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annotate mod_restrict_xmpp/mod_restrict_xmpp.lua @ 5342:e28ba69b5307

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mod_rest: Implement use of refresh tokens in rest.sh example Because having access tokens expire daily was becoming annoying. Now this is starting to be in dire need of refactoring.
author Kim Alvefur <zash@zash.se>
date Wed, 12 Apr 2023 11:24:50 +0200
parents a1f49586d28a
children 825c6fb76c48
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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
459a4001c1d9 mod_restrict_xmpp: XMPP-layer access control using Prosody's permissions API
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121 end
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122 end);