X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/3ad48540d4d77f50cc62d16acb78f17019ef431d..0d2624a0cc13dbe34392da1f8495af6c64a84ddb:/client/loclass/cipher.c

diff --git a/client/loclass/cipher.c b/client/loclass/cipher.c
index aefb5df5..3b146b10 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
@@ -10,7 +22,7 @@
  *
  * This is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as published
- * by the Free Software Foundation.
+ * by the Free Software Foundation, or, at your option, any later version. 
  *
  * This file is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -18,19 +30,22 @@
  * 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
@@ -98,9 +113,9 @@ uint8_t _select(bool x, bool y, uint8_t r)
 	bool r6 = r >> 1 & 0x1;
 	bool r7 = r & 0x1;
 
-	bool z0 = (r0 & r2) ^ (r1 & ~r3) ^ (r2 | r4);
+	bool z0 = (r0 & r2) ^ (r1 & !r3) ^ (r2 | r4);
 	bool z1 = (r0 | r2) ^ ( r5 | r7) ^ r1 ^ r6 ^ x ^ y;
-	bool z2 = (r3 & ~r5) ^ (r4 & r6 ) ^ r7 ^ x;
+	bool z2 = (r3 & !r5) ^ (r4 & r6 ) ^ r7 ^ x;
 
 	// The three bitz z0.. z1 are packed into a uint8_t:
 	// 00000ZZZ
@@ -205,22 +220,48 @@ 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])
 {
-	// 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};
+	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 *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...");
@@ -232,7 +273,7 @@ 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 +289,4 @@ int testMAC()
 
 	return 0;
 }
+#endif