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annotate mod_turncredentials/mod_turncredentials.lua @ 3740:b3fb32bd1f01

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mod_bookmarks2: Use the correct error when failing to retrieve bookmarks2 to reply to Private XML request.
author Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
date Wed, 13 Nov 2019 16:27:50 +0100
parents 2bbf655431be
children 915c7bd5f754
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95ab35ef52ba mod_turncredentials: XEP-0215 implementation for time-limited turn credentials
Philipp Hancke <fippo@goodadvice.pages.de>
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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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2da546139cb5 mod_turncredentials: Import HMAC from util.hashes
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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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0ae2c250f274 mod_turncredentials: Use type-specific get_option() methods where appropriate, and pass in default values
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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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afae347928d8 mod_turncredentials: Advertise the XEP-0215 feature (thanks Gryffus)
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19 module:add_feature("urn:xmpp:extdisco:1");
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6695c3098025 mod_turncredentials: Use iq-get event, to save checking attr.type manually
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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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a18effacd384 mod_turncredentials: No need to check tag name, we're already in the event handler for the 'services' tag
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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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0b6b33688b75 mod_turncredentials: use smarter timestamp expiry from draft-uberti-behave-turn-rest-00
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26 local now = os_time() + ttl;
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27 local userpart = tostring(now);
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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 now = os_time() + ttl;
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44 local userpart = tostring(now);
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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", host = host, port = ("%d"):format(port) }):up()
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48 :tag("service", { type = "turn", host = host, port = ("%d"):format(port), username = userpart, password = nonce, expires = datetime(ttl), restricted = "1" }):up()
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49 );
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50 return true;
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51 end);