/*
* Program Name :: Noise Encryptor/Decryptor
* Author Name :: DATA_Noise
* Organization :: Underground Systems
* Email :: DATA_Noise<at>undergroundsystems.org
* Website :: http://www.undergroundsystems.org/
* Compile :: bash$ gcc -o noise noise.c
*/
#include <stdio.h>
#include <errno.h>
static char *progname[] = { "NOISE", "noise.c", "DATA_Noise2003" };

int main(int argc, char *argv[])
{
  FILE *fpin;
  FILE *fpout;
  int count;
  int bytes;

  if (argc != 4) {
    printf("Simple Noise Encryptor/Decryptor\n");
    printf("Usage: %s <encryption/decryption file> <outfile> <key>\n", argv[0]);
    printf("Sample: %s Text.txt Text.noise s3cr3t\n", argv[0]);
    exit(-1);
  }
  if ((fpin = fopen(argv[1], "rb")) == NULL) {
    perror("fopen() failed");
    exit(-1);
  }
  if ((fpout = fopen(argv[2], "wb")) == NULL) {
    perror("fopen() failed");
    exit(-1);
  }
  while ((count = getc(fpin)) != EOF) {
    count = count ^ *argv[3];
    bytes++;
    putc(count, fpout);
  }
  fclose(fpin);
  fclose(fpout);
  printf("Encrypted %s and stored data in %s\n", argv[1], argv[2]);
  printf("Wrote %d bytes to %s\n", bytes, argv[2]);
  return 0;
}