/******************************************************
  Standard XOR Encryption By Axion
  UIN  :          35614954
  EMAIL:          axionis@hotmail.com
  DATE :          MAY 21st 2000
  USAGE:          xe filein fileout key
  *******************************************************/

#include <stdio.h>

#define PROG_NAME "xe"
void usage()
{
 printf("-------------------------------\n");
 printf("Invalid command line.\n");
 printf("Usage:\n\t%s infile outfile key\n", PROG_NAME);
 printf("-------------------------------\n");
}


int main(int argc, char *argv[])
{
   int count,bytes; /* counter when looping through file, and bytes to count filesize */
   FILE *in,*out;   /* In and out FILE Streams to read/write data */

    if(argc < 4) {  /* Error check the command line */
     usage();       /* Display Usage Information on error */
      return 0;     /* Exit Program returning 0 - no error */
      }

    if (( in = fopen(argv[1], "rb")) == NULL) /* Error Check File Streams */
     {
       printf("Error opening %s.\n", argv[1]);
     }
    if (( out = fopen(argv[2], "wb")) == NULL)
     {
       printf("Error opening %s.\n", argv[2]);
     }


       while(( count = getc(in)) != EOF) 
        {
           count = count ^ *argv[3]; /* Apply XOR  ( KEY ) */
           bytes++; 			/* Increment counter of filesize */
           putc(count, out);		/* Write new file */
        }

         fclose(in);
          fclose(out);
           printf("Encryption Success:\n");
          printf("\tEncrypted %s and stored data in %s.\n", argv[1],argv[2]);
         printf("\tWrote %d bytes to %s.\n", bytes,argv[2]);
   return 0;
}
/*  To compile under djgpp */
/*  dgjpp xe.c -o xe       */