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77 lines
2.7 KiB
C++
77 lines
2.7 KiB
C++
/*
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Minetest
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Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#pragma once
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#include "cpp_api/s_base.h"
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#define CHECK_SECURE_PATH_INTERNAL(L, path, write_required, ptr) \
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if (!ScriptApiSecurity::checkPath(L, path, write_required, ptr)) { \
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throw LuaError(std::string("Mod security: Blocked attempted ") + \
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(write_required ? "write to " : "read from ") + path); \
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}
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#define CHECK_SECURE_PATH(L, path, write_required) \
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if (ScriptApiSecurity::isSecure(L)) { \
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CHECK_SECURE_PATH_INTERNAL(L, path, write_required, NULL); \
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}
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#define CHECK_SECURE_PATH_POSSIBLE_WRITE(L, path, ptr) \
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if (ScriptApiSecurity::isSecure(L)) { \
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CHECK_SECURE_PATH_INTERNAL(L, path, false, ptr); \
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}
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class ScriptApiSecurity : virtual public ScriptApiBase
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{
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public:
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int getThread(lua_State *L);
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// creates an empty Lua environment
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void createEmptyEnv(lua_State *L);
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// sets the enviroment to the table thats on top of the stack
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void setLuaEnv(lua_State *L, int thread);
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// Sets up security on the ScriptApi's Lua state
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void initializeSecurity();
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void initializeSecurityClient();
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// Checks if the Lua state has been secured
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static bool isSecure(lua_State *L);
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// Loads a file as Lua code safely (doesn't allow bytecode).
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static bool safeLoadFile(lua_State *L, const char *path, const char *display_name = NULL);
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// Checks if mods are allowed to read (and optionally write) to the path
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static bool checkPath(lua_State *L, const char *path, bool write_required,
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bool *write_allowed=NULL);
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private:
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// Syntax: "sl_" <Library name or 'g' (global)> '_' <Function name>
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// (sl stands for Secure Lua)
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static int sl_g_dofile(lua_State *L);
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static int sl_g_load(lua_State *L);
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static int sl_g_loadfile(lua_State *L);
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static int sl_g_loadstring(lua_State *L);
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static int sl_g_require(lua_State *L);
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static int sl_io_open(lua_State *L);
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static int sl_io_input(lua_State *L);
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static int sl_io_output(lua_State *L);
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static int sl_io_lines(lua_State *L);
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static int sl_os_rename(lua_State *L);
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static int sl_os_remove(lua_State *L);
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};
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