jiti-meet/resources/prosody-plugins/mod_token_verification.lua

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-- Token authentication
-- Copyright (C) 2021-present 8x8, Inc.
local log = module._log;
local host = module.host;
local st = require "util.stanza";
local um_is_admin = require "core.usermanager".is_admin;
local function is_admin(jid)
return um_is_admin(jid, host);
end
local parentHostName = string.gmatch(tostring(host), "%w+.(%w.+)")();
if parentHostName == nil then
log("error", "Failed to start - unable to get parent hostname");
return;
end
local parentCtx = module:context(parentHostName);
if parentCtx == nil then
log("error",
"Failed to start - unable to get parent context for host: %s",
tostring(parentHostName));
return;
end
local token_util = module:require "token/util".new(parentCtx);
-- no token configuration
if token_util == nil then
return;
end
log("debug",
"%s - starting MUC token verifier app_id: %s app_secret: %s allow empty: %s",
tostring(host), tostring(token_util.appId), tostring(token_util.appSecret),
tostring(token_util.allowEmptyToken));
-- option to disable room modification (sending muc config form) for guest that do not provide token
local require_token_for_moderation;
local function load_config()
require_token_for_moderation = module:get_option_boolean("token_verification_require_token_for_moderation");
end
load_config();
-- verify user and whether he is allowed to join a room based on the token information
local function verify_user(session, stanza)
log("debug", "Session token: %s, session room: %s",
tostring(session.auth_token),
tostring(session.jitsi_meet_room));
-- token not required for admin users
local user_jid = stanza.attr.from;
if is_admin(user_jid) then
log("debug", "Token not required from admin user: %s", user_jid);
return true;
end
log("debug",
"Will verify token for user: %s, room: %s ", user_jid, stanza.attr.to);
if not token_util:verify_room(session, stanza.attr.to) then
log("error", "Token %s not allowed to join: %s",
tostring(session.auth_token), tostring(stanza.attr.to));
session.send(
st.error_reply(
stanza, "cancel", "not-allowed", "Room and token mismatched"));
return false; -- we need to just return non nil
end
log("debug",
"allowed: %s to enter/create room: %s", user_jid, stanza.attr.to);
return true;
end
module:hook("muc-room-pre-create", function(event)
local origin, stanza = event.origin, event.stanza;
log("debug", "pre create: %s %s", tostring(origin), tostring(stanza));
if not verify_user(origin, stanza) then
return true; -- Returning any value other than nil will halt processing of the event
end
end, 99);
module:hook("muc-occupant-pre-join", function(event)
local origin, room, stanza = event.origin, event.room, event.stanza;
log("debug", "pre join: %s %s", tostring(room), tostring(stanza));
if not verify_user(origin, stanza) then
return true; -- Returning any value other than nil will halt processing of the event
end
end, 99);
for event_name, method in pairs {
-- Normal room interactions
["iq-set/bare/http://jabber.org/protocol/muc#owner:query"] = "handle_owner_query_set_to_room" ;
-- Host room
["iq-set/host/http://jabber.org/protocol/muc#owner:query"] = "handle_owner_query_set_to_room" ;
} do
module:hook(event_name, function (event)
local session, stanza = event.origin, event.stanza;
-- if we do not require token we pass it through(default behaviour)
-- or the request is coming from admin (focus)
if not require_token_for_moderation or is_admin(stanza.attr.from) then
return;
end
-- jitsi_meet_room is set after the token had been verified
if not session.auth_token or not session.jitsi_meet_room then
session.send(
st.error_reply(
stanza, "cancel", "not-allowed", "Room modification disabled for guests"));
return true;
end
end, -1); -- the default prosody hook is on -2
end
module:hook_global('config-reloaded', load_config);