240 lines
7.0 KiB
Lua
240 lines
7.0 KiB
Lua
-- Minetest: builtin/auth.lua
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--
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-- Authentication handler
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--
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function core.string_to_privs(str, delim)
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assert(type(str) == "string")
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delim = delim or ','
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local privs = {}
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for _, priv in pairs(string.split(str, delim)) do
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privs[priv:trim()] = true
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end
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return privs
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end
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function core.privs_to_string(privs, delim)
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assert(type(privs) == "table")
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delim = delim or ','
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local list = {}
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for priv, bool in pairs(privs) do
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if bool then
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list[#list + 1] = priv
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end
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end
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return table.concat(list, delim)
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end
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assert(core.string_to_privs("a,b").b == true)
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assert(core.privs_to_string({a=true,b=true}) == "a,b")
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core.auth_file_path = core.get_worldpath().."/auth.txt"
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core.auth_table = {}
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local function read_auth_file()
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local newtable = {}
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local file, errmsg = io.open(core.auth_file_path, 'rb')
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if not file then
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core.log("info", core.auth_file_path.." could not be opened for reading ("..errmsg.."); assuming new world")
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return
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end
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for line in file:lines() do
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if line ~= "" then
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local fields = line:split(":", true)
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local name, password, privilege_string, last_login = unpack(fields)
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last_login = tonumber(last_login)
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if not (name and password and privilege_string) then
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error("Invalid line in auth.txt: "..dump(line))
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end
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local privileges = core.string_to_privs(privilege_string)
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newtable[name] = {password=password, privileges=privileges, last_login=last_login}
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end
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end
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io.close(file)
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core.auth_table = newtable
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core.notify_authentication_modified()
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end
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local function save_auth_file()
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local newtable = {}
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-- Check table for validness before attempting to save
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for name, stuff in pairs(core.auth_table) do
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assert(type(name) == "string")
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assert(name ~= "")
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assert(type(stuff) == "table")
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assert(type(stuff.password) == "string")
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assert(type(stuff.privileges) == "table")
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assert(stuff.last_login == nil or type(stuff.last_login) == "number")
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end
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local file, errmsg = io.open(core.auth_file_path, 'w+b')
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if not file then
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error(core.auth_file_path.." could not be opened for writing: "..errmsg)
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end
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for name, stuff in pairs(core.auth_table) do
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local priv_string = core.privs_to_string(stuff.privileges)
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local parts = {name, stuff.password, priv_string, stuff.last_login or ""}
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file:write(table.concat(parts, ":").."\n")
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end
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io.close(file)
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end
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core.builtin_auth_handler = {
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get_auth = function(name)
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assert(type(name) == "string")
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-- Figure out what password to use for a new player (singleplayer
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-- always has an empty password, otherwise use default, which is
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-- usually empty too)
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local new_password_hash = ""
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-- If not in authentication table, return nil
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if not core.auth_table[name] then
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return nil
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end
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-- Figure out what privileges the player should have.
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-- Take a copy of the privilege table
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local privileges = {}
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for priv, _ in pairs(core.auth_table[name].privileges) do
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privileges[priv] = true
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end
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-- If singleplayer, give all privileges except those marked as give_to_singleplayer = false
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if core.is_singleplayer() then
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for priv, def in pairs(core.registered_privileges) do
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if def.give_to_singleplayer then
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privileges[priv] = true
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end
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end
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-- For the admin, give everything
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elseif name == core.settings:get("name") then
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for priv, def in pairs(core.registered_privileges) do
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privileges[priv] = true
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end
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end
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-- All done
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return {
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password = core.auth_table[name].password,
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privileges = privileges,
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-- Is set to nil if unknown
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last_login = core.auth_table[name].last_login,
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}
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end,
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create_auth = function(name, password)
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core.log("action", "Adding password entry for player " .. name)
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assert(type(name) == "string")
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assert(type(password) == "string")
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core.log('info', "Built-in authentication handler adding player '"..name.."'")
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core.auth_table[name] = {
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password = password,
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privileges = core.string_to_privs(core.settings:get("default_privs")),
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last_login = os.time(),
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}
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end,
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set_password = function(name, password)
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assert(type(name) == "string")
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assert(type(password) == "string")
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if not core.auth_table[name] then
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core.log("action", "Setting password for new player " .. name)
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core.builtin_auth_handler.create_auth(name, password)
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else
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core.log("action", "Setting password for existing player " .. name )
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core.log('info', "Built-in authentication handler setting password of player '"..name.."'")
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core.auth_table[name].password = password
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end
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return true
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end,
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set_privileges = function(name, privileges)
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core.log("action", "Setting privileges for player " .. name )
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assert(type(name) == "string")
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assert(type(privileges) == "table")
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if not core.auth_table[name] then
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core.builtin_auth_handler.create_auth(name,
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core.get_password_hash(name,
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core.settings:get("default_password")))
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end
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core.auth_table[name].privileges = privileges
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core.notify_authentication_modified(name)
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end,
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reload = function()
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core.log("action", "Reading authentication data from disk")
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read_auth_file()
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return true
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end,
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commit = function()
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core.log("action", "Writing authentication data to disk")
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save_auth_file()
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return true
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end,
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record_login = function(name)
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core.log("action", "Recording login time for player " .. name )
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assert(type(name) == "string")
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assert(core.auth_table[name]).last_login = os.time()
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end,
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}
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function core.register_authentication_handler(handler)
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if core.registered_auth_handler then
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error("Add-on authentication handler already registered by "..core.registered_auth_handler_modname)
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end
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core.registered_auth_handler = handler
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core.registered_auth_handler_modname = core.get_current_modname()
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handler.mod_origin = core.registered_auth_handler_modname
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end
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function core.get_auth_handler()
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return core.registered_auth_handler or core.builtin_auth_handler
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end
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local function auth_pass(name)
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return function(...)
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local auth_handler = core.get_auth_handler()
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if auth_handler[name] then
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return auth_handler[name](...)
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end
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return false
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end
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end
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core.set_player_password = auth_pass("set_password")
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core.set_player_privs = auth_pass("set_privileges")
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core.auth_reload = auth_pass("reload")
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core.auth_commit = auth_pass("commit")
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core.auth_reload()
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local record_login = auth_pass("record_login")
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core.register_on_joinplayer(function(player)
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record_login(player:get_player_name())
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end)
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core.register_on_shutdown(function()
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core.auth_commit()
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end)
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core.register_on_prejoinplayer(function(name, ip)
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local auth = core.auth_table
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if auth[name] ~= nil then
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return
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end
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local name_lower = name:lower()
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for k in pairs(auth) do
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if k:lower() == name_lower then
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return string.format("\nCannot create new player called '%s'. "..
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"Another account called '%s' is already registered. "..
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"Please check the spelling if it's your account "..
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"or use a different nickname.", name, k)
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end
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end
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end)
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-- Autosave
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if not core.is_singleplayer() then
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local save_interval = tonumber(core.settings:get("server_map_save_interval"))
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local function auto_save()
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core.auth_commit()
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core.after(save_interval * 2, auto_save)
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end
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core.after(60, auto_save)
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end
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