mirror of
https://github.com/processone/ejabberd.git
synced 2024-11-22 16:20:52 +01:00
152 lines
4.2 KiB
Erlang
152 lines
4.2 KiB
Erlang
%%%----------------------------------------------------------------------
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%%% File : extauth.erl
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%%% Author : Leif Johansson <leifj@it.su.se>
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%%% Purpose : External authentication using a simple port-driver
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%%% Created : 30 Jul 2004 by Leif Johansson <leifj@it.su.se>
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%%%
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%%%
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%%% ejabberd, Copyright (C) 2002-2010 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., 59 Temple Place, Suite 330, Boston, MA
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%%% 02111-1307 USA
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%%%
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%%%----------------------------------------------------------------------
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-module(extauth).
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-author('leifj@it.su.se').
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-export([start/2,
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stop/1,
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init/2,
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check_password/3,
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set_password/3,
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try_register/3,
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remove_user/2,
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remove_user/3,
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is_user_exists/2]).
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-include("ejabberd.hrl").
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-define(INIT_TIMEOUT, 60000). % Timeout is in milliseconds: 60 seconds == 60000
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-define(CALL_TIMEOUT, 10000). % Timeout is in milliseconds: 10 seconds == 10000
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start(Host, ExtPrg) ->
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lists:foreach(
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fun(This) ->
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spawn(?MODULE, init, [get_process_name(Host, This), ExtPrg])
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end,
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lists:seq(0, get_instances(Host)-1)
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).
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init(ProcessName, ExtPrg) ->
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register(ProcessName, self()),
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process_flag(trap_exit,true),
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Port = open_port({spawn, ExtPrg}, [{packet,2}]),
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loop(Port, ?INIT_TIMEOUT).
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stop(Host) ->
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lists:foreach(
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fun(This) ->
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get_process_name(Host, This) ! stop
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end,
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lists:seq(0, get_instances(Host)-1)
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).
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get_process_name(Host, Integer) ->
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gen_mod:get_module_proc(lists:append([Host, integer_to_list(Integer)]), eauth).
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check_password(User, Server, Password) ->
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call_port(Server, ["auth", User, Server, Password]).
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is_user_exists(User, Server) ->
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call_port(Server, ["isuser", User, Server]).
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set_password(User, Server, Password) ->
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call_port(Server, ["setpass", User, Server, Password]).
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try_register(User, Server, Password) ->
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case call_port(Server, ["tryregister", User, Server, Password]) of
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true -> {atomic, ok};
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false -> {error, not_allowed}
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end.
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remove_user(User, Server) ->
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call_port(Server, ["removeuser", User, Server]).
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remove_user(User, Server, Password) ->
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call_port(Server, ["removeuser3", User, Server, Password]).
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call_port(Server, Msg) ->
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LServer = jlib:nameprep(Server),
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ProcessName = get_process_name(LServer, random_instance(get_instances(LServer))),
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ProcessName ! {call, self(), Msg},
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receive
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{eauth,Result} ->
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Result
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end.
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random_instance(MaxNum) ->
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{A1,A2,A3} = now(),
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random:seed(A1, A2, A3),
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random:uniform(MaxNum) - 1.
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get_instances(Server) ->
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case ejabberd_config:get_local_option({extauth_instances, Server}) of
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Num when is_integer(Num) -> Num;
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_ -> 1
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end.
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loop(Port, Timeout) ->
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receive
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{call, Caller, Msg} ->
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Port ! {self(), {command, encode(Msg)}},
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receive
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{Port, {data, Data}} ->
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?DEBUG("extauth call '~p' received data response:~n~p", [Msg, Data]),
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Caller ! {eauth, decode(Data)};
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{Port, Other} ->
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?ERROR_MSG("extauth call '~p' received strange response:~n~p", [Msg, Other]),
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Caller ! {eauth, false}
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after
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Timeout ->
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?ERROR_MSG("extauth call '~p' didn't receive response", [Msg]),
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Caller ! {eauth, false}
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end,
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loop(Port, ?CALL_TIMEOUT);
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stop ->
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Port ! {self(), close},
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receive
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{Port, closed} ->
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exit(normal)
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end;
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{'EXIT', Port, Reason} ->
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?CRITICAL_MSG("~p ~n", [Reason]),
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exit(port_terminated)
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end.
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join(List, Sep) ->
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lists:foldl(fun(A, "") -> A;
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(A, Acc) -> Acc ++ Sep ++ A
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end, "", List).
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encode(L) ->
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join(L,":").
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decode([0,0]) ->
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false;
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decode([0,1]) ->
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true.
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