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/*
* Copyright (C) 2001 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
*/
#define _XOPEN_SOURCE
#define _BSD_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "config.h"
#ifdef HAVE_GETOPT_LONG
#include <getopt.h>
#endif
#include <string.h>
#include <time.h>
#include <sys/types.h>
#ifdef HAVE_GETOPT_LONG
static struct option longopts[] = {
{"stdin", no_argument, NULL, 's'},
{"salt", required_argument, NULL, 'S'},
{"hash", required_argument, NULL, 'H'},
{"help", no_argument, NULL, 'h'},
{"version", no_argument, NULL, 'V'},
{NULL, 0, NULL, 0 }
};
#endif
static char valid_salts[] = "abcdefghijklmnopqrstuvwxyz"
"ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789./";
struct salt_prefix {
const char *algo;
const char *prefix;
unsigned int len;
};
struct salt_prefix salt_prefixes[] = {
{ "des", "", 2 },
{ "md5", "$1$", 8 },
};
void generate_salt(char *buf, const unsigned int len);
void display_help(void);
void display_version(void);
void display_algorithms(void);
int main(int argc, char *argv[])
{
int ch;
int use_stdin = 0;
unsigned int i, salt_len = 0;
const char *salt_prefix = NULL;
char *salt = NULL;
char *password = NULL;
unsigned char *p;
#ifdef ENABLE_NLS
setlocale(LC_ALL, "");
bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
textdomain(NLS_CAT_NAME);
#endif
while ((ch = GETOPT_LONGISH(argc, argv, "hH:sS:V", longopts, 0)) > 0) {
switch (ch) {
case 's':
use_stdin = 1;
break;
case 'S':
salt = optarg;
break;
case 'H':
if (!*optarg) {
display_algorithms();
exit(0);
}
for (i = 0; salt_prefixes[i].algo != NULL; i++)
if (strcasecmp(salt_prefixes[i].algo, optarg) == 0) {
salt_prefix = salt_prefixes[i].prefix;
salt_len = salt_prefixes[i].len;
break;
}
if (!salt_prefix) {
fprintf(stderr, _("Invalid hash type '%s'.\n"), optarg);
exit(1);
}
break;
case 'V':
display_version();
exit(0);
case 'h':
display_help();
exit(0);
default:
fprintf(stderr, _("Try '%s --help' for more information.\n"),
argv[0]);
exit(1);
}
}
argc -= optind;
argv += optind;
if (argc == 2 && !salt) {
password = argv[0];
salt = argv[1];
} else if (argc == 1) {
password = argv[0];
} else if (argc == 0) {
} else {
display_help();
exit(1);
}
/* default: DES password */
if (!salt_len) {
salt_len = salt_prefixes[0].len;
salt_prefix = salt_prefixes[0].prefix;
}
if (salt) {
i = strlen(salt);
if (i != salt_len) {
fprintf(stderr, _("Wrong salt length: %d byte(s) instead of %d.\n"),
i, salt_len);
exit(1);
}
while (i-- > 0)
if (strchr(valid_salts, salt[i]) == NULL) {
fprintf(stderr, _("Illegal salt character '%c'.\n"), salt[i]);
exit(1);
}
} else {
salt = malloc(salt_len + 1);
generate_salt(salt, salt_len);
}
if (!password) {
if (use_stdin) {
if (isatty(STDIN_FILENO))
fprintf(stderr, _("Password: "));
password = malloc(128);
if (!fgets(password, sizeof password, stdin)) {
perror("fgets:");
exit(2);
}
p = password;
while (*p) {
if (*p == '\n') {
*p = '\0';
break;
}
/* which characters are valid? */
if (*p > 0x7f) {
fprintf(stderr, _("Illegal password character '0x%hhx'.\n"),
*p);
exit(1);
}
p++;
}
} else {
password = getpass(_("Password: "));
if (!password) {
perror("getpass:");
exit(2);
}
}
}
p = malloc(strlen(salt_prefix) + strlen(salt) + 1);
*p = '\0';
strcat(p, salt_prefix);
strcat(p, salt);
printf("%s\n", crypt(password, p));
exit(0);
}
void generate_salt(char *buf, const unsigned int len)
{
unsigned int i;
srand(time(NULL) + getpid());
for (i = 0; i < len; i++)
buf[i] = valid_salts[rand() % (sizeof valid_salts - 1)];
buf[i] = '\0';
}
void display_help(void)
{
fprintf(stderr, _("Usage: mkpasswd [OPTIONS]... [PASSWORD [SALT]]\n"
"Crypts the PASSWORD using crypt(3).\n\n"));
fprintf(stderr, _(
" -H, --hash=TYPE select hash TYPE\n"
" -S, --salt=SALT use the specified SALT\n"
" -s, --stdin read the password from stdin instead of /dev/tty\n"
" -h, --help display this help and exit\n"
" -v, --version output version information and exit\n"
"\n"
"If PASSWORD is missing then it is asked interactively.\n"
"If no SALT is specified, a random one is generated.\n"
"\n"
"Report bugs to %s.\n"), "<md+whois@linux.it>");
}
void display_version(void)
{
printf("GNU mkpasswd %s\n\n", VERSION);
puts("Copyright (C) 2001 Marco d'Itri\n"
"This is free software; see the source for copying conditions. There is NO\n"
"warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.");
}
void display_algorithms(void)
{
printf(_("Available algorithms:\n"));
}
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