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

%%%-------------------------------------------------------------------
%%% File    : ejabberd_oauth.erl
%%% Author  : Alexey Shchepin <alexey@process-one.net>
%%% Purpose : OAUTH2 support
%%% Created : 20 Mar 2015 by Alexey Shchepin <alexey@process-one.net>
%%%
%%%
%%% ejabberd, Copyright (C) 2002-2016   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., 59 Temple Place, Suite 330, Boston, MA
%%% 02111-1307 USA
%%%
%%%-------------------------------------------------------------------

-module(ejabberd_oauth).

-behaviour(gen_server).

%% gen_server callbacks
-export([init/1, handle_call/3, handle_cast/2,
	 handle_info/2, terminate/2, code_change/3]).

-export([start/0,
         start_link/0,
         get_client_identity/2,
         verify_redirection_uri/3,
         authenticate_user/2,
         authenticate_client/2,
         verify_resowner_scope/3,
         associate_access_code/3,
         associate_access_token/3,
         associate_refresh_token/3,
         check_token/4,
         check_token/2,
         process/2,
         opt_type/1]).

-include("jlib.hrl").

-include("ejabberd.hrl").
-include("logger.hrl").

-include("ejabberd_http.hrl").
-include("ejabberd_web_admin.hrl").

-record(oauth_token, {
          token = {<<"">>, <<"">>} :: {binary(), binary()},
          us = {<<"">>, <<"">>}    :: {binary(), binary()},
          scope = []               :: [binary()],
          expire                   :: integer()
         }).

-define(EXPIRE, 3600).

start() ->
    init_db(mnesia, ?MYNAME),
    Expire = expire(),
    application:set_env(oauth2, backend, ejabberd_oauth),
    application:set_env(oauth2, expiry_time, Expire),
    application:start(oauth2),
    ChildSpec = {?MODULE, {?MODULE, start_link, []},
		 temporary, 1000, worker, [?MODULE]},
    supervisor:start_child(ejabberd_sup, ChildSpec),
    ok.

start_link() ->
    gen_server:start_link({local, ?MODULE}, ?MODULE, [], []).


init([]) ->
    erlang:send_after(expire() * 1000, self(), clean),
    {ok, ok}.

handle_call(_Request, _From, State) ->
    {reply, bad_request, State}.

handle_cast(_Msg, State) -> {noreply, State}.

handle_info(clean, State) ->
    {MegaSecs, Secs, MiniSecs} = os:timestamp(),
    TS = 1000000 * MegaSecs + Secs,
    F = fun() ->
		Ts = mnesia:select(
		       oauth_token,
		       [{#oauth_token{expire = '$1', _ = '_'},
			 [{'<', '$1', TS}],
			 ['$_']}]),
		lists:foreach(fun mnesia:delete_object/1, Ts)
        end,
    mnesia:async_dirty(F),
    erlang:send_after(trunc(expire() * 1000 * (1 + MiniSecs / 1000000)),
                      self(), clean),
    {noreply, State};
handle_info(_Info, State) -> {noreply, State}.

terminate(_Reason, _State) -> ok.

code_change(_OldVsn, State, _Extra) -> {ok, State}.


init_db(mnesia, _Host) ->
    mnesia:create_table(oauth_token,
                        [{disc_copies, [node()]},
                         {attributes,
                          record_info(fields, oauth_token)}]),
    mnesia:add_table_copy(oauth_token, node(), disc_copies);
init_db(_, _) ->
    ok.


get_client_identity(Client, Ctx) -> {ok, {Ctx, {client, Client}}}.

verify_redirection_uri(_, _, Ctx) -> {ok, Ctx}.

authenticate_user({User, Server}, {password, Password} = Ctx) ->
    case jid:make(User, Server, <<"">>) of
        #jid{} = JID ->
            Access =
                ejabberd_config:get_option(
                  {oauth_access, JID#jid.lserver},
                  fun(A) when is_atom(A) -> A end,
                  none),
            case acl:match_rule(JID#jid.lserver, Access, JID) of
                allow ->
                    case ejabberd_auth:check_password(User, <<"">>, Server, Password) of
                        true ->
                            {ok, {Ctx, {user, User, Server}}};
                        false ->
                            {error, badpass}
                    end;
                deny ->
                    {error, badpass}
            end;
        error ->
            {error, badpass}
    end.

authenticate_client(Client, Ctx) -> {ok, {Ctx, {client, Client}}}.

verify_resowner_scope({user, _User, _Server}, Scope, Ctx) ->
    Cmds = ejabberd_commands:get_commands(),
    Cmds1 = [sasl_auth | Cmds],
    RegisteredScope = [atom_to_binary(C, utf8) || C <- Cmds1],
    case oauth2_priv_set:is_subset(oauth2_priv_set:new(Scope),
                                   oauth2_priv_set:new(RegisteredScope)) of
        true ->
            {ok, {Ctx, Scope}};
        false ->
            {error, badscope}
    end;
verify_resowner_scope(_, _, _) ->
    {error, badscope}.


associate_access_code(_AccessCode, _Context, AppContext) ->
    %put(?ACCESS_CODE_TABLE, AccessCode, Context),
    {ok, AppContext}.

associate_access_token(AccessToken, Context, AppContext) ->
    {user, User, Server} =
        proplists:get_value(<<"resource_owner">>, Context, <<"">>),
    Scope = proplists:get_value(<<"scope">>, Context, []),
    Expire = proplists:get_value(<<"expiry_time">>, Context, 0),
    LUser = jid:nodeprep(User),
    LServer = jid:nameprep(Server),
    R = #oauth_token{
      token = AccessToken,
      us = {LUser, LServer},
      scope = Scope,
      expire = Expire
     },
    mnesia:dirty_write(R),
    {ok, AppContext}.

associate_refresh_token(_RefreshToken, _Context, AppContext) ->
    %put(?REFRESH_TOKEN_TABLE, RefreshToken, Context),
    {ok, AppContext}.


check_token(User, Server, Scope, Token) ->
    LUser = jid:nodeprep(User),
    LServer = jid:nameprep(Server),
    case catch mnesia:dirty_read(oauth_token, Token) of
        [#oauth_token{us = {LUser, LServer},
                      scope = TokenScope,
                      expire = Expire}] ->
            {MegaSecs, Secs, _} = os:timestamp(),
            TS = 1000000 * MegaSecs + Secs,
            oauth2_priv_set:is_member(
              Scope, oauth2_priv_set:new(TokenScope)) andalso
                Expire > TS;
        _ ->
            false
    end.

check_token(Scope, Token) ->
    case catch mnesia:dirty_read(oauth_token, Token) of
        [#oauth_token{us = {LUser, LServer},
                      scope = TokenScope,
                      expire = Expire}] ->
            {MegaSecs, Secs, _} = os:timestamp(),
            TS = 1000000 * MegaSecs + Secs,
            case oauth2_priv_set:is_member(
                   Scope, oauth2_priv_set:new(TokenScope)) andalso
                Expire > TS of
                true -> {ok, LUser, LServer};
                false -> false
            end;
        _ ->
            false
    end.


expire() ->
    ejabberd_config:get_option(
      oauth_expire,
      fun(I) when is_integer(I) -> I end,
      ?EXPIRE).

-define(DIV(Class, Els),
	?XAE(<<"div">>, [{<<"class">>, Class}], Els)).
-define(INPUTID(Type, Name, Value),
	?XA(<<"input">>,
	    [{<<"type">>, Type}, {<<"name">>, Name},
	     {<<"value">>, Value}, {<<"id">>, Name}])).
-define(LABEL(ID, Els),
	?XAE(<<"label">>, [{<<"for">>, ID}], Els)).

process(_Handlers,
	#request{method = 'GET', q = Q, lang = Lang,
		 path = [_, <<"authorization_token">>]}) ->
    ResponseType = proplists:get_value(<<"response_type">>, Q, <<"">>),
    ClientId = proplists:get_value(<<"client_id">>, Q, <<"">>),
    RedirectURI = proplists:get_value(<<"redirect_uri">>, Q, <<"">>),
    Scope = proplists:get_value(<<"scope">>, Q, <<"">>),
    State = proplists:get_value(<<"state">>, Q, <<"">>),
    Form =
        ?XAE(<<"form">>,
             [{<<"action">>, <<"authorization_token">>},
              {<<"method">>, <<"post">>}],
             [?LABEL(<<"username">>, [?CT(<<"User">>), ?C(<<": ">>)]),
              ?INPUTID(<<"text">>, <<"username">>, <<"">>),
              ?BR,
              ?LABEL(<<"server">>, [?CT(<<"Server">>), ?C(<<": ">>)]),
              ?INPUTID(<<"text">>, <<"server">>, <<"">>),
              ?BR,
              ?LABEL(<<"password">>, [?CT(<<"Password">>), ?C(<<": ">>)]),
              ?INPUTID(<<"password">>, <<"password">>, <<"">>),
              ?INPUT(<<"hidden">>, <<"response_type">>, ResponseType),
              ?INPUT(<<"hidden">>, <<"client_id">>, ClientId),
              ?INPUT(<<"hidden">>, <<"redirect_uri">>, RedirectURI),
              ?INPUT(<<"hidden">>, <<"scope">>, Scope),
              ?INPUT(<<"hidden">>, <<"state">>, State),
              ?BR,
              ?INPUTT(<<"submit">>, <<"">>, <<"Accept">>)
             ]),
    Top =
        ?DIV(<<"section">>,
             [?DIV(<<"block">>,
                   [?A(<<"https://www.ejabberd.im">>,
                       [?XA(<<"img">>,
                            [{<<"height">>, <<"32">>},
                             {<<"src">>, logo()}])]
                      )])]),
    Middle =
        ?DIV(<<"white section">>,
             [?DIV(<<"block">>,
                   [?XC(<<"h1">>, <<"Authorization request">>),
                    ?XE(<<"p">>,
                        [?C(<<"Application ">>),
                         ?XC(<<"em">>, ClientId),
                         ?C(<<" wants to access scope ">>),
                         ?XC(<<"em">>, Scope)]),
                    Form
                   ])]),
    Bottom =
        ?DIV(<<"section">>,
             [?DIV(<<"block">>,
                   [?XAC(<<"a">>,
                         [{<<"href">>, <<"https://www.ejabberd.im">>},
                          {<<"title">>, <<"ejabberd XMPP server">>}],
                         <<"ejabberd">>),
                    ?C(" is maintained by "),
                    ?XAC(<<"a">>,
                         [{<<"href">>, <<"https://www.process-one.net">>},
                          {<<"title">>, <<"ProcessOne - Leader in Instant Messaging and Push Solutions">>}],
                         <<"ProcessOne">>)
                   ])]),
    Body = ?DIV(<<"container">>, [Top, Middle, Bottom]),
    ejabberd_web:make_xhtml(web_head(), [Body]);
process(_Handlers,
	#request{method = 'POST', q = Q, lang = _Lang,
		 path = [_, <<"authorization_token">>]}) ->
    _ResponseType = proplists:get_value(<<"response_type">>, Q, <<"">>),
    ClientId = proplists:get_value(<<"client_id">>, Q, <<"">>),
    RedirectURI = proplists:get_value(<<"redirect_uri">>, Q, <<"">>),
    SScope = proplists:get_value(<<"scope">>, Q, <<"">>),
    Username = proplists:get_value(<<"username">>, Q, <<"">>),
    Server = proplists:get_value(<<"server">>, Q, <<"">>),
    Password = proplists:get_value(<<"password">>, Q, <<"">>),
    State = proplists:get_value(<<"state">>, Q, <<"">>),
    Scope = str:tokens(SScope, <<" ">>),
    case oauth2:authorize_password({Username, Server},
                                   ClientId,
                                   RedirectURI,
                                   Scope,
                                   {password, Password}) of
        {ok, {_AppContext, Authorization}} ->
            {ok, {_AppContext2, Response}} =
                oauth2:issue_token(Authorization, none),
            {ok, AccessToken} = oauth2_response:access_token(Response),
            {ok, Type} = oauth2_response:token_type(Response),
            {ok, Expires} = oauth2_response:expires_in(Response),
            {ok, VerifiedScope} = oauth2_response:scope(Response),
            %oauth2_wrq:redirected_access_token_response(ReqData,
            %                                            RedirectURI,
            %                                            AccessToken,
            %                                            Type,
            %                                            Expires,
            %                                            VerifiedScope,
            %                                            State,
            %                                            Context);
            {302, [{<<"Location">>,
                    <<RedirectURI/binary,
                     "?access_token=", AccessToken/binary,
                     "&token_type=", Type/binary,
                     "&expires_in=", (integer_to_binary(Expires))/binary,
                     "&scope=", (str:join(VerifiedScope, <<" ">>))/binary,
                     "&state=", State/binary>>
                   }],
             ejabberd_web:make_xhtml([?XC(<<"h1">>, <<"302 Found">>)])};
        {error, Error} when is_atom(Error) ->
            %oauth2_wrq:redirected_error_response(
            %    ReqData, RedirectURI, Error, State, Context)
            {302, [{<<"Location">>,
                    <<RedirectURI/binary,
                     "?error=", (atom_to_binary(Error, utf8))/binary,
                     "&state=", State/binary>>
                   }],
             ejabberd_web:make_xhtml([?XC(<<"h1">>, <<"302 Found">>)])}
    end;
process(_Handlers, _Request) ->
    ejabberd_web:error(not_found).




web_head() ->
    [?XA(<<"meta">>, [{<<"http-equiv">>, <<"X-UA-Compatible">>},
                      {<<"content">>, <<"IE=edge">>}]),
     ?XA(<<"meta">>, [{<<"name">>, <<"viewport">>},
                      {<<"content">>,
                       <<"width=device-width, initial-scale=1">>}]),
     ?XC(<<"title">>, <<"Authorization request">>),
     ?XC(<<"style">>, css())
    ].

css() ->
    <<"
      body {
        margin: 0;
        padding: 0;

        font-family: sans-serif;
        color: #fff;
      }

      h1 {
        font-size: 3em;
        color: #444;
      }

      p {
        line-height: 1.5em;
        color: #888;
      }

      a {
        color: #fff;
      }
        a:hover,
        a:active {
          text-decoration: underline;
        }

      em {
        display: inline-block;
        padding: 0 5px;

        background: #f4f4f4;
        border-radius: 5px;

        font-style: normal;
        font-weight: bold;
        color: #444;
      }

      form {
        color: #444;
      }
        label {
          display: block;
          font-weight: bold;
        }

        input[type=text],
        input[type=password] {
          margin-bottom: 1em;
          padding: 0.4em;

          max-width: 330px;
          width: 100%;

          border: 1px solid #c4c4c4;
          border-radius: 5px;
          outline: 0;

          font-size: 1.2em;
        }
          input[type=text]:focus,
          input[type=password]:focus,
          input[type=text]:active,
          input[type=password]:active {
            border-color: #41AFCA;
          }

        input[type=submit] {
          font-size: 1em;
        }

      .container {
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;

        background: #424A55;
        background-image: -webkit-linear-gradient(270deg, rgba(48,52,62,0) 24%, #30353e 100%);
        background-image: linear-gradient(-180deg, rgba(48,52,62,0) 24%, #30353e 100%);
      }

      .section {
        padding: 3em;
      }
        .white.section {
          background: #fff;
          border-bottom: 4px solid #41AFCA;
        }

        .white.section a {
          text-decoration: none;
          color: #41AFCA;
        }
          .white.section a:hover,
          .white.section a:active {
            text-decoration: underline;
          }

      .container > .section { 
          background: #424A55;
      }

      .block {
        margin: 0 auto;
        max-width: 900px;
        width: 100%;
      }
">>.

logo() ->
    <<"data:image/png;base64,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

opt_type(oauth_expire) ->
    fun(I) when is_integer(I), I >= 0 -> I end;
opt_type(oauth_access) ->
    fun(A) when is_atom(A) -> A end;
opt_type(_) -> [oauth_expire, oauth_access].