/* kcrypt_fp.c
 * 暗号化・復号のサンプル
 */

#define USAGE "Usage: kcrypt <cipher_alg> <enc | dec> <input_file> <output_file>"
/*
cipher_alg = "camellia-128-cbc"
*/


#include <stdio.h>
#include <string.h>
#include <openssl/evp.h>
/*
#include <openssl/err.h>
#include <openssl/crypto.h>
*/

#include "mycipher_fp.h"

int main (int ac, char **av) {
  
  
  char *cipher_alg = NULL;
  char *encdec = NULL;
  char *input_file = NULL;
  char *output_file = NULL;
  int enc = 0;
  
  if (ac < 5) {
    fprintf(stderr, "%s\n", USAGE);
    goto _ERROR_;
  }
  
  cipher_alg = av[1];
  encdec = av[2];
  input_file = av[3];
  output_file = av[4];
  
  if (!strcmp(encdec, "enc")) {
    enc = 1;
  }
  
  if (1) {
    FILE *fpin = NULL;
    FILE *fpout = NULL;
  
    /* メモ：鍵やＩＶは乱数にするのが普通だけど…。 */

    if (!(fopen_s(&fpin, input_file, "rb")) && !(fopen_s(&fpout, output_file, "wb"))) {
      if (enc) {
        kencrypt_from_FP_to_FP(cipher_alg, "0123456789ABCDEF", 16, "This is a pencil", 16, fpin, fpout);
      } else {
        kdecrypt_from_FP_to_FP(cipher_alg, "0123456789ABCDEF", 16, "This is a pencil", 16, fpin, fpout);
      }
    
      fclose(fpout);
      fclose(fpin);
    }
  }
  
  printf("\ndone.\n");

  return 0; /* 正常終了 */
  
  _ERROR_:

  fprintf(stderr, "failed!\n");

  return 1; /* 異常終了 */

} /* end of main */