view mod_turncredentials/mod_turncredentials.lua @ 1146:9fa89dc7a86f

mod_mam_muc: Search the rooms archive correctly (copypaste error from mod_mam)
author Kim Alvefur <zash@zash.se>
date Sat, 10 Aug 2013 21:37:35 +0200
parents 2da546139cb5
children 0b6b33688b75
line wrap: on
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-- XEP-0215 implementation for time-limited turn credentials
-- Copyright (C) 2012-2013 Philipp Hancke
-- This file is MIT/X11 licensed. 

local st = require "util.stanza";
local hmac_sha1 = require "util.hashes".hmac_sha1;
local base64 = require "util.encodings".base64;
local os_time = os.time;
local secret = module:get_option("turncredentials_secret") or false;
local host = module:get_option("turncredentials_host") or false -- use ip addresses here to avoid further dns lookup latency
local port = module:get_option("turncredentials_port") or 3478
if not (secret and host) then
    module:log("error", "turncredentials not configured");
    return;
end

module:hook("iq/host/urn:xmpp:extdisco:1:services", function(event)
    local origin, stanza = event.origin, event.stanza;
    if stanza.attr.type ~= "get" or stanza.tags[1].name ~= "services" or origin.type ~= "c2s" then
        return;
    end
    local now = os_time();
    local userpart = tostring(now);
    local nonce = base64.encode(hmac_sha1(secret, tostring(userpart), false));
    origin.send(st.reply(stanza):tag("services", {xmlns = "urn:xmpp:extdisco:1"})
        :tag("service", { type = "stun", host = host, port = port }):up()
        :tag("service", { type = "turn", host = host, port = port, username = userpart, password = nonce }):up()
    );
    return true;
end);