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%%%---------------------------------------------------------------------- |
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%%% File : cyrsasl_anonymous.erl |
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%%% Author : Magnus Henoch <henoch@dtek.chalmers.se> |
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%%% Purpose : ANONYMOUS SASL mechanism |
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%%% See http://www.ietf.org/internet-drafts/draft-ietf-sasl-anon-05.txt |
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%%% Created : 23 Aug 2005 by Magnus Henoch <henoch@dtek.chalmers.se> |
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%%% |
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%%% |
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%%% ejabberd, Copyright (C) 2002-2011 ProcessOne |
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%%% |
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%%% This program is free software; you can redistribute it and/or |
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%%% modify it under the terms of the GNU General Public License as |
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%%% published by the Free Software Foundation; either version 2 of the |
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%%% License, or (at your option) any later version. |
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%%% |
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%%% This program is distributed in the hope that it will be useful, |
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%%% but WITHOUT ANY WARRANTY; without even the implied warranty of |
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%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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%%% General Public License for more details. |
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%%% |
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%%% You should have received a copy of the GNU General Public License |
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%%% along with this program; if not, write to the Free Software |
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%%% Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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%%% |
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%%%---------------------------------------------------------------------- |
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-module(cyrsasl_anonymous). |
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-xep([{xep, 175}, {version, "1.2"}]). |
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-export([mechanism/0, mech_new/3, mech_step/2]). |
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-ignore_xref([mech_new/3]). |
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-behaviour(cyrsasl). |
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-record(state, {creds}). |
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-spec mechanism() -> cyrsasl:mechanism(). |
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mechanism() -> |
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5902 |
<<"ANONYMOUS">>. |
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-spec mech_new(Host :: jid:server(), |
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Creds :: mongoose_credentials:t(), |
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Socket :: term()) -> {ok, tuple()}. |
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mech_new(_Host, Creds, _Socket) -> |
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{ok, #state{creds = Creds}}. |
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-spec mech_step(State :: tuple(), ClientIn :: binary()) -> R when |
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R :: {ok, mongoose_credentials:t()} | {error, binary()}. |
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mech_step(#state{creds = Creds}, _ClientIn) -> |
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%% We generate a random username: |
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User = <<(mongoose_bin:gen_from_crypto())/binary, |
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(integer_to_binary(erlang:unique_integer([positive])))/binary>>, |
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%% Checks that the username is available |
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JID = jid:make_bare(User, mongoose_credentials:lserver(Creds)), |
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case ejabberd_auth:does_user_exist(JID) of |
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:-( |
true -> {error, <<"not-authorized">>}; |
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false -> {ok, mongoose_credentials:extend(Creds, [{username, User}, |
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{auth_module, ?MODULE}])} |
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end. |