lib/libpam/modules/pam_rootok/pam_rootok.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-3-Clause
   3  *
   4  * Copyright (c) 2001 Mark R V Murray
   5  * All rights reserved.
   6  * Copyright (c) 2001 Networks Associates Technology, Inc.
   7  * All rights reserved.
   8  *
   9  * Portions of this software were developed for the FreeBSD Project by
  10  * ThinkSec AS and NAI Labs, the Security Research Division of Network
  11  * Associates, Inc.  under DARPA/SPAWAR contract N66001-01-C-8035
  12  * ("CBOSS"), as part of the DARPA CHATS research program.
  13  *
  14  * Redistribution and use in source and binary forms, with or without
  15  * modification, are permitted provided that the following conditions
  16  * are met:
  17  * 1. Redistributions of source code must retain the above copyright
  18  *    notice, this list of conditions and the following disclaimer.
  19  * 2. Redistributions in binary form must reproduce the above copyright
  20  *    notice, this list of conditions and the following disclaimer in the
  21  *    documentation and/or other materials provided with the distribution.
  22  * 3. The name of the author may not be used to endorse or promote
  23  *    products derived from this software without specific prior written
  24  *    permission.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  36  * SUCH DAMAGE.
  37  *
  38  * $FreeBSD: head/lib/libpam/modules/pam_rootok/pam_rootok.c 326219 2017-11-26 02:00:33Z pfg $
  39  */
  40
  41 #define _BSD_SOURCE
  42
  43 #include <unistd.h>
  44 #include <syslog.h>
  45
  46 #define PAM_SM_AUTH
  47
  48 #include <security/pam_appl.h>
  49 #include <security/pam_modules.h>
  50 #include <security/pam_mod_misc.h>
  51
  52 PAM_EXTERN int
  53 pam_sm_authenticate(pam_handle_t *pamh, int flags __unused,
  54     int argc __unused, const char *argv[] __unused)
  55 {
  56
  57         if (getuid() == 0)
  58                 return (PAM_SUCCESS);
  59
  60         PAM_VERBOSE_ERROR("Refused; not superuser");
  61         PAM_LOG("User is not superuser");
  62
  63         return (PAM_AUTH_ERR);
  64 }
  65
  66 PAM_EXTERN int
  67 pam_sm_setcred(pam_handle_t *pamh __unused, int flags __unused,
  68     int argc __unused, const char *argv[] __unused)
  69 {
  70
  71         return (PAM_SUCCESS);
  72 }
  73
  74 PAM_MODULE_ENTRY("pam_rootok");