Merge remote-tracking branch 'upstream/master' into iclass

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

diff --git a/client/loclass/cipher.c b/client/loclass/cipher.c
index aefb5df57f0cadb12b6ba2b82720fcdbfd2fdd3b..2aae093debc9150d99ab0a5c8fe2c7c36864b080 100644 (file)
--- a/client/loclass/cipher.c
+++ b/client/loclass/cipher.c
@@ -1,5 +1,17 @@
 /*****************************************************************************
- * This file is part of iClassCipher. It is a reconstructon of the cipher engine
+ * WARNING
+ *
+ * THIS CODE IS CREATED FOR EXPERIMENTATION AND EDUCATIONAL USE ONLY. 
+ * 
+ * USAGE OF THIS CODE IN OTHER WAYS MAY INFRINGE UPON THE INTELLECTUAL 
+ * PROPERTY OF OTHER PARTIES, SUCH AS INSIDE SECURE AND HID GLOBAL, 
+ * AND MAY EXPOSE YOU TO AN INFRINGEMENT ACTION FROM THOSE PARTIES. 
+ * 
+ * THIS CODE SHOULD NEVER BE USED TO INFRINGE PATENTS OR INTELLECTUAL PROPERTY RIGHTS. 
+ *
+ *****************************************************************************
+ *
+ * This file is part of loclass. It is a reconstructon of the cipher engine
  * used in iClass, and RFID techology.
  *
  * The implementation is based on the work performed by
@@ -18,19 +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
@@ -205,22 +221,48 @@ void MAC(uint8_t* k, BitstreamIn input, BitstreamOut out)
        output(k,initState,&input_32_zeroes,&out);
 }
 
-void doMAC(uint8_t cc_nr[12],uint8_t div_key[8], uint8_t mac[4])
+void doMAC(uint8_t *cc_nr_p, uint8_t *div_key_p, uint8_t mac[4])
+{
+       uint8_t cc_nr[13] = { 0 };
+    uint8_t div_key[8];
+       //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,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);
+       //free(cc_nr);
+    return;
+}
+void doMAC_N(uint8_t *cc_nr_p,uint8_t cc_nr_size, uint8_t *div_key_p, uint8_t mac[4])
 {
-       // Reversed "on-the-wire" data
-       uint8_t cc_nr_r[12]  = {0};
-       reverse_arraycopy(cc_nr, cc_nr_r,12);
-       BitstreamIn bitstream = {cc_nr_r,12 * 8,0};
-       uint8_t dest [8]= {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);
-       return;
+    uint8_t *cc_nr;
+    uint8_t div_key[8];
+    cc_nr = (uint8_t*) malloc(cc_nr_size);
+    
+    memcpy(cc_nr,cc_nr_p,cc_nr_size);
+    memcpy(div_key,div_key_p,8);
+    
+    reverse_arraybytes(cc_nr,cc_nr_size);
+    BitstreamIn bitstream = {cc_nr,cc_nr_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(cc_nr);
+    return;
 }
 
+#ifndef ON_DEVICE
 int testMAC()
 {
        prnlog("[+] Testing MAC calculation...");
@@ -232,7 +274,7 @@ int testMAC()
        uint8_t correct_MAC[4] = {0x1d,0x49,0xC9,0xDA};
 
        uint8_t calculated_mac[4] = {0};
-       doMAC(cc_nr, div_key, calculated_mac);
+       doMAC(cc_nr,div_key, calculated_mac);
 
        if(memcmp(calculated_mac, correct_MAC,4) == 0)
        {
@@ -248,3 +290,4 @@ int testMAC()
 
        return 0;
 }
+#endif