Mercurial > prosody-modules

annotate mod_muc_occupant_id/mod_muc_occupant_id.lua @ 5416:2393dbae51ed

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mod_http_oauth2: Add option for specifying TTL of registered clients Meant to simplify configuration, since TTL vs ignoring expiration is expected to be the main thing one would want to configure. Unsure what the implications of having unlimited lifetime of clients are, given no way to revoke them currently, short of rotating the signing secret. On one hand, it would be annoying to have the client expire. On the other hand, it is trivial to re-register it.
author Kim Alvefur <zash@zash.se>
date Thu, 04 May 2023 18:41:33 +0200
parents ae27f3359df8
children
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1
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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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46
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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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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);