prosody-modules
fe8222112cf4
mod_turncredentials/mod_turncredentials.lua

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mod_turncredentials/mod_turncredentials.lua @ 6199:fe8222112cf4

mod_conversejs: Serve base app at / This makes things slightly less awkward for the browser to figure out which URLs belong to a PWA. The app's "start URL" was previously without the '/' and therefore was not considered within the scope of the PWA. Now the canonical app URL will always have a '/'. Prosody/mod_http should take care of redirecting existing links without the trailing / to the new URL. If you have an installation at https://prosody/conversejs then it is now at https://prosody/conversejs/ (the first URL will now redirect to the second URL if you use it). The alternative would be to make the PWA scope include the parent, i.e. the whole of https://prosody/ in this case. This might get messy if other PWAs are provided by the same site or Prosody installation, however.
author Matthew Wild <mwild1@gmail.com>
date Tue, 11 Feb 2025 13:18:38 +0000
parent 3977:bbfcd786cc78
line wrap: on
line source

-- 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 datetime = require "util.datetime".datetime;
local secret = module:get_option_string("turncredentials_secret");
local host = module:get_option_string("turncredentials_host"); -- use ip addresses here to avoid further dns lookup latency
local port = module:get_option_number("turncredentials_port", 3478);
local ttl = module:get_option_number("turncredentials_ttl", 86400);
if not (secret and host) then
    module:log("error", "turncredentials not configured");
    return;
end

module:add_feature("urn:xmpp:extdisco:1");

module:hook("iq-get/host/urn:xmpp:extdisco:1:services", function(event)
    local origin, stanza = event.origin, event.stanza;
    if origin.type ~= "c2s" then
        return;
    end
    local expires_at = os_time() + ttl;
    local userpart = tostring(expires_at);
    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 = ("%d"):format(port) }):up()
        :tag("service", { type = "turn", host = host, port = ("%d"):format(port), username = userpart, password = nonce, ttl = ("%d"):format(ttl) }):up()
    );
    return true;
end);

module:add_feature("urn:xmpp:extdisco:2");

module:hook("iq-get/host/urn:xmpp:extdisco:2:services", function(event)
    local origin, stanza = event.origin, event.stanza;
    if origin.type ~= "c2s" then
        return;
    end
    local expires_at = os_time() + ttl;
    local userpart = tostring(expires_at);
    local nonce = base64.encode(hmac_sha1(secret, tostring(userpart), false));
    origin.send(st.reply(stanza):tag("services", {xmlns = "urn:xmpp:extdisco:2"})
        :tag("service", { type = "stun", transport = "udp", host = host, port = ("%d"):format(port) }):up()
        :tag("service", { type = "stun", transport = "tcp", host = host, port = ("%d"):format(port) }):up()
        :tag("service", { type = "turn", transport = "udp", host = host, port = ("%d"):format(port), username = userpart, password = nonce, expires = datetime(expires_at), restricted = "1"  }):up()
        :tag("service", { type = "turn", transport = "tcp", host = host, port = ("%d"):format(port), username = userpart, password = nonce, expires = datetime(expires_at), restricted = "1"  }):up()
    );
    return true;
end);