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xmpp.chapril.org-ejabberd/src/ejabberd_auth.erl

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%%%----------------------------------------------------------------------
%%% File : ejabberd_auth.erl
%%% Author : Alexey Shchepin <alexey@process-one.net>
%%% Purpose : Authentication
%%% Created : 23 Nov 2002 by Alexey Shchepin <alexey@process-one.net>
%%%
%%%
%%% ejabberd, Copyright (C) 2002-2024 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).
-behaviour(gen_server).
-author('alexey@process-one.net').
-protocol({rfc, 5802}).
%% External exports
-export([start_link/0, host_up/1, host_down/1, config_reloaded/0,
set_password/3, check_password/4,
check_password/6, check_password_with_authmodule/4,
check_password_with_authmodule/6, try_register/3,
get_users/0, get_users/1, password_to_scram/2,
get_users/2, import_info/0,
count_users/1, import/5, import_start/2,
count_users/2, get_password/2,
get_password_s/2, get_password_with_authmodule/2,
user_exists/2, user_exists_in_other_modules/3,
remove_user/2, remove_user/3, plain_password_required/1,
store_type/1, entropy/1, backend_type/1, password_format/1,
which_users_exists/1]).
%% gen_server callbacks
-export([init/1, handle_call/3, handle_cast/2, handle_info/2,
terminate/2, code_change/3]).
-export([auth_modules/1, convert_to_scram/1]).
-include_lib("xmpp/include/scram.hrl").
-include("logger.hrl").
-define(SALT_LENGTH, 16).
-record(state, {host_modules = #{} :: host_modules()}).
-type host_modules() :: #{binary => [module()]}.
-type password() :: binary() | #scram{}.
-type digest_fun() :: fun((binary()) -> binary()).
-export_type([password/0]).
%%%----------------------------------------------------------------------
%%% API
%%%----------------------------------------------------------------------
-type opts() :: [{prefix, binary()} | {from, integer()} |
{to, integer()} | {limit, integer()} |
{offset, integer()}].
-callback start(binary()) -> any().
-callback stop(binary()) -> any().
-callback reload(binary()) -> any().
-callback plain_password_required(binary()) -> boolean().
-callback store_type(binary()) -> plain | external | scram.
-callback set_password(binary(), binary(), password()) ->
{ets_cache:tag(), {ok, password()} | {error, db_failure | not_allowed}}.
-callback remove_user(binary(), binary()) -> ok | {error, db_failure | not_allowed}.
-callback user_exists(binary(), binary()) -> {ets_cache:tag(), boolean() | {error, db_failure}}.
-callback check_password(binary(), binary(), binary(), binary()) -> {ets_cache:tag(), boolean() | {stop, boolean()}}.
-callback try_register(binary(), binary(), password()) ->
{ets_cache:tag(), {ok, password()} | {error, exists | db_failure | not_allowed}}.
-callback get_users(binary(), opts()) -> [{binary(), binary()}].
-callback count_users(binary(), opts()) -> number().
-callback get_password(binary(), binary()) -> {ets_cache:tag(), {ok, password()} | error}.
-callback use_cache(binary()) -> boolean().
-callback cache_nodes(binary()) -> boolean().
-optional_callbacks([reload/1,
set_password/3,
remove_user/2,
user_exists/2,
check_password/4,
try_register/3,
get_users/2,
count_users/2,
get_password/2,
use_cache/1,
cache_nodes/1]).
-spec start_link() -> {ok, pid()} | {error, any()}.
start_link() ->
gen_server:start_link({local, ?MODULE}, ?MODULE, [], []).
init([]) ->
ejabberd_hooks:add(host_up, ?MODULE, host_up, 30),
ejabberd_hooks:add(host_down, ?MODULE, host_down, 80),
ejabberd_hooks:add(config_reloaded, ?MODULE, config_reloaded, 40),
HostModules = lists:foldl(
fun(Host, Acc) ->
Modules = auth_modules(Host),
maps:put(Host, Modules, Acc)
end, #{}, ejabberd_option:hosts()),
lists:foreach(
fun({Host, Modules}) ->
start(Host, Modules)
end, maps:to_list(HostModules)),
init_cache(HostModules),
{ok, #state{host_modules = HostModules}}.
handle_call(Request, From, State) ->
?WARNING_MSG("Unexpected call from ~p: ~p", [From, Request]),
{noreply, State}.
handle_cast({host_up, Host}, #state{host_modules = HostModules} = State) ->
Modules = auth_modules(Host),
start(Host, Modules),
NewHostModules = maps:put(Host, Modules, HostModules),
init_cache(NewHostModules),
{noreply, State#state{host_modules = NewHostModules}};
handle_cast({host_down, Host}, #state{host_modules = HostModules} = State) ->
Modules = maps:get(Host, HostModules, []),
stop(Host, Modules),
NewHostModules = maps:remove(Host, HostModules),
init_cache(NewHostModules),
{noreply, State#state{host_modules = NewHostModules}};
handle_cast(config_reloaded, #state{host_modules = HostModules} = State) ->
NewHostModules =
lists:foldl(
fun(Host, Acc) ->
OldModules = maps:get(Host, HostModules, []),
NewModules = auth_modules(Host),
start(Host, NewModules -- OldModules),
stop(Host, OldModules -- NewModules),
reload(Host, misc:intersection(OldModules, NewModules)),
maps:put(Host, NewModules, Acc)
end, HostModules, ejabberd_option:hosts()),
init_cache(NewHostModules),
{noreply, State#state{host_modules = NewHostModules}};
handle_cast(Msg, State) ->
?WARNING_MSG("Unexpected cast: ~p", [Msg]),
{noreply, State}.
handle_info(Info, State) ->
?WARNING_MSG("Unexpected info: ~p", [Info]),
{noreply, State}.
terminate(_Reason, State) ->
ejabberd_hooks:delete(host_up, ?MODULE, host_up, 30),
ejabberd_hooks:delete(host_down, ?MODULE, host_down, 80),
ejabberd_hooks:delete(config_reloaded, ?MODULE, config_reloaded, 40),
lists:foreach(
fun({Host, Modules}) ->
stop(Host, Modules)
end, maps:to_list(State#state.host_modules)).
code_change(_OldVsn, State, _Extra) ->
{ok, State}.
start(Host, Modules) ->
lists:foreach(fun(M) -> M:start(Host) end, Modules).
stop(Host, Modules) ->
lists:foreach(fun(M) -> M:stop(Host) end, Modules).
reload(Host, Modules) ->
lists:foreach(
fun(M) ->
case erlang:function_exported(M, reload, 1) of
true -> M:reload(Host);
false -> ok
end
end, Modules).
host_up(Host) ->
gen_server:cast(?MODULE, {host_up, Host}).
host_down(Host) ->
gen_server:cast(?MODULE, {host_down, Host}).
config_reloaded() ->
gen_server:cast(?MODULE, config_reloaded).
-spec plain_password_required(binary()) -> boolean().
plain_password_required(Server) ->
lists:any(fun (M) -> M:plain_password_required(Server) end,
auth_modules(Server)).
-spec store_type(binary()) -> plain | scram | external.
store_type(Server) ->
case auth_modules(Server) of
[ejabberd_auth_anonymous] -> external;
Modules ->
lists:foldl(
fun(ejabberd_auth_anonymous, Type) -> Type;
(_, external) -> external;
(M, scram) ->
case M:store_type(Server) of
external -> external;
_ -> scram
end;
(M, plain) ->
M:store_type(Server)
end, plain, Modules)
end.
-spec check_password(binary(), binary(), binary(), binary()) -> boolean().
check_password(User, AuthzId, Server, Password) ->
check_password(User, AuthzId, Server, Password, <<"">>, undefined).
-spec check_password(binary(), binary(), binary(), binary(), binary(),
digest_fun() | undefined) -> boolean().
check_password(User, AuthzId, Server, Password, Digest, DigestGen) ->
case check_password_with_authmodule(
User, AuthzId, Server, Password, Digest, DigestGen) of
{true, _AuthModule} -> true;
false -> false
end.
-spec check_password_with_authmodule(binary(), binary(),
binary(), binary()) -> false | {true, atom()}.
check_password_with_authmodule(User, AuthzId, Server, Password) ->
check_password_with_authmodule(
User, AuthzId, Server, Password, <<"">>, undefined).
-spec check_password_with_authmodule(
binary(), binary(), binary(), binary(), binary(),
digest_fun() | undefined) -> false | {false, atom(), binary()} | {true, atom()}.
check_password_with_authmodule(User, AuthzId, Server, Password, Digest, DigestGen) ->
case validate_credentials(User, Server) of
{ok, LUser, LServer} ->
case {jid:nodeprep(AuthzId), get_is_banned(LUser, LServer)} of
{error, _} ->
false;
{_, {is_banned, BanReason}} ->
{false, 'account-disabled', BanReason};
{LAuthzId, _} ->
untag_stop(
lists:foldl(
fun(Mod, false) ->
case db_check_password(
LUser, LAuthzId, LServer, Password,
Digest, DigestGen, Mod) of
true -> {true, Mod};
false -> false;
{stop, true} -> {stop, {true, Mod}};
{stop, false} -> {stop, false}
end;
(_, Acc) ->
Acc
end, false, auth_modules(LServer)))
end;
_ ->
false
end.
-spec set_password(binary(), binary(), password()) -> ok | {error,
db_failure | not_allowed |
invalid_jid | invalid_password}.
set_password(User, Server, Password) ->
case validate_credentials(User, Server, Password) of
{ok, LUser, LServer} ->
lists:foldl(
fun(M, {error, _}) ->
db_set_password(LUser, LServer, Password, M);
(_, ok) ->
ok
end, {error, not_allowed}, auth_modules(LServer));
Err ->
Err
end.
-spec try_register(binary(), binary(), password()) -> ok | {error,
db_failure | not_allowed | exists |
invalid_jid | invalid_password}.
try_register(User, Server, Password) ->
case validate_credentials(User, Server, Password) of
{ok, LUser, LServer} ->
case user_exists(LUser, LServer) of
true ->
{error, exists};
false ->
case ejabberd_router:is_my_host(LServer) of
true ->
case lists:foldl(
fun(_, ok) ->
ok;
(Mod, _) ->
db_try_register(
LUser, LServer, Password, Mod)
end, {error, not_allowed},
auth_modules(LServer)) of
ok ->
ejabberd_hooks:run(
register_user, LServer, [LUser, LServer]);
{error, _} = Err ->
Err
end;
false ->
{error, not_allowed}
end
end;
Err ->
Err
end.
-spec get_users() -> [{binary(), binary()}].
get_users() ->
lists:flatmap(
fun({Host, Mod}) ->
db_get_users(Host, [], Mod)
end, auth_modules()).
-spec get_users(binary()) -> [{binary(), binary()}].
get_users(Server) ->
get_users(Server, []).
-spec get_users(binary(), opts()) -> [{binary(), binary()}].
get_users(Server, Opts) ->
case jid:nameprep(Server) of
error -> [];
LServer ->
lists:flatmap(
fun(M) -> db_get_users(LServer, Opts, M) end,
auth_modules(LServer))
end.
-spec count_users(binary()) -> non_neg_integer().
count_users(Server) ->
count_users(Server, []).
-spec count_users(binary(), opts()) -> non_neg_integer().
count_users(Server, Opts) ->
case jid:nameprep(Server) of
error -> 0;
LServer ->
lists:sum(
lists:map(
fun(M) -> db_count_users(LServer, Opts, M) end,
auth_modules(LServer)))
end.
-spec get_password(binary(), binary()) -> false | password().
get_password(User, Server) ->
case validate_credentials(User, Server) of
{ok, LUser, LServer} ->
case lists:foldl(
fun(M, error) -> db_get_password(LUser, LServer, M);
(_M, Acc) -> Acc
end, error, auth_modules(LServer)) of
{ok, Password} ->
Password;
error ->
false
end;
_ ->
false
end.
-spec get_password_s(binary(), binary()) -> password().
get_password_s(User, Server) ->
case get_password(User, Server) of
false -> <<"">>;
Password -> Password
end.
-spec get_password_with_authmodule(binary(), binary()) ->
{false | {false, atom(), binary()} | password(), module()}.
get_password_with_authmodule(User, Server) ->
case validate_credentials(User, Server) of
{ok, LUser, LServer} ->
case get_is_banned(LUser, LServer) of
{is_banned, BanReason} ->
{{false, 'account-disabled', BanReason}, module_not_consulted};
not_banned ->
case lists:foldl(
fun(M, {error, _}) ->
{db_get_password(LUser, LServer, M), M};
(_M, Acc) ->
Acc
end, {error, undefined}, auth_modules(LServer)) of
{{ok, Password}, Module} ->
{Password, Module};
{error, Module} ->
{false, Module}
end
end;
_ ->
{false, undefined}
end.
-spec user_exists(binary(), binary()) -> boolean().
user_exists(_User, <<"">>) ->
false;
user_exists(User, Server) ->
case validate_credentials(User, Server) of
{ok, LUser, LServer} ->
{Exists, PerformExternalUserCheck} =
lists:foldl(
fun(M, {Exists0, PerformExternalUserCheck0}) ->
case db_user_exists(LUser, LServer, M) of
{{error, _}, Check} ->
{Exists0, PerformExternalUserCheck0 orelse Check};
{Else, Check2} ->
{Exists0 orelse Else, PerformExternalUserCheck0 orelse Check2}
end
end, {false, false}, auth_modules(LServer)),
case (not Exists) andalso PerformExternalUserCheck andalso
ejabberd_option:auth_external_user_exists_check(Server) andalso
gen_mod:is_loaded(Server, mod_last) of
true ->
case mod_last:get_last_info(User, Server) of
not_found ->
false;
_ ->
true
end;
_ ->
Exists
end;
_ ->
false
end.
-spec user_exists_in_other_modules(atom(), binary(), binary()) -> boolean() | maybe_exists.
user_exists_in_other_modules(Module, User, Server) ->
user_exists_in_other_modules_loop(
auth_modules(Server) -- [Module], User, Server).
user_exists_in_other_modules_loop([], _User, _Server) ->
false;
user_exists_in_other_modules_loop([AuthModule | AuthModules], User, Server) ->
case db_user_exists(User, Server, AuthModule) of
{true, _} ->
true;
{false, _} ->
user_exists_in_other_modules_loop(AuthModules, User, Server);
{{error, _}, _} ->
maybe_exists
end.
-spec which_users_exists(list({binary(), binary()})) -> list({binary(), binary()}).
which_users_exists(USPairs) ->
ByServer = lists:foldl(
fun({User, Server}, Dict) ->
LServer = jid:nameprep(Server),
LUser = jid:nodeprep(User),
case gb_trees:lookup(LServer, Dict) of
none ->
gb_trees:insert(LServer, gb_sets:singleton(LUser), Dict);
{value, Set} ->
gb_trees:update(LServer, gb_sets:add(LUser, Set), Dict)
end
end, gb_trees:empty(), USPairs),
Set = lists:foldl(
fun({LServer, UsersSet}, Results) ->
UsersList = gb_sets:to_list(UsersSet),
lists:foldl(
fun(M, Results2) ->
try M:which_users_exists(LServer, UsersList) of
{error, _} ->
Results2;
Res ->
gb_sets:union(
gb_sets:from_list([{U, LServer} || U <- Res]),
Results2)
catch
_:undef ->
lists:foldl(
fun(U, R2) ->
case user_exists(U, LServer) of
true ->
gb_sets:add({U, LServer}, R2);
_ ->
R2
end
end, Results2, UsersList)
end
end, Results, auth_modules(LServer))
end, gb_sets:empty(), gb_trees:to_list(ByServer)),
gb_sets:to_list(Set).
-spec remove_user(binary(), binary()) -> ok.
remove_user(User, Server) ->
case validate_credentials(User, Server) of
{ok, LUser, LServer} ->
lists:foreach(
fun(Mod) -> db_remove_user(LUser, LServer, Mod) end,
auth_modules(LServer)),
ejabberd_hooks:run(remove_user, LServer, [LUser, LServer]);
_Err ->
ok
end.
-spec remove_user(binary(), binary(), password()) -> ok | {error, atom()}.
remove_user(User, Server, Password) ->
case validate_credentials(User, Server, Password) of
{ok, LUser, LServer} ->
case lists:foldl(
fun (_, ok) ->
ok;
(Mod, _) ->
case db_check_password(
LUser, <<"">>, LServer, Password,
<<"">>, undefined, Mod) of
true ->
db_remove_user(LUser, LServer, Mod);
{stop, true} ->
db_remove_user(LUser, LServer, Mod);
false ->
{error, not_allowed};
{stop, false} ->
{error, not_allowed}
end
end, {error, not_allowed}, auth_modules(Server)) of
ok ->
ejabberd_hooks:run(
remove_user, LServer, [LUser, LServer]);
Err ->
Err
end;
Err ->
Err
end.
%% @doc Calculate informational entropy.
-spec entropy(iodata()) -> float().
entropy(B) ->
case binary_to_list(B) of
"" -> 0.0;
S ->
Set = lists:foldl(fun (C,
[Digit, Printable, LowLetter, HiLetter,
Other]) ->
if C >= $a, C =< $z ->
[Digit, Printable, 26, HiLetter,
Other];
C >= $0, C =< $9 ->
[9, Printable, LowLetter, HiLetter,
Other];
C >= $A, C =< $Z ->
[Digit, Printable, LowLetter, 26,
Other];
C >= 33, C =< 126 ->
[Digit, 33, LowLetter, HiLetter,
Other];
true ->
[Digit, Printable, LowLetter,
HiLetter, 128]
end
end,
[0, 0, 0, 0, 0], S),
length(S) * math:log(lists:sum(Set)) / math:log(2)
end.
-spec backend_type(atom()) -> atom().
backend_type(Mod) ->
case atom_to_list(Mod) of
"ejabberd_auth_" ++ T -> list_to_atom(T);
_ -> Mod
end.
-spec password_format(binary() | global) -> plain | scram.
password_format(LServer) ->
ejabberd_option:auth_password_format(LServer).
get_is_banned(User, Server) ->
case mod_admin_extra:get_ban_details(User, Server) of
[] ->
not_banned;
BanDetails ->
{_, ReasonText} = lists:keyfind("reason", 1, BanDetails),
{is_banned, <<"Account is banned: ", ReasonText/binary>>}
end.
%%%----------------------------------------------------------------------
%%% Backend calls
%%%----------------------------------------------------------------------
-spec db_try_register(binary(), binary(), password(), module()) -> ok | {error, exists | db_failure | not_allowed}.
db_try_register(User, Server, Password, Mod) ->
case erlang:function_exported(Mod, try_register, 3) of
true ->
Password1 = case Mod:store_type(Server) of
scram -> password_to_scram(Server, Password);
_ -> Password
end,
Ret = case use_cache(Mod, Server) of
true ->
ets_cache:update(
cache_tab(Mod), {User, Server}, {ok, Password},
fun() -> Mod:try_register(User, Server, Password1) end,
cache_nodes(Mod, Server));
false ->
ets_cache:untag(Mod:try_register(User, Server, Password1))
end,
case Ret of
{ok, _} -> ok;
{error, _} = Err -> Err
end;
false ->
{error, not_allowed}
end.
-spec db_set_password(binary(), binary(), password(), module()) -> ok | {error, db_failure | not_allowed}.
db_set_password(User, Server, Password, Mod) ->
case erlang:function_exported(Mod, set_password, 3) of
true ->
Password1 = case Mod:store_type(Server) of
scram -> password_to_scram(Server, Password);
_ -> Password
end,
Ret = case use_cache(Mod, Server) of
true ->
ets_cache:update(
cache_tab(Mod), {User, Server}, {ok, Password},
fun() -> Mod:set_password(User, Server, Password1) end,
cache_nodes(Mod, Server));
false ->
ets_cache:untag(Mod:set_password(User, Server, Password1))
end,
case Ret of
{ok, _} -> ok;
{error, _} = Err -> Err
end;
false ->
{error, not_allowed}
end.
db_get_password(User, Server, Mod) ->
UseCache = use_cache(Mod, Server),
case erlang:function_exported(Mod, get_password, 2) of
false when UseCache ->
case ets_cache:lookup(cache_tab(Mod), {User, Server}) of
{ok, exists} -> error;
not_found -> error;
Other -> Other
end;
false ->
error;
true when UseCache ->
ets_cache:lookup(
cache_tab(Mod), {User, Server},
fun() -> Mod:get_password(User, Server) end);
true ->
ets_cache:untag(Mod:get_password(User, Server))
end.
db_user_exists(User, Server, Mod) ->
case db_get_password(User, Server, Mod) of
{ok, _} ->
{true, false};
not_found ->
{false, false};
error ->
case {Mod:store_type(Server), use_cache(Mod, Server)} of
{external, true} ->
Val = case ets_cache:lookup(cache_tab(Mod), {User, Server}, error) of
error ->
ets_cache:update(cache_tab(Mod), {User, Server}, {ok, exists},
fun() ->
case Mod:user_exists(User, Server) of
{CacheTag, true} -> {CacheTag, {ok, exists}};
{CacheTag, false} -> {CacheTag, not_found};
{_, {error, _}} = Err -> Err
end
end);
Other ->
Other
end,
case Val of
{ok, _} ->
{true, Mod /= ejabberd_auth_anonymous} ;
not_found ->
{false, Mod /= ejabberd_auth_anonymous};
error ->
{false, Mod /= ejabberd_auth_anonymous};
{error, _} = Err ->
{Err, Mod /= ejabberd_auth_anonymous}
end;
{external, false} ->
{ets_cache:untag(Mod:user_exists(User, Server)), Mod /= ejabberd_auth_anonymous};
_ ->
{false, false}
end
end.
db_check_password(User, AuthzId, Server, ProvidedPassword,
Digest, DigestFun, Mod) ->
case db_get_password(User, Server, Mod) of
{ok, ValidPassword} ->
match_passwords(ProvidedPassword, ValidPassword, Digest, DigestFun);
error ->
case {Mod:store_type(Server), use_cache(Mod, Server)} of
{external, true} ->
case ets_cache:update(
cache_tab(Mod), {User, Server}, {ok, ProvidedPassword},
fun() ->
case Mod:check_password(
User, AuthzId, Server, ProvidedPassword) of
{CacheTag, true} -> {CacheTag, {ok, ProvidedPassword}};
{CacheTag, {stop, true}} -> {CacheTag, {ok, ProvidedPassword}};
{CacheTag, false} -> {CacheTag, error};
{CacheTag, {stop, false}} -> {CacheTag, error}
end
end) of
{ok, _} ->
true;
error ->
false
end;
{external, false} ->
ets_cache:untag(
Mod:check_password(User, AuthzId, Server, ProvidedPassword));
_ ->
false
end
end.
db_remove_user(User, Server, Mod) ->
case erlang:function_exported(Mod, remove_user, 2) of
true ->
case Mod:remove_user(User, Server) of
ok ->
case use_cache(Mod, Server) of
true ->
ets_cache:delete(cache_tab(Mod), {User, Server},
cache_nodes(Mod, Server));
false ->
ok
end;
{error, _} = Err ->
Err
end;
false ->
{error, not_allowed}
end.
db_get_users(Server, Opts, Mod) ->
case erlang:function_exported(Mod, get_users, 2) of
true ->
Mod:get_users(Server, Opts);
false ->
case use_cache(Mod, Server) of
true ->
ets_cache:fold(
fun({User, S}, {ok, _}, Users) when S == Server ->
[{User, Server}|Users];
(_, _, Users) ->
Users
end, [], cache_tab(Mod));
false ->
[]
end
end.
db_count_users(Server, Opts, Mod) ->
case erlang:function_exported(Mod, count_users, 2) of
true ->
Mod:count_users(Server, Opts);
false ->
case use_cache(Mod, Server) of
true ->
ets_cache:fold(
fun({_, S}, {ok, _}, Num) when S == Server ->
Num + 1;
(_, _, Num) ->
Num
end, 0, cache_tab(Mod));
false ->
0
end
end.
%%%----------------------------------------------------------------------
%%% SCRAM stuff
%%%----------------------------------------------------------------------
is_password_scram_valid(Password, Scram) ->
case jid:resourceprep(Password) of
error ->
false;
_ ->
IterationCount = Scram#scram.iterationcount,
Hash = Scram#scram.hash,
Salt = base64:decode(Scram#scram.salt),
SaltedPassword = scram:salted_password(Hash, Password, Salt, IterationCount),
StoredKey = scram:stored_key(Hash, scram:client_key(Hash, SaltedPassword)),
base64:decode(Scram#scram.storedkey) == StoredKey
end.
password_to_scram(Host, Password) ->
password_to_scram(Host, Password, ?SCRAM_DEFAULT_ITERATION_COUNT).
password_to_scram(_Host, #scram{} = Password, _IterationCount) ->
Password;
password_to_scram(Host, Password, IterationCount) ->
Hash = ejabberd_option:auth_scram_hash(Host),
Salt = p1_rand:bytes(?SALT_LENGTH),
SaltedPassword = scram:salted_password(Hash, Password, Salt, IterationCount),
StoredKey = scram:stored_key(Hash, scram:client_key(Hash, SaltedPassword)),
ServerKey = scram:server_key(Hash, SaltedPassword),
#scram{storedkey = base64:encode(StoredKey),
serverkey = base64:encode(ServerKey),
salt = base64:encode(Salt),
hash = Hash,
iterationcount = IterationCount}.
%%%----------------------------------------------------------------------
%%% Cache stuff
%%%----------------------------------------------------------------------
-spec init_cache(host_modules()) -> ok.
init_cache(HostModules) ->
CacheOpts = cache_opts(),
{True, False} = use_cache(HostModules),
lists:foreach(
fun(Module) ->
ets_cache:new(cache_tab(Module), CacheOpts)
end, True),
lists:foreach(
fun(Module) ->
ets_cache:delete(cache_tab(Module))
end, False).
-spec cache_opts() -> [proplists:property()].
cache_opts() ->
MaxSize = ejabberd_option:auth_cache_size(),
CacheMissed = ejabberd_option:auth_cache_missed(),
LifeTime = ejabberd_option:auth_cache_life_time(),
[{max_size, MaxSize}, {cache_missed, CacheMissed}, {life_time, LifeTime}].
-spec use_cache(host_modules()) -> {True :: [module()], False :: [module()]}.
use_cache(HostModules) ->
{Enabled, Disabled} =
maps:fold(
fun(Host, Modules, Acc) ->
lists:foldl(
fun(Module, {True, False}) ->
case use_cache(Module, Host) of
true ->
{sets:add_element(Module, True), False};
false ->
{True, sets:add_element(Module, False)}
end
end, Acc, Modules)
end, {sets:new(), sets:new()}, HostModules),
{sets:to_list(Enabled), sets:to_list(sets:subtract(Disabled, Enabled))}.
-spec use_cache(module(), binary()) -> boolean().
use_cache(Mod, LServer) ->
case erlang:function_exported(Mod, use_cache, 1) of
true -> Mod:use_cache(LServer);
false ->
ejabberd_option:auth_use_cache(LServer)
end.
-spec cache_nodes(module(), binary()) -> [node()].
cache_nodes(Mod, LServer) ->
case erlang:function_exported(Mod, cache_nodes, 1) of
true -> Mod:cache_nodes(LServer);
false -> ejabberd_cluster:get_nodes()
end.
-spec cache_tab(module()) -> atom().
cache_tab(Mod) ->
list_to_atom(atom_to_list(Mod) ++ "_cache").
%%%----------------------------------------------------------------------
%%% Internal functions
%%%----------------------------------------------------------------------
-spec auth_modules() -> [{binary(), module()}].
auth_modules() ->
lists:flatmap(
fun(Host) ->
[{Host, Mod} || Mod <- auth_modules(Host)]
end, ejabberd_option:hosts()).
-spec auth_modules(binary()) -> [module()].
auth_modules(Server) ->
LServer = jid:nameprep(Server),
Methods = ejabberd_option:auth_method(LServer),
[ejabberd:module_name([<<"ejabberd">>, <<"auth">>,
misc:atom_to_binary(M)])
|| M <- Methods].
-spec match_passwords(password(), password(),
binary(), digest_fun() | undefined) -> boolean().
match_passwords(Password, #scram{} = Scram, <<"">>, undefined) ->
is_password_scram_valid(Password, Scram);
match_passwords(Password, #scram{} = Scram, Digest, DigestFun) ->
StoredKey = base64:decode(Scram#scram.storedkey),
DigRes = if Digest /= <<"">> ->
Digest == DigestFun(StoredKey);
true -> false
end,
if DigRes ->
true;
true ->
StoredKey == Password andalso Password /= <<"">>
end;
match_passwords(ProvidedPassword, ValidPassword, <<"">>, undefined) ->
ProvidedPassword == ValidPassword andalso ProvidedPassword /= <<"">>;
match_passwords(ProvidedPassword, ValidPassword, Digest, DigestFun) ->
DigRes = if Digest /= <<"">> ->
Digest == DigestFun(ValidPassword);
true -> false
end,
if DigRes ->
true;
true ->
ValidPassword == ProvidedPassword andalso ProvidedPassword /= <<"">>
end.
-spec validate_credentials(binary(), binary()) ->
{ok, binary(), binary()} | {error, invalid_jid}.
validate_credentials(User, Server) ->
validate_credentials(User, Server, #scram{}).
-spec validate_credentials(binary(), binary(), password()) ->
{ok, binary(), binary()} | {error, invalid_jid | invalid_password}.
validate_credentials(_User, _Server, <<"">>) ->
{error, invalid_password};
validate_credentials(User, Server, Password) ->
case jid:nodeprep(User) of
error ->
{error, invalid_jid};
LUser ->
case jid:nameprep(Server) of
error ->
{error, invalid_jid};
LServer ->
if is_record(Password, scram) ->
{ok, LUser, LServer};
true ->
case jid:resourceprep(Password) of
error ->
{error, invalid_password};
_ ->
{ok, LUser, LServer}
end
end
end
end.
untag_stop({stop, Val}) -> Val;
untag_stop(Val) -> Val.
import_info() ->
[{<<"users">>, 3}].
import_start(_LServer, mnesia) ->
ejabberd_auth_mnesia:init_db();
import_start(_LServer, _) ->
ok.
import(Server, {sql, _}, mnesia, <<"users">>, Fields) ->
ejabberd_auth_mnesia:import(Server, Fields);
import(_LServer, {sql, _}, sql, <<"users">>, _) ->
ok.
-spec convert_to_scram(binary()) -> {error, any()} | ok.
convert_to_scram(Server) ->
LServer = jid:nameprep(Server),
if
LServer == error;
LServer == <<>> ->
{error, {incorrect_server_name, Server}};
true ->
lists:foreach(
fun({U, S}) ->
case get_password(U, S) of
Pass when is_binary(Pass) ->
SPass = password_to_scram(Server, Pass),
set_password(U, S, SPass);
_ ->
ok
end
end, get_users(LServer)),
ok
end.
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