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/*
Minetest
Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "cpp_api/s_server.h"
#include "cpp_api/s_internal.h"
#include "common/c_converter.h"
bool ScriptApiServer::getAuth(const std::string &playername,
std::string *dst_password,
std::set<std::string> *dst_privs)
{
SCRIPTAPI_PRECHECKHEADER
lua_pushcfunction(L, script_error_handler);
int errorhandler = lua_gettop(L);
getAuthHandler();
lua_getfield(L, -1, "get_auth");
if(lua_type(L, -1) != LUA_TFUNCTION)
throw LuaError(L, "Authentication handler missing get_auth");
lua_pushstring(L, playername.c_str());
if(lua_pcall(L, 1, 1, errorhandler))
scriptError();
lua_remove(L, -2); // Remove auth handler
lua_remove(L, errorhandler); // Remove error handler
// nil = login not allowed
if(lua_isnil(L, -1))
return false;
luaL_checktype(L, -1, LUA_TTABLE);
std::string password;
bool found = getstringfield(L, -1, "password", password);
if(!found)
throw LuaError(L, "Authentication handler didn't return password");
if(dst_password)
*dst_password = password;
lua_getfield(L, -1, "privileges");
if(!lua_istable(L, -1))
throw LuaError(L, "Authentication handler didn't return privilege table");
if(dst_privs)
readPrivileges(-1, *dst_privs);
lua_pop(L, 1);
return true;
}
void ScriptApiServer::getAuthHandler()
{
lua_State *L = getStack();
lua_getglobal(L, "minetest");
lua_getfield(L, -1, "registered_auth_handler");
if(lua_isnil(L, -1)){
lua_pop(L, 1);
lua_getfield(L, -1, "builtin_auth_handler");
}
lua_remove(L, -2); // Remove minetest
if(lua_type(L, -1) != LUA_TTABLE)
throw LuaError(L, "Authentication handler table not valid");
}
void ScriptApiServer::readPrivileges(int index, std::set<std::string> &result)
{
lua_State *L = getStack();
result.clear();
lua_pushnil(L);
if(index < 0)
index -= 1;
while(lua_next(L, index) != 0){
// key at index -2 and value at index -1
std::string key = luaL_checkstring(L, -2);
bool value = lua_toboolean(L, -1);
if(value)
result.insert(key);
// removes value, keeps key for next iteration
lua_pop(L, 1);
}
}
void ScriptApiServer::createAuth(const std::string &playername,
const std::string &password)
{
SCRIPTAPI_PRECHECKHEADER
lua_pushcfunction(L, script_error_handler);
int errorhandler = lua_gettop(L);
getAuthHandler();
lua_getfield(L, -1, "create_auth");
lua_remove(L, -2); // Remove auth handler
if(lua_type(L, -1) != LUA_TFUNCTION)
throw LuaError(L, "Authentication handler missing create_auth");
lua_pushstring(L, playername.c_str());
lua_pushstring(L, password.c_str());
if(lua_pcall(L, 2, 0, errorhandler))
scriptError();
lua_pop(L, 1); // Pop error handler
}
bool ScriptApiServer::setPassword(const std::string &playername,
const std::string &password)
{
SCRIPTAPI_PRECHECKHEADER
lua_pushcfunction(L, script_error_handler);
int errorhandler = lua_gettop(L);
getAuthHandler();
lua_getfield(L, -1, "set_password");
lua_remove(L, -2); // Remove auth handler
if(lua_type(L, -1) != LUA_TFUNCTION)
throw LuaError(L, "Authentication handler missing set_password");
lua_pushstring(L, playername.c_str());
lua_pushstring(L, password.c_str());
if(lua_pcall(L, 2, 1, errorhandler))
scriptError();
lua_remove(L, -2); // Remove error handler
return lua_toboolean(L, -1);
}
bool ScriptApiServer::on_chat_message(const std::string &name,
const std::string &message)
{
SCRIPTAPI_PRECHECKHEADER
// Get minetest.registered_on_chat_messages
lua_getglobal(L, "minetest");
lua_getfield(L, -1, "registered_on_chat_messages");
// Call callbacks
lua_pushstring(L, name.c_str());
lua_pushstring(L, message.c_str());
script_run_callbacks(L, 2, RUN_CALLBACKS_MODE_OR_SC);
bool ate = lua_toboolean(L, -1);
return ate;
}
void ScriptApiServer::on_shutdown()
{
SCRIPTAPI_PRECHECKHEADER
// Get registered shutdown hooks
lua_getglobal(L, "minetest");
lua_getfield(L, -1, "registered_on_shutdown");
// Call callbacks
script_run_callbacks(L, 0, RUN_CALLBACKS_MODE_FIRST);
}
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