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Just to show that PAM can do almost anything from the ridiculous to the

Browse source 
obscene, or - as they say in New York - sophisticated, add pam_echo(8) and
pam_exec(8) to our ever-lengthening roster of PAM modules.

Sponsored by:	DARPA, NAI Labs.
This commit is contained in:
Dag-Erling Smørgrav 2002-05-23 22:03:06 +00:00
parent 9e2e036f90
commit f65b218085
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=97182
7 changed files with 418 additions and 0 deletions
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2
lib/libpam/modules/modules.inc
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@ -2,6 +2,8 @@
MODULES =
MODULES += pam_deny
MODULES += pam_echo
MODULES += pam_exec
MODULES += pam_ftp
MODULES += pam_ftpusers
.if defined(MAKE_KERBEROS4) && !defined(NOCRYPT) && !defined(NO_OPENSSL)

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

64
lib/libpam/modules/pam_echo/pam_echo.8 Normal file
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.\" 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 May 24, 2002
.Dt PAM_ECHO 8
.Os
.Sh NAME
.Nm pam_echo
.Nd Echo PAM module
.Sh SYNOPSIS
.Op Ar service-name
.Ar module-type
.Ar control-flag
.Pa pam_echo
.Op Ar arguments
.Sh DESCRIPTION
The echo service module for PAM displays its arguments to the user,
separated by spaces, using the current conversation function.
.Sh SEE ALSO
.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.

126
lib/libpam/modules/pam_echo/pam_echo.c Normal file
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@ -0,0 +1,126 @@
/*-
* Copyright (c) 2001 Networks Associates Technology, Inc.
* All rights reserved.
*
* This software was 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <security/pam_appl.h>
#include <security/pam_modules.h>
#include <security/openpam.h>
static int
_pam_echo(pam_handle_t *pamh, int flags,
int argc, const char *argv[])
{
struct pam_message msg;
const struct pam_message *msgp;
const struct pam_conv *pamc;
struct pam_response *resp;
size_t len;
int i, pam_err;
if (flags & PAM_SILENT)
return (PAM_SUCCESS);
pam_err = pam_get_item(pamh, PAM_CONV, (const void **)&pamc);
if (pam_err != PAM_SUCCESS)
return (pam_err);
for (i = 0, len = 0; i < argc; ++i)
len += strlen(argv[i]) + 1;
if ((msg.msg = malloc(len)) == NULL)
return (PAM_BUF_ERR);
for (i = 0, len = 0; i < argc; ++i)
len += sprintf(msg.msg + len, "%s%s", i ? " " : "", argv[i]);
msg.msg[len] = '\0';
msg.msg_style = PAM_TEXT_INFO;
msgp = &msg;
resp = NULL;
pam_err = (pamc->conv)(1, &msgp, &resp, pamc->appdata_ptr);
free(resp);
free(msg.msg);
return (pam_err);
}
PAM_EXTERN int
pam_sm_authenticate(pam_handle_t *pamh, int flags,
int argc, const char *argv[])
{
return (_pam_echo(pamh, flags, argc, argv));
}
PAM_EXTERN int
pam_sm_setcred(pam_handle_t *pamh, int flags,
int argc, const char *argv[])
{
return (_pam_echo(pamh, flags, argc, argv));
}
PAM_EXTERN int
pam_sm_acct_mgmt(pam_handle_t *pamh, int flags,
int argc, const char *argv[])
{
return (_pam_echo(pamh, flags, argc, argv));
}
PAM_EXTERN int
pam_sm_open_session(pam_handle_t *pamh, int flags,
int argc, const char *argv[])
{
return (_pam_echo(pamh, flags, argc, argv));
}
PAM_EXTERN int
pam_sm_close_session(pam_handle_t *pamh, int flags,
int argc, const char *argv[])
{
return (_pam_echo(pamh, flags, argc, argv));
}
PAM_EXTERN int
pam_sm_chauthtok(pam_handle_t *pamh, int flags,
int argc, const char *argv[])
{
return (_pam_echo(pamh, flags, argc, argv));
}
PAM_MODULE_ENTRY("pam_echo");

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

65
lib/libpam/modules/pam_exec/pam_exec.8 Normal file
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@ -0,0 +1,65 @@
.\" 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 May 24, 2002
.Dt PAM_EXEC 8
.Os
.Sh NAME
.Nm pam_exec
.Nd Exec PAM module
.Sh SYNOPSIS
.Op Ar service-name
.Ar module-type
.Ar control-flag
.Pa pam_exec
.Op Ar arguments
.Sh DESCRIPTION
The exec service module for PAM executes the program designated by its
first argument, with its remaining arguments as command-line
arguments.
.Sh SEE ALSO
.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.

147
lib/libpam/modules/pam_exec/pam_exec.c Normal file
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@ -0,0 +1,147 @@
/*-
* Copyright (c) 2001 Networks Associates Technology, Inc.
* All rights reserved.
*
* This software was 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 <sys/types.h>
#include <sys/wait.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <security/pam_appl.h>
#include <security/pam_modules.h>
#include <security/openpam.h>
static int
_pam_exec(pam_handle_t *pamh __unused, int flags __unused,
int argc, const char *argv[])
{
int childerr, status;
pid_t pid;
if (argc < 1)
return (PAM_SERVICE_ERR);
/*
* XXX For additional credit, divert child's stdin/stdout/stderr
* to the conversation function.
*/
childerr = 0;
if ((pid = vfork()) == 0) {
execv(argv[0], argv);
childerr = errno;
_exit(1);
} else if (pid == -1) {
openpam_log(PAM_LOG_ERROR, "vfork(): %m");
return (PAM_SYSTEM_ERR);
}
if (waitpid(pid, &status, 0) == -1) {
openpam_log(PAM_LOG_ERROR, "waitpid(): %m");
return (PAM_SYSTEM_ERR);
}
if (childerr != 0) {
openpam_log(PAM_LOG_ERROR, "execv(): %m");
return (PAM_SYSTEM_ERR);
}
if (WIFSIGNALED(status)) {
openpam_log(PAM_LOG_ERROR, "%s caught signal %d%s",
argv[0], WTERMSIG(status),
WCOREDUMP(status) ? " (core dumped)" : "");
return (PAM_SYSTEM_ERR);
}
if (!WIFEXITED(status)) {
openpam_log(PAM_LOG_ERROR, "unknown status 0x%x", status);
return (PAM_SYSTEM_ERR);
}
if (WEXITSTATUS(status) != 0) {
openpam_log(PAM_LOG_ERROR, "%s returned code %d",
argv[0], WEXITSTATUS(status));
return (PAM_SYSTEM_ERR);
}
return (PAM_SUCCESS);
}
PAM_EXTERN int
pam_sm_authenticate(pam_handle_t *pamh, int flags,
int argc, const char *argv[])
{
return (_pam_exec(pamh, flags, argc, argv));
}
PAM_EXTERN int
pam_sm_setcred(pam_handle_t *pamh, int flags,
int argc, const char *argv[])
{
return (_pam_exec(pamh, flags, argc, argv));
}
PAM_EXTERN int
pam_sm_acct_mgmt(pam_handle_t *pamh, int flags,
int argc, const char *argv[])
{
return (_pam_exec(pamh, flags, argc, argv));
}
PAM_EXTERN int
pam_sm_open_session(pam_handle_t *pamh, int flags,
int argc, const char *argv[])
{
return (_pam_exec(pamh, flags, argc, argv));
}
PAM_EXTERN int
pam_sm_close_session(pam_handle_t *pamh, int flags,
int argc, const char *argv[])
{
return (_pam_exec(pamh, flags, argc, argv));
}
PAM_EXTERN int
pam_sm_chauthtok(pam_handle_t *pamh, int flags,
int argc, const char *argv[])
{
return (_pam_exec(pamh, flags, argc, argv));
}
PAM_MODULE_ENTRY("pam_exec");