NetBSD/usr.bin/passwd/local_passwd.c

225 lines
5.6 KiB
C

/* $NetBSD: local_passwd.c,v 1.24 2001/08/18 19:42:40 ad Exp $ */
/*-
* Copyright (c) 1990, 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
#if 0
static char sccsid[] = "from: @(#)local_passwd.c 8.3 (Berkeley) 4/2/94";
#else
__RCSID("$NetBSD: local_passwd.c,v 1.24 2001/08/18 19:42:40 ad Exp $");
#endif
#endif /* not lint */
#include <sys/types.h>
#include <sys/stat.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <util.h>
#include <login_cap.h>
#include "extern.h"
static char *getnewpasswd __P((struct passwd *, int));
static uid_t uid;
static int force_local;
char *tempname;
static char *
getnewpasswd(pw, min_pw_len)
struct passwd *pw;
int min_pw_len;
{
int tries;
char *p, *t;
char buf[_PASSWORD_LEN+1], salt[_PASSWORD_LEN+1];
(void)printf("Changing local password for %s.\n", pw->pw_name);
if (uid && pw->pw_passwd[0] &&
strcmp(crypt(getpass("Old password:"), pw->pw_passwd),
pw->pw_passwd)) {
errno = EACCES;
pw_error(NULL, 1, 1);
}
for (buf[0] = '\0', tries = 0;;) {
p = getpass("New password:");
if (!*p) {
(void)printf("Password unchanged.\n");
pw_error(NULL, 0, 0);
}
if (min_pw_len > 0 && strlen(p) < min_pw_len) {
(void) printf("Password is too short.\n");
continue;
}
if (strlen(p) <= 5 && ++tries < 2) {
(void)printf("Please enter a longer password.\n");
continue;
}
for (t = p; *t && islower(*t); ++t);
if (!*t && ++tries < 2) {
(void)printf("Please don't use an all-lower case "
"password.\nUnusual capitalization, "
"control characters or digits are "
"suggested.\n");
continue;
}
(void)strncpy(buf, p, sizeof(buf) - 1);
buf[sizeof(buf) - 1] = '\0';
if (!strcmp(buf, getpass("Retype new password:")))
break;
(void)printf("Mismatch; try again, EOF to quit.\n");
}
if(!pwd_gensalt(salt, _PASSWORD_LEN, pw, 'l')) {
(void)printf("Couldn't generate salt.\n");
pw_error(NULL, 0, 0);
}
return(crypt(buf, salt));
}
int
local_init(progname)
const char *progname;
{
force_local = 0;
return (0);
}
int
local_arg(char arg, const char *optarg)
{
switch (arg) {
case 'l':
force_local = 1;
break;
default:
return(0);
}
return(1);
}
int
local_arg_end()
{
if (force_local)
return(PW_USE_FORCE);
return(PW_USE);
}
void
local_end()
{
/* NOOP */
}
int
local_chpw(uname)
const char *uname;
{
struct passwd *pw;
struct passwd old_pw;
time_t old_change;
int pfd, tfd;
int min_pw_len = 0;
int pw_expiry = 0;
#ifdef LOGIN_CAP
login_cap_t *lc;
#endif
if (!(pw = getpwnam(uname))) {
warnx("unknown user %s", uname);
return (1);
}
uid = getuid();
if (uid && uid != pw->pw_uid) {
warnx("%s", strerror(EACCES));
return (1);
}
/* Save the old pw information for comparing on pw_copy(). */
old_pw = *pw;
/*
* Get class restrictions for this user, then get the new password.
*/
#ifdef LOGIN_CAP
if((lc = login_getclass(pw->pw_class))) {
min_pw_len = (int) login_getcapnum(lc, "minpasswordlen", 0, 0);
pw_expiry = (int) login_getcaptime(lc, "passwordtime", 0, 0);
login_close(lc);
}
#endif
pw->pw_passwd = getnewpasswd(pw, min_pw_len);
old_change = pw->pw_change;
pw->pw_change = pw_expiry ? pw_expiry + time(NULL) : 0;
/*
* Now that the user has given us a new password, let us
* change the database.
*/
pw_init();
tfd = pw_lock(0);
if (tfd < 0) {
warnx ("The passwd file is busy, waiting...");
tfd = pw_lock(10);
if (tfd < 0)
errx(1, "The passwd file is still busy, "
"try again later.");
}
pfd = open(_PATH_MASTERPASSWD, O_RDONLY, 0);
if (pfd < 0)
pw_error(_PATH_MASTERPASSWD, 1, 1);
pw_copy(pfd, tfd, pw, &old_pw);
if (pw_mkdb(uname, old_change == pw->pw_change) < 0)
pw_error((char *)NULL, 0, 1);
return (0);
}