d5034d7375
pw_equal does not check crypted password field, so one cannot change crypted password keeping other fields intact. Approved by: des MCF after: 3 days
303 lines
7.1 KiB
C
303 lines
7.1 KiB
C
/*-
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* Copyright (c) 1988, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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* Copyright (c) 2002 Networks Associates Technology, Inc.
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* All rights reserved.
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*
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* Portions of this software were developed for the FreeBSD Project by
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* ThinkSec AS and NAI Labs, the Security Research Division of Network
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* Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035
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* ("CBOSS"), as part of the DARPA CHATS research program.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if 0
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1988, 1993, 1994\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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static char sccsid[] = "@(#)chpass.c 8.4 (Berkeley) 4/2/94";
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#endif /* not lint */
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <err.h>
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#include <errno.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#ifdef YP
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#include <ypclnt.h>
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#endif
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#include <pw_scan.h>
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#include <libutil.h>
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#include "chpass.h"
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int master_mode;
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static void baduser(void);
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static void usage(void);
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int
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main(int argc, char *argv[])
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{
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enum { NEWSH, LOADENTRY, EDITENTRY, NEWPW, NEWEXP } op;
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struct passwd lpw, *old_pw, *pw;
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int ch, pfd, tfd;
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const char *password;
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char *arg = NULL;
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uid_t uid;
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#ifdef YP
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struct ypclnt *ypclnt;
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const char *yp_domain = NULL, *yp_host = NULL;
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#endif
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pw = old_pw = NULL;
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op = EDITENTRY;
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#ifdef YP
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while ((ch = getopt(argc, argv, "a:p:s:e:d:h:loy")) != -1)
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#else
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while ((ch = getopt(argc, argv, "a:p:s:e:")) != -1)
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#endif
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switch (ch) {
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case 'a':
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op = LOADENTRY;
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arg = optarg;
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break;
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case 's':
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op = NEWSH;
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arg = optarg;
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break;
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case 'p':
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op = NEWPW;
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arg = optarg;
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break;
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case 'e':
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op = NEWEXP;
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arg = optarg;
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break;
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#ifdef YP
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case 'd':
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yp_domain = optarg;
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break;
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case 'h':
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yp_host = optarg;
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break;
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case 'l':
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case 'o':
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case 'y':
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/* compatibility */
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break;
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#endif
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (argc > 1)
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usage();
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uid = getuid();
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if (op == EDITENTRY || op == NEWSH || op == NEWPW || op == NEWEXP) {
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if (argc == 0) {
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if ((pw = getpwuid(uid)) == NULL)
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errx(1, "unknown user: uid %lu",
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(unsigned long)uid);
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} else {
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if ((pw = getpwnam(*argv)) == NULL)
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errx(1, "unknown user: %s", *argv);
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if (uid != 0 && uid != pw->pw_uid)
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baduser();
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}
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/* Make a copy for later verification */
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if ((pw = pw_dup(pw)) == NULL ||
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(old_pw = pw_dup(pw)) == NULL)
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err(1, "pw_dup");
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}
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#ifdef YP
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if (pw != NULL && (pw->pw_fields & _PWF_SOURCE) == _PWF_NIS) {
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ypclnt = ypclnt_new(yp_domain, "passwd.byname", yp_host);
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master_mode = (ypclnt != NULL &&
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ypclnt_connect(ypclnt) != -1 &&
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ypclnt_havepasswdd(ypclnt) == 1);
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ypclnt_free(ypclnt);
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} else
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#endif
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master_mode = (uid == 0);
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if (op == NEWSH) {
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/* protect p_shell -- it thinks NULL is /bin/sh */
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if (!arg[0])
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usage();
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if (p_shell(arg, pw, (ENTRY *)NULL) == -1)
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exit(1);
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}
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if (op == NEWEXP) {
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if (uid) /* only root can change expire */
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baduser();
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if (p_expire(arg, pw, (ENTRY *)NULL) == -1)
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exit(1);
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}
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if (op == LOADENTRY) {
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if (uid)
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baduser();
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pw = &lpw;
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old_pw = NULL;
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if (!__pw_scan(arg, pw, _PWSCAN_WARN|_PWSCAN_MASTER))
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exit(1);
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}
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if (op == NEWPW) {
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if (uid)
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baduser();
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if (strchr(arg, ':'))
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errx(1, "invalid format for password");
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pw->pw_passwd = arg;
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}
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if (op == EDITENTRY) {
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/*
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* We don't really need pw_*() here, but pw_edit() (used
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* by edit()) is just too useful...
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*/
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if (pw_init(NULL, NULL))
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err(1, "pw_init()");
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if ((tfd = pw_tmp(-1)) == -1) {
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pw_fini();
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err(1, "pw_tmp()");
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}
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free(pw);
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pw = edit(pw_tempname(), old_pw);
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pw_fini();
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if (pw == NULL)
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err(1, "edit()");
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/*
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* pw_equal does not check for crypted passwords, so we
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* should do it explicitly
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*/
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if (pw_equal(old_pw, pw) &&
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strcmp(old_pw->pw_passwd, pw->pw_passwd) == 0)
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errx(0, "user information unchanged");
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}
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if (old_pw && !master_mode) {
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password = getpass("Password: ");
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if (strcmp(crypt(password, old_pw->pw_passwd),
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old_pw->pw_passwd) != 0)
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baduser();
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} else {
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password = "";
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}
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if (old_pw != NULL)
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pw->pw_fields |= (old_pw->pw_fields & _PWF_SOURCE);
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switch (pw->pw_fields & _PWF_SOURCE) {
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#ifdef YP
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case _PWF_NIS:
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ypclnt = ypclnt_new(yp_domain, "passwd.byname", yp_host);
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if (ypclnt == NULL ||
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ypclnt_connect(ypclnt) == -1 ||
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ypclnt_passwd(ypclnt, pw, password) == -1) {
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warnx("%s", ypclnt->error);
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ypclnt_free(ypclnt);
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exit(1);
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}
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ypclnt_free(ypclnt);
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errx(0, "NIS user information updated");
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#endif /* YP */
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case 0:
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case _PWF_FILES:
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if (pw_init(NULL, NULL))
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err(1, "pw_init()");
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if ((pfd = pw_lock()) == -1) {
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pw_fini();
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err(1, "pw_lock()");
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}
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if ((tfd = pw_tmp(-1)) == -1) {
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pw_fini();
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err(1, "pw_tmp()");
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}
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if (pw_copy(pfd, tfd, pw, old_pw) == -1) {
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pw_fini();
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err(1, "pw_copy");
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}
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if (pw_mkdb(pw->pw_name) == -1) {
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pw_fini();
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err(1, "pw_mkdb()");
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}
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pw_fini();
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errx(0, "user information updated");
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break;
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default:
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errx(1, "unsupported passwd source");
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}
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}
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static void
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baduser(void)
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{
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errx(1, "%s", strerror(EACCES));
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}
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static void
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usage(void)
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{
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(void)fprintf(stderr,
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"usage: chpass%s %s [user]\n",
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#ifdef YP
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" [-d domain] [-h host]",
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#else
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"",
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#endif
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"[-a list] [-p encpass] [-s shell] [-e mmm dd yy]");
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exit(1);
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}
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