
+       reverse_arraybytes(dest, sizeof(dest));
+       memcpy(mac, dest, 4);
+       free(address_data);
+       return;
+}
 
+#ifndef ON_DEVICE
 int testMAC()
 {
        prnlog("[+] Testing MAC calculation...");
@@ -249,7 +274,7 @@ int testMAC()
        uint8_t correct_MAC[4] = {0x1d,0x49,0xC9,0xDA};
 
        uint8_t calculated_mac[4] = {0};
-    doMAC(cc_nr, 12,div_key, calculated_mac);
+       doMAC(cc_nr,div_key, calculated_mac);
 
        if(memcmp(calculated_mac, correct_MAC,4) == 0)
        {
@@ -265,3 +290,4 @@ int testMAC()
 
        return 0;
 }
+#endif