prosody
fceebfb28d86
plugins/muc/occupant_id.lib.lua

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plugins/muc/occupant_id.lib.lua @ 11864:fceebfb28d86

mod_http_file_share: Clean up incomplete uploads If the request fails in the middle then the file~ could be left behind because no code was invoked to delete it then. This gets rid of it when the request is removed. It may still be left in case of an unclean shutdown.
author Kim Alvefur <zash@zash.se>
date Sat, 23 Oct 2021 01:53:07 +0200
parent 11215:9ce0a899ff07
child 12108:e9882c4c397f
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rev   line source
11215
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1 -- Implementation of https://xmpp.org/extensions/inbox/occupant-id.html
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2 -- XEP-0421: Anonymous unique occupant identifiers for MUCs
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3
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4 -- (C) 2020 Maxime “pep” Buquet <pep@bouah.net>
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5 -- (C) 2020 Matthew Wild <mwild1@gmail.com>
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6
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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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10
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11 local xmlns_occupant_id = "urn:xmpp:occupant-id:0";
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12
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13 local function get_occupant_id(room, occupant)
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14 if occupant.stable_id then
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15 return occupant.stable_id;
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16 end
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17
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18 local salt = room._data.occupant_id_salt;
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19 if not salt then
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20 salt = uuid.generate();
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21 room._data.occupant_id_salt = salt;
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22 end
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23
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24 occupant.stable_id = b64encode(hmac_sha256(occupant.bare_jid, salt));
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25
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26 return occupant.stable_id;
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27 end
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28
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29 local function update_occupant(event)
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30 local stanza, room, occupant, dest_occupant = event.stanza, event.room, event.occupant, event.dest_occupant;
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31
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32 -- "muc-occupant-pre-change" provides "dest_occupant" but not "occupant".
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33 if dest_occupant ~= nil then
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34 occupant = dest_occupant;
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35 end
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36
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37 -- strip any existing <occupant-id/> tags to avoid forgery
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38 stanza:remove_children("occupant-id", xmlns_occupant_id);
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39
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40 local unique_id = get_occupant_id(room, occupant);
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41 stanza:tag("occupant-id", { xmlns = xmlns_occupant_id, id = unique_id }):up();
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42 end
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43
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44 local function muc_private(event)
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45 local stanza, room = event.stanza, event.room;
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46 local occupant = room._occupants[stanza.attr.from];
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47
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48 update_occupant({
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49 stanza = stanza,
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50 room = room,
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51 occupant = occupant,
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52 });
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53 end
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54
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55 if module:get_option_boolean("muc_occupant_id", true) then
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56 module:add_feature(xmlns_occupant_id);
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57 module:hook("muc-disco#info", function (event)
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58 event.reply:tag("feature", { var = xmlns_occupant_id }):up();
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59 end);
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60
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61 module:hook("muc-broadcast-presence", update_occupant);
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62 module:hook("muc-occupant-pre-join", update_occupant);
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63 module:hook("muc-occupant-pre-change", update_occupant);
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64 module:hook("muc-occupant-groupchat", update_occupant);
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65 module:hook("muc-private-message", muc_private);
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66 end
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67
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68 return {
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69 get_occupant_id = get_occupant_id;
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70 };