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/* $MidnightBSD$ */ |
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/*- |
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* Copyright (c) 2003 Networks Associates Technology, Inc. |
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* Copyright (c) 2004-2011 Dag-Erling Smørgrav |
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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. 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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|
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#include <sys/cdefs.h> |
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__FBSDID("$FreeBSD: stable/10/lib/libpam/modules/pam_group/pam_group.c 270401 2014-08-23 11:40:40Z des $"); |
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|
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#include <sys/types.h> |
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|
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#include <grp.h> |
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#include <pwd.h> |
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#include <stdarg.h> |
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#include <stdio.h> |
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#include <string.h> |
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#include <syslog.h> |
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#include <unistd.h> |
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|
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#define PAM_SM_AUTH |
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#define PAM_SM_ACCOUNT |
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|
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#include <security/pam_appl.h> |
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#include <security/pam_modules.h> |
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#include <security/openpam.h> |
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|
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static int |
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pam_group(pam_handle_t *pamh) |
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{ |
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int local, remote; |
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const char *group, *user; |
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const void *ruser; |
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char *const *list; |
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struct passwd *pwd; |
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struct group *grp; |
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|
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/* get target account */ |
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if (pam_get_user(pamh, &user, NULL) != PAM_SUCCESS || |
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user == NULL || (pwd = getpwnam(user)) == NULL) |
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return (PAM_AUTH_ERR); |
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if (pwd->pw_uid != 0 && openpam_get_option(pamh, "root_only")) |
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return (PAM_IGNORE); |
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|
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/* check local / remote */ |
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local = openpam_get_option(pamh, "luser") ? 1 : 0; |
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remote = openpam_get_option(pamh, "ruser") ? 1 : 0; |
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if (local && remote) { |
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openpam_log(PAM_LOG_ERROR, "(pam_group) " |
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"the luser and ruser options are mutually exclusive"); |
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return (PAM_SERVICE_ERR); |
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} else if (local) { |
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/* we already have the correct struct passwd */ |
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} else { |
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if (!remote) |
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openpam_log(PAM_LOG_NOTICE, "(pam_group) " |
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"neither luser nor ruser specified, assuming ruser"); |
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/* default / historical behavior */ |
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if (pam_get_item(pamh, PAM_RUSER, &ruser) != PAM_SUCCESS || |
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ruser == NULL || (pwd = getpwnam(ruser)) == NULL) |
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return (PAM_AUTH_ERR); |
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} |
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|
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/* get regulating group */ |
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if ((group = openpam_get_option(pamh, "group")) == NULL) |
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group = "wheel"; |
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if ((grp = getgrnam(group)) == NULL || grp->gr_mem == NULL) |
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goto failed; |
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|
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/* check if user's own primary group */ |
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if (pwd->pw_gid == grp->gr_gid) |
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goto found; |
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|
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/* iterate over members */ |
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for (list = grp->gr_mem; list != NULL && *list != NULL; ++list) |
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if (strcmp(*list, pwd->pw_name) == 0) |
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goto found; |
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|
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not_found: |
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if (openpam_get_option(pamh, "deny")) |
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return (PAM_SUCCESS); |
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return (PAM_AUTH_ERR); |
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found: |
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if (openpam_get_option(pamh, "deny")) |
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return (PAM_AUTH_ERR); |
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return (PAM_SUCCESS); |
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failed: |
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if (openpam_get_option(pamh, "fail_safe")) |
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goto found; |
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else |
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goto not_found; |
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} |
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|
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PAM_EXTERN int |
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pam_sm_authenticate(pam_handle_t *pamh, int flags __unused, |
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int argc __unused, const char *argv[] __unused) |
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{ |
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|
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return (pam_group(pamh)); |
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} |
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|
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PAM_EXTERN int |
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pam_sm_setcred(pam_handle_t * pamh __unused, int flags __unused, |
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int argc __unused, const char *argv[] __unused) |
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{ |
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|
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return (PAM_SUCCESS); |
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} |
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|
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PAM_EXTERN int |
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pam_sm_acct_mgmt(pam_handle_t *pamh, int flags __unused, |
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int argc __unused, const char *argv[] __unused) |
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{ |
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|
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return (pam_group(pamh)); |
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} |
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|
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PAM_MODULE_ENTRY("pam_group"); |
