3fcf3dd63a
when it could not determine the source of the user's passwd(5) entry, it might be somewhat confusing now that we can have sources that are not compiled into libc.
165 lines
4.4 KiB
C
165 lines
4.4 KiB
C
/*-
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* Copyright (c) 2002 Networks Associates Technologies, Inc.
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* All rights reserved.
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*
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* This software was developed for the FreeBSD Project by ThinkSec AS and
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* NAI Labs, the Security Research Division of Network Associates, Inc.
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* under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
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* 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. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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#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 <pwd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <syslog.h>
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#include <unistd.h>
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#include <security/pam_appl.h>
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#include <security/openpam.h>
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static pam_handle_t *pamh;
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static struct pam_conv pamc = {
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openpam_ttyconv,
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NULL
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};
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static char *yp_domain;
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static char *yp_host;
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static void
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usage(void)
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{
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fprintf(stderr, "usage: passwd [-ly] [-d domain] [-h host] [user]\n");
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exit(1);
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}
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int
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main(int argc, char *argv[])
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{
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char hostname[MAXHOSTNAMELEN];
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struct passwd *pwd;
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int o, pam_err;
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uid_t uid;
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while ((o = getopt(argc, argv, "d:h:loy")) != -1)
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switch (o) {
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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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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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uid = getuid();
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switch (argc) {
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case 0:
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if ((pwd = getpwuid(uid)) == NULL)
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errx(1, "who are you?");
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break;
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case 1:
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if ((pwd = getpwnam(*argv)) == NULL)
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errx(1, "%s: no such user", *argv);
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break;
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default:
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usage();
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}
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if (uid != 0 && uid != pwd->pw_uid)
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errx(1, "permission denied");
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/* check where the user's from */
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switch (pwd->pw_fields & _PWF_SOURCE) {
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case _PWF_FILES:
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fprintf(stderr, "Changing local password for %s\n",
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pwd->pw_name);
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break;
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case _PWF_NIS:
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fprintf(stderr, "Changing NIS password for %s\n",
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pwd->pw_name);
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break;
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default:
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/* XXX: Green men ought to be supported via PAM. */
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errx(1,
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"Sorry, `passwd' can only change passwords for local or NIS users.");
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}
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#define pam_check(func) do { \
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if (pam_err != PAM_SUCCESS) { \
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if (pam_err == PAM_AUTH_ERR || pam_err == PAM_PERM_DENIED || \
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pam_err == PAM_AUTHTOK_RECOVERY_ERR) \
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warnx("sorry"); \
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else \
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warnx("%s(): %s", func, pam_strerror(pamh, pam_err)); \
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goto end; \
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} \
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} while (0)
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/* initialize PAM */
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pam_err = pam_start("passwd", pwd->pw_name, &pamc, &pamh);
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pam_check("pam_start");
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pam_err = pam_set_item(pamh, PAM_TTY, ttyname(STDERR_FILENO));
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pam_check("pam_set_item");
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gethostname(hostname, sizeof hostname);
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pam_err = pam_set_item(pamh, PAM_RHOST, hostname);
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pam_check("pam_set_item");
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pam_err = pam_set_item(pamh, PAM_RUSER, getlogin());
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pam_check("pam_set_item");
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/* set YP domain and host */
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pam_err = pam_set_data(pamh, "yp_domain", yp_domain, NULL);
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pam_check("pam_set_data");
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pam_err = pam_set_data(pamh, "yp_server", yp_host, NULL);
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pam_check("pam_set_data");
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/* set new password */
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pam_err = pam_chauthtok(pamh, 0);
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pam_check("pam_chauthtok");
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end:
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pam_end(pamh, pam_err);
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exit(pam_err == PAM_SUCCESS ? 0 : 1);
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}
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