prosody-modules
469408682152
mod_muc_occupant_id/mod_muc_occupant_id.lua

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mod_muc_occupant_id/mod_muc_occupant_id.lua @ 3934:469408682152

mod_http_oauth2: Set content type on successful repsponses (fixes #1501) This will set the content-type on all responses, tho errors are already taken care of in the error handler.
author Kim Alvefur <zash@zash.se>
date Sun, 08 Mar 2020 13:42:55 +0100
parent 3916:f1e28dcb3791
child 3945:cf682a02b6d8
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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 if room._data.occupant_ids == nil then
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21 room._data.occupant_ids = {};
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22 end
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23
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24 if room._data.occupant_ids[bare] == nil then
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25 local unique_id = b64encode(hmac_sha256(bare, room._data.occupant_id_salt));
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26 room._data.occupant_ids[bare] = unique_id;
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27 end
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28
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29 return room._data.occupant_ids[bare];
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30 end
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32 local function update_occupant(event)
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33 local stanza, room, occupant, dest_occupant = event.stanza, event.room, event.occupant, event.dest_occupant;
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35 -- "muc-occupant-pre-change" provides "dest_occupant" but not "occupant".
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36 if dest_occupant ~= nil then
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37 occupant = dest_occupant;
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38 end
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40 -- strip any existing <occupant-id/> tags to avoid forgery
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41 stanza:remove_children("occupant-id", xmlns_occupant_id);
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43 local unique_id = generate_id(occupant, room);
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44 stanza:tag("occupant-id", { xmlns = xmlns_occupant_id, id = unique_id }):up();
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45 end
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47 module:add_feature(xmlns_occupant_id);
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48 module:hook("muc-disco#info", function (event)
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49 event.reply:tag("feature", { var = xmlns_occupant_id }):up();
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50 end);
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51
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52 -- TODO: Handle MUC-PMs
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53 module:hook("muc-broadcast-presence", update_occupant);
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54 module:hook("muc-occupant-pre-join", update_occupant);
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55 module:hook("muc-occupant-pre-change", update_occupant);
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56 module:hook("muc-occupant-groupchat", update_occupant);