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/*
* SPDX-License-Identifier: ISC
*
* Copyright (c) 2020 Todd C. Miller <Todd.Miller@sudo.ws>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* This is an open source non-commercial project. Dear PVS-Studio, please check it.
* PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_STDBOOL_H
# include <stdbool.h>
#else
# include <compat/stdbool.h>
#endif /* HAVE_STDBOOL_H */
#include <string.h>
#include <unistd.h>
#include <time.h>
#include <sudo_compat.h>
#include <sudo_conf.h>
#include <sudo_debug.h>
#include <sudo_fatal.h>
#include <sudo_gettext.h>
#include <sudo_plugin.h>
#include <sudo_util.h>
static int approval_debug_instance = SUDO_DEBUG_INSTANCE_INITIALIZER;
sudo_printf_t sudo_printf;
static int
sample_approval_open(unsigned int version, sudo_conv_t conversation,
sudo_printf_t plugin_printf, char * const settings[],
char * const user_info[], int submit_optind, char * const submit_argv[],
char * const submit_envp[], char * const plugin_options[],
const char **errstr)
{
struct sudo_conf_debug_file_list debug_files =
TAILQ_HEAD_INITIALIZER(debug_files);
struct sudo_debug_file *debug_file;
const char *cp, *plugin_path = NULL;
char * const *cur;
int ret = -1;
debug_decl_vars(sample_approval_open, SUDO_DEBUG_PLUGIN);
sudo_printf = plugin_printf;
/* Initialize the debug subsystem. */
for (cur = settings; (cp = *cur) != NULL; cur++) {
if (strncmp(cp, "debug_flags=", sizeof("debug_flags=") - 1) == 0) {
cp += sizeof("debug_flags=") - 1;
if (sudo_debug_parse_flags(&debug_files, cp) == -1)
goto oom;
continue;
}
if (strncmp(cp, "plugin_path=", sizeof("plugin_path=") - 1) == 0) {
plugin_path = cp + sizeof("plugin_path=") - 1;
continue;
}
}
if (plugin_path != NULL && !TAILQ_EMPTY(&debug_files)) {
approval_debug_instance =
sudo_debug_register(plugin_path, NULL, NULL, &debug_files, -1);
if (approval_debug_instance == SUDO_DEBUG_INSTANCE_ERROR) {
*errstr = U_("unable to initialize debugging");
goto done;
}
sudo_debug_enter(__func__, __FILE__, __LINE__, sudo_debug_subsys);
}
ret = 1;
goto done;
oom:
sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
*errstr = U_("unable to allocate memory");
done:
while ((debug_file = TAILQ_FIRST(&debug_files)) != NULL) {
TAILQ_REMOVE(&debug_files, debug_file, entries);
free(debug_file->debug_file);
free(debug_file->debug_flags);
free(debug_file);
}
debug_return_int(ret);
}
static void
sample_approval_close(void)
{
debug_decl(sample_approval_close, SUDO_DEBUG_PLUGIN);
/* Nothing here, we could store a NULL pointer instead. */
debug_return;
}
static int
sample_approval_check(char * const command_info[], char * const run_argv[],
char * const run_envp[], const char **errstr)
{
struct tm tm;
time_t now;
int ret = 0;
debug_decl(sample_approval_check, SUDO_DEBUG_PLUGIN);
/*
* Only approve requests that are within business hours,
* which are 9am - 5pm local time. Does not check holidays.
*/
if (time(&now) == -1 || localtime_r(&now, &tm) == NULL)
goto done;
if (tm.tm_wday < 1 || tm.tm_wday > 5) {
/* bad weekday */
goto done;
}
if (tm.tm_hour < 9 || tm.tm_hour > 17 ||
(tm.tm_hour == 17 && tm.tm_min > 0)) {
/* bad hour */
goto done;
}
ret = 1;
done:
if (ret == 0) {
*errstr = U_("You are not allowed to use sudo outside business hours");
sudo_printf(SUDO_CONV_ERROR_MSG, "%s\n", *errstr);
}
debug_return_int(ret);
}
static int
sample_approval_show_version(int verbose)
{
debug_decl(approval_show_version, SUDO_DEBUG_PLUGIN);
sudo_printf(SUDO_CONV_INFO_MSG, "sample approval plugin version %s\n",
PACKAGE_VERSION);
debug_return_int(true);
}
sudo_dso_public struct approval_plugin sample_approval = {
SUDO_APPROVAL_PLUGIN,
SUDO_API_VERSION,
sample_approval_open,
sample_approval_close,
sample_approval_check,
sample_approval_show_version
};
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