X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/f97d4e2378e04397b3c884d10acb79725dee4e06..d172c17ca459379d99ab4cf7ce8fbe097918a6b6:/client/loclass/elite_crack.c?ds=inline
diff --git a/client/loclass/elite_crack.c b/client/loclass/elite_crack.c
index 1a464b6c..e9814e95 100644
--- 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 .
+ *
+ *
+ *
+ ****************************************************************************/
+
#include
#include
#include
@@ -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 +563,23 @@ 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;
}