buildroot

/*

 * Copyright (C) 2001-2008  Marco d'Itri

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 */

​

/* for crypt, snprintf and strcasecmp */

#define _XOPEN_SOURCE

#define _BSD_SOURCE

​

/* System library */

#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>

#include "config.h"

#ifdef HAVE_GETOPT_LONG

#include <getopt.h>

#endif

#include <fcntl.h>

#include <string.h>

#include <time.h>

#include <sys/types.h>

#ifdef HAVE_XCRYPT

#include <xcrypt.h>

#include <sys/stat.h>

#endif

#ifdef HAVE_LINUX_CRYPT_GENSALT

#define _OW_SOURCE

#include <crypt.h>

#endif

#ifdef HAVE_GETTIMEOFDAY

#include <sys/time.h>

#endif

​

/* Application-specific */

#include "utils.h"

​

/* Global variables */

#ifdef HAVE_GETOPT_LONG

static const struct option longopts[] = {

    {"method",      optional_argument,  NULL, 'm'},

    /* for backward compatibility with versions < 4.7.25 (< 20080321): */

    {"hash",        optional_argument,  NULL, 'H'},

    {"help",        no_argument,        NULL, 'h'},

    {"password-fd", required_argument,  NULL, 'P'},

    {"stdin",       no_argument,        NULL, 's'},

    {"salt",        required_argument,  NULL, 'S'},

    {"rounds",      required_argument,  NULL, 'R'},

    {"version",     no_argument,        NULL, 'V'},

    {NULL,      0,          NULL, 0  }

};

#else

extern char *optarg;

extern int optind;

#endif

​

static const char valid_salts[] = "abcdefghijklmnopqrstuvwxyz"

"ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789./";

​

struct crypt_method {

    const char *method;     /* short name used by the command line option */

    const char *prefix;     /* salt prefix */

    const unsigned int minlen;  /* minimum salt length */

    const unsigned int maxlen;  /* maximum salt length */

    const unsigned int rounds;  /* supports a variable number of rounds */

    const char *desc;       /* long description for the methods list */

};

​

static const struct crypt_method methods[] = {

    /* method       prefix  minlen, maxlen  rounds description */

    { "des",        "", 2,  2,  0,

    N_("standard 56 bit DES-based crypt(3)") },

    { "md5",        "$1$",  8,  8,  0, "MD5" },

#if defined OpenBSD || defined FreeBSD || (defined __SVR4 && defined __sun)

    { "bf",     "$2a$", 22, 22, 1, "Blowfish" },

#endif

#if defined HAVE_LINUX_CRYPT_GENSALT

    { "bf",     "$2a$", 22, 22, 1, "Blowfish, system-specific on 8-bit chars" },

    /* algorithm 2y fixes CVE-2011-2483 */

    { "bfy",        "$2y$", 22, 22, 1, "Blowfish, correct handling of 8-bit chars" },