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/* $OpenBSD: local_passwd.c,v 1.14 2001/06/18 21:09:23 millert Exp $ */
/*-
* Copyright (c) 1990 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.
*/
#ifndef lint
/*static char sccsid[] = "from: @(#)local_passwd.c 5.5 (Berkeley) 5/6/91";*/
static char rcsid[] = "$OpenBSD: local_passwd.c,v 1.14 2001/06/18 21:09:23 millert Exp $";
#endif /* not lint */
#include <sys/types.h>
#include <sys/stat.h>
#include <pwd.h>
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <ctype.h>
#include <fcntl.h>
#include <util.h>
#include <login_cap.h>
static uid_t uid;
extern int pwd_gensalt __P((char *, int, struct passwd *, login_cap_t *, char));
extern int pwd_check __P((struct passwd *, login_cap_t *, char *));
extern int pwd_gettries __P((struct passwd *, login_cap_t *));
char *getnewpasswd __P((struct passwd *, login_cap_t *, int));
int
local_passwd(uname, authenticated)
char *uname;
int authenticated;
{
struct passwd *pw;
login_cap_t *lc;
int pfd, tfd;
time_t period;
if (!(pw = getpwnam(uname))) {
#ifdef YP
extern int use_yp;
if (!use_yp)
#endif
warnx("unknown user %s.", uname);
return(1);
}
if ((lc = login_getclass(pw->pw_class)) == NULL) {
warnx("unable to get login class for user %s.", uname);
return(1);
}
uid = authenticated ? pw->pw_uid : getuid();
if (uid && uid != pw->pw_uid) {
warnx("login/uid mismatch, username argument required.");
return(1);
}
pw_init();
tfd = pw_lock(0);
if (tfd < 0) {
if (errno == EEXIST)
errx(1, "the passwd file is busy.");
else
err(1, "can't open passwd temp file");
}
pfd = open(_PATH_MASTERPASSWD, O_RDONLY, 0);
if (pfd < 0 || fcntl(pfd, F_SETFD, 1) == -1)
pw_error(_PATH_MASTERPASSWD, 1, 1);
/* Get the new password. */
pw->pw_passwd = getnewpasswd(pw, lc, authenticated);
/* Reset password change time based on login.conf. */
period = login_getcaptime(lc, "passwordtime", 0, 0);
if (period > 0)
pw->pw_change = time(NULL) + period;
else
pw->pw_change = 0;
/* Update master.passwd file and build .db version. */
pw_copy(pfd, tfd, pw);
if (pw_mkdb(uname) < 0)
pw_error((char *)NULL, 0, 1);
return(0);
}
char *
getnewpasswd(pw, lc, authenticated)
struct passwd *pw;
login_cap_t *lc;
int authenticated;
{
register char *p;
int tries, pwd_tries;
char buf[_PASSWORD_LEN+1], salt[_PASSWORD_LEN];
if (!authenticated) {
(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);
}
}
pwd_tries = pwd_gettries(pw, lc);
for (buf[0] = '\0', tries = 0;;) {
p = getpass("New password:");
if (!*p) {
(void)printf("Password unchanged.\n");
pw_error(NULL, 0, 0);
}
if (strcmp(p, "s/key") == 0) {
printf("That password collides with a system feature. Choose another.\n");
continue;
}
if ((tries++ < pwd_tries || pwd_tries == 0)
&& pwd_check(pw, lc, p) == 0)
continue;
strlcpy(buf, p, sizeof(buf));
if (!strcmp(buf, getpass("Retype new password:")))
break;
(void)printf("Mismatch; try again, EOF to quit.\n");
}
if (!pwd_gensalt(salt, _PASSWORD_LEN, pw, lc, 'l')) {
(void)printf("Couldn't generate salt.\n");
pw_error(NULL, 0, 0);
}
return(crypt(buf, salt));
}
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