ADD: first try to implement crc-16 for Legic Advant *not working yet* Can't verify it.

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

diff --git a/client/loclass/elite_crack.c b/client/loclass/elite_crack.c
index 1a464b6cd8c05225b56d090ec50a144edd301103..a282ec5022f07b3b16ddc0173451d55cce7cf9c5 100644 (file)
--- a/client/loclass/elite_crack.c
+++ b/client/loclass/elite_crack.c
@@ -1,3 +1,41 @@
+/*****************************************************************************
+ * 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.
+ *
+ * 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>
@@ -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;
@@ -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)
                {
@@ -484,8 +522,8 @@ 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 );
+       t1 = clock() - t1;
+       float diff = ((float)t1 / CLOCKS_PER_SEC );
        prnlog("\nPerformed full crack in %f seconds",diff);
 
        // Pick out the first 16 bytes of the keytable.
@@ -525,15 +563,24 @@ int bruteforceFile(const char *filename, uint16_t keytable[])
        long fsize = ftell(f);
        fseek(f, 0, SEEK_SET);
 
+       if (fsize < 0) {
+               prnlog("Error, when getting filesize");
+               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);
+
+       uint8_t res = bruteforceDump(dump,fsize,keytable);
+       free(dump);
+       return res;
 }
 /**
  *
@@ -577,9 +624,18 @@ 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 +669,21 @@ 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 +716,13 @@ 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;
 
 }