473 lines
18 KiB
Erlang
473 lines
18 KiB
Erlang
%%%----------------------------------------------------------------------
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%%% File : ejabberd_auth_odbc.erl
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%%% Author : Alexey Shchepin <alexey@process-one.net>
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%%% Purpose : Authentification via ODBC
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%%% Created : 12 Dec 2004 by Alexey Shchepin <alexey@process-one.net>
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%%%
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%%%
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%%% ejabberd, Copyright (C) 2002-2015 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 along
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%%% with this program; if not, write to the Free Software Foundation, Inc.,
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%%% 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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%%%
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%%%----------------------------------------------------------------------
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-module(ejabberd_auth_odbc).
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-behaviour(ejabberd_config).
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-author('alexey@process-one.net').
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-behaviour(ejabberd_auth).
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-export([start/1, set_password/3, check_password/3,
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check_password/5, try_register/3,
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dirty_get_registered_users/0, 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, get_password/2,
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get_password_s/2, is_user_exists/2, remove_user/2,
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remove_user/3, store_type/0, plain_password_required/0,
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convert_to_scram/1, opt_type/1]).
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-include("ejabberd.hrl").
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-include("logger.hrl").
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-define(SALT_LENGTH, 16).
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%%%----------------------------------------------------------------------
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%%% API
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%%%----------------------------------------------------------------------
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start(_Host) -> ok.
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plain_password_required() ->
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case is_scrammed() of
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false -> false;
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true -> true
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end.
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store_type() ->
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case is_scrammed() of
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false -> plain; %% allows: PLAIN DIGEST-MD5 SCRAM
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true -> scram %% allows: PLAIN SCRAM
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end.
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%% @spec (User, Server, Password) -> true | false | {error, Error}
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check_password(User, Server, Password) ->
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LServer = jlib:nameprep(Server),
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LUser = jlib:nodeprep(User),
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if (LUser == error) or (LServer == error) ->
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false;
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(LUser == <<>>) or (LServer == <<>>) ->
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false;
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true ->
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Username = ejabberd_odbc:escape(LUser),
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case is_scrammed() of
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true ->
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try odbc_queries:get_password_scram(LServer, Username) of
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{selected, [<<"password">>, <<"serverkey">>,
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<<"salt">>, <<"iterationcount">>],
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[[StoredKey, ServerKey, Salt, IterationCount]]} ->
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Scram =
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#scram{storedkey = StoredKey,
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serverkey = ServerKey,
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salt = Salt,
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iterationcount = jlib:binary_to_integer(
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IterationCount)},
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is_password_scram_valid(Password, Scram);
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{selected, [<<"password">>, <<"serverkey">>,
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<<"salt">>, <<"iterationcount">>], []} ->
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false; %% Account does not exist
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{error, _Error} ->
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false %% Typical error is that table doesn't exist
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catch
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_:_ ->
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false %% Typical error is database not accessible
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end;
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false ->
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try odbc_queries:get_password(LServer, Username) of
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{selected, [<<"password">>], [[Password]]} ->
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Password /= <<"">>;
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{selected, [<<"password">>], [[_Password2]]} ->
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false; %% Password is not correct
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{selected, [<<"password">>], []} ->
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false; %% Account does not exist
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{error, _Error} ->
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false %% Typical error is that table doesn't exist
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catch
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_:_ ->
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false %% Typical error is database not accessible
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end
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end
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end.
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%% @spec (User, Server, Password, Digest, DigestGen) -> true | false | {error, Error}
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check_password(User, Server, Password, Digest,
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DigestGen) ->
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LServer = jlib:nameprep(Server),
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LUser = jlib:nodeprep(User),
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if (LUser == error) or (LServer == error) ->
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false;
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(LUser == <<>>) or (LServer == <<>>) ->
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false;
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true ->
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case is_scrammed() of
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false ->
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Username = ejabberd_odbc:escape(LUser),
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try odbc_queries:get_password(LServer, Username) of
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%% Account exists, check if password is valid
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{selected, [<<"password">>], [[Passwd]]} ->
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DigRes = if Digest /= <<"">> ->
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Digest == DigestGen(Passwd);
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true -> false
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end,
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if DigRes -> true;
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true -> (Passwd == Password) and (Password /= <<"">>)
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end;
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{selected, [<<"password">>], []} ->
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false; %% Account does not exist
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{error, _Error} ->
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false %% Typical error is that table doesn't exist
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catch
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_:_ ->
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false %% Typical error is database not accessible
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end;
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true ->
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false
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end
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end.
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%% @spec (User::string(), Server::string(), Password::string()) ->
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%% ok | {error, invalid_jid}
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set_password(User, Server, Password) ->
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LServer = jlib:nameprep(Server),
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LUser = jlib:nodeprep(User),
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if (LUser == error) or (LServer == error) ->
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{error, invalid_jid};
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(LUser == <<>>) or (LServer == <<>>) ->
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{error, invalid_jid};
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true ->
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Username = ejabberd_odbc:escape(LUser),
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case is_scrammed() of
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true ->
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Scram = password_to_scram(Password),
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case catch odbc_queries:set_password_scram_t(
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LServer,
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Username,
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ejabberd_odbc:escape(Scram#scram.storedkey),
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ejabberd_odbc:escape(Scram#scram.serverkey),
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ejabberd_odbc:escape(Scram#scram.salt),
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jlib:integer_to_binary(Scram#scram.iterationcount)
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)
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of
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{atomic, ok} -> ok;
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Other -> {error, Other}
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end;
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false ->
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Pass = ejabberd_odbc:escape(Password),
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case catch odbc_queries:set_password_t(LServer,
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Username, Pass)
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of
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{atomic, ok} -> ok;
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Other -> {error, Other}
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end
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end
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end.
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%% @spec (User, Server, Password) -> {atomic, ok} | {atomic, exists} | {error, invalid_jid}
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try_register(User, Server, Password) ->
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LServer = jlib:nameprep(Server),
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LUser = jlib:nodeprep(User),
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if (LUser == error) or (LServer == error) ->
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{error, invalid_jid};
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(LUser == <<>>) or (LServer == <<>>) ->
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{error, invalid_jid};
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true ->
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Username = ejabberd_odbc:escape(LUser),
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case is_scrammed() of
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true ->
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Scram = password_to_scram(Password),
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case catch odbc_queries:add_user_scram(
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LServer,
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Username,
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ejabberd_odbc:escape(Scram#scram.storedkey),
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ejabberd_odbc:escape(Scram#scram.serverkey),
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ejabberd_odbc:escape(Scram#scram.salt),
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jlib:integer_to_binary(Scram#scram.iterationcount)
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) of
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{updated, 1} -> {atomic, ok};
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_ -> {atomic, exists}
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end;
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false ->
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Pass = ejabberd_odbc:escape(Password),
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case catch odbc_queries:add_user(LServer, Username,
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Pass)
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of
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{updated, 1} -> {atomic, ok};
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_ -> {atomic, exists}
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end
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end
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end.
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dirty_get_registered_users() ->
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Servers = ejabberd_config:get_vh_by_auth_method(odbc),
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lists:flatmap(fun (Server) ->
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get_vh_registered_users(Server)
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end,
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Servers).
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get_vh_registered_users(Server) ->
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LServer = jlib:nameprep(Server),
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case catch odbc_queries:list_users(LServer) of
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{selected, [<<"username">>], Res} ->
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[{U, LServer} || [U] <- Res];
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_ -> []
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end.
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get_vh_registered_users(Server, Opts) ->
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LServer = jlib:nameprep(Server),
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case catch odbc_queries:list_users(LServer, Opts) of
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{selected, [<<"username">>], Res} ->
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[{U, LServer} || [U] <- Res];
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_ -> []
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end.
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get_vh_registered_users_number(Server) ->
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LServer = jlib:nameprep(Server),
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case catch odbc_queries:users_number(LServer) of
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{selected, [_], [[Res]]} ->
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jlib:binary_to_integer(Res);
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_ -> 0
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end.
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get_vh_registered_users_number(Server, Opts) ->
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LServer = jlib:nameprep(Server),
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case catch odbc_queries:users_number(LServer, Opts) of
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{selected, [_], [[Res]]} ->
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jlib:binary_to_integer(Res);
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_Other -> 0
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end.
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get_password(User, Server) ->
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LServer = jlib:nameprep(Server),
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LUser = jlib:nodeprep(User),
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if (LUser == error) or (LServer == error) ->
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false;
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(LUser == <<>>) or (LServer == <<>>) ->
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false;
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true ->
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Username = ejabberd_odbc:escape(LUser),
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case is_scrammed() of
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true ->
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case catch odbc_queries:get_password_scram(
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LServer, Username) of
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{selected, [<<"password">>, <<"serverkey">>,
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<<"salt">>, <<"iterationcount">>],
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[[StoredKey, ServerKey, Salt, IterationCount]]} ->
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{jlib:decode_base64(StoredKey),
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jlib:decode_base64(ServerKey),
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jlib:decode_base64(Salt),
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jlib:binary_to_integer(IterationCount)};
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_ -> false
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end;
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false ->
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case catch odbc_queries:get_password(LServer, Username)
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of
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{selected, [<<"password">>], [[Password]]} -> Password;
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_ -> false
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end
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end
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end.
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get_password_s(User, Server) ->
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LServer = jlib:nameprep(Server),
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LUser = jlib:nodeprep(User),
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if (LUser == error) or (LServer == error) ->
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<<"">>;
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(LUser == <<>>) or (LServer == <<>>) ->
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<<"">>;
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true ->
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case is_scrammed() of
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false ->
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Username = ejabberd_odbc:escape(LUser),
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case catch odbc_queries:get_password(LServer, Username) of
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{selected, [<<"password">>], [[Password]]} -> Password;
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_ -> <<"">>
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end;
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true -> <<"">>
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end
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end.
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%% @spec (User, Server) -> true | false | {error, Error}
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is_user_exists(User, Server) ->
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case jlib:nodeprep(User) of
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error -> false;
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LUser ->
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Username = ejabberd_odbc:escape(LUser),
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LServer = jlib:nameprep(Server),
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try odbc_queries:get_password(LServer, Username) of
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{selected, [<<"password">>], [[_Password]]} ->
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true; %% Account exists
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{selected, [<<"password">>], []} ->
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false; %% Account does not exist
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{error, Error} -> {error, Error}
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catch
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_:B -> {error, B}
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end
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end.
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%% @spec (User, Server) -> ok | error
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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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case jlib:nodeprep(User) of
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error -> error;
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LUser ->
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Username = ejabberd_odbc:escape(LUser),
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LServer = jlib:nameprep(Server),
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catch odbc_queries:del_user(LServer, Username),
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ok
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end.
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%% @spec (User, Server, Password) -> ok | error | not_exists | not_allowed
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%% @doc Remove user if the provided password is correct.
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remove_user(User, Server, Password) ->
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LServer = jlib:nameprep(Server),
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LUser = jlib:nodeprep(User),
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if (LUser == error) or (LServer == error) ->
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error;
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(LUser == <<>>) or (LServer == <<>>) ->
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error;
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true ->
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case is_scrammed() of
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true ->
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case check_password(User, Server, Password) of
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true ->
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remove_user(User, Server),
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ok;
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false -> not_allowed
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end;
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false ->
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Username = ejabberd_odbc:escape(LUser),
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Pass = ejabberd_odbc:escape(Password),
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F = fun () ->
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Result = odbc_queries:del_user_return_password(
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LServer, Username, Pass),
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case Result of
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{selected, [<<"password">>],
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[[Password]]} -> ok;
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{selected, [<<"password">>],
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[]} -> not_exists;
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_ -> not_allowed
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end
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end,
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{atomic, Result} = odbc_queries:sql_transaction(
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LServer, F),
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Result
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end
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end.
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%%%
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%%% SCRAM
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%%%
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is_scrammed() ->
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scram ==
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ejabberd_config:get_option({auth_password_format, ?MYNAME},
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fun(V) -> V end).
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password_to_scram(Password) ->
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password_to_scram(Password,
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?SCRAM_DEFAULT_ITERATION_COUNT).
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password_to_scram(Password, IterationCount) ->
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Salt = crypto:rand_bytes(?SALT_LENGTH),
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SaltedPassword = scram:salted_password(Password, Salt,
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IterationCount),
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StoredKey =
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scram:stored_key(scram:client_key(SaltedPassword)),
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ServerKey = scram:server_key(SaltedPassword),
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#scram{storedkey = jlib:encode_base64(StoredKey),
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serverkey = jlib:encode_base64(ServerKey),
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salt = jlib:encode_base64(Salt),
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iterationcount = IterationCount}.
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is_password_scram_valid(Password, Scram) ->
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IterationCount = Scram#scram.iterationcount,
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Salt = jlib:decode_base64(Scram#scram.salt),
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SaltedPassword = scram:salted_password(Password, Salt,
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IterationCount),
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StoredKey =
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scram:stored_key(scram:client_key(SaltedPassword)),
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jlib:decode_base64(Scram#scram.storedkey) == StoredKey.
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-define(BATCH_SIZE, 1000).
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set_password_scram_t(Username,
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StoredKey, ServerKey, Salt, IterationCount) ->
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odbc_queries:update_t(<<"users">>,
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[<<"username">>,
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<<"password">>,
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<<"serverkey">>,
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<<"salt">>,
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<<"iterationcount">>],
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[Username, StoredKey,
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ServerKey, Salt,
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IterationCount],
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[<<"username='">>, Username,
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<<"'">>]).
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convert_to_scram(Server) ->
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LServer = jlib:nameprep(Server),
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if
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LServer == error;
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LServer == <<>> ->
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{error, {incorrect_server_name, Server}};
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true ->
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F = fun () ->
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case ejabberd_odbc:sql_query_t(
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[<<"select username, password from users where "
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"iterationcount=0 limit ">>,
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jlib:integer_to_binary(?BATCH_SIZE),
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<<";">>]) of
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{selected, [<<"username">>, <<"password">>], []} ->
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ok;
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{selected, [<<"username">>, <<"password">>], Rs} ->
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lists:foreach(
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fun([LUser, Password]) ->
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Username = ejabberd_odbc:escape(LUser),
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Scram = password_to_scram(Password),
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set_password_scram_t(
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Username,
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ejabberd_odbc:escape(Scram#scram.storedkey),
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ejabberd_odbc:escape(Scram#scram.serverkey),
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ejabberd_odbc:escape(Scram#scram.salt),
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jlib:integer_to_binary(Scram#scram.iterationcount)
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)
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end, Rs),
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continue;
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Err -> {bad_reply, Err}
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end
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end,
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case odbc_queries:sql_transaction(LServer, F) of
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{atomic, ok} -> ok;
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{atomic, continue} -> convert_to_scram(Server);
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{atomic, Error} -> {error, Error};
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Error -> Error
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end
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end.
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opt_type(auth_password_format) -> fun (V) -> V end;
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opt_type(_) -> [auth_password_format].
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