#include <stdio.h>
#include <string.h>
#include <openssl/rand.h>

int main(int argc, char **argv) {

    FILE *fptr;
    fptr = fopen("key.txt", "w");

    unsigned char key[16];

    if (fptr == NULL) {
        printf("Error opening file");
        return EXIT_FAILURE;
    }

    if (!RAND_bytes(key, sizeof key)) {
        return EXIT_FAILURE;
    }

    fprintf(fptr, "%s", key);
    fclose(fptr);

    // printf("%s", key)

    return 0;

}