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%%%---------------------------------------------------------------------- |
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%%% File : cyrsasl_plain.erl |
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%%% Author : Alexey Shchepin <alexey@process-one.net> |
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%%% Purpose : PLAIN SASL mechanism |
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%%% Created : 8 Mar 2003 by Alexey Shchepin <alexey@process-one.net> |
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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_plain). |
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-author('alexey@process-one.net'). |
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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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-include("mongoose.hrl"). |
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-spec mechanism() -> cyrsasl:mechanism(). |
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mechanism() -> |
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9986 |
<<"PLAIN">>. |
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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, Creds}. |
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-spec mech_step(Creds :: mongoose_credentials:t(), |
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ClientIn :: binary()) -> {ok, mongoose_credentials:t()} |
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| {error, binary()}. |
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mech_step(Creds, ClientIn) -> |
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case prepare(ClientIn) of |
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[AuthzId, User, Password] -> |
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Request = mongoose_credentials:extend(Creds, |
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[{username, User}, |
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{password, Password}, |
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{authzid, AuthzId}]), |
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authorize(Request, User); |
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_ -> |
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{error, <<"bad-protocol">>} |
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end. |
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authorize(Request, User) -> |
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case ejabberd_auth:authorize(Request) of |
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{ok, Result} -> |
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{ok, Result}; |
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{error, not_authorized} -> |
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{error, <<"not-authorized">>, User} |
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end. |
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-spec prepare(binary()) -> 'error' | [binary(), ...]. |
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prepare(ClientIn) -> |
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case parse(ClientIn) of |
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[<<>>, UserMaybeDomain, Password] -> |
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case parse_domain(UserMaybeDomain) of |
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%% <NUL>login@domain<NUL>pwd |
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[User, _Domain] -> |
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:-( |
[UserMaybeDomain, |
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User, |
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Password]; |
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%% <NUL>login<NUL>pwd |
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[User] -> |
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[<<>>, User, Password] |
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end; |
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%% login@domain<NUL>login<NUL>pwd |
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[AuthzId, User, Password] -> |
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[AuthzId, User, Password]; |
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_ -> |
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error |
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end. |
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-spec parse(binary()) -> [binary(), ...]. |
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parse(S) -> |
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binary:split(S, <<0>>, [global, trim]). |
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-spec parse_domain(binary()) -> [binary(), ...]. |
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parse_domain(S) -> |
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binary:split(S, <<$@>>, [global, trim]). |