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mod_turncredentials/mod_turncredentials.lua @ 5139:449e4ca4de32

mod_unified_push: Remove dependency on trunk util.jwt (0.12 compat) This should allow the module to work on 0.12, while preserving expiry checking (which was not built in to 0.12's util.jwt).
author Matthew Wild <mwild1@gmail.com>
date Tue, 10 Jan 2023 16:34:21 +0000
parent 3977:bbfcd786cc78
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1 -- XEP-0215 implementation for time-limited turn credentials
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2 -- Copyright (C) 2012-2013 Philipp Hancke
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3 -- This file is MIT/X11 licensed.
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5 local st = require "util.stanza";
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6 local hmac_sha1 = require "util.hashes".hmac_sha1;
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7 local base64 = require "util.encodings".base64;
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8 local os_time = os.time;
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9 local datetime = require "util.datetime".datetime;
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10 local secret = module:get_option_string("turncredentials_secret");
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11 local host = module:get_option_string("turncredentials_host"); -- use ip addresses here to avoid further dns lookup latency
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12 local port = module:get_option_number("turncredentials_port", 3478);
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13 local ttl = module:get_option_number("turncredentials_ttl", 86400);
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14 if not (secret and host) then
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15 module:log("error", "turncredentials not configured");
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16 return;
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17 end
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19 module:add_feature("urn:xmpp:extdisco:1");
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21 module:hook("iq-get/host/urn:xmpp:extdisco:1:services", function(event)
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22 local origin, stanza = event.origin, event.stanza;
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23 if origin.type ~= "c2s" then
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24 return;
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25 end
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26 local expires_at = os_time() + ttl;
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27 local userpart = tostring(expires_at);
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28 local nonce = base64.encode(hmac_sha1(secret, tostring(userpart), false));
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29 origin.send(st.reply(stanza):tag("services", {xmlns = "urn:xmpp:extdisco:1"})
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30 :tag("service", { type = "stun", host = host, port = ("%d"):format(port) }):up()
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31 :tag("service", { type = "turn", host = host, port = ("%d"):format(port), username = userpart, password = nonce, ttl = ("%d"):format(ttl) }):up()
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32 );
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33 return true;
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34 end);
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36 module:add_feature("urn:xmpp:extdisco:2");
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38 module:hook("iq-get/host/urn:xmpp:extdisco:2:services", function(event)
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39 local origin, stanza = event.origin, event.stanza;
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40 if origin.type ~= "c2s" then
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41 return;
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42 end
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43 local expires_at = os_time() + ttl;
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44 local userpart = tostring(expires_at);
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45 local nonce = base64.encode(hmac_sha1(secret, tostring(userpart), false));
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46 origin.send(st.reply(stanza):tag("services", {xmlns = "urn:xmpp:extdisco:2"})
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47 :tag("service", { type = "stun", transport = "udp", host = host, port = ("%d"):format(port) }):up()
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48 :tag("service", { type = "stun", transport = "tcp", host = host, port = ("%d"):format(port) }):up()
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49 :tag("service", { type = "turn", transport = "udp", host = host, port = ("%d"):format(port), username = userpart, password = nonce, expires = datetime(expires_at), restricted = "1" }):up()
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50 :tag("service", { type = "turn", transport = "tcp", host = host, port = ("%d"):format(port), username = userpart, password = nonce, expires = datetime(expires_at), restricted = "1" }):up()
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51 );
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52 return true;
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53 end);