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Add a pam_self authentication module that succeeds if and only if the local

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and remote user names are the same.

Sponsored by:	DARPA, NAI Labs
This commit is contained in:
des 2001-12-05 15:55:14 +00:00
parent bb8f2bd57a
commit 01dcdd1f9a
4 changed files with 257 additions and 0 deletions
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1
lib/libpam/modules/Makefile
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@ -38,6 +38,7 @@ SUBDIR+= pam_permit
SUBDIR+= pam_radius
SUBDIR+= pam_rootok
SUBDIR+= pam_securetty
SUBDIR+= pam_self
.if !defined(NOCRYPT) && !defined(NO_OPENSSL) && !defined(NO_OPENSSH)
SUBDIR+= pam_ssh
.endif

32
lib/libpam/modules/pam_self/Makefile Normal file
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@ -0,0 +1,32 @@
# Copyright 2001 Mark R V Murray
# All rights reserved.
#
# 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.
#
# 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.
#
# $FreeBSD$
LIB= pam_self
SHLIB_NAME= pam_self.so
SRCS= pam_self.c
MAN= pam_self.8
.include <bsd.lib.mk>

82
lib/libpam/modules/pam_self/pam_self.8 Normal file
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@ -0,0 +1,82 @@
.\" Copyright (c) 2001 Mark R V Murray
.\" All rights reserved.
.\" Copyright (c) 2001 Networks Associates Technologies, 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 July 8, 2001
.Dt PAM_SELF 8
.Os
.Sh NAME
.Nm pam_self
.Nd Self PAM module
.Sh SYNOPSIS
.Op Ar service-name
.Ar module-type
.Ar control-flag
.Pa pam_self
.Op Ar options
.Sh DESCRIPTION
The Self 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.
It also provides a null function for session management.
.Ss Self Authentication Module
The Self authentication component
.Pq Fn pam_sm_authenticate ,
returns success if and only if the source and target user names are
identical.
.Pp
The following options may be passed to the authentication module:
.Bl -tag -width ".Cm no_warn"
.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.
.El
.Sh SEE ALSO
.Xr getuid 2 ,
.Xr pam.conf 5 ,
.Xr pam 8

142
lib/libpam/modules/pam_self/pam_self.c Normal file
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@ -0,0 +1,142 @@
/*-
* Copyright (c) 2001 Mark R V Murray
* All rights reserved.
* Copyright (c) 2001 Networks Associates Technologies, 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 <unistd.h>
#include <syslog.h>
#define PAM_SM_AUTH
#define PAM_SM_ACCOUNT
#define PAM_SM_SESSION
#define PAM_SM_PASSWORD
#include <security/pam_modules.h>
#include <pam_mod_misc.h>
PAM_EXTERN int
pam_sm_authenticate(pam_handle_t *pamh, int flags, int argc, const char **argv)
{
struct options options;
const char *luser, *ruser;
int r;
pam_std_option(&options, NULL, argc, argv);
PAM_LOG("Options processed");
r = pam_get_item(pamh, PAM_USER, (const void **)&luser);
if (r != PAM_SUCCESS)
PAM_RETURN(r);
if (luser == NULL)
PAM_RETURN(PAM_USER_UNKNOWN);
r = pam_get_item(pamh, PAM_RUSER, (const void **)&ruser);
if (r != PAM_SUCCESS)
PAM_RETURN(r);
if (strcmp(luser, ruser) == 0)
PAM_RETURN(PAM_SUCCESS);
PAM_VERBOSE_ERROR("Refused; source and target users differ");
PAM_RETURN(PAM_AUTH_ERR);
}
PAM_EXTERN int
pam_sm_setcred(pam_handle_t *pamh, int flags, int argc, const char **argv)
{
struct options options;
pam_std_option(&options, NULL, argc, argv);
PAM_LOG("Options processed");
PAM_RETURN(PAM_SUCCESS);
}
PAM_EXTERN int
pam_sm_acct_mgmt(pam_handle_t *pamh, int flags, int argc ,const char **argv)
{
struct options options;
pam_std_option(&options, NULL, argc, argv);
PAM_LOG("Options processed");
PAM_RETURN(PAM_IGNORE);
}
PAM_EXTERN int
pam_sm_chauthtok(pam_handle_t *pamh, int flags, int argc, const char **argv)
{
struct options options;
pam_std_option(&options, NULL, argc, argv);
PAM_LOG("Options processed");
PAM_RETURN(PAM_IGNORE);
}
PAM_EXTERN int
pam_sm_open_session(pam_handle_t *pamh, int flags, int argc, const char **argv)
{
struct options options;
pam_std_option(&options, NULL, argc, argv);
PAM_LOG("Options processed");
PAM_RETURN(PAM_IGNORE);
}
PAM_EXTERN int
pam_sm_close_session(pam_handle_t *pamh, int flags, int argc, const char **argv)
{
struct options options;
pam_std_option(&options, NULL, argc, argv);
PAM_LOG("Options processed");
PAM_RETURN(PAM_IGNORE);
}
PAM_MODULE_ENTRY("pam_self");