/*
 * 
 * SecureMemory 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 <inttypes.h>
#include <stddef.h>
#include <stdio.h>
#include "cryptolib.h"
#include "util.h"
#ifdef _MSC_VER
  // avoid scanf warnings in Visual Studio
  #define _CRT_SECURE_NO_WARNINGS
  #define _CRT_SECURE_NO_DEPRECATE
#endif

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

  uint8_t    Q[8] = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00}; // Reader random
  uint8_t   Gc[8] = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00}; // Secret seed
  uint8_t   Ci[8] = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00}; // Card random (last state)
  uint8_t   Ch[8] = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00}; // Reader answer
  uint8_t Ci_1[8] = {0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00}; // Card answer

  // Various argument options
  uint64_t nGc; // Card secret
  uint64_t nCi; // Card random
  uint64_t nQ; // Reader main-random

  // Show header and help syntax
  printf("SecureMemory simulator - (c) Radboud University Nijmegen\n");
  if (argc < 4)
  {
    printf("\nsyntax: sm <Gc> <Ci> <Q>\n");
    return 1;
  }

  // Parse arguments
  sscanf(argv[1],"%016" SCNx64,&nGc); num_to_bytes(nGc,8,Gc);
  sscanf(argv[2],"%016" SCNx64,&nCi); num_to_bytes(nCi,8,Ci);
  sscanf(argv[3],"%016" SCNx64,&nQ); num_to_bytes(nQ,8,Q);

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

  printf("\nAuthentication info\n\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("\n");
  printf("  Ks: ");
  for (pos=0; pos<8; pos++)
  {
    printf("%02x ",Ci_1[pos]);
    printf("%02x ",Ch[pos]);
  }
  printf("\n\n");

  return 0;
}