lib/pam_module/pam_opieaccess/pam_opieaccess.c

   1 /*-
   2  * Copyright (c) 2002 Networks Associates Technology, Inc.
   3  * All rights reserved.
   4  *
   5  * This software was developed for the FreeBSD Project by ThinkSec AS and
   6  * NAI Labs, the Security Research Division of Network Associates, Inc.
   7  * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
   8  * DARPA CHATS research program.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. The name of the author may not be used to endorse or promote
  19  *    products derived from this software without specific prior written
  20  *    permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  * $FreeBSD: src/lib/libpam/modules/pam_opieaccess/pam_opieaccess.c,v 1.16 2004/02/10 20:42:33 cperciva Exp $
  35  * $DragonFly: src/lib/pam_module/pam_opieaccess/pam_opieaccess.c,v 1.1 2005/07/12 23:08:53 joerg Exp $
  36  */
  37
  38 #define _BSD_SOURCE
  39
  40 #include <sys/types.h>
  41 #include <opie.h>
  42 #include <pwd.h>
  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         struct opie opie;
  57         struct passwd *pwent;
  58         const void *luser, *rhost;
  59         int r;
  60
  61         r = pam_get_item(pamh, PAM_USER, &luser);
  62         if (r != PAM_SUCCESS)
  63                 return (r);
  64         if (luser == NULL)
  65                 return (PAM_SERVICE_ERR);
  66
  67         pwent = getpwnam(luser);
  68         if (pwent == NULL || opielookup(&opie, __DECONST(char *, luser)) != 0)
  69                 return (PAM_SUCCESS);
  70
  71         r = pam_get_item(pamh, PAM_RHOST, &rhost);
  72         if (r != PAM_SUCCESS)
  73                 return (r);
  74         if (rhost == NULL || *(const char *)rhost == '\0')
  75                 rhost = openpam_get_option(pamh, "allow_local") ?
  76                     "" : "localhost";
  77
  78         if (opieaccessfile(__DECONST(char *, rhost)) != 0 &&
  79             opiealways(pwent->pw_dir) != 0)
  80                 return (PAM_SUCCESS);
  81
  82         PAM_VERBOSE_ERROR("Refused; remote host is not in opieaccess");
  83
  84         return (PAM_AUTH_ERR);
  85 }
  86
  87 PAM_EXTERN int
  88 pam_sm_setcred(pam_handle_t *pamh __unused, int flags __unused,
  89     int argc __unused, const char *argv[] __unused)
  90 {
  91
  92         return (PAM_SUCCESS);
  93 }
  94
  95 PAM_MODULE_ENTRY("pam_opieaccess");