%%%-------------------------------------------------------------------
%%% File : ejabberd_auth_pam.erl
%%% Author : Evgeniy Khramtsov <xram@jabber.ru>
%%% Purpose : PAM authentication
%%% Created : 5 Jul 2007 by Evgeniy Khramtsov <xram@jabber.ru>
%%%
%%%
%%% ejabberd, Copyright (C) 2002-2018 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.,
%%% 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
%%%
%%%-------------------------------------------------------------------
-module(ejabberd_auth_pam).
-behaviour(ejabberd_config).
-author('xram@jabber.ru').
-behaviour(ejabberd_auth).
-export([start/1, stop/1, check_password/4,
user_exists/2, store_type/1, plain_password_required/1,
opt_type/1]).
start(_Host) ->
ejabberd:start_app(epam).
stop(_Host) ->
ok.
check_password(User, AuthzId, Host, Password) ->
if AuthzId /= <<>> andalso AuthzId /= User ->
false;
true ->
Service = get_pam_service(Host),
UserInfo = case get_pam_userinfotype(Host) of
username -> User;
jid -> <<User/binary, "@", Host/binary>>
end,
case catch epam:authenticate(Service, UserInfo,
Password)
of
true -> true;
_ -> false
end
end.
user_exists(User, Host) ->
Service = get_pam_service(Host),
UserInfo = case get_pam_userinfotype(Host) of
username -> User;
jid -> <<User/binary, "@", Host/binary>>
end,
case catch epam:acct_mgmt(Service, UserInfo) of
true -> true;
false -> false;
_Err -> {error, db_failure}
end.
plain_password_required(_) -> true.
store_type(_) -> external.
%%====================================================================
%% Internal functions
%%====================================================================
get_pam_service(Host) ->
ejabberd_config:get_option({pam_service, Host}, <<"ejabberd">>).
get_pam_userinfotype(Host) ->
ejabberd_config:get_option({pam_userinfotype, Host}, username).
-spec opt_type(pam_service) -> fun((binary()) -> binary());
(pam_userinfotype) -> fun((username | jid) -> username | jid);
(atom()) -> [atom()].
opt_type(pam_service) -> fun iolist_to_binary/1;
opt_type(pam_userinfotype) ->
fun (username) -> username;
(jid) -> jid
end;
opt_type(_) -> [pam_service, pam_userinfotype].
