mirror of
https://github.com/processone/ejabberd.git
synced 2024-11-22 16:20:52 +01:00
335 lines
10 KiB
Erlang
335 lines
10 KiB
Erlang
%%%----------------------------------------------------------------------
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%%% File : ejabberd_auth.erl
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%%% Author : Alexey Shchepin <alexey@process-one.net>
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%%% Purpose : Authentification
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%%% Created : 23 Nov 2002 by Alexey Shchepin <alexey@process-one.net>
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%%%
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%%%
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%%% ejabberd, Copyright (C) 2002-2009 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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%% TODO: Use the functions in ejabberd auth to add and remove users.
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-module(ejabberd_auth).
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-author('alexey@process-one.net').
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%% External exports
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-export([start/0,
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set_password/3,
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check_password/3,
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check_password/5,
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check_password_with_authmodule/3,
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check_password_with_authmodule/5,
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try_register/3,
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dirty_get_registered_users/0,
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get_vh_registered_users/1,
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get_vh_registered_users/2,
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get_vh_registered_users_number/1,
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get_vh_registered_users_number/2,
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get_password/2,
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get_password_s/2,
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get_password_with_authmodule/2,
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is_user_exists/2,
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is_user_exists_in_other_modules/3,
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remove_user/2,
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remove_user/3,
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plain_password_required/1
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]).
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-export([auth_modules/1]).
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-include("ejabberd.hrl").
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%%%----------------------------------------------------------------------
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%%% API
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%%%----------------------------------------------------------------------
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start() ->
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lists:foreach(
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fun(Host) ->
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lists:foreach(
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fun(M) ->
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M:start(Host)
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end, auth_modules(Host))
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end, ?MYHOSTS).
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plain_password_required(Server) ->
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lists:any(
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fun(M) ->
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M:plain_password_required()
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end, auth_modules(Server)).
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%% @doc Check if the user and password can login in server.
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%% @spec (User::string(), Server::string(), Password::string()) ->
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%% true | false
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check_password(User, Server, Password) ->
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case check_password_with_authmodule(User, Server, Password) of
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{true, _AuthModule} -> true;
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false -> false
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end.
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%% @doc Check if the user and password can login in server.
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%% @spec (User::string(), Server::string(), Password::string(),
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%% Digest::string(), DigestGen::function()) ->
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%% true | false
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check_password(User, Server, Password, Digest, DigestGen) ->
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case check_password_with_authmodule(User, Server, Password,
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Digest, DigestGen) of
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{true, _AuthModule} -> true;
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false -> false
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end.
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%% @doc Check if the user and password can login in server.
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%% The user can login if at least an authentication method accepts the user
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%% and the password.
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%% The first authentication method that accepts the credentials is returned.
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%% @spec (User::string(), Server::string(), Password::string()) ->
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%% {true, AuthModule} | false
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%% where
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%% AuthModule = ejabberd_auth_anonymous | ejabberd_auth_external
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%% | ejabberd_auth_internal | ejabberd_auth_ldap
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%% | ejabberd_auth_odbc | ejabberd_auth_pam
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check_password_with_authmodule(User, Server, Password) ->
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check_password_loop(auth_modules(Server), [User, Server, Password]).
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check_password_with_authmodule(User, Server, Password, Digest, DigestGen) ->
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check_password_loop(auth_modules(Server), [User, Server, Password,
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Digest, DigestGen]).
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check_password_loop([], _Args) ->
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false;
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check_password_loop([AuthModule | AuthModules], Args) ->
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case apply(AuthModule, check_password, Args) of
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true ->
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{true, AuthModule};
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false ->
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check_password_loop(AuthModules, Args)
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end.
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%% @spec (User::string(), Server::string(), Password::string()) ->
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%% ok | {error, ErrorType}
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%% where ErrorType = empty_password | not_allowed | invalid_jid
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set_password(_User, _Server, "") ->
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%% We do not allow empty password
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{error, empty_password};
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set_password(User, Server, Password) ->
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lists:foldl(
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fun(M, {error, _}) ->
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M:set_password(User, Server, Password);
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(_M, Res) ->
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Res
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end, {error, not_allowed}, auth_modules(Server)).
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%% @spec (User, Server, Password) -> {atomic, ok} | {atomic, exists} | {error, not_allowed}
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try_register(_User, _Server, "") ->
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%% We do not allow empty password
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{error, not_allowed};
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try_register(User, Server, Password) ->
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case is_user_exists(User,Server) of
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true ->
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{atomic, exists};
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false ->
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case lists:member(jlib:nameprep(Server), ?MYHOSTS) of
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true ->
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Res = lists:foldl(
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fun(_M, {atomic, ok} = Res) ->
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Res;
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(M, _) ->
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M:try_register(User, Server, Password)
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end, {error, not_allowed}, auth_modules(Server)),
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case Res of
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{atomic, ok} ->
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ejabberd_hooks:run(register_user, Server,
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[User, Server]),
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{atomic, ok};
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_ -> Res
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end;
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false ->
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{error, not_allowed}
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end
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end.
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%% Registered users list do not include anonymous users logged
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dirty_get_registered_users() ->
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lists:flatmap(
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fun(M) ->
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M:dirty_get_registered_users()
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end, auth_modules()).
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%% Registered users list do not include anonymous users logged
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get_vh_registered_users(Server) ->
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lists:flatmap(
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fun(M) ->
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M:get_vh_registered_users(Server)
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end, auth_modules(Server)).
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get_vh_registered_users(Server, Opts) ->
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lists:flatmap(
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fun(M) ->
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case erlang:function_exported(
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M, get_vh_registered_users, 2) of
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true ->
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M:get_vh_registered_users(Server, Opts);
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false ->
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M:get_vh_registered_users(Server)
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end
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end, auth_modules(Server)).
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get_vh_registered_users_number(Server) ->
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lists:sum(
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lists:map(
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fun(M) ->
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case erlang:function_exported(
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M, get_vh_registered_users_number, 1) of
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true ->
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M:get_vh_registered_users_number(Server);
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false ->
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length(M:get_vh_registered_users(Server))
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end
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end, auth_modules(Server))).
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get_vh_registered_users_number(Server, Opts) ->
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lists:sum(
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lists:map(
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fun(M) ->
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case erlang:function_exported(
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M, get_vh_registered_users_number, 2) of
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true ->
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M:get_vh_registered_users_number(Server, Opts);
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false ->
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length(M:get_vh_registered_users(Server))
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end
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end, auth_modules(Server))).
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%% @doc Get the password of the user.
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%% @spec (User::string(), Server::string()) -> Password::string()
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get_password(User, Server) ->
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lists:foldl(
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fun(M, false) ->
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M:get_password(User, Server);
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(_M, Password) ->
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Password
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end, false, auth_modules(Server)).
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get_password_s(User, Server) ->
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case get_password(User, Server) of
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false ->
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"";
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Password ->
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Password
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end.
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%% @doc Get the password of the user and the auth module.
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%% @spec (User::string(), Server::string()) ->
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%% {Password::string(), AuthModule::atom()} | {false, none}
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get_password_with_authmodule(User, Server) ->
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lists:foldl(
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fun(M, {false, _}) ->
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{M:get_password(User, Server), M};
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(_M, {Password, AuthModule}) ->
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{Password, AuthModule}
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end, {false, none}, auth_modules(Server)).
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%% Returns true if the user exists in the DB or if an anonymous user is logged
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%% under the given name
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is_user_exists(User, Server) ->
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lists:any(
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fun(M) ->
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M:is_user_exists(User, Server)
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end, auth_modules(Server)).
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%% Check if the user exists in all authentications module except the module
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%% passed as parameter
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%% @spec (Module::atom(), User, Server) -> true | false | maybe
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is_user_exists_in_other_modules(Module, User, Server) ->
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is_user_exists_in_other_modules_loop(
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auth_modules(Server)--[Module],
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User, Server).
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is_user_exists_in_other_modules_loop([], _User, _Server) ->
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false;
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is_user_exists_in_other_modules_loop([AuthModule|AuthModules], User, Server) ->
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case AuthModule:is_user_exists(User, Server) of
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true ->
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true;
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false ->
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is_user_exists_in_other_modules_loop(AuthModules, User, Server);
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{error, Error} ->
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?DEBUG("The authentication module ~p returned an error~nwhen "
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"checking user ~p in server ~p~nError message: ~p",
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[AuthModule, User, Server, Error]),
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maybe
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end.
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%% @spec (User, Server) -> ok | error | {error, not_allowed}
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%% @doc Remove user.
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%% Note: it may return ok even if there was some problem removing the user.
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remove_user(User, Server) ->
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R = lists:foreach(
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fun(M) ->
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M:remove_user(User, Server)
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end, auth_modules(Server)),
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case R of
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ok -> ejabberd_hooks:run(remove_user, jlib:nameprep(Server), [User, Server]);
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_ -> none
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end,
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R.
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%% @spec (User, Server, Password) -> ok | not_exists | not_allowed | bad_request | error
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%% @doc Try to remove user if the provided password is correct.
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%% The removal is attempted in each auth method provided:
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%% when one returns 'ok' the loop stops;
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%% if no method returns 'ok' then it returns the error message indicated by the last method attempted.
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remove_user(User, Server, Password) ->
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R = lists:foldl(
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fun(_M, ok = Res) ->
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Res;
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(M, _) ->
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M:remove_user(User, Server, Password)
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end, error, auth_modules(Server)),
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case R of
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ok -> ejabberd_hooks:run(remove_user, jlib:nameprep(Server), [User, Server]);
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_ -> none
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end,
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R.
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%%%----------------------------------------------------------------------
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%%% Internal functions
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%%%----------------------------------------------------------------------
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%% Return the lists of all the auth modules actually used in the
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%% configuration
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auth_modules() ->
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lists:usort(
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lists:flatmap(
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fun(Server) ->
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auth_modules(Server)
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end, ?MYHOSTS)).
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%% Return the list of authenticated modules for a given host
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auth_modules(Server) ->
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LServer = jlib:nameprep(Server),
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Method = ejabberd_config:get_local_option({auth_method, LServer}),
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Methods = if
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Method == undefined -> [];
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is_list(Method) -> Method;
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is_atom(Method) -> [Method]
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end,
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[list_to_atom("ejabberd_auth_" ++ atom_to_list(M)) || M <- Methods].
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