106 lines
2.4 KiB
Lua
106 lines
2.4 KiB
Lua
--[[
|
|
|
|
Session authentication
|
|
(c) 2008 Steven Barth <steven@midlink.org>
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
$Id: sauth.lua 3941 2008-12-23 21:39:38Z jow $
|
|
|
|
]]--
|
|
|
|
--- LuCI session library.
|
|
module("luci.sauth", package.seeall)
|
|
require("luci.fs")
|
|
require("luci.util")
|
|
require("luci.sys")
|
|
require("luci.config")
|
|
|
|
|
|
luci.config.sauth = luci.config.sauth or {}
|
|
sessionpath = luci.config.sauth.sessionpath
|
|
sessiontime = tonumber(luci.config.sauth.sessiontime) or 15 * 60
|
|
|
|
--- Manually clean up expired sessions.
|
|
function clean()
|
|
local now = os.time()
|
|
local files = luci.fs.dir(sessionpath)
|
|
|
|
if not files then
|
|
return nil
|
|
end
|
|
|
|
for i, file in pairs(files) do
|
|
local fname = sessionpath .. "/" .. file
|
|
local stat = luci.fs.stat(fname)
|
|
if stat and stat.type == "regular" and stat.atime + sessiontime < now then
|
|
luci.fs.unlink(fname)
|
|
end
|
|
end
|
|
end
|
|
|
|
--- Prepare session storage by creating the session directory.
|
|
function prepare()
|
|
luci.fs.mkdir(sessionpath)
|
|
luci.fs.chmod(sessionpath, "a-rwx,u+rwx")
|
|
|
|
if not sane() then
|
|
error("Security Exception: Session path is not sane!")
|
|
end
|
|
end
|
|
|
|
--- Read a session and return its content.
|
|
-- @param id Session identifier
|
|
-- @return Session data
|
|
function read(id)
|
|
if not id then
|
|
return
|
|
end
|
|
if not id:match("^%w+$") then
|
|
error("Session ID is not sane!")
|
|
end
|
|
clean()
|
|
if not sane(sessionpath .. "/" .. id) then
|
|
return
|
|
end
|
|
return luci.fs.readfile(sessionpath .. "/" .. id)
|
|
end
|
|
|
|
|
|
--- Check whether Session environment is sane.
|
|
-- @return Boolean status
|
|
function sane(file)
|
|
return luci.sys.process.info("uid")
|
|
== luci.fs.stat(file or sessionpath, "uid")
|
|
and luci.fs.stat(file or sessionpath, "mode")
|
|
== (file and "rw-------" or "rwx------")
|
|
end
|
|
|
|
|
|
--- Write session data to a session file.
|
|
-- @param id Session identifier
|
|
-- @param data Session data
|
|
function write(id, data)
|
|
if not sane() then
|
|
prepare()
|
|
end
|
|
if not id:match("^%w+$") then
|
|
error("Session ID is not sane!")
|
|
end
|
|
luci.fs.writefile(sessionpath .. "/" .. id, data)
|
|
luci.fs.chmod(sessionpath .. "/" .. id, "a-rwx,u+rw")
|
|
end
|
|
|
|
|
|
--- Kills a session
|
|
-- @param id Session identifier
|
|
function kill(id)
|
|
if not id:match("^%w+$") then
|
|
error("Session ID is not sane!")
|
|
end
|
|
luci.fs.unlink(sessionpath .. "/" .. id)
|
|
end |