Mercurial > prosody-modules
view mod_muc_occupant_id/mod_muc_occupant_id.lua @ 5298:12f7d8b901e0
mod_audit: Support for adding location (GeoIP) to audit events
This can be more privacy-friendly than logging full IP addresses, and also
more informative to a user - IP addresses don't mean much to the average
person, however if they see activity from outside their expected country, they
can immediately identify suspicious activity.
As with IPs, this field is configurable for deployments that would like to
disable it. Location is also not logged when the geoip library is not
available.
author | Matthew Wild <mwild1@gmail.com> |
---|---|
date | Sat, 01 Apr 2023 13:11:53 +0100 (21 months ago) |
parents | ae27f3359df8 |
children |
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-- Implementation of https://xmpp.org/extensions/inbox/occupant-id.html -- XEP-0421: Anonymous unique occupant identifiers for MUCs module:depends("muc"); local uuid = require "util.uuid"; local hmac_sha256 = require "util.hashes".hmac_sha256; local b64encode = require "util.encodings".base64.encode; local xmlns_occupant_id = "urn:xmpp:occupant-id:0"; local function generate_id(occupant, room) local bare = occupant.bare_jid; if room._data.occupant_id_salt == nil then room._data.occupant_id_salt = uuid.generate(); end -- XXX: Temporary not-so-important migration measure. Remove this next time -- somebody looks at it. This module used to store every participant's -- occupant-id all the time forever. room._data.occupant_ids = nil; return b64encode(hmac_sha256(bare, room._data.occupant_id_salt)); end local function update_occupant(event) local stanza, room, occupant, dest_occupant = event.stanza, event.room, event.occupant, event.dest_occupant; -- "muc-occupant-pre-change" provides "dest_occupant" but not "occupant". if dest_occupant ~= nil then occupant = dest_occupant; end -- strip any existing <occupant-id/> tags to avoid forgery stanza:remove_children("occupant-id", xmlns_occupant_id); local unique_id = generate_id(occupant, room); stanza:tag("occupant-id", { xmlns = xmlns_occupant_id, id = unique_id }):up(); end local function muc_private(event) local stanza, room = event.stanza, event.room; local occupant = room._occupants[stanza.attr.from]; update_occupant({ stanza = stanza, room = room, occupant = occupant, }); end module:add_feature(xmlns_occupant_id); module:hook("muc-disco#info", function (event) event.reply:tag("feature", { var = xmlns_occupant_id }):up(); end); module:hook("muc-broadcast-presence", update_occupant); module:hook("muc-occupant-pre-join", update_occupant); module:hook("muc-occupant-pre-change", update_occupant); module:hook("muc-occupant-groupchat", update_occupant); module:hook("muc-private-message", muc_private);