jiti-meet/prosody-plugins/mod_auth_token.lua

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-- Token authentication
-- Copyright (C) 2015 Atlassian
local generate_uuid = require "util.uuid".generate;
local new_sasl = require "util.sasl".new;
local sasl = require "util.sasl";
local formdecode = require "util.http".formdecode;
local token_util = module:require "token/util";
-- define auth provider
local provider = {};
local host = module.host;
local appId = module:get_option_string("app_id");
local appSecret = module:get_option_string("app_secret");
local allowEmptyToken = module:get_option_boolean("allow_empty_token");
if allowEmptyToken == true then
module:log("warn", "WARNING - empty tokens allowed");
end
if appId == nil then
module:log("error", "'app_id' must not be empty");
return;
end
if appSecret == nil then
module:log("error", "'app_secret' must not be empty");
return;
end
-- Extract 'token' param from BOSH URL when session is created
module:hook("bosh-session", function(event)
local session, request = event.session, event.request;
local query = request.url.query;
if query ~= nil then
session.auth_token = query and formdecode(query).token or nil;
end
end)
function provider.test_password(username, password)
return nil, "Password based auth not supported";
end
function provider.get_password(username)
return nil;
end
function provider.set_password(username, password)
return nil, "Set password not supported";
end
function provider.user_exists(username)
return nil;
end
function provider.create_user(username, password)
return nil;
end
function provider.delete_user(username)
return nil;
end
function provider.get_sasl_handler(session)
-- JWT token extracted from BOSH URL
local token = session.auth_token;
local function get_username_from_token(self, message)
if token == nil then
if allowEmptyToken == true then
return true;
else
return false, "not-allowed", "token required";
end
end
-- here we check if 'room' claim exists
local room, roomErr = token_util.get_room_name(token, appSecret);
if room == nil then
return false, "not-allowed", roomErr;
end
-- now verify the whole token
local result, msg
= token_util.verify_token(token, appId, appSecret, room);
if result == true then
-- Binds room name to the session which is later checked on MUC join
session.jitsi_meet_room = room;
return true
else
return false, "not-allowed", msg
end
end
return new_sasl(host, { anonymous = get_username_from_token });
end
module:provides("auth", provider);
local function anonymous(self, message)
local username = generate_uuid();
-- This calls the handler created in 'provider.get_sasl_handler(session)'
local result, err, msg = self.profile.anonymous(self, username, self.realm);
self.username = username;
if result == true then
return "success"
else
return "failure", err, msg
end
end
sasl.registerMechanism("ANONYMOUS", {"anonymous"}, anonymous);