simplecrypt.c

/* Simplecrypt - Simple Gmail file obfuscator. Public domain.
 * Use for executable attachments or archives containing executables.
 * Written in 2012 by Kirn Gill II <segin2005@gmail.com>
 * Idea by Mattis Michel <sic_zer0@hotmail.com>
 */

#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>

int main(int argc, char *argv[]) {
    FILE *fd, *fd2;
    char a;
    if(argc < 2) {
        fprintf(stderr, "Not enough arguments!\n");
        exit(1);
    }
    if(!(fd = fopen(argv[1], "rb")) || !(fd2 = fopen(argv[2], "wb"))) {
        perror(argv[fd ? 2 : 1]);
        exit(1);
    }
    while(fread(&a, 1, 1, fd)) {
        a ^= 0xFF;
        fwrite(&a, 1, 1, fd2);
    }
    fclose(fd);
    fclose(fd2);
    exit(0);
}