prosody-modules
0f5657db1cfc
mod_restrict_xmpp/mod_restrict_xmpp.lua

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mod_restrict_xmpp/mod_restrict_xmpp.lua @ 5296:0f5657db1cfc

mod_isolate_host: handle server-generated stanzas The hook for setting the no_host_isolation is only called for c2s sessions. This does not work for stanzas generated by the server, such as PEP notifications or presence probe answers. To handle that, we do per-stanza checks for the case that the origin is local.
author Jonas Schäfer <jonas@wielicki.name>
date Sat, 01 Apr 2023 12:03:08 +0200
parent 5010:a1f49586d28a
child 5582:825c6fb76c48
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rev   line source
5009
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1 local array = require "util.array";
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2 local it = require "util.iterators";
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3 local set = require "util.set";
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4 local st = require "util.stanza";
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5
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6 module:default_permission("prosody:user", "xmpp:federate");
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7 module:hook("route/remote", function (event)
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8 if not module:may("xmpp:federate", event) then
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9 if event.stanza.attr.type ~= "result" and event.stanza.attr.type ~= "error" then
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10 module:log("warn", "Access denied: xmpp:federate for %s -> %s", event.stanza.attr.from, event.stanza.attr.to);
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11 local reply = st.error_reply(event.stanza, "auth", "forbidden");
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12 event.origin.send(reply);
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13 end
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14 return true;
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15 end
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16 end);
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17
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18 local iq_namespaces = {
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19 ["jabber:iq:roster"] = "contacts";
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20 ["jabber:iq:private"] = "storage";
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21
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22 ["vcard-temp"] = "profile";
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23 ["urn:xmpp:mam:0"] = "history";
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24 ["urn:xmpp:mam:1"] = "history";
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25 ["urn:xmpp:mam:2"] = "history";
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26
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27 ["urn:xmpp:carbons:0"] = "carbons";
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28 ["urn:xmpp:carbons:1"] = "carbons";
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29 ["urn:xmpp:carbons:2"] = "carbons";
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30
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31 ["urn:xmpp:blocking"] = "blocklist";
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32
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33 ["http://jabber.org/protocol/pubsub"] = "pep";
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34 ["http://jabber.org/protocol/disco#info"] = "disco";
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35 };
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36
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37 local legacy_storage_nodes = {
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38 ["storage:bookmarks"] = "bookmarks";
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39 ["storage:rosternotes"] = "contacts";
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40 ["roster:delimiter"] = "contacts";
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41 ["storage:metacontacts"] = "contacts";
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42 };
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43
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44 local pep_nodes = {
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45 ["storage:bookmarks"] = "bookmarks";
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46 ["urn:xmpp:bookmarks:1"] = "bookmarks";
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47
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48 ["urn:xmpp:avatar:data"] = "profile";
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49 ["urn:xmpp:avatar:metadata"] = "profile";
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50 ["http://jabber.org/protocol/nick"] = "profile";
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51
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52 ["eu.siacs.conversations.axolotl.devicelist"] = "omemo";
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53 ["urn:xmpp:omemo:1:devices"] = "omemo";
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54 ["urn:xmpp:omemo:1:bundles"] = "omemo";
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55 ["urn:xmpp:omemo:2:devices"] = "omemo";
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56 ["urn:xmpp:omemo:2:bundles"] = "omemo";
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57 };
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58
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59 module:hook("pre-iq/bare", function (event)
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60 if not event.to_self then return; end
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61 local origin, stanza = event.origin, event.stanza;
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62
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63 local typ = stanza.attr.type;
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64 if typ ~= "set" and typ ~= "get" then return; end
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65 local action = typ == "get" and "read" or "write";
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66
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67 local payload = stanza.tags[1];
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68 local ns = payload and payload.attr.xmlns;
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69 local proto = iq_namespaces[ns];
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70 if proto == "pep" then
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71 local pubsub = payload:get_child("pubsub", "http://jabber.org/protocol/pubsub");
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72 local node = pubsub and #pubsub.tags == 1 and pubsub.tags[1].attr.node or nil;
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73 proto = pep_nodes[node] or "pep";
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74 if proto == "pep" and node and node:match("^eu%.siacs%.conversations%.axolotl%.bundles%.%d+$") then
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75 proto = "omemo"; -- COMPAT w/ original OMEMO
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76 end
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77 elseif proto == "storage" then
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78 local data = payload.tags[1];
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79 proto = data and legacy_storage_nodes[data.attr.xmlns] or "legacy-storage";
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80 elseif proto == "carbons" then
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81 -- This allows access to live messages
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82 proto, action = "messages", "read";
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83 elseif proto == "history" then
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84 action = "read";
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85 end
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86 local permission_name = "xmpp:account:"..(proto and (proto..":") or "")..action;
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87 if not module:may(permission_name, event) then
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88 module:log("warn", "Access denied: %s ({%s}%s) for %s", permission_name, ns, payload.name, origin.full_jid or origin.id);
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89 origin.send(st.error_reply(stanza, "auth", "forbidden", "You do not have permission to make this request ("..permission_name..")"));
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90 return true;
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91 end
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92 end);
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93
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94 --module:default_permission("prosody:restricted", "xmpp:account:read");
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95 --module:default_permission("prosody:restricted", "xmpp:account:write");
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96 module:default_permission("prosody:restricted", "xmpp:account:messages:read");
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97 module:default_permission("prosody:restricted", "xmpp:account:messages:write");
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98 for _, property_list in ipairs({ iq_namespaces, legacy_storage_nodes, pep_nodes }) do
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99 for account_property in set.new(array.collect(it.values(property_list))) do
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100 module:default_permission("prosody:restricted", "xmpp:account:"..account_property..":read");
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101 module:default_permission("prosody:restricted", "xmpp:account:"..account_property..":write");
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102 end
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103 end
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104
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105 module:default_permission("prosody:restricted", "xmpp:account:presence:write");
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106 module:hook("pre-presence/bare", function (event)
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107 if not event.to_self then return; end
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108 local stanza = event.stanza;
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109 if not module:may("xmpp:account:presence:write", event) then
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110 module:log("warn", "Access denied: xmpp:account:presence:write for %s", event.origin.full_jid or event.origin.id);
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111 event.origin.send(st.error_reply(stanza, "auth", "forbidden", "You do not have permission to send account presence"));
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112 return true;
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113 end
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114 local priority = stanza:get_child_text("priority");
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115 if priority ~= "-1" then
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116 if not module:may("xmpp:account:messages:read", event) then
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117 module:log("warn", "Access denied: xmpp:account:messages:read for %s", event.origin.full_jid or event.origin.id);
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118 event.origin.send(st.error_reply(stanza, "auth", "forbidden", "You do not have permission to receive messages (use presence priority -1)"));
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119 return true;
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120 end
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121 end
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122 end);