277 lines
7.8 KiB
C
277 lines
7.8 KiB
C
/* $NetBSD: passwd.c,v 1.20 2000/07/06 11:19:40 ad Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1988, 1993, 1994
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
#ifndef lint
|
|
__COPYRIGHT("@(#) Copyright (c) 1988, 1993, 1994\n\
|
|
The Regents of the University of California. All rights reserved.\n");
|
|
#endif /* not lint */
|
|
|
|
#ifndef lint
|
|
#if 0
|
|
static char sccsid[] = "from: @(#)passwd.c 8.3 (Berkeley) 4/2/94";
|
|
#else
|
|
__RCSID("$NetBSD: passwd.c,v 1.20 2000/07/06 11:19:40 ad Exp $");
|
|
#endif
|
|
#endif /* not lint */
|
|
|
|
#include <err.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <pwd.h>
|
|
|
|
#include "extern.h"
|
|
|
|
static struct pw_module_s {
|
|
const char *argv0;
|
|
const char *args;
|
|
const char *usage;
|
|
int (*pw_init) __P((const char *));
|
|
int (*pw_arg) __P((char, const char *));
|
|
int (*pw_arg_end) __P((void));
|
|
void (*pw_end) __P((void));
|
|
|
|
int (*pw_chpw) __P((const char*));
|
|
int invalid;
|
|
#define INIT_INVALID 1
|
|
#define ARG_INVALID 2
|
|
int use_class;
|
|
} pw_modules[] = {
|
|
#ifdef KERBEROS5
|
|
{ NULL, "5ku:", "[-5] [-k] [-u principal]",
|
|
krb5_init, krb5_arg, krb5_arg_end, krb5_end, krb5_chpw, 0, 0 },
|
|
{ "kpasswd", "5ku:", "[-5] [-k] [-u principal]",
|
|
krb5_init, krb5_arg, krb5_arg_end, krb5_end, krb5_chpw, 0, 0 },
|
|
#endif
|
|
#ifdef KERBEROS
|
|
{ NULL, "4ku:i:r:", "[-4] [-k] [-u user] [-i instance] [-r realm]",
|
|
krb4_init, krb4_arg, krb4_arg_end, krb4_end, krb4_chpw, 0, 0 },
|
|
{ "kpasswd", "4ku:i:r:", "[-4] [-k] [-u user] [-i instance] [-r realm]",
|
|
krb4_init, krb4_arg, krb4_arg_end, krb4_end, krb4_chpw, 0, 0 },
|
|
#endif
|
|
#ifdef YP
|
|
{ NULL, "y", "[-y]",
|
|
yp_init, yp_arg, yp_arg_end, yp_end, yp_chpw, 0, 0 },
|
|
{ "yppasswd", "", "[-y]",
|
|
yp_init, yp_arg, yp_arg_end, yp_end, yp_chpw, 0, 0 },
|
|
#endif
|
|
/* local */
|
|
{ NULL, "l", "[-l]",
|
|
local_init, local_arg, local_arg_end, local_end, local_chpw, 0, 0 },
|
|
|
|
/* terminator */
|
|
{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }
|
|
};
|
|
|
|
void usage __P((void));
|
|
|
|
extern char *__progname; /* from crt0.o */
|
|
|
|
int main __P((int, char **));
|
|
|
|
int
|
|
main(argc, argv)
|
|
int argc;
|
|
char **argv;
|
|
{
|
|
int ch;
|
|
char *username;
|
|
char optstring[64]; /* if we ever get more than 64 args, shoot me. */
|
|
const char *curopt, *optopt;
|
|
int i, j;
|
|
int valid;
|
|
int use_always;
|
|
|
|
/* allow passwd modules to do argv[0] specific processing */
|
|
use_always = 0;
|
|
valid = 0;
|
|
for (i = 0; pw_modules[i].pw_init != NULL; i++) {
|
|
pw_modules[i].invalid = 0;
|
|
if (pw_modules[i].argv0) {
|
|
/*
|
|
* If we have a module that matches this progname, be
|
|
* sure that no modules but those that match this
|
|
* progname can be used. If we have a module that
|
|
* matches against a particular progname, but does NOT
|
|
* match this one, don't use that module.
|
|
*/
|
|
if ((strcmp(__progname, pw_modules[i].argv0) == 0) &&
|
|
use_always == 0) {
|
|
for (j = 0; j < i; j++) {
|
|
pw_modules[j].invalid |= INIT_INVALID;
|
|
(*pw_modules[j].pw_end)();
|
|
}
|
|
use_always = 1;
|
|
} else if (use_always == 0)
|
|
pw_modules[i].invalid |= INIT_INVALID;
|
|
} else if (use_always)
|
|
pw_modules[i].invalid |= INIT_INVALID;
|
|
|
|
if (pw_modules[i].invalid)
|
|
continue;
|
|
|
|
pw_modules[i].invalid |= (*pw_modules[i].pw_init)(__progname) ?
|
|
/* zero on success, non-zero on error */
|
|
INIT_INVALID : 0;
|
|
|
|
if (! pw_modules[i].invalid)
|
|
valid = 1;
|
|
}
|
|
|
|
if (valid == 0)
|
|
errx(1, "Can't change password.");
|
|
|
|
/* Build the option string from the individual modules' option
|
|
* strings. Note that two modules can share a single option
|
|
* letter. */
|
|
optstring[0] = '\0';
|
|
j = 0;
|
|
for (i = 0; pw_modules[i].pw_init != NULL; i++) {
|
|
if (pw_modules[i].invalid)
|
|
continue;
|
|
|
|
curopt = pw_modules[i].args;
|
|
while (*curopt != '\0') {
|
|
if ((optopt = strchr(optstring, *curopt)) == NULL) {
|
|
optstring[j++] = *curopt;
|
|
if (curopt[1] == ':') {
|
|
curopt++;
|
|
optstring[j++] = *curopt;
|
|
}
|
|
optstring[j] = '\0';
|
|
} else if ((optopt[1] == ':' && curopt[1] != ':') ||
|
|
(optopt[1] != ':' && curopt[1] == ':')) {
|
|
errx(1, "NetBSD ERROR! Different password "
|
|
"modules have two different ideas about "
|
|
"%c argument format.", curopt[0]);
|
|
}
|
|
curopt++;
|
|
}
|
|
}
|
|
|
|
while ((ch = getopt(argc, argv, optstring)) != -1)
|
|
{
|
|
valid = 0;
|
|
for (i = 0; pw_modules[i].pw_init != NULL; i++) {
|
|
if (pw_modules[i].invalid)
|
|
continue;
|
|
if ((optopt = strchr(pw_modules[i].args, ch)) != NULL) {
|
|
j = (optopt[1] == ':') ?
|
|
! (*pw_modules[i].pw_arg)(ch, optarg) :
|
|
! (*pw_modules[i].pw_arg)(ch, NULL);
|
|
if (j != 0)
|
|
pw_modules[i].invalid |= ARG_INVALID;
|
|
if (pw_modules[i].invalid)
|
|
(*pw_modules[i].pw_end)();
|
|
} else {
|
|
/* arg doesn't match this module */
|
|
pw_modules[i].invalid |= ARG_INVALID;
|
|
(*pw_modules[i].pw_end)();
|
|
}
|
|
if (! pw_modules[i].invalid)
|
|
valid = 1;
|
|
}
|
|
if (! valid) {
|
|
usage();
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
/* select which module to use to actually change the password. */
|
|
use_always = 0;
|
|
valid = 0;
|
|
for (i = 0; pw_modules[i].pw_init != NULL; i++)
|
|
if (! pw_modules[i].invalid) {
|
|
pw_modules[i].use_class = (*pw_modules[i].pw_arg_end)();
|
|
if (pw_modules[i].use_class != PW_DONT_USE)
|
|
valid = 1;
|
|
if (pw_modules[i].use_class == PW_USE_FORCE)
|
|
use_always = 1;
|
|
}
|
|
|
|
|
|
if (! valid)
|
|
/* hang the DJ */
|
|
errx(1, "No valid password module specified.");
|
|
|
|
argc -= optind;
|
|
argv += optind;
|
|
|
|
username = getlogin();
|
|
if (username == NULL)
|
|
errx(1, "who are you ??");
|
|
|
|
switch(argc) {
|
|
case 0:
|
|
break;
|
|
case 1:
|
|
username = argv[0];
|
|
break;
|
|
default:
|
|
usage();
|
|
exit(1);
|
|
}
|
|
|
|
/* allow for fallback to other chpw() methods. */
|
|
for (i = 0; pw_modules[i].pw_init != NULL; i++) {
|
|
if (pw_modules[i].invalid)
|
|
continue;
|
|
if ((use_always && pw_modules[i].use_class == PW_USE_FORCE) ||
|
|
(!use_always && pw_modules[i].use_class == PW_USE)) {
|
|
valid = (*pw_modules[i].pw_chpw)(username);
|
|
(*pw_modules[i].pw_end)();
|
|
if (valid >= 0)
|
|
exit(valid);
|
|
/* return value < 0 indicates continuation. */
|
|
}
|
|
}
|
|
exit(1);
|
|
}
|
|
|
|
void
|
|
usage()
|
|
{
|
|
int i;
|
|
|
|
fprintf(stderr, "usage:\n");
|
|
for (i = 0; pw_modules[i].pw_init != NULL; i++)
|
|
if (! (pw_modules[i].invalid & INIT_INVALID))
|
|
fprintf(stderr, "\t%s %s [user]\n", __progname,
|
|
pw_modules[i].usage);
|
|
exit(1);
|
|
}
|