decrypt.c

#include <stdio.h>
#include <stdbool.h>
#include <string.h>
#include "utils.h"
#include "lwe.h"

void Usage(const char* program)
{
   fprintf(stderr, "Usage: %s <publickey.pub> <privatekey.pri> <inputfile>\n", program);
}

int main(int argc, char **argv)
{
   const char *program = args_shift(&argc, &argv);
   if (argc != 1)
   {
      Usage(program);
      fprintf(stderr, "ERROR: no public key file provided\n");
      return 1;
   }

   const char *publickeyfilename = args_shift(&argc, &argv);

   if (argc != 1)
   {
      Usage(program);
      fprintf(stderr, "ERROR: no private key file provided\n");
      return 1;
   }

   const char *privatekeyfilename = args_shift(&argc, &argv);

   if (argc != 1)
   {
      Usage(program);
      fprintf(stderr, "ERROR: no inputfile provided\n");
      return 1;
   }

   const char *inputfilename = args_shift(&argc, &argv);

   printf("Reading public key %s\n", publickeyfilename);
   PublicKey* publickey = LoadPublicKey(publickeyfilename);
   if (publickey == NULL)
   {
      fprintf(stderr, "ERROR reading public key\n");
      return 1;
   }

   printf("Reading private key %s\n", privatekeyfilename);
   PrivateKey* privatekey = LoadPrivateKey(privatekeyfilename);
   if (privatekey == NULL)
   {
      fprintf(stderr, "ERROR reading private key\n");
      return 2;
   }

   printf("Decrypting\n");






   FreePrivateKey(privatekey);
   FreePublicKey(publickey);

   return 0;
}