f65b218085
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.
148 lines
4.1 KiB
C
148 lines
4.1 KiB
C
/*-
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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 <sys/types.h>
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#include <sys/wait.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <security/pam_appl.h>
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#include <security/pam_modules.h>
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#include <security/openpam.h>
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static int
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_pam_exec(pam_handle_t *pamh __unused, int flags __unused,
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int argc, const char *argv[])
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{
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int childerr, status;
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pid_t pid;
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if (argc < 1)
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return (PAM_SERVICE_ERR);
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/*
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* XXX For additional credit, divert child's stdin/stdout/stderr
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* to the conversation function.
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*/
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childerr = 0;
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if ((pid = vfork()) == 0) {
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execv(argv[0], argv);
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childerr = errno;
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_exit(1);
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} else if (pid == -1) {
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openpam_log(PAM_LOG_ERROR, "vfork(): %m");
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return (PAM_SYSTEM_ERR);
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}
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if (waitpid(pid, &status, 0) == -1) {
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openpam_log(PAM_LOG_ERROR, "waitpid(): %m");
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return (PAM_SYSTEM_ERR);
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}
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if (childerr != 0) {
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openpam_log(PAM_LOG_ERROR, "execv(): %m");
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return (PAM_SYSTEM_ERR);
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}
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if (WIFSIGNALED(status)) {
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openpam_log(PAM_LOG_ERROR, "%s caught signal %d%s",
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argv[0], WTERMSIG(status),
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WCOREDUMP(status) ? " (core dumped)" : "");
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return (PAM_SYSTEM_ERR);
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}
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if (!WIFEXITED(status)) {
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openpam_log(PAM_LOG_ERROR, "unknown status 0x%x", status);
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return (PAM_SYSTEM_ERR);
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}
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if (WEXITSTATUS(status) != 0) {
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openpam_log(PAM_LOG_ERROR, "%s returned code %d",
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argv[0], WEXITSTATUS(status));
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return (PAM_SYSTEM_ERR);
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}
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return (PAM_SUCCESS);
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}
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PAM_EXTERN int
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pam_sm_authenticate(pam_handle_t *pamh, int flags,
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int argc, const char *argv[])
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{
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return (_pam_exec(pamh, flags, argc, argv));
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}
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PAM_EXTERN int
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pam_sm_setcred(pam_handle_t *pamh, int flags,
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int argc, const char *argv[])
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{
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return (_pam_exec(pamh, flags, argc, argv));
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}
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PAM_EXTERN int
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pam_sm_acct_mgmt(pam_handle_t *pamh, int flags,
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int argc, const char *argv[])
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{
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return (_pam_exec(pamh, flags, argc, argv));
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}
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PAM_EXTERN int
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pam_sm_open_session(pam_handle_t *pamh, int flags,
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int argc, const char *argv[])
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{
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return (_pam_exec(pamh, flags, argc, argv));
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}
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PAM_EXTERN int
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pam_sm_close_session(pam_handle_t *pamh, int flags,
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int argc, const char *argv[])
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{
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return (_pam_exec(pamh, flags, argc, argv));
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}
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PAM_EXTERN int
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pam_sm_chauthtok(pam_handle_t *pamh, int flags,
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int argc, const char *argv[])
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{
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return (_pam_exec(pamh, flags, argc, argv));
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}
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PAM_MODULE_ENTRY("pam_exec");
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