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95 lines
3.1 KiB
C
95 lines
3.1 KiB
C
/*-
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* Copyright (c) 2002 Danny Braniss
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* All rights reserved.
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* Copyright (c) 2001,2002 Networks Associates Technology, 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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#include <pwd.h>
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#include <stddef.h>
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#include <string.h>
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#include <unistd.h>
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#define PAM_SM_AUTH
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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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#define OPT_ALLOW_ROOT "allow_root"
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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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struct passwd *pw;
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const char *user, *ruser, *rhost;
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int err, superuser;
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err = pam_get_user(pamh, &user, NULL);
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if (err != PAM_SUCCESS)
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return (err);
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if ((pw = getpwnam(user)) == NULL)
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return (PAM_USER_UNKNOWN);
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if (pw->pw_uid == 0 &&
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openpam_get_option(pamh, OPT_ALLOW_ROOT) == NULL)
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return (PAM_AUTH_ERR);
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err = pam_get_item(pamh, PAM_RUSER, (const void **)&ruser);
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if (err != PAM_SUCCESS)
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return (PAM_AUTH_ERR);
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err = pam_get_item(pamh, PAM_RHOST, (const void **)&rhost);
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if (err != PAM_SUCCESS)
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return (PAM_AUTH_ERR);
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superuser = (strcmp(user, "root") == 0);
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err = ruserok(rhost, superuser, ruser, user);
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if (err != 0)
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return (PAM_AUTH_ERR);
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return (PAM_SUCCESS);
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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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return (PAM_SUCCESS);
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}
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PAM_MODULE_ENTRY("pam_rhosts");
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