proxmark3/tools/cryptorf/cm.c

/*
 * 
 * CryptoMemory simulation
 *
 * Copyright (C) 2010, Flavio D. Garcia, Peter van Rossum, Roel Verdult
 * and Ronny Wichers Schreur. Radboud University Nijmegen   
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 * 
 */

#include "defines.h"
#include "cryptolib.h"
#include "util.h"

int main(int argc, const char* argv[])
{
  // Cryptomemory state
  crypto_state_t s;

  // Main authentication values
  byte_t     Q[8]; // Reader key-auth random 
  byte_t    Gc[8]; // Secret seed
  byte_t    Ci[8]; // Card random (last state)
  byte_t    Ch[8]; // Reader answer (challenge)
  byte_t  Ci_1[8]; // Card answer
  byte_t  Ci_2[8]; // Session key
  
  // Session authentication values
  byte_t    Qs[8]; // Reader session-auth random
  byte_t   Chs[8]; // Reader session-answer (challenge)
  byte_t Ci_1s[8]; // Card answer for session
  byte_t Ci_2s[8]; // Is this used?

  // Various argument options
  ui64 nGc; // Card secret
  ui64 nCi; // Card random
  ui64 nQ; // Reader main-random
  ui64 nQs; // Reader session-random

  // Show header and help syntax
  printf("CryptoMemory simulator - (c) Radboud University Nijmegen\n");
  if (argc < 5)
  {
    printf("\nsyntax: cm <Gc> <Ci> <Q> <Q(s)>\n");
    return 1;
  }

  // Parse arguments
  sscanf(argv[1],"%016llx",&nGc); num_to_bytes(nGc,8,Gc);
  sscanf(argv[2],"%016llx",&nCi); num_to_bytes(nCi,8,Ci);
  sscanf(argv[3],"%016llx",&nQ); num_to_bytes(nQ,8,Q);
  sscanf(argv[4],"%016llx",&nQs); num_to_bytes(nQs,8,Qs);

  // Calculate authentication
  cm_auth(Gc,Ci,Q,Ch,Ci_1,Ci_2,&s);

  printf("\nAuthenticate\n");
  printf("     Gc: "); print_bytes(Gc,8);
  printf("     Ci: "); print_bytes(Ci,8);
  printf("      Q: "); print_bytes(Q,8);
  printf("     Ch: "); print_bytes(Ch,8);
  printf("   Ci+1: "); print_bytes(Ci_1,8);
  printf("   Ci+2: "); print_bytes(Ci_2,8);

  cm_auth(Ci_2,Ci_1,Qs,Chs,Ci_1s,Ci_2s,&s);

  printf("\nVerify Crypto (Session Key)\n");
  printf("  Gc(s): "); print_bytes(Ci_2,8);
  printf("  Ci(s): "); print_bytes(Ci_1,8);
  printf("   Q(s): "); print_bytes(Qs,8);
  printf("  Ch(s): "); print_bytes(Chs,8);
  printf("Ci+1(s): "); print_bytes(Ci_1s,8);
  printf("Ci+2(s): "); print_bytes(Ci_2s,8);

  printf("\n");
  return 0;
}