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Add a pam_rhosts module, loosely based on code submitted by Danny Braniss.

Browse source 
Submitted by:	Danny Braniss <danny@cs.huji.ac.il>
Sponsored by:	DARPA, NAI Labs
This commit is contained in:
Dag-Erling Smørgrav 2002-04-12 20:10:18 +00:00
parent fd994fa945
commit 95ca4cb3f6
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=94551
4 changed files with 196 additions and 0 deletions
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1
lib/libpam/modules/modules.inc
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@ -17,6 +17,7 @@ MODULES += pam_opieaccess
#MODULES += pam_passwdqc
MODULES += pam_permit
MODULES += pam_radius
MODULES += pam_rhosts
MODULES += pam_rootok
MODULES += pam_securetty
MODULES += pam_self

7
lib/libpam/modules/pam_rhosts/Makefile Normal file
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@ -0,0 +1,7 @@
# $FreeBSD$
LIB= pam_rhosts
SRCS= pam_rhosts.c
MAN= pam_rhosts.8
.include <bsd.lib.mk>

95
lib/libpam/modules/pam_rhosts/pam_rhosts.8 Normal file
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@ -0,0 +1,95 @@
.\" Copyright (c) 2001 Mark R V Murray
.\" All rights reserved.
.\" Copyright (c) 2001 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.
.\"
.\" $FreeBSD$
.\"
.Dd December 5, 2001
.Dt PAM_RHOSTS 8
.Os
.Sh NAME
.Nm pam_rhosts
.Nd Rhosts PAM module
.Sh SYNOPSIS
.Op Ar service-name
.Ar module-type
.Ar control-flag
.Pa pam_rhosts
.Op Ar options
.Sh DESCRIPTION
The rhosts authentication service module for PAM,
.Nm
provides functionality for only one PAM category:
authentication.
In terms of the
.Ar module-type
parameter, this is the
.Dq Li auth
feature.
.Ss Rhosts Authentication Module
The Rhosts authentication component
.Pq Fn pam_sm_authenticate ,
returns success if and only if the target user's UID is not 0 and the
remote host and user are listed in
.Pa /etc/hosts.equiv
or in the target user's
.Pa ~/.rhosts .
.Pp
The following options may be passed to the authentication module:
.Bl -tag -width ".Cm allow_root"
.It Cm debug
.Xr syslog 3
debugging information at
.Dv LOG_DEBUG
level.
.It Cm no_warn
suppress warning messages to the user.
These messages include reasons why the user's authentication attempt
was declined.
.It Cm allow_root
do not automatically fail if the target user's UID is 0.
.El
.Sh SEE ALSO
.Xr hosts.equiv 5 ,
.Xr pam.conf 5 ,
.Xr pam 8
.Sh AUTHORS
The
.Nm
module and this manual page were developed for the
.Fx
Project by
ThinkSec AS and NAI Labs, the Security Research Division of Network
Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035
.Pq Dq CBOSS ,
as part of the DARPA CHATS research program.

93
lib/libpam/modules/pam_rhosts/pam_rhosts.c Normal file
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@ -0,0 +1,93 @@
/*-
* Copyright (c) 2002 Danny Braniss
* 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("$FreeBSD$");
#include <pwd.h>
#include <stddef.h>
#include <unistd.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 *pw;
const char *user, *ruser, *rhost;
int err, superuser;
err = pam_get_user(pamh, &user, NULL);
if (err != PAM_SUCCESS)
return (err);
if ((pw = getpwnam(user)) == NULL)
return (PAM_USER_UNKNOWN);
if (pw->pw_uid == 0 &&
openpam_get_option(pamh, OPT_ALLOW_ROOT) == NULL)
return (PAM_AUTH_ERR);
err = pam_get_item(pamh, PAM_RUSER, (const void **)&ruser);
if (err != PAM_SUCCESS)
return (PAM_AUTH_ERR);
err = pam_get_item(pamh, PAM_RHOST, (const void **)&rhost);
if (err != PAM_SUCCESS)
return (PAM_AUTH_ERR);
superuser = (strcmp(user, "root") == 0);
err = ruserok(rhost, superuser, ruser, user);
if (err != 0)
return (PAM_AUTH_ERR);
return (PAM_SUCCESS);
}
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_rhosts");