| 1 |
|
%%%---------------------------------------------------------------------- |
| 2 |
|
%%% File : cyrsasl_anonymous.erl |
| 3 |
|
%%% Author : Magnus Henoch <henoch@dtek.chalmers.se> |
| 4 |
|
%%% Purpose : ANONYMOUS SASL mechanism |
| 5 |
|
%%% See http://www.ietf.org/internet-drafts/draft-ietf-sasl-anon-05.txt |
| 6 |
|
%%% Created : 23 Aug 2005 by Magnus Henoch <henoch@dtek.chalmers.se> |
| 7 |
|
%%% |
| 8 |
|
%%% |
| 9 |
|
%%% ejabberd, Copyright (C) 2002-2011 ProcessOne |
| 10 |
|
%%% |
| 11 |
|
%%% This program is free software; you can redistribute it and/or |
| 12 |
|
%%% modify it under the terms of the GNU General Public License as |
| 13 |
|
%%% published by the Free Software Foundation; either version 2 of the |
| 14 |
|
%%% License, or (at your option) any later version. |
| 15 |
|
%%% |
| 16 |
|
%%% This program is distributed in the hope that it will be useful, |
| 17 |
|
%%% but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 |
|
%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 19 |
|
%%% General Public License for more details. |
| 20 |
|
%%% |
| 21 |
|
%%% You should have received a copy of the GNU General Public License |
| 22 |
|
%%% along with this program; if not, write to the Free Software |
| 23 |
|
%%% Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 24 |
|
%%% |
| 25 |
|
%%%---------------------------------------------------------------------- |
| 26 |
|
|
| 27 |
|
-module(cyrsasl_anonymous). |
| 28 |
|
-xep([{xep, 175}, {version, "1.2"}]). |
| 29 |
|
-export([mechanism/0, mech_new/3, mech_step/2]). |
| 30 |
|
|
| 31 |
|
-ignore_xref([mech_new/3]). |
| 32 |
|
|
| 33 |
|
-behaviour(cyrsasl). |
| 34 |
|
|
| 35 |
|
-record(state, {creds}). |
| 36 |
|
|
| 37 |
|
-spec mechanism() -> cyrsasl:mechanism(). |
| 38 |
|
mechanism() -> |
| 39 |
5831 |
<<"ANONYMOUS">>. |
| 40 |
|
|
| 41 |
|
-spec mech_new(Host :: jid:server(), |
| 42 |
|
Creds :: mongoose_credentials:t(), |
| 43 |
|
Socket :: term()) -> {ok, tuple()}. |
| 44 |
|
mech_new(_Host, Creds, _Socket) -> |
| 45 |
2 |
{ok, #state{creds = Creds}}. |
| 46 |
|
|
| 47 |
|
-spec mech_step(State :: tuple(), ClientIn :: binary()) -> R when |
| 48 |
|
R :: {ok, mongoose_credentials:t()} | {error, binary()}. |
| 49 |
|
mech_step(#state{creds = Creds}, _ClientIn) -> |
| 50 |
|
%% We generate a random username: |
| 51 |
2 |
User = <<(mongoose_bin:gen_from_crypto())/binary, |
| 52 |
|
(integer_to_binary(erlang:unique_integer([positive])))/binary>>, |
| 53 |
|
%% Checks that the username is available |
| 54 |
2 |
JID = jid:make_bare(User, mongoose_credentials:lserver(Creds)), |
| 55 |
2 |
case ejabberd_auth:does_user_exist(JID) of |
| 56 |
:-( |
true -> {error, <<"not-authorized">>}; |
| 57 |
2 |
false -> {ok, mongoose_credentials:extend(Creds, [{username, User}, |
| 58 |
|
{auth_module, ?MODULE}])} |
| 59 |
|
end. |