%%%----------------------------------------------------------------------
%%% File : cyrsasl_plain.erl
%%% Author : Alexey Shchepin <alexey@sevcom.net>
%%% Purpose : PLAIN SASL mechanism
%%% Created : 8 Mar 2003 by Alexey Shchepin <alexey@sevcom.net>
%%% Id : $Id$
%%%----------------------------------------------------------------------
-module(cyrsasl_plain).
-author('alexey@sevcom.net').
-vsn('$Revision$ ').
-export([start/1, stop/0, mech_new/3, mech_step/2, parse/1]).
-behaviour(cyrsasl).
-record(state, {check_password}).
start(_Opts) ->
cyrsasl:register_mechanism("PLAIN", ?MODULE, false),
ok.
stop() ->
ok.
mech_new(_Host, _GetPassword, CheckPassword) ->
{ok, #state{check_password = CheckPassword}}.
mech_step(State, ClientIn) ->
case parse(ClientIn) of
[AuthzId, User, Password] ->
case (State#state.check_password)(User, Password) of
true ->
{ok, [{username, User}, {authzid, AuthzId}]};
_ ->
{error, "bad-auth"}
end;
_ ->
{error, "bad-protocol"}
end.
parse(S) ->
parse1(S, "", []).
parse1([0 | Cs], S, T) ->
parse1(Cs, "", [lists:reverse(S) | T]);
parse1([C | Cs], S, T) ->
parse1(Cs, [C | S], T);
%parse1([], [], T) ->
% lists:reverse(T);
parse1([], S, T) ->
lists:reverse([lists:reverse(S) | T]).
