diff --git a/lib/libpam/modules/modules.inc b/lib/libpam/modules/modules.inc index 2e8eb6649916..246892d5ef85 100644 --- a/lib/libpam/modules/modules.inc +++ b/lib/libpam/modules/modules.inc @@ -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 diff --git a/lib/libpam/modules/pam_rhosts/Makefile b/lib/libpam/modules/pam_rhosts/Makefile new file mode 100644 index 000000000000..57eb563898ef --- /dev/null +++ b/lib/libpam/modules/pam_rhosts/Makefile @@ -0,0 +1,7 @@ +# $FreeBSD$ + +LIB= pam_rhosts +SRCS= pam_rhosts.c +MAN= pam_rhosts.8 + +.include diff --git a/lib/libpam/modules/pam_rhosts/pam_rhosts.8 b/lib/libpam/modules/pam_rhosts/pam_rhosts.8 new file mode 100644 index 000000000000..5e26866374c1 --- /dev/null +++ b/lib/libpam/modules/pam_rhosts/pam_rhosts.8 @@ -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. diff --git a/lib/libpam/modules/pam_rhosts/pam_rhosts.c b/lib/libpam/modules/pam_rhosts/pam_rhosts.c new file mode 100644 index 000000000000..1060fc5a97c9 --- /dev/null +++ b/lib/libpam/modules/pam_rhosts/pam_rhosts.c @@ -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 +__FBSDID("$FreeBSD$"); + +#include +#include +#include + +#define PAM_SM_AUTH +#include +#include +#include + +#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");