164 lines
4.4 KiB
C
164 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 <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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