X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/aa41c6058a4c5768d524a711af846f43ca7a236c..e0991f6aa7bf7b193080855bb818ce193542c6dc:/client/loclass/elite_crack.c

diff --git a/client/loclass/elite_crack.c b/client/loclass/elite_crack.c
index 1a464b6c..f45c55b5 100644
--- a/client/loclass/elite_crack.c
+++ b/client/loclass/elite_crack.c
@@ -1,14 +1,52 @@
+/*****************************************************************************
+ * 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
+ * Flavio D. Garcia, Gerhard de Koning Gans, Roel Verdult and
+ * Milosch Meriac in the paper "Dismantling IClass".
+ *
+ * Copyright (C) 2014 Martin Holst Swende
+ *
+ * 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, 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
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with loclass.  If not, see <http://www.gnu.org/licenses/>.
+ * 
+ * 
+ ****************************************************************************/
+
 #include <stdint.h>
 #include <stdbool.h>
 #include <string.h>
 #include <stdio.h>
-#include <time.h>
+#include "util.h"
+#include "util_posix.h"
 #include "cipherutils.h"
 #include "cipher.h"
 #include "ikeys.h"
 #include "elite_crack.h"
 #include "fileutils.h"
-#include "des.h"
+#include "mbedtls/des.h"
 
 /**
  * @brief Permutes a key from standard NIST format to Iclass specific format
@@ -113,9 +151,9 @@ void hash1(uint8_t csn[] , uint8_t k[])
 	k[0] = csn[0]^csn[1]^csn[2]^csn[3]^csn[4]^csn[5]^csn[6]^csn[7];
 	k[1] = csn[0]+csn[1]+csn[2]+csn[3]+csn[4]+csn[5]+csn[6]+csn[7];
 	k[2] = rr(swap( csn[2]+k[1] ));
-	k[3] = rr(swap( csn[3]+k[0] ));
-	k[4] = ~rr(swap( csn[4]+k[2] ))+1;
-	k[5] = ~rr(swap( csn[5]+k[3] ))+1;
+	k[3] = rl(swap( csn[3]+k[0] ));
+	k[4] = ~rr( csn[4]+k[2] )+1;
+	k[5] = ~rl( csn[5]+k[3] )+1;
 	k[6] = rr( csn[6]+(k[4]^0x3c) );
 	k[7] = rl( csn[7]+(k[5]^0xc3) );
 	int i;
@@ -141,22 +179,22 @@ void rk(uint8_t *key, uint8_t n, uint8_t *outp_key)
     return;
 }
 
-static des_context ctx_enc = {DES_ENCRYPT,{0}};
-static des_context ctx_dec = {DES_DECRYPT,{0}};
+static mbedtls_des_context ctx_enc = {0};
+static mbedtls_des_context ctx_dec = {0};
 
 void desdecrypt_iclass(uint8_t *iclass_key, uint8_t *input, uint8_t *output)
 {
     uint8_t key_std_format[8] = {0};
     permutekey_rev(iclass_key, key_std_format);
-    des_setkey_dec( &ctx_dec, key_std_format);
-    des_crypt_ecb(&ctx_dec,input,output);
+    mbedtls_des_setkey_dec( &ctx_dec, key_std_format);
+    mbedtls_des_crypt_ecb(&ctx_dec,input,output);
 }
 void desencrypt_iclass(uint8_t *iclass_key, uint8_t *input, uint8_t *output)
 {
     uint8_t key_std_format[8] = {0};
     permutekey_rev(iclass_key, key_std_format);
-    des_setkey_enc( &ctx_enc, key_std_format);
-    des_crypt_ecb(&ctx_enc,input,output);
+    mbedtls_des_setkey_enc( &ctx_enc, key_std_format);
+    mbedtls_des_crypt_ecb(&ctx_enc,input,output);
 }
 
 /**
@@ -356,7 +394,7 @@ int bruteforceItem(dumpdata item, uint16_t keytable[])
 		//Diversify
 		diversifyKey(item.csn, key_sel_p, div_key);
 		//Calc mac
-        doMAC(item.cc_nr,12, div_key,calculated_MAC);
+		doMAC(item.cc_nr, div_key,calculated_MAC);
 
 		if(memcmp(calculated_MAC, item.mac, 4) == 0)
 		{
@@ -411,7 +449,7 @@ int bruteforceItem(dumpdata item, uint16_t keytable[])
  */
 int calculateMasterKey(uint8_t first16bytes[], uint64_t master_key[] )
 {
-	des_context ctx_e = {DES_ENCRYPT,{0}};
+	mbedtls_des_context ctx_e = {0};
 
 	uint8_t z_0[8] = {0};
 	uint8_t y_0[8] = {0};
@@ -430,8 +468,8 @@ int calculateMasterKey(uint8_t first16bytes[], uint64_t master_key[] )
 	permutekey_rev(z_0, z_0_rev);
 
 	// ~K_cus = DESenc(z[0], y[0])
-	des_setkey_enc( &ctx_e, z_0_rev );
-	des_crypt_ecb(&ctx_e, y_0, key64_negated);
+	mbedtls_des_setkey_enc( &ctx_e, z_0_rev );
+	mbedtls_des_crypt_ecb(&ctx_e, y_0, key64_negated);
 
 	int i;
 	for(i = 0; i < 8 ; i++)
@@ -444,8 +482,8 @@ int calculateMasterKey(uint8_t first16bytes[], uint64_t master_key[] )
 	uint8_t key64_stdformat[8] = {0};
 	permutekey_rev(key64, key64_stdformat);
 
-	des_setkey_enc( &ctx_e, key64_stdformat );
-	des_crypt_ecb(&ctx_e, key64_negated, result);
+	mbedtls_des_setkey_enc( &ctx_e, key64_stdformat );
+	mbedtls_des_crypt_ecb(&ctx_e, key64_negated, result);
 	prnlog("\nHigh security custom key (Kcus):");
 	printvar("Std format   ", key64_stdformat,8);
 	printvar("Iclass format", key64,8);
@@ -474,7 +512,7 @@ int bruteforceDump(uint8_t dump[], size_t dumpsize, uint16_t keytable[])
 	uint8_t i;
 	int errors = 0;
 	size_t itemsize = sizeof(dumpdata);
-	clock_t t1 = clock();
+	uint64_t t1 = msclock();
 
 	dumpdata* attack = (dumpdata* ) malloc(itemsize);
 
@@ -484,9 +522,9 @@ int bruteforceDump(uint8_t dump[], size_t dumpsize, uint16_t keytable[])
 		errors += bruteforceItem(*attack, keytable);
 	}
 	free(attack);
-	clock_t t2 = clock();
-	float diff = (((float)t2 - (float)t1) / CLOCKS_PER_SEC );
-	prnlog("\nPerformed full crack in %f seconds",diff);
+	t1 = msclock() - t1;
+	float diff = (float)t1 / 1000.0;
+	prnlog("\nPerformed full crack in %f seconds", diff);
 
 	// Pick out the first 16 bytes of the keytable.
 	// The keytable is now in 16-bit ints, where the upper 8 bits
@@ -525,15 +563,23 @@ int bruteforceFile(const char *filename, uint16_t keytable[])
 	long fsize = ftell(f);
 	fseek(f, 0, SEEK_SET);
 
+	if (fsize < 0) {
+		prnlog("Error, when getting fsize");
+		fclose(f);
+		return 1;
+	}
+
 	uint8_t *dump = malloc(fsize);
-    size_t bytes_read = fread(dump, fsize, 1, f);
+	size_t bytes_read = fread(dump, 1, fsize, f);
 
 	fclose(f);
-    if (bytes_read < fsize)
-    {
-        prnlog("Error, could only read %d bytes (should be %d)",bytes_read, fsize );
-    }
-	return bruteforceDump(dump,fsize,keytable);
+	if (bytes_read < fsize) {
+		prnlog("Error, could only read %d bytes (should be %d)",bytes_read, fsize );
+	}
+
+	uint8_t res = bruteforceDump(dump,fsize,keytable);
+	free(dump);
+	return res;
 }
 /**
  *
@@ -577,9 +623,18 @@ int _testBruteforce()
 			**** The 64-bit HS Custom Key Value = 5B7C62C491C11B39 ****
 		**/
 		uint16_t keytable[128] = {0};
-		//save some time...
-		startvalue = 0x7B0000;
-		errors |= bruteforceFile("iclass_dump.bin",keytable);
+
+		//Test a few variants
+		if(fileExists("iclass_dump.bin"))
+		{
+			errors |= bruteforceFile("iclass_dump.bin",keytable);
+		}else if(fileExists("loclass/iclass_dump.bin")){
+			errors |= bruteforceFile("loclass/iclass_dump.bin",keytable);
+		}else if(fileExists("client/loclass/iclass_dump.bin")){
+			errors |= bruteforceFile("client/loclass/iclass_dump.bin",keytable);
+		}else{
+			prnlog("Error: The file iclass_dump.bin was not found!");
+		}
 	}
 	return errors;
 }
@@ -613,6 +668,21 @@ int _test_iclass_key_permutation()
 	prnlog("[+] Iclass key permutation OK!");
 	return 0;
 }
+int _testHash1()
+{
+    uint8_t csn[8]= {0x01,0x02,0x03,0x04,0xF7,0xFF,0x12,0xE0};
+    uint8_t k[8] = {0};
+    hash1(csn, k);
+    uint8_t expected[8] = {0x7E,0x72,0x2F,0x40,0x2D,0x02,0x51,0x42};
+    if(memcmp(k,expected,8) != 0)
+    {
+        prnlog("Error with hash1!");
+        printarr("calculated", k, 8);
+        printarr("expected", expected, 8);
+        return 1;
+    }
+    return 0;
+}
 
 int testElite()
 {
@@ -645,11 +715,13 @@ int testElite()
         prnlog("[+] Hash2 looks fine...");
     }
 
-    prnlog("[+] Testing key diversification ...");
-
 	int errors = 0 ;
-	errors +=_test_iclass_key_permutation();
+    prnlog("[+] Testing hash1...");
+    errors += _testHash1();
+    prnlog("[+] Testing key diversification ...");
+    errors +=_test_iclass_key_permutation();
 	errors += _testBruteforce();
+
 	return errors;
 
 }