340 lines
7.9 KiB
C
340 lines
7.9 KiB
C
/* $NetBSD: local_passwd.c,v 1.36 2012/03/25 05:55:07 dholland 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. 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 1.36 2012/03/25 05:55:07 dholland 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 <limits.h>
|
|
#include <time.h>
|
|
#include <unistd.h>
|
|
#include <util.h>
|
|
#include <login_cap.h>
|
|
#include <syslog.h>
|
|
|
|
#include "extern.h"
|
|
|
|
static uid_t uid;
|
|
|
|
static char *
|
|
getnewpasswd(struct passwd *pw, int min_pw_len)
|
|
{
|
|
int tries;
|
|
char *p, *t;
|
|
char buf[_PASSWORD_LEN+1], salt[_PASSWORD_LEN+1];
|
|
char option[LINE_MAX], *key, *opt;
|
|
|
|
(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;
|
|
syslog(LOG_AUTH | LOG_NOTICE,
|
|
"user %s (UID %lu) failed to change the "
|
|
"local password of user %s: %m",
|
|
pw->pw_name, (unsigned long)uid, pw->pw_name);
|
|
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 && (int)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((unsigned char)*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)strlcpy(buf, p, sizeof(buf));
|
|
if (!strcmp(buf, getpass("Retype new password:")))
|
|
break;
|
|
(void)printf("Mismatch; try again, EOF to quit.\n");
|
|
}
|
|
|
|
pw_getpwconf(option, sizeof(option), pw, "localcipher");
|
|
opt = option;
|
|
key = strsep(&opt, ",");
|
|
if(pw_gensalt(salt, _PASSWORD_LEN, key, opt) == -1) {
|
|
warn("Couldn't generate salt");
|
|
pw_error(NULL, 0, 0);
|
|
}
|
|
return(crypt(buf, salt));
|
|
}
|
|
|
|
#ifdef USE_PAM
|
|
|
|
void
|
|
pwlocal_usage(const char *prefix)
|
|
{
|
|
|
|
(void) fprintf(stderr, "%s %s [-d files | -l] [user]\n",
|
|
prefix, getprogname());
|
|
}
|
|
|
|
void
|
|
pwlocal_process(const char *username, int argc, char **argv)
|
|
{
|
|
struct passwd *pw;
|
|
struct passwd old_pw;
|
|
time_t old_change;
|
|
int pfd, tfd;
|
|
int min_pw_len = 0;
|
|
int pw_expiry = 0;
|
|
int ch;
|
|
#ifdef LOGIN_CAP
|
|
login_cap_t *lc;
|
|
#endif
|
|
|
|
while ((ch = getopt(argc, argv, "l")) != -1) {
|
|
switch (ch) {
|
|
case 'l':
|
|
/*
|
|
* Aborb the -l that may have gotten us here.
|
|
*/
|
|
break;
|
|
|
|
default:
|
|
usage();
|
|
/* NOTREACHED */
|
|
}
|
|
}
|
|
|
|
argc -= optind;
|
|
argv += optind;
|
|
|
|
switch (argc) {
|
|
case 0:
|
|
/* username already provided */
|
|
break;
|
|
case 1:
|
|
username = argv[0];
|
|
break;
|
|
default:
|
|
usage();
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
if (!(pw = getpwnam(username)))
|
|
errx(1, "unknown user %s", username);
|
|
|
|
uid = getuid();
|
|
if (uid && uid != pw->pw_uid)
|
|
errx(1, "%s", strerror(EACCES));
|
|
|
|
/* 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)) != NULL) {
|
|
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(username, old_change == pw->pw_change) < 0)
|
|
pw_error(NULL, 0, 1);
|
|
|
|
syslog(LOG_AUTH | LOG_INFO,
|
|
"user %s (UID %lu) successfully changed "
|
|
"the local password of user %s",
|
|
uid ? username : "root", (unsigned long)uid, username);
|
|
}
|
|
|
|
#else /* ! USE_PAM */
|
|
|
|
static int force_local;
|
|
|
|
int
|
|
local_init(const char *progname)
|
|
{
|
|
force_local = 0;
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
local_arg(char ch, const char *arg)
|
|
{
|
|
switch (ch) {
|
|
case 'l':
|
|
force_local = 1;
|
|
break;
|
|
default:
|
|
return(0);
|
|
}
|
|
return(1);
|
|
}
|
|
|
|
int
|
|
local_arg_end(void)
|
|
{
|
|
if (force_local)
|
|
return(PW_USE_FORCE);
|
|
return(PW_USE);
|
|
}
|
|
|
|
void
|
|
local_end(void)
|
|
{
|
|
/* NOOP */
|
|
}
|
|
|
|
int
|
|
local_chpw(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(NULL, 0, 1);
|
|
|
|
syslog(LOG_AUTH | LOG_INFO,
|
|
"user %s (UID %lu) successfully changed "
|
|
"the local password of user %s",
|
|
uid ? uname : "root", (unsigned long)uid, uname);
|
|
|
|
return (0);
|
|
}
|
|
|
|
#endif /* USE_PAM */
|