DIP/src/main.c

#include <string.h>
#include <time.h>
#include "hide.h"
#include "extract.h"

/*
 *
 * header :
 * pixel 1 : taille du lsb dans les 3 derniers bits de R
 * puis 32 bits de taille de la donnée suivant le lsb
 * puis 8 bits bonus
 *
 */

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

    srand((unsigned int) time(NULL));

    if (argc > 1) {
        if (!strncmp(argv[1], "-h", 2) && argc >= 5) {
            hide_lsb(argv[2], argv[3], argv[4], (byte) ((argc == 6) ? ((byte) argv[5][0] - 48) & 7u : 0));
            return OK;
        }

        if (!strncmp(argv[1], "-e", 2) && argc >= 4) {
            extract(argv[2], argv[3]);
            return OK;
        }

        if (!strncmp(argv[1], "-c", 2) && argc >= 4) {
            clean(argv[2], argv[3]);
            return OK;
        }

        if (!strncmp(argv[1], "-i", 2) && argc >= 3) {
            byte lsb = 0;
            u32 length = 0;
            string ext = "BKMG";

            get_info(&lsb, &length, argv[2]);

            u32 human = length;

            while (human > 1000) {
                human /= 1000;
                ext++;
            }

            printf("%d bytes (%d%c) hidden in %d bit%s/channel (%d bits/px)\n", length, human, *ext, lsb,
                   (lsb > 1) ? "s" : "", lsb * 3);

            return OK;
        }
    }

    printf("DIP - a tool to hide things in PNG pictures\nwritten by astequ\n\nUsage :\n\t- hiding     :"
           " %s -h <picture.png> <data> <output.png>\n\t- extracting : %s -e <picture.png> <output.data>\n\t- cleaning"
           "   : %s -c <picture.png> <output.png>\n", argv[0], argv[0], argv[0]);

    return COMMON_ERROR;
}