Add pam_ftpusers(8), which enforces /etc/ftpusers.
Sponsored by: DARPA, NAI Labs
This commit is contained in:
Dag-Erling Smørgrav
parent
b2bc3101a8
commit
2256d3698a
@ -3,6 +3,7 @@
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MODULES =
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MODULES += pam_deny
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MODULES += pam_ftp
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MODULES += pam_ftpusers
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.if defined(MAKE_KERBEROS4) && !defined(NOCRYPT) && !defined(NO_OPENSSL)
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MODULES += pam_kerberosIV
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.endif
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7
lib/libpam/modules/pam_ftpusers/Makefile
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7
lib/libpam/modules/pam_ftpusers/Makefile
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# $FreeBSD$
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LIB= pam_ftpusers
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SRCS= pam_ftpusers.c
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MAN= pam_ftpusers.8
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.include <bsd.lib.mk>
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99
lib/libpam/modules/pam_ftpusers/pam_ftpusers.8
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99
lib/libpam/modules/pam_ftpusers/pam_ftpusers.8
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.\" Copyright (c) 2001 Mark R V Murray
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.\" All rights reserved.
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.\" Copyright (c) 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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.\" $FreeBSD$
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.\"
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.Dd April 17, 2002
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.Dt PAM_FTPUSERS 8
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.Os
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.Sh NAME
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.Nm pam_ftpusers
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.Nd ftpusers PAM module
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.Sh SYNOPSIS
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.Op Ar service-name
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.Ar module-type
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.Ar control-flag
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.Pa pam_ftpusers
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.Op Ar options
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.Sh DESCRIPTION
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The
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.Pa ftpusers
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service module for PAM,
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.Nm
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provides functionality for only one PAM category:
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account management.
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In terms of the
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.Ar module-type
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parameter, this is the
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.Dq Li account
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feature.
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.Ss Ftpusers Account Management Module
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The
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.Pa ftpusers
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account management component
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.Pq Fn pam_sm_acct_mgmt ,
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succeeds if and only if the user is listed in
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.Pa /etc/ftpusers .
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.Pp
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The following options may be passed to the authentication module:
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.Bl -tag -width ".Cm disallow"
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.It Cm debug
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.Xr syslog 3
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debugging information at
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.Dv LOG_DEBUG
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level.
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.It Cm no_warn
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suppress warning messages to the user.
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These messages include reasons why the user's authentication attempt
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was declined.
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.It Cm disallow
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reverse the semantics;
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.Nm
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will succeed if and only if the user is not listed in
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.Pa /etc/ftpusers .
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.El
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.Sh SEE ALSO
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.Xr ftpusers 5 ,
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.Xr pam.conf 5 ,
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.Xr pam 8
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.Sh AUTHORS
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The
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.Nm
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module and this manual page were developed for the
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.Fx
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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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.Pq Dq CBOSS ,
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as part of the DARPA CHATS research program.
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115
lib/libpam/modules/pam_ftpusers/pam_ftpusers.c
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115
lib/libpam/modules/pam_ftpusers/pam_ftpusers.c
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@ -0,0 +1,115 @@
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/*-
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* Copyright (c) 2001 Networks Associates Technology, Inc.
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* All rights reserved.
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*
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* This software was developed for the FreeBSD Project by ThinkSec AS and
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* NAI Labs, the Security Research Division of Network Associates, Inc.
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* under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the
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* 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 <ctype.h>
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#include <grp.h>
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#include <paths.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define PAM_SM_ACCOUNT
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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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#include <security/openpam.h>
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PAM_EXTERN int
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pam_sm_acct_mgmt(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 *pwd;
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struct group *grp;
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const char *user;
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int pam_err, found, allow;
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char *line, *name, **mem;
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size_t len, ulen;
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FILE *f;
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pam_err = pam_get_user(pamh, &user, NULL);
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if (pam_err != PAM_SUCCESS)
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return (pam_err);
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if (user == NULL || (pwd = getpwnam(user)) == NULL)
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return (PAM_SERVICE_ERR);
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found = 0;
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ulen = strlen(user);
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if ((f = fopen(_PATH_FTPUSERS, "r")) == NULL) {
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PAM_LOG("%s: %m", _PATH_FTPUSERS);
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goto done;
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}
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while (!found && (line = fgetln(f, &len)) != NULL) {
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if (*line == '#')
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continue;
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while (len > 0 && isspace(line[len - 1]))
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--len;
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if (len == 0)
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continue;
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/* simple case first */
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if (*line != '@') {
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if (len == ulen && strncmp(user, line, len) == 0)
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found = 1;
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continue;
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}
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/* member of specified group? */
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asprintf(&name, "%.*s", (int)len - 1, line + 1);
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if (name == NULL) {
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fclose(f);
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return (PAM_BUF_ERR);
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}
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grp = getgrnam(name);
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free(name);
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if (grp == NULL)
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continue;
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for (mem = grp->gr_mem; mem && *mem && !found; ++mem)
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if (strcmp(user, *mem) == 0)
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found = 1;
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}
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done:
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allow = (openpam_get_option(pamh, "disallow") == NULL);
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if (found)
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pam_err = allow ? PAM_SUCCESS : PAM_AUTH_ERR;
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else
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pam_err = allow ? PAM_AUTH_ERR : PAM_SUCCESS;
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if (f != NULL)
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fclose(f);
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return (pam_err);
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}
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PAM_MODULE_ENTRY("pam_ftpusers");
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