X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/e6ee6c4cd135c29fcd3812e0ceea8fe17497700d..f4a57e861d88657e58ef01cb96ce732d588ca91f:/client/loclass/cipher.c

diff --git a/client/loclass/cipher.c b/client/loclass/cipher.c
index 463ba9be..7d3950b1 100644
--- 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
@@ -203,29 +219,29 @@ void MAC(uint8_t* k, BitstreamIn input, BitstreamOut out)
 	BitstreamIn input_32_zeroes = {zeroes_32,sizeof(zeroes_32)*8,0};
 	State initState = suc(k,init(k),&input);
 	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);
-    memcpy(div_key,div_key_p,8);
+	//cc_nr=(uint8_t*)malloc(length+1);
 
-    reverse_arraybytes(cc_nr,length);
-    BitstreamIn bitstream = {cc_nr,length * 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);
+	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;
 }
-
+#ifndef ON_DEVICE
 int testMAC()
 {
 	prnlog("[+] Testing MAC calculation...");
@@ -237,7 +253,7 @@ 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)
 	{
@@ -248,8 +264,9 @@ int testMAC()
 		prnlog("[+] FAILED: MAC calculation failed:");
 		printarr("    Calculated_MAC", calculated_mac, 4);
 		printarr("    Correct_MAC   ", correct_MAC, 4);
-		return 1;
-	}
+	return 1;
+}
 
 	return 0;
 }
+#endif