From 025c439e829e0db9ac511cd9c1b8d5fd53475ead Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 15 Apr 2024 15:14:46 +0200 Subject: Adding upstream version 1.9.15p5. Signed-off-by: Daniel Baumann --- plugins/python/python_plugin_policy.c | 289 ++++++++++++++++++++++++++++++++++ 1 file changed, 289 insertions(+) create mode 100644 plugins/python/python_plugin_policy.c (limited to 'plugins/python/python_plugin_policy.c') diff --git a/plugins/python/python_plugin_policy.c b/plugins/python/python_plugin_policy.c new file mode 100644 index 0000000..5f356c2 --- /dev/null +++ b/plugins/python/python_plugin_policy.c @@ -0,0 +1,289 @@ +/* + * SPDX-License-Identifier: ISC + * + * Copyright (c) 2019-2020 Robert Manner + * + * 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" + + +static struct PluginContext plugin_ctx; + +extern struct policy_plugin python_policy; + +#define PY_POLICY_PLUGIN_VERSION SUDO_API_MKVERSION(1, 0) + +#define CALLBACK_PLUGINFUNC(func_name) python_policy.func_name +#define CALLBACK_CFUNC(func_name) python_plugin_policy_ ## 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) + +#define MARK_CALLBACK_OPTIONAL(function_name) \ + do { \ + python_plugin_mark_callback_optional(&plugin_ctx, CALLBACK_PYNAME(function_name), \ + (void **)&CALLBACK_PLUGINFUNC(function_name)); \ + } while(0) + + +static int +python_plugin_policy_open(unsigned int version, sudo_conv_t conversation, + sudo_printf_t sudo_printf, char * const settings[], + char * const user_info[], char * const user_env[], + char * const plugin_options[], const char **errstr) +{ + debug_decl(python_plugin_policy_open, PYTHON_DEBUG_CALLBACKS); + + if (version < SUDO_API_MKVERSION(1, 2)) { + sudo_printf(SUDO_CONV_ERROR_MSG, + "Error: Python policy plugin requires at least plugin API version 1.2\n"); + debug_return_int(SUDO_RC_ERROR); + } + + int rc = python_plugin_register_logging(conversation, sudo_printf, settings); + if (rc != SUDO_RC_OK) + debug_return_int(rc); + + rc = python_plugin_init(&plugin_ctx, plugin_options, version); + if (rc != SUDO_RC_OK) + debug_return_int(rc); + + rc = python_plugin_construct(&plugin_ctx, PY_POLICY_PLUGIN_VERSION, settings, + user_info, user_env, plugin_options); + CALLBACK_SET_ERROR(&plugin_ctx, errstr); + if (rc != SUDO_RC_OK) { + debug_return_int(rc); + } + + // skip plugin callbacks which are not mandatory + MARK_CALLBACK_OPTIONAL(list); + MARK_CALLBACK_OPTIONAL(validate); + MARK_CALLBACK_OPTIONAL(invalidate); + MARK_CALLBACK_OPTIONAL(init_session); + // check_policy, open and close are mandatory + + debug_return_int(rc); +} + +static void +python_plugin_policy_close(int exit_status, int error) +{ + debug_decl(python_plugin_policy_close, PYTHON_DEBUG_CALLBACKS); + python_plugin_close(&plugin_ctx, CALLBACK_PYNAME(close), + Py_BuildValue("(ii)", error == 0 ? exit_status : -1, error)); + debug_return; +} + +static int +python_plugin_policy_check(int argc, char * const argv[], + char *env_add[], char **command_info_out[], + char **argv_out[], char **user_env_out[], const char **errstr) +{ + debug_decl(python_plugin_policy_check, PYTHON_DEBUG_CALLBACKS); + int rc = SUDO_RC_ERROR; + + PyThreadState_Swap(plugin_ctx.py_interpreter); + + *command_info_out = *argv_out = *user_env_out = NULL; + + PyObject *py_argv = py_str_array_to_tuple_with_count(argc, argv); + + PyObject *py_env_add = py_str_array_to_tuple(env_add); + PyObject *py_result = NULL; + + if (py_argv == NULL || py_env_add == NULL) { + sudo_debug_printf(SUDO_DEBUG_ERROR, "Failed to create some of the arguments for the python call " + "(py_argv=%p py_env_add=%p)\n", (void *)py_argv, (void *)py_env_add); + goto cleanup; + } + + py_result = python_plugin_api_call(&plugin_ctx, CALLBACK_PYNAME(check_policy), + Py_BuildValue("(OO)", py_argv, py_env_add)); + CALLBACK_SET_ERROR(&plugin_ctx, errstr); + if (py_result == NULL) + goto cleanup; + + PyObject *py_rc = NULL, + *py_command_info_out = NULL, + *py_argv_out = NULL, + *py_user_env_out = NULL; + if (PyTuple_Check(py_result)) + { + if (!PyArg_ParseTuple(py_result, "O!|O!O!O!:python_plugin.check_policy", + &PyLong_Type, &py_rc, + &PyTuple_Type, &py_command_info_out, + &PyTuple_Type, &py_argv_out, + &PyTuple_Type, &py_user_env_out)) + { + goto cleanup; + } + } else { + py_rc = py_result; + } + + if (py_command_info_out != NULL) + *command_info_out = py_str_array_from_tuple(py_command_info_out); + + if (py_argv_out != NULL) + *argv_out = py_str_array_from_tuple(py_argv_out); + + if (py_user_env_out != NULL) + *user_env_out = py_str_array_from_tuple(py_user_env_out); + + rc = python_plugin_rc_to_int(py_rc); + +cleanup: + if (PyErr_Occurred()) { + py_log_last_error(NULL); + rc = SUDO_RC_ERROR; + free(*command_info_out); + free(*argv_out); + free(*user_env_out); + *command_info_out = *argv_out = *user_env_out = NULL; + } + + Py_XDECREF(py_argv); + Py_XDECREF(py_env_add); + Py_XDECREF(py_result); + + if (rc == SUDO_RC_ACCEPT) + plugin_ctx.call_close = 1; + + debug_return_int(rc); +} + +static int +python_plugin_policy_list(int argc, char * const argv[], int verbose, const char *list_user, const char **errstr) +{ + debug_decl(python_plugin_policy_list, PYTHON_DEBUG_CALLBACKS); + + PyThreadState_Swap(plugin_ctx.py_interpreter); + + PyObject *py_argv = py_str_array_to_tuple_with_count(argc, argv); + if (py_argv == NULL) { + sudo_debug_printf(SUDO_DEBUG_ERROR, "%s: Failed to create argv argument for the python call\n", __func__); + debug_return_int(SUDO_RC_ERROR); + } + + int rc = python_plugin_api_rc_call(&plugin_ctx, CALLBACK_PYNAME(list), + Py_BuildValue("(Oiz)", py_argv, verbose, list_user)); + + Py_XDECREF(py_argv); + + CALLBACK_SET_ERROR(&plugin_ctx, errstr); + debug_return_int(rc); +} + +static int +python_plugin_policy_version(int verbose) +{ + debug_decl(python_plugin_policy_version, PYTHON_DEBUG_CALLBACKS); + + PyThreadState_Swap(plugin_ctx.py_interpreter); + + debug_return_int(python_plugin_show_version(&plugin_ctx, CALLBACK_PYNAME(show_version), + verbose, PY_POLICY_PLUGIN_VERSION, "policy")); +} + +static int +python_plugin_policy_validate(const char **errstr) +{ + debug_decl(python_plugin_policy_validate, PYTHON_DEBUG_CALLBACKS); + PyThreadState_Swap(plugin_ctx.py_interpreter); + int rc = python_plugin_api_rc_call(&plugin_ctx, CALLBACK_PYNAME(validate), NULL); + CALLBACK_SET_ERROR(&plugin_ctx, errstr); + debug_return_int(rc); +} + +static void +python_plugin_policy_invalidate(int unlinkit) +{ + debug_decl(python_plugin_policy_invalidate, PYTHON_DEBUG_CALLBACKS); + PyThreadState_Swap(plugin_ctx.py_interpreter); + python_plugin_api_rc_call(&plugin_ctx, CALLBACK_PYNAME(invalidate), + Py_BuildValue("(i)", unlinkit)); + debug_return; +} + +static int +python_plugin_policy_init_session(struct passwd *pwd, char **user_env[], const char **errstr) +{ + debug_decl(python_plugin_policy_init_session, PYTHON_DEBUG_CALLBACKS); + int rc = SUDO_RC_ERROR; + PyThreadState_Swap(plugin_ctx.py_interpreter); + PyObject *py_pwd = NULL, *py_user_env = NULL, *py_result = NULL; + + py_pwd = py_from_passwd(pwd); + if (py_pwd == NULL) + goto cleanup; + + py_user_env = py_str_array_to_tuple(*user_env); + if (py_user_env == NULL) + goto cleanup; + + py_result = python_plugin_api_call(&plugin_ctx, CALLBACK_PYNAME(init_session), + Py_BuildValue("(OO)", py_pwd, py_user_env)); + CALLBACK_SET_ERROR(&plugin_ctx, errstr); + if (py_result == NULL) + goto cleanup; + + PyObject *py_user_env_out = NULL, *py_rc = NULL; + if (PyTuple_Check(py_result)) { + if (!PyArg_ParseTuple(py_result, "O!|O!:python_plugin.init_session", + &PyLong_Type, &py_rc, + &PyTuple_Type, &py_user_env_out)) { + goto cleanup; + } + } else { + py_rc = py_result; + } + + if (py_user_env_out != NULL) { + str_array_free(user_env); + *user_env = py_str_array_from_tuple(py_user_env_out); + if (*user_env == NULL) + goto cleanup; + } + + rc = python_plugin_rc_to_int(py_rc); + +cleanup: + Py_XDECREF(py_pwd); + Py_XDECREF(py_user_env); + Py_XDECREF(py_result); + + debug_return_int(rc); +} + +sudo_dso_public struct policy_plugin python_policy = { + SUDO_POLICY_PLUGIN, + SUDO_API_VERSION, + CALLBACK_CFUNC(open), + CALLBACK_CFUNC(close), + CALLBACK_CFUNC(version), + CALLBACK_CFUNC(check), + CALLBACK_CFUNC(list), + CALLBACK_CFUNC(validate), + CALLBACK_CFUNC(invalidate), + CALLBACK_CFUNC(init_session), + NULL, /* register_hooks */ + NULL, /* deregister_hooks */ + NULL /* event_alloc */ +}; -- cgit v1.2.3