crypt.c
author Markus Bröker <mbroeker@largo.dyndns.tv>
Mon, 07 Jun 2010 23:20:47 +0200
changeset 132 54a04f5f141d
parent 131 b5ad49852adc
permissions -rw-r--r--
Adjusted to show side effects and their handling When dealing with static buffers, successive calls point to the same memory location and overwrite formers ones... committer: Markus Bröker <mbroeker@largo.homelinux.org>

/**
 * crypt.c
 * Copyright (C) 2008 Markus Broeker
 */

#define _XOPEN_SOURCE 500

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

#define GETRANDOM(max) ('a'+(int)((float)(max)*rand()/RAND_MAX+1.0))

int main (int argc, char **argv)
{
    char salt[12] = { 0 };

    if (argc != 2) {
        printf ("Usage: %s <plaintext>\n", argv[0]);
        return EXIT_FAILURE;
    }

    srand (time (NULL));

    sprintf (salt, "$1$%c%c%c%c%c%c%c%c",
             GETRANDOM (26), GETRANDOM (26),
             GETRANDOM (26), GETRANDOM (26), GETRANDOM (26), GETRANDOM (26), GETRANDOM (26), GETRANDOM (26));

    printf ("%s\n", crypt (argv[1], salt));
    return EXIT_SUCCESS;
}