annotate mod_muc_occupant_id/mod_muc_occupant_id.lua @ 4211:0f26ae2f2a74

mod_invites_page: Change client selection button text from 'Install' to 'Select' by default This also allows specific clients entries to override the text via the 'select_text' field. Rationale: 1) users may already have the software installed, we still want them to select it anyway for the tailored setup experience. 2) some clients (e.g. web clients) are not really "installed" so the text was misleading
author Matthew Wild <mwild1@gmail.com>
date Fri, 16 Oct 2020 11:06:25 +0100
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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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);