aboutsummaryrefslogtreecommitdiff
path: root/src/util/string.h
diff options
context:
space:
mode:
Diffstat (limited to 'src/util/string.h')
0 files changed, 0 insertions, 0 deletions
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-19 02:44:10 +0000
56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 
-- Minetest: builtin/auth.lua

--
-- Authentication handler
--

core.auth_file_path = core.get_worldpath().."/auth.txt"
core.auth_table = {}

local function read_auth_file()
	local newtable = {}
	local file, errmsg = io.open(core.auth_file_path, 'rb')
	if not file then
		core.log("info", core.auth_file_path.." could not be opened for reading ("..errmsg.."); assuming new world")
		return
	end
	for line in file:lines() do
		if line ~= "" then
			local fields = line:split(":", true)
			local name, password, privilege_string, last_login = unpack(fields)
			last_login = tonumber(last_login)
			if not (name and password and privilege_string) then
				error("Invalid line in auth.txt: "..dump(line))
			end
			local privileges = core.string_to_privs(privilege_string)
			newtable[name] = {password=password, privileges=privileges, last_login=last_login}
		end
	end
	io.close(file)
	core.auth_table = newtable
	core.notify_authentication_modified()
end

local function save_auth_file()
	local newtable = {}
	-- Check table for validness before attempting to save
	for name, stuff in pairs(core.auth_table) do
		assert(type(name) == "string")
		assert(name ~= "")
		assert(type(stuff) == "table")
		assert(type(stuff.password) == "string")
		assert(type(stuff.privileges) == "table")
		assert(stuff.last_login == nil or type(stuff.last_login) == "number")
	end
	local file, errmsg = io.open(core.auth_file_path, 'w+b')
	if not file then
		error(core.auth_file_path.." could not be opened for writing: "..errmsg)
	end
	for name, stuff in pairs(core.auth_table) do
		local priv_string = core.privs_to_string(stuff.privileges)
		local parts = {name, stuff.password, priv_string, stuff.last_login or ""}
		file:write(table.concat(parts, ":").."\n")
	end
	io.close(file)
end

read_auth_file()

core.builtin_auth_handler = {
	get_auth = function(name)
		assert(type(name) == "string")
		-- Figure out what password to use for a new player (singleplayer
		-- always has an empty password, otherwise use default, which is
		-- usually empty too)
		local new_password_hash = ""
		-- If not in authentication table, return nil
		if not core.auth_table[name] then
			return nil
		end
		-- Figure out what privileges the player should have.
		-- Take a copy of the privilege table
		local privileges = {}
		for priv, _ in pairs(core.auth_table[name].privileges) do
			privileges[priv] = true
		end
		-- If singleplayer, give all privileges except those marked as give_to_singleplayer = false
		if core.is_singleplayer() then
			for priv, def in pairs(core.registered_privileges) do
				if def.give_to_singleplayer then
					privileges[priv] = true
				end
			end
		-- For the admin, give everything
		elseif name == core.settings:get("name") then
			for priv, def in pairs(core.registered_privileges) do
				privileges[priv] = true
			end
		end
		-- All done
		return {
			password = core.auth_table[name].password,
			privileges = privileges,
			-- Is set to nil if unknown
			last_login = core.auth_table[name].last_login,
		}
	end,
	create_auth = function(name, password)
		assert(type(name) == "string")
		assert(type(password) == "string")
		core.log('info', "Built-in authentication handler adding player '"..name.."'")
		core.auth_table[name] = {
			password = password,
			privileges = core.string_to_privs(core.settings:get("default_privs")),
			last_login = os.time(),
		}
		save_auth_file()
	end,
	set_password = function(name, password)
		assert(type(name) == "string")
		assert(type(password) == "string")
		if not core.auth_table[name] then
			core.builtin_auth_handler.create_auth(name, password)
		else
			core.log('info', "Built-in authentication handler setting password of player '"..name.."'")
			core.auth_table[name].password = password
			save_auth_file()
		end
		return true
	end,
	set_privileges = function(name, privileges)
		assert(type(name) == "string")
		assert(type(privileges) == "table")
		if not core.auth_table[name] then
			core.builtin_auth_handler.create_auth(name,
				core.get_password_hash(name,
					core.settings:get("default_password")))
		end
		core.auth_table[name].privileges = privileges
		core.notify_authentication_modified(name)
		save_auth_file()
	end,
	reload = function()
		read_auth_file()
		return true
	end,
	record_login = function(name)
		assert(type(name) == "string")
		assert(core.auth_table[name]).last_login = os.time()
		save_auth_file()
	end,
}

function core.register_authentication_handler(handler)
	if core.registered_auth_handler then
		error("Add-on authentication handler already registered by "..core.registered_auth_handler_modname)
	end
	core.registered_auth_handler = handler
	core.registered_auth_handler_modname = core.get_current_modname()
	handler.mod_origin = core.registered_auth_handler_modname
end

function core.get_auth_handler()
	return core.registered_auth_handler or core.builtin_auth_handler
end

local function auth_pass(name)
	return function(...)
		local auth_handler = core.get_auth_handler()
		if auth_handler[name] then
			return auth_handler[name](...)
		end
		return false
	end
end

core.set_player_password = auth_pass("set_password")
core.set_player_privs    = auth_pass("set_privileges")
core.auth_reload         = auth_pass("reload")


local record_login = auth_pass("record_login")

core.register_on_joinplayer(function(player)
	record_login(player:get_player_name())
end)

core.register_on_prejoinplayer(function(name, ip)
	local auth = core.auth_table
	if auth[name] ~= nil then
		return
	end

	local name_lower = name:lower()
	for k in pairs(auth) do
		if k:lower() == name_lower then
			return string.format("\nCannot create new player called '%s'. "..
					"Another account called '%s' is already registered. "..
					"Please check the spelling if it's your account "..
					"or use a different nickname.", name, k)
		end
	end
end)
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-19 02:44:10 +0000