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

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%%%-------------------------------------------------------------------
%%% 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]).
-export([oauth_issue_token/3, oauth_list_tokens/0, oauth_revoke_token/1, oauth_list_scopes/0]).
-include("jlib.hrl").
-include("ejabberd.hrl").
-include("logger.hrl").
-include("ejabberd_http.hrl").
-include("ejabberd_web_admin.hrl").
-include("ejabberd_oauth.hrl").
-include("ejabberd_commands.hrl").
%% There are two ways to obtain an oauth token:
%% * Using the web form/api results in the token being generated in behalf of the user providing the user/pass
%% * Using the command line and oauth_issue_token command, the token is generated in behalf of ejabberd' sysadmin
%% (as it has access to ejabberd command line).
-define(EXPIRE, 4294967).
start() ->
DBMod = get_db_backend(),
DBMod:init(),
MaxSize =
ejabberd_config:get_option(
oauth_cache_size,
fun(I) when is_integer(I), I>0 -> I end,
1000),
LifeTime =
ejabberd_config:get_option(
oauth_cache_life_time,
fun(I) when is_integer(I), I>0 -> I end,
timer:hours(1) div 1000),
cache_tab:new(oauth_token,
[{max_size, MaxSize}, {life_time, LifeTime}]),
Expire = expire(),
application:set_env(oauth2, backend, ejabberd_oauth),
application:set_env(oauth2, expiry_time, Expire),
application:start(oauth2),
ChildSpec = {?MODULE, {?MODULE, start_link, []},
transient, 1000, worker, [?MODULE]},
supervisor:start_child(ejabberd_sup, ChildSpec),
ejabberd_commands:register_commands(get_commands_spec()),
ok.
get_commands_spec() ->
[
#ejabberd_commands{name = oauth_issue_token, tags = [oauth],
desc = "Issue an oauth token for the given jid",
module = ?MODULE, function = oauth_issue_token,
args = [{jid, string},{ttl, integer}, {scopes, string}],
policy = restricted,
args_example = ["user@server.com", "connected_users_number;muc_online_rooms"],
args_desc = ["Jid for which issue token",
"Time to live of generated token in seconds",
"List of scopes to allow, separated by ';'"],
result = {result, {tuple, [{token, string}, {scopes, string}, {expires_in, string}]}}
},
#ejabberd_commands{name = oauth_list_tokens, tags = [oauth],
desc = "List oauth tokens, their user and scope, and how many seconds remain until expirity",
module = ?MODULE, function = oauth_list_tokens,
args = [],
policy = restricted,
result = {tokens, {list, {token, {tuple, [{token, string}, {user, string}, {scope, string}, {expires_in, string}]}}}}
},
#ejabberd_commands{name = oauth_list_scopes, tags = [oauth],
desc = "List scopes that can be granted to tokens generated through the command line, together with the commands they allow",
module = ?MODULE, function = oauth_list_scopes,
args = [],
policy = restricted,
result = {scopes, {list, {scope, {tuple, [{scope, string}, {commands, string}]}}}}
},
#ejabberd_commands{name = oauth_revoke_token, tags = [oauth],
desc = "Revoke authorization for a token",
module = ?MODULE, function = oauth_revoke_token,
args = [{token, string}],
policy = restricted,
result = {tokens, {list, {token, {tuple, [{token, string}, {user, string}, {scope, string}, {expires_in, string}]}}}},
result_desc = "List of remaining tokens"
}
].
oauth_issue_token(Jid, TTLSeconds, ScopesString) ->
Scopes = [list_to_binary(Scope) || Scope <- string:tokens(ScopesString, ";")],
case jid:from_string(list_to_binary(Jid)) of
#jid{luser =Username, lserver = Server} ->
case oauth2:authorize_password({Username, Server}, Scopes, admin_generated) of
{ok, {_Ctx,Authorization}} ->
{ok, {_AppCtx2, Response}} = oauth2:issue_token(Authorization, [{expiry_time, TTLSeconds}]),
{ok, AccessToken} = oauth2_response:access_token(Response),
{ok, VerifiedScope} = oauth2_response:scope(Response),
{AccessToken, VerifiedScope, integer_to_list(TTLSeconds) ++ " seconds"};
{error, Error} ->
{error, Error}
end;
error ->
{error, "Invalid JID: " ++ Jid}
end.
oauth_list_tokens() ->
Tokens = mnesia:dirty_match_object(#oauth_token{_ = '_'}),
{MegaSecs, Secs, _MiniSecs} = os:timestamp(),
TS = 1000000 * MegaSecs + Secs,
[{Token, jid:to_string(jid:make(U,S,<<>>)), Scope, integer_to_list(Expires - TS) ++ " seconds"} ||
#oauth_token{token=Token, scope=Scope, us= {U,S},expire=Expires} <- Tokens].
oauth_revoke_token(Token) ->
ok = mnesia:dirty_delete(oauth_token, list_to_binary(Token)),
oauth_list_tokens().
oauth_list_scopes() ->
[ {Scope, string:join([atom_to_list(Cmd) || Cmd <- Cmds], ",")} || {Scope, Cmds} <- dict:to_list(get_cmd_scopes())].
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,
DBMod = get_db_backend(),
DBMod:clean(TS),
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}.
get_client_identity(Client, Ctx) -> {ok, {Ctx, {client, Client}}}.
verify_redirection_uri(_, _, Ctx) -> {ok, Ctx}.
authenticate_user({User, Server}, Ctx) ->
case jid:make(User, Server, <<"">>) of
#jid{} = JID ->
Access =
ejabberd_config:get_option(
{oauth_access, JID#jid.lserver},
fun(A) -> A end,
none),
case acl:match_rule(JID#jid.lserver, Access, JID) of
allow ->
case Ctx of
{password, Password} ->
case ejabberd_auth:check_password(User, <<"">>, Server, Password) of
true ->
{ok, {Ctx, {user, User, Server}}};
false ->
{error, badpass}
end;
admin_generated ->
{ok, {Ctx, {user, User, Server}}}
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_exposed_commands(),
Cmds1 = ['ejabberd:user', 'ejabberd:admin', 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}.
get_cmd_scopes() ->
ScopeMap = lists:foldl(fun(Cmd, Accum) ->
case ejabberd_commands:get_command_policy_and_scope(Cmd) of
{ok, Policy, Scopes} when Policy =/= restricted ->
lists:foldl(fun(Scope, Accum2) ->
dict:append(Scope, Cmd, Accum2)
end, Accum, Scopes);
_ -> Accum
end end, dict:new(), ejabberd_commands:get_exposed_commands()),
ScopeMap.
%% This is callback for oauth tokens generated through the command line. Only open and admin commands are
%% made available.
%verify_client_scope({client, ejabberd_ctl}, Scope, Ctx) ->
% RegisteredScope = dict:fetch_keys(get_cmd_scopes()),
% 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.
-spec seconds_since_epoch(integer()) -> non_neg_integer().
seconds_since_epoch(Diff) ->
{Mega, Secs, _} = os:timestamp(),
Mega * 1000000 + Secs + Diff.
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, <<"">>),
Expire = case proplists:get_value(expiry_time, AppContext, undefined) of
undefined ->
proplists:get_value(<<"expiry_time">>, Context, 0);
ExpiresIn ->
%% There is no clean way in oauth2 lib to actually override the TTL of the generated token.
%% It always pass the global configured value. Here we use the app context to pass the per-case
%% ttl if we want to override it.
seconds_since_epoch(ExpiresIn)
end,
{user, User, Server} = proplists:get_value(<<"resource_owner">>, Context, <<"">>),
Scope = proplists:get_value(<<"scope">>, Context, []),
R = #oauth_token{
token = AccessToken,
us = {jid:nodeprep(User), jid:nodeprep(Server)},
scope = Scope,
expire = Expire
},
store(R),
{ok, AppContext}.
associate_refresh_token(_RefreshToken, _Context, AppContext) ->
%put(?REFRESH_TOKEN_TABLE, RefreshToken, Context),
{ok, AppContext}.
check_token(User, Server, ScopeList, Token) ->
LUser = jid:nodeprep(User),
LServer = jid:nameprep(Server),
case lookup(Token) of
{ok, #oauth_token{us = {LUser, LServer},
scope = TokenScope,
expire = Expire}} ->
{MegaSecs, Secs, _} = os:timestamp(),
TS = 1000000 * MegaSecs + Secs,
if
Expire > TS ->
TokenScopeSet = oauth2_priv_set:new(TokenScope),
lists:any(fun(Scope) ->
oauth2_priv_set:is_member(Scope, TokenScopeSet) end,
ScopeList);
true ->
{false, expired}
end;
_ ->
{false, not_found}
end.
check_token(ScopeList, Token) ->
case lookup(Token) of
{ok, #oauth_token{us = US,
scope = TokenScope,
expire = Expire}} ->
{MegaSecs, Secs, _} = os:timestamp(),
TS = 1000000 * MegaSecs + Secs,
if
Expire > TS ->
TokenScopeSet = oauth2_priv_set:new(TokenScope),
case lists:any(fun(Scope) ->
oauth2_priv_set:is_member(Scope, TokenScopeSet) end,
ScopeList) of
true -> {ok, user, US};
false -> {false, no_matching_scope}
end;
true ->
{false, expired}
end;
_ ->
{false, not_found}
end.
store(R) ->
cache_tab:insert(
oauth_token, R#oauth_token.token, R,
fun() ->
DBMod = get_db_backend(),
DBMod:store(R)
end).
lookup(Token) ->
cache_tab:lookup(
oauth_token, Token,
fun() ->
DBMod = get_db_backend(),
case DBMod:lookup(Token) of
#oauth_token{} = R -> {ok, R};
_ -> error
end
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 (jid)">>), ?C(<<": ">>)]),
?INPUTID(<<"text">>, <<"username">>, <<"">>),
?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,
?LABEL(<<"ttl">>, [?CT(<<"Token TTL">>), ?CT(<<": ">>)]),
?XAE(<<"select">>, [{<<"name">>, <<"ttl">>}],
[
?XAC(<<"option">>, [{<<"value">>, <<"3600">>}],<<"1 Hour">>),
?XAC(<<"option">>, [{<<"value">>, <<"86400">>}],<<"1 Day">>),
?XAC(<<"option">>, [{<<"value">>, <<"2592000">>}],<<"1 Month">>),
?XAC(<<"option">>, [{<<"selected">>, <<"selected">>},{<<"value">>, <<"31536000">>}],<<"1 Year">>),
?XAC(<<"option">>, [{<<"value">>, <<"315360000">>}],<<"10 Years">>)]),
?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, <<"">>),
StringJID = proplists:get_value(<<"username">>, Q, <<"">>),
#jid{user = Username, server = Server} = jid:from_string(StringJID),
Password = proplists:get_value(<<"password">>, Q, <<"">>),
State = proplists:get_value(<<"state">>, Q, <<"">>),
Scope = str:tokens(SScope, <<" ">>),
TTL = proplists:get_value(<<"ttl">>, Q, <<"">>),
ExpiresIn = case TTL of
<<>> -> undefined;
_ -> jlib:binary_to_integer(TTL)
end,
case oauth2:authorize_password({Username, Server},
ClientId,
RedirectURI,
Scope,
{password, Password}) of
{ok, {_AppContext, Authorization}} ->
{ok, {_AppContext2, Response}} =
oauth2:issue_token(Authorization, [{expiry_time, ExpiresIn} || ExpiresIn /= undefined ]),
{ok, AccessToken} = oauth2_response:access_token(Response),
{ok, Type} = oauth2_response:token_type(Response),
%%Ugly: workardound to return the correct expirity time, given than oauth2 lib doesn't really have
%%per-case expirity time.
Expires = case ExpiresIn of
undefined ->
{ok, Ex} = oauth2_response:expires_in(Response),
Ex;
_ ->
ExpiresIn
end,
{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{method = 'POST', q = Q, lang = _Lang,
path = [_, <<"token">>]}) ->
case proplists:get_value(<<"grant_type">>, Q, <<"">>) of
<<"password">> ->
SScope = proplists:get_value(<<"scope">>, Q, <<"">>),
StringJID = proplists:get_value(<<"username">>, Q, <<"">>),
#jid{user = Username, server = Server} = jid:from_string(StringJID),
Password = proplists:get_value(<<"password">>, Q, <<"">>),
Scope = str:tokens(SScope, <<" ">>),
TTL = proplists:get_value(<<"ttl">>, Q, <<"">>),
ExpiresIn = case TTL of
<<>> -> undefined;
_ -> jlib:binary_to_integer(TTL)
end,
case oauth2:authorize_password({Username, Server},
Scope,
{password, Password}) of
{ok, {_AppContext, Authorization}} ->
{ok, {_AppContext2, Response}} =
oauth2:issue_token(Authorization, [{expiry_time, ExpiresIn} || ExpiresIn /= undefined ]),
{ok, AccessToken} = oauth2_response:access_token(Response),
{ok, Type} = oauth2_response:token_type(Response),
%%Ugly: workardound to return the correct expirity time, given than oauth2 lib doesn't really have
%%per-case expirity time.
Expires = case ExpiresIn of
undefined ->
{ok, Ex} = oauth2_response:expires_in(Response),
Ex;
_ ->
ExpiresIn
end,
{ok, VerifiedScope} = oauth2_response:scope(Response),
json_response(200, {[
{<<"access_token">>, AccessToken},
{<<"token_type">>, Type},
{<<"scope">>, str:join(VerifiedScope, <<" ">>)},
{<<"expires_in">>, Expires}]});
{error, Error} when is_atom(Error) ->
json_error(400, <<"invalid_grant">>, Error)
end;
_OtherGrantType ->
json_error(400, <<"unsupported_grant_type">>, unsupported_grant_type)
end;
process(_Handlers, _Request) ->
ejabberd_web:error(not_found).
-spec get_db_backend() -> module().
get_db_backend() ->
DBType = ejabberd_config:get_option(
oauth_db_type,
fun(T) -> ejabberd_config:v_db(?MODULE, T) end,
mnesia),
list_to_atom("ejabberd_oauth_" ++ atom_to_list(DBType)).
%% Headers as per RFC 6749
json_response(Code, Body) ->
{Code, [{<<"Content-Type">>, <<"application/json;charset=UTF-8">>},
{<<"Cache-Control">>, <<"no-store">>},
{<<"Pragma">>, <<"no-cache">>}],
jiffy:encode(Body)}.
%% OAauth error are defined in:
%% https://tools.ietf.org/html/draft-ietf-oauth-v2-25#section-5.2
json_error(Code, Error, Reason) ->
Desc = json_error_desc(Reason),
Body = {[{<<"error">>, Error},
{<<"error_description">>, Desc}]},
json_response(Code, Body).
json_error_desc(access_denied) -> <<"Access denied">>;
json_error_desc(unsupported_grant_type) -> <<"Unsupported grant type">>;
json_error_desc(invalid_scope) -> <<"Invalid scope">>.
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 acl:access_rules_validator/1;
opt_type(oauth_db_type) ->
fun(T) -> ejabberd_config:v_db(?MODULE, T) end;
opt_type(oauth_cache_life_time) ->
fun (I) when is_integer(I), I > 0 -> I end;
opt_type(oauth_cache_size) ->
fun (I) when is_integer(I), I > 0 -> I end;
opt_type(_) -> [oauth_expire, oauth_access, oauth_db_type].
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