Mercurial > prosody-modules

annotate mod_muc_moderation/mod_muc_moderation.lua @ 5549:01a0b67a9afd

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mod_http_oauth2: Add TODO about disabling password grant Per recommendation in draft-ietf-oauth-security-topics-23 it should at the very least be disabled by default. However since this is used by the Snikket web portal some care needs to be taken not to break this, unless it's already broken by other changes to this module.
author Kim Alvefur <zash@zash.se>
date Fri, 16 Jun 2023 00:06:53 +0200
parents 4d6af8950016
children 06fad22672e1
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1 -- mod_muc_moderation
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2 --
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3 -- Copyright (C) 2015-2021 Kim Alvefur
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4 --
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5 -- This file is MIT licensed.
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6 --
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7 -- Implements: XEP-0425: Message Moderation
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8 --
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9 -- Imports
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10 local dt = require "util.datetime";
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11 local id = require "util.id";
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12 local jid = require "util.jid";
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13 local st = require "util.stanza";
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14
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15 -- Plugin dependencies
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16 local mod_muc = module:depends "muc";
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17
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18 local muc_util = module:require "muc/util";
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19 local valid_roles = muc_util.valid_roles;
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20
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21 local muc_log_archive = module:open_store("muc_log", "archive");
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22
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23 if not muc_log_archive.set then
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24 module:log("warn", "Selected archive storage module does not support message replacement, no tombstones will be saved");
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25 end
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26
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27 -- Namespaces
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28 local xmlns_fasten = "urn:xmpp:fasten:0";
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29 local xmlns_moderate = "urn:xmpp:message-moderate:0";
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30 local xmlns_retract = "urn:xmpp:message-retract:0";
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31
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32 -- Discovering support
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33 module:hook("muc-disco#info", function (event)
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34 event.reply:tag("feature", { var = xmlns_moderate }):up();
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35 end);
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36
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37 -- TODO error registry, requires Prosody 0.12+
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38
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39 -- moderate : function (string, string, string, boolean, string) : boolean, enum, enum, string
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40 local function moderate(actor, room_jid, stanza_id, retract, reason)
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41 local room_node = jid.split(room_jid);
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42 local room = mod_muc.get_room_from_jid(room_jid);
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43
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44 -- Permissions is based on role, which is a property of a current occupant,
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45 -- so check if the actor is an occupant, otherwise if they have a reserved
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46 -- nickname that can be used to retrieve the role.
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47 local actor_nick = room:get_occupant_jid(actor);
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48 if not actor_nick then
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49 local reserved_nickname = room:get_affiliation_data(jid.bare(actor), "reserved_nickname");
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50 if reserved_nickname then
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51 actor_nick = room.jid .. "/" .. reserved_nickname;
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52 end
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53 end
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54
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55 -- Retrieve their current role, iff they are in the room, otherwise what they
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56 -- would have based on affiliation.
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57 local affiliation = room:get_affiliation(actor);
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58 local role = room:get_role(actor_nick) or room:get_default_role(affiliation);
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59 if valid_roles[role or "none"] < valid_roles.moderator then
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60 return false, "auth", "forbidden", "You need a role of at least 'moderator'";
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61 end
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62
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63 -- Original stanza to base tombstone on
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64 local original, err;
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65 if muc_log_archive.get then
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66 original, err = muc_log_archive:get(room_node, stanza_id);
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67 else
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68 -- COMPAT missing :get API
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69 err = "item-not-found";
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70 for i, item in muc_log_archive:find(room_node, { key = stanza_id, limit = 1 }) do
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71 if i == stanza_id then
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72 original, err = item, nil;
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73 end
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74 end
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75 end
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76
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77 if not original then
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78 if err == "item-not-found" then
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79 return false, "modify", "item-not-found";
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80 else
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81 return false, "wait", "internal-server-error";
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82 end
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83 end
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84
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85
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86 local announcement = st.message({ from = room_jid, type = "groupchat", id = id.medium(), })
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87 :tag("apply-to", { xmlns = xmlns_fasten, id = stanza_id })
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88 :tag("moderated", { xmlns = xmlns_moderate, by = actor_nick })
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89
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90 if retract then
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91 announcement:tag("retract", { xmlns = xmlns_retract }):up();
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92 end
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93
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94 if reason then
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95 announcement:text_tag("reason", reason);
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96 end
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97
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98 if muc_log_archive.set and retract then
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99 local tombstone = st.message({ from = original.attr.from, type = "groupchat", id = original.attr.id })
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100 :tag("moderated", { xmlns = xmlns_moderate, by = actor_nick })
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101 :tag("retracted", { xmlns = xmlns_retract, stamp = dt.datetime() }):up();
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102
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103 if reason then
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104 tombstone:text_tag("reason", reason);
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105 end
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106 tombstone:reset();
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107
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108 local was_replaced = muc_log_archive:set(room_node, stanza_id, tombstone);
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109 if not was_replaced then
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110 return false, "wait", "internal-server-error";
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111 end
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112 end
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113
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114 -- Done, tell people about it
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115 module:log("info", "Message with id '%s' in room %s moderated by %s, reason: %s", stanza_id, room_jid, actor, reason);
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116 room:broadcast_message(announcement);
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117
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118 return true;
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119 end
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120
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121 -- Main handling
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122 module:hook("iq-set/bare/" .. xmlns_fasten .. ":apply-to", function (event)
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123 local stanza, origin = event.stanza, event.origin;
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124
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125 local actor = stanza.attr.from;
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126 local room_jid = stanza.attr.to;
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127
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128 -- Collect info we need
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129 local apply_to = stanza.tags[1];
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130 local moderate_tag = apply_to:get_child("moderate", xmlns_moderate);
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131 if not moderate_tag then return end -- some other kind of fastening?
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132
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133 local reason = moderate_tag:get_child_text("reason");
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134 local retract = moderate_tag:get_child("retract", xmlns_retract);
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135
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136 local stanza_id = apply_to.attr.id;
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137
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138 local ok, error_type, error_condition, error_text = moderate(actor, room_jid, stanza_id, retract, reason);
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139 if not ok then
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140 origin.send(st.error_reply(stanza, error_type, error_condition, error_text));
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141 return true;
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142 end
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143
3897
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144 origin.send(st.reply(stanza));
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145 return true;
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146 end);
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147
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148 module:hook("muc-message-is-historic", function (event)
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149 -- Ensure moderation messages are stored
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150 if event.stanza.attr.from == event.room.jid then
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151 return event.stanza:get_child("apply-to", xmlns_fasten);
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152 end
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153 end, 1);