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/*
* SPDX-License-Identifier: ISC
*
* Copyright (c) 2020 Robert Manner <robert.manner@oneidentity.com>
*
* 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 "python_plugin_common.h"
struct ApprovalPluginContext
{
struct PluginContext base_ctx;
struct approval_plugin *plugin;
};
#define BASE_CTX(approval_ctx) (&(approval_ctx->base_ctx))
#define PY_APPROVAL_PLUGIN_VERSION SUDO_API_MKVERSION(1, 0)
#define CALLBACK_PLUGINFUNC(func_name) approval_ctx->plugin->func_name
// This also verifies compile time that the name matches the sudo plugin API.
#define CALLBACK_PYNAME(func_name) ((void)CALLBACK_PLUGINFUNC(func_name), #func_name)
sudo_dso_public struct approval_plugin *python_approval_clone(void);
static int
python_plugin_approval_open(struct ApprovalPluginContext *approval_ctx,
unsigned int version, sudo_conv_t conversation, sudo_printf_t sudo_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)
{
debug_decl(python_plugin_approval_open, PYTHON_DEBUG_CALLBACKS);
(void) version;
int rc = python_plugin_register_logging(conversation, sudo_printf, settings);
if (rc != SUDO_RC_OK) {
debug_return_int(rc);
}
struct PluginContext *plugin_ctx = BASE_CTX(approval_ctx);
rc = python_plugin_init(plugin_ctx, plugin_options, version);
if (rc != SUDO_RC_OK) {
debug_return_int(rc);
}
PyObject *py_kwargs = NULL, *py_submit_optind = NULL,
*py_submit_argv = NULL;
if ((py_kwargs = python_plugin_construct_args(version, settings, user_info,
submit_envp, plugin_options)) == NULL ||
(py_submit_optind = PyLong_FromLong(submit_optind)) == NULL ||
(py_submit_argv = py_str_array_to_tuple(submit_argv)) == NULL)
{
py_log_last_error("Failed to construct plugin instance");
rc = SUDO_RC_ERROR;
} else {
PyDict_SetItemString(py_kwargs, "submit_optind", py_submit_optind);
PyDict_SetItemString(py_kwargs, "submit_argv", py_submit_argv);
rc = python_plugin_construct_custom(plugin_ctx, py_kwargs);
CALLBACK_SET_ERROR(plugin_ctx, errstr);
}
Py_CLEAR(py_kwargs);
Py_CLEAR(py_submit_argv);
Py_CLEAR(py_submit_optind);
if (rc != SUDO_RC_OK) {
debug_return_int(rc);
}
debug_return_int(rc);
}
static void
python_plugin_approval_close(struct ApprovalPluginContext *approval_ctx)
{
debug_decl(python_plugin_approval_close, PYTHON_DEBUG_CALLBACKS);
struct PluginContext *plugin_ctx = BASE_CTX(approval_ctx);
PyThreadState_Swap(plugin_ctx->py_interpreter);
python_plugin_deinit(plugin_ctx);
debug_return;
}
static int
python_plugin_approval_check(struct ApprovalPluginContext *approval_ctx,
char * const command_info[], char * const run_argv[],
char * const run_envp[], const char **errstr)
{
debug_decl(python_plugin_approval_check, PYTHON_DEBUG_CALLBACKS);
struct PluginContext *plugin_ctx = BASE_CTX(approval_ctx);
PyObject *py_command_info = NULL, *py_run_argv = NULL, *py_run_envp = NULL,
*py_args = NULL;
int rc = SUDO_RC_ERROR;
if ((py_command_info = py_str_array_to_tuple(command_info)) != NULL &&
(py_run_argv = py_str_array_to_tuple(run_argv)) != NULL &&
(py_run_envp = py_str_array_to_tuple(run_envp)) != NULL)
{
py_args = Py_BuildValue("(OOO)", py_command_info, py_run_argv, py_run_envp);
}
// Note, py_args gets cleared by api_rc_call
rc = python_plugin_api_rc_call(plugin_ctx, CALLBACK_PYNAME(check), py_args);
CALLBACK_SET_ERROR(plugin_ctx, errstr);
Py_CLEAR(py_command_info);
Py_CLEAR(py_run_argv);
Py_CLEAR(py_run_envp);
debug_return_int(rc);
}
static int
python_plugin_approval_show_version(struct ApprovalPluginContext *approval_ctx, int verbose)
{
debug_decl(python_plugin_approval_show_version, PYTHON_DEBUG_CALLBACKS);
struct PluginContext *plugin_ctx = BASE_CTX(approval_ctx);
PyThreadState_Swap(plugin_ctx->py_interpreter);
debug_return_int(python_plugin_show_version(plugin_ctx,
CALLBACK_PYNAME(show_version), verbose, PY_APPROVAL_PLUGIN_VERSION, "approval"));
}
sudo_dso_public struct approval_plugin python_approval;
// generate symbols for loading multiple approval plugins:
#define APPROVAL_SYMBOL_NAME(symbol) symbol
#include "python_plugin_approval_multi.inc"
#define APPROVAL_SYMBOL_NAME(symbol) symbol##1
#include "python_plugin_approval_multi.inc"
#define APPROVAL_SYMBOL_NAME(symbol) symbol##2
#include "python_plugin_approval_multi.inc"
#define APPROVAL_SYMBOL_NAME(symbol) symbol##3
#include "python_plugin_approval_multi.inc"
#define APPROVAL_SYMBOL_NAME(symbol) symbol##4
#include "python_plugin_approval_multi.inc"
#define APPROVAL_SYMBOL_NAME(symbol) symbol##5
#include "python_plugin_approval_multi.inc"
#define APPROVAL_SYMBOL_NAME(symbol) symbol##6
#include "python_plugin_approval_multi.inc"
#define APPROVAL_SYMBOL_NAME(symbol) symbol##7
#include "python_plugin_approval_multi.inc"
static struct approval_plugin *extra_approval_plugins[] = {
&python_approval1,
&python_approval2,
&python_approval3,
&python_approval4,
&python_approval5,
&python_approval6,
&python_approval7
};
struct approval_plugin *
python_approval_clone(void)
{
static size_t counter = 0;
struct approval_plugin *next_plugin = NULL;
size_t max = sizeof(extra_approval_plugins) / sizeof(*extra_approval_plugins);
if (counter < max) {
next_plugin = extra_approval_plugins[counter];
++counter;
} else if (counter == max) {
++counter;
py_sudo_log(SUDO_CONV_ERROR_MSG,
"sudo: loading more than %d sudo python approval plugins is not supported\n", counter);
}
return next_plugin;
}
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