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%%%----------------------------------------------------------------------
%%% File : cyrsasl_anonymous.erl
%%% Author : Magnus Henoch <henoch@dtek.chalmers.se>
%%% Purpose : ANONYMOUS SASL mechanism
%%% See http://www.ietf.org/internet-drafts/draft-ietf-sasl-anon-05.txt
%%% Created : 23 Aug 2005 by Magnus Henoch <henoch@dtek.chalmers.se>
%%%
%%%
%%% ejabberd, Copyright (C) 2002-2011 ProcessOne
%%%
%%% 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., 59 Temple Place, Suite 330, Boston, MA
%%% 02111-1307 USA
%%%
%%%----------------------------------------------------------------------
-module(cyrsasl_anonymous).
-export([start/1, stop/0, mech_new/1, mech_step/2]).
-include("cyrsasl.hrl").
-behaviour(cyrsasl).
%% @type mechstate() = {state, Server}
%% Server = string().
-record(state, {server}).
%% @spec (Opts) -> true
%% Opts = term()
start(_Opts) ->
cyrsasl:register_mechanism("ANONYMOUS", ?MODULE, false),
ok.
%% @spec () -> ok
stop() ->
ok.
mech_new(#sasl_params{host=Host}) ->
{ok, #state{server = Host}}.
%% @spec (State, ClientIn) -> Ok | Error
%% State = mechstate()
%% ClientIn = string()
%% Ok = {ok, Props}
%% Props = [Prop]
%% Prop = {username, Username} | {auth_module, AuthModule}
%% Username = string()
%% AuthModule = ejabberd_auth_anonymous
%% Error = {error, 'not-authorized'}
mech_step(State, _ClientIn) ->
%% We generate a random username:
User = lists:concat([randoms:get_string() | tuple_to_list(now())]),
Server = State#state.server,
%% Checks that the username is available
case ejabberd_auth:is_user_exists(User, Server) of
true -> {error, 'not-authorized'};
false -> {ok, [{username, User},
{auth_module, ejabberd_auth_anonymous}]}
end.
|
