24fe7ba0d9
- add __unused where appropriate
- PAM_RETURN -> return since OpenPAM already logs the return value.
- make PAM_LOG use openpam_log()
- make PAM_VERBOSE_ERROR use openpam_get_option() and check flags
for PAM_SILENT
- remove dummy functions since OpenPAM handles missing service
functions
- fix various warnings
Sponsored by: DARPA, NAI Labs
90 lines
2.9 KiB
C
90 lines
2.9 KiB
C
/*-
|
|
* Copyright (c) 2001 Mark R V Murray
|
|
* All rights reserved.
|
|
* Copyright (c) 2001,2002 Networks Associates Technology, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* Portions of this software were developed for the FreeBSD Project by
|
|
* ThinkSec AS and NAI Labs, the Security Research Division of Network
|
|
* Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035
|
|
* ("CBOSS"), as part of the DARPA CHATS research program.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. The name of the author may not be used to endorse or promote
|
|
* products derived from this software without specific prior written
|
|
* permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#define _BSD_SOURCE
|
|
|
|
#include <pwd.h>
|
|
#include <unistd.h>
|
|
#include <syslog.h>
|
|
|
|
#define PAM_SM_AUTH
|
|
|
|
#include <security/pam_appl.h>
|
|
#include <security/pam_modules.h>
|
|
#include <security/pam_mod_misc.h>
|
|
|
|
#define OPT_ALLOW_ROOT "allow_root"
|
|
|
|
PAM_EXTERN int
|
|
pam_sm_authenticate(pam_handle_t *pamh, int flags __unused,
|
|
int argc __unused, const char *argv[] __unused)
|
|
{
|
|
struct passwd *pwd;
|
|
const char *luser;
|
|
int pam_err;
|
|
uid_t uid;
|
|
|
|
pam_err = pam_get_user(pamh, &luser, NULL);
|
|
if (pam_err != PAM_SUCCESS)
|
|
return (pam_err);
|
|
if (luser == NULL || (pwd = getpwnam(luser)) == NULL)
|
|
return (PAM_AUTH_ERR);
|
|
|
|
uid = getuid();
|
|
if (uid == 0 && !openpam_get_option(pamh, OPT_ALLOW_ROOT))
|
|
return (PAM_AUTH_ERR);
|
|
|
|
if (uid == (uid_t)pwd->pw_uid)
|
|
return (PAM_SUCCESS);
|
|
|
|
PAM_VERBOSE_ERROR("Refused; source and target users differ");
|
|
|
|
return (PAM_AUTH_ERR);
|
|
}
|
|
|
|
PAM_EXTERN int
|
|
pam_sm_setcred(pam_handle_t *pamh __unused, int flags __unused,
|
|
int argc __unused, const char *argv[] __unused)
|
|
{
|
|
|
|
return (PAM_SUCCESS);
|
|
}
|
|
|
|
PAM_MODULE_ENTRY("pam_self");
|