flm01/openwrt/packages/flukso/src/auth.lua

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--
-- auth.lua: property and methods for generating hmac-sha1 authentication
-- Copyright (c) 2009 jokamajo.org
--
-- This program is free software; you can redistribute it and/or
-- modify it under the terms of the GNU General Public License
-- as published by the Free Software Foundation; either version 2
-- 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 General Public License for more details.
--
-- You should have received a copy of the GNU 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.
--
-- $Id$
--
require 'luci.model.uci'
require 'lxyssl'
local string, table, os, luci, lxyssl =
string, table, os, luci, lxyssl
local getfenv, setmetatable, type, pairs, tostring =
getfenv, setmetatable, type, pairs, tostring
module(...)
local modenv = getfenv()
function new()
return setmetatable({}, {__index = modenv})
end
function load(T)
local uci = luci.model.uci.cursor()
uci:foreach ('system', 'system',
function(section)
T.device, T.key, T.version = section.device, section.key, section.version
end
)
end
function hmac(T, M, timestamp)
function string.hex(x)
local t={}
for c in x:gmatch('(.)') do t[#t+1]=string.format('%02x', c:byte()) end
return table.concat(t,'')
end
function serialise(M)
if type(M) == 'table' then
local sequence = ''
for k, v in pairs(M) do
if v ~= nil then
sequence = sequence..tostring(k)..serialise(v)
end
end
return sequence
else
return tostring(M)
end
end
T.timestamp = timestamp or os.time()
T.message = T.timestamp..':'..serialise(M)..':'..T.key -- or T.timestamp..':'..T.nonce..':'..T.key
T.signature = lxyssl.hash('hmac-sha1', T.key):digest(T.message):hex()
T.message, T.key, T.version = nil, nil, nil
end