-- sasl.lua v0.4
--- Copyright (C) 2008-2009 Tobias Markmann
+-- Copyright (C) 2008-2010 Tobias Markmann
--
-- All rights reserved.
--
--=========================
--SASL DIGEST-MD5 according to RFC 2831
-local function digest_response()
-
- return response, A1, A2
-end
+
+--[[
+Supported Authentication Backends
+
+digest_md5:
+ function(username, domain, realm, encoding) -- domain and realm are usually the same; for some broken
+ -- implementations it's not
+ return digesthash, state;
+ end
+
+digest_md5_test:
+ function(username, domain, realm, encoding, digesthash)
+ return true or false, state;
+ end
+]]
local function digest(self, message)
--TODO complete support for authzid
local function serialize(message)
local data = ""
- if type(message) ~= "table" then error("serialize needs an argument of type table.") end
-
-- testing all possible values
if message["realm"] then data = data..[[realm="]]..message.realm..[[",]] end
if message["nonce"] then data = data..[[nonce="]]..message.nonce..[[",]] end
local function parse(data)
local message = {}
-- COMPAT: %z in the pattern to work around jwchat bug (sends "charset=utf-8\0")
- for k, v in gmatch(data, [[([%w%-]+)="?([^",%z]*)"?,?]]) do -- FIXME The hacky regex makes me shudder
+ for k, v in s_gmatch(data, [[([%w%-]+)="?([^",%z]*)"?,?]]) do -- FIXME The hacky regex makes me shudder
message[k] = v;
end
return message;
--TODO maybe realm support
self.username = response["username"];
+ local Y, state;
if self.profile.plain then
local password, state = self.profile.plain(response["username"], self.realm)
if state == nil then return "failure", "not-authorized"
elseif state == false then return "failure", "account-disabled" end
Y = md5(response["username"]..":"..response["realm"]..":"..password);
elseif self.profile["digest-md5"] then
- local Y, state = self.profile["digest-md5"](response["username"], self.realm, response["realm"], response["charset"])
+ Y, state = self.profile["digest-md5"](response["username"], self.realm, response["realm"], response["charset"])
if state == nil then return "failure", "not-authorized"
elseif state == false then return "failure", "account-disabled" end
elseif self.profile["digest-md5-test"] then
KD = HA1..":"..response["nonce"]..":"..response["nc"]..":"..response["cnonce"]..":"..response["qop"]..":"..HA2
local rspauth = md5(KD, true);
self.authenticated = true;
- return "success", serialize({rspauth = rspauth});
+ --TODO: considering sending the rspauth in a success node for saving one roundtrip; allowed according to http://tools.ietf.org/html/draft-saintandre-rfc3920bis-09#section-7.3.6
+ return "challenge", serialize({rspauth = rspauth});
else
return "failure", "not-authorized", "The response provided by the client doesn't match the one we calculated."
end