prosody-modules
db4c66a1d24b
mod_muc_occupant_id/mod_muc_occupant_id.lua

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mod_muc_occupant_id/mod_muc_occupant_id.lua @ 5366:db4c66a1d24b

mod_http_oauth2: Fill in some client metadata defaults Explicit > Implicit Maybe we should actually use these for something as well? :) It's is somewhat an open question of how strictly we should enforce things in the client metadata given that it is somewhat extensible. Especially some of these enum fields which have corresponding IANA registries.
author Kim Alvefur <zash@zash.se>
date Tue, 25 Apr 2023 18:09:08 +0200
parent 4010:ae27f3359df8
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1
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d6164ae6179c mod_muc_occupant_id: Update links to the XEP inbox.
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2 -- Implementation of https://xmpp.org/extensions/inbox/occupant-id.html
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3 -- XEP-0421: Anonymous unique occupant identifiers for MUCs
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5 module:depends("muc");
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7 local uuid = require "util.uuid";
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8 local hmac_sha256 = require "util.hashes".hmac_sha256;
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9 local b64encode = require "util.encodings".base64.encode;
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11 local xmlns_occupant_id = "urn:xmpp:occupant-id:0";
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13 local function generate_id(occupant, room)
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14 local bare = occupant.bare_jid;
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16 if room._data.occupant_id_salt == nil then
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17 room._data.occupant_id_salt = uuid.generate();
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18 end
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20 -- XXX: Temporary not-so-important migration measure. Remove this next time
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21 -- somebody looks at it. This module used to store every participant's
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22 -- occupant-id all the time forever.
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23 room._data.occupant_ids = nil;
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25 return b64encode(hmac_sha256(bare, room._data.occupant_id_salt));
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26 end
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28 local function update_occupant(event)
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29 local stanza, room, occupant, dest_occupant = event.stanza, event.room, event.occupant, event.dest_occupant;
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31 -- "muc-occupant-pre-change" provides "dest_occupant" but not "occupant".
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32 if dest_occupant ~= nil then
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33 occupant = dest_occupant;
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34 end
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36 -- strip any existing <occupant-id/> tags to avoid forgery
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37 stanza:remove_children("occupant-id", xmlns_occupant_id);
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39 local unique_id = generate_id(occupant, room);
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40 stanza:tag("occupant-id", { xmlns = xmlns_occupant_id, id = unique_id }):up();
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41 end
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43 local function muc_private(event)
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44 local stanza, room = event.stanza, event.room;
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45 local occupant = room._occupants[stanza.attr.from];
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47 update_occupant({
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48 stanza = stanza,
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49 room = room,
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50 occupant = occupant,
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51 });
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52 end
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53
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54 module:add_feature(xmlns_occupant_id);
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55 module:hook("muc-disco#info", function (event)
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56 event.reply:tag("feature", { var = xmlns_occupant_id }):up();
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57 end);
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58
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59 module:hook("muc-broadcast-presence", update_occupant);
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60 module:hook("muc-occupant-pre-join", update_occupant);
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61 module:hook("muc-occupant-pre-change", update_occupant);
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62 module:hook("muc-occupant-groupchat", update_occupant);
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63 module:hook("muc-private-message", muc_private);