view mod_turncredentials/mod_turncredentials.lua @ 5255:001c8fdc91a4

mod_http_oauth2: Add support for the "openid" scope This "openid" scope is there to signal access to the userinfo endpoint, which is needed for OIDC support. We don't actually check this later because the userinfo endpoint only returns info embedded in the token itself, but in the future we may want to check this more carefully.
author Kim Alvefur <zash@zash.se>
date Thu, 16 Mar 2023 17:06:35 +0100
parents bbfcd786cc78
children
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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 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);