156 lines
4.2 KiB
C
156 lines
4.2 KiB
C
/*-
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* Copyright (c) 2001 Mark R V Murray
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* All rights reserved.
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* Copyright (c) 2001 Networks Associates Technologies, 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. 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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#define _BSD_SOURCE
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#include <pwd.h>
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#include <unistd.h>
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#include <syslog.h>
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#define PAM_SM_AUTH
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#define PAM_SM_ACCOUNT
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#define PAM_SM_SESSION
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#define PAM_SM_PASSWORD
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#include <security/pam_appl.h>
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#include <security/pam_modules.h>
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#include <security/pam_mod_misc.h>
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enum {
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PAM_OPT_EVEN_ROOT = PAM_OPT_STD_MAX,
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};
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static struct opttab other_options[] = {
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{ "even_root", PAM_OPT_EVEN_ROOT },
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{ NULL, 0 }
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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, int argc, const char **argv)
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{
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struct options options;
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struct passwd *pwd;
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const char *luser;
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int pam_err;
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uid_t uid;
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pam_std_option(&options, other_options, argc, argv);
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PAM_LOG("Options processed");
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pam_err = pam_get_item(pamh, PAM_USER, (const void **)&luser);
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if (pam_err != PAM_SUCCESS)
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PAM_RETURN(pam_err);
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if (luser == NULL || (pwd = getpwnam(luser)) == NULL)
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PAM_RETURN(PAM_AUTH_ERR);
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uid = getuid();
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if (uid == 0 && !pam_test_option(&options, PAM_OPT_EVEN_ROOT, NULL))
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PAM_RETURN(PAM_AUTH_ERR);
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if (uid == (uid_t)pwd->pw_uid)
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PAM_RETURN(PAM_SUCCESS);
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PAM_VERBOSE_ERROR("Refused; source and target users differ");
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PAM_RETURN(PAM_AUTH_ERR);
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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, int argc, const char **argv)
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{
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struct options options;
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pam_std_option(&options, NULL, argc, argv);
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PAM_LOG("Options processed");
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PAM_RETURN(PAM_SUCCESS);
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}
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PAM_EXTERN int
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pam_sm_acct_mgmt(pam_handle_t *pamh __unused, int flags __unused, int argc ,const char **argv)
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{
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struct options options;
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pam_std_option(&options, NULL, argc, argv);
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PAM_LOG("Options processed");
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PAM_RETURN(PAM_IGNORE);
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}
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PAM_EXTERN int
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pam_sm_chauthtok(pam_handle_t *pamh __unused, int flags __unused, int argc, const char **argv)
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{
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struct options options;
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pam_std_option(&options, NULL, argc, argv);
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PAM_LOG("Options processed");
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PAM_RETURN(PAM_IGNORE);
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}
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PAM_EXTERN int
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pam_sm_open_session(pam_handle_t *pamh __unused, int flags __unused, int argc, const char **argv)
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{
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struct options options;
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pam_std_option(&options, NULL, argc, argv);
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PAM_LOG("Options processed");
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PAM_RETURN(PAM_IGNORE);
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}
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PAM_EXTERN int
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pam_sm_close_session(pam_handle_t *pamh __unused, int flags __unused, int argc, const char **argv)
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{
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struct options options;
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pam_std_option(&options, NULL, argc, argv);
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PAM_LOG("Options processed");
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PAM_RETURN(PAM_IGNORE);
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}
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PAM_MODULE_ENTRY("pam_self");
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