author | Kim Alvefur <zash@zash.se> |
Sun, 18 Jun 2023 22:23:24 +0200 | |
changeset 5561 | d7667d9ad96a |
parent 5014 | a1f49586d28a |
child 5586 | 825c6fb76c48 |
permissions | -rw-r--r-- |
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mod_restrict_xmpp: XMPP-layer access control using Prosody's permissions API
Matthew Wild <mwild1@gmail.com>
parents:
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1 |
local array = require "util.array"; |
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local it = require "util.iterators"; |
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local set = require "util.set"; |
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local st = require "util.stanza"; |
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5 |
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module:default_permission("prosody:user", "xmpp:federate"); |
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module:hook("route/remote", function (event) |
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if not module:may("xmpp:federate", event) then |
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if event.stanza.attr.type ~= "result" and event.stanza.attr.type ~= "error" then |
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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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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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end); |
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local iq_namespaces = { |
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["jabber:iq:roster"] = "contacts"; |
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["jabber:iq:private"] = "storage"; |
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["vcard-temp"] = "profile"; |
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["urn:xmpp:mam:0"] = "history"; |
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["urn:xmpp:mam:1"] = "history"; |
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["urn:xmpp:mam:2"] = "history"; |
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["urn:xmpp:carbons:0"] = "carbons"; |
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["urn:xmpp:carbons:1"] = "carbons"; |
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["urn:xmpp:carbons:2"] = "carbons"; |
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["urn:xmpp:blocking"] = "blocklist"; |
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["http://jabber.org/protocol/pubsub"] = "pep"; |
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["http://jabber.org/protocol/disco#info"] = "disco"; |
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35 |
}; |
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local legacy_storage_nodes = { |
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["storage:bookmarks"] = "bookmarks"; |
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["storage:rosternotes"] = "contacts"; |
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["roster:delimiter"] = "contacts"; |
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["storage:metacontacts"] = "contacts"; |
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}; |
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local pep_nodes = { |
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["storage:bookmarks"] = "bookmarks"; |
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["urn:xmpp:bookmarks:1"] = "bookmarks"; |
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["urn:xmpp:avatar:data"] = "profile"; |
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["urn:xmpp:avatar:metadata"] = "profile"; |
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["http://jabber.org/protocol/nick"] = "profile"; |
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["eu.siacs.conversations.axolotl.devicelist"] = "omemo"; |
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["urn:xmpp:omemo:1:devices"] = "omemo"; |
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["urn:xmpp:omemo:1:bundles"] = "omemo"; |
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["urn:xmpp:omemo:2:devices"] = "omemo"; |
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["urn:xmpp:omemo:2:bundles"] = "omemo"; |
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}; |
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module:hook("pre-iq/bare", function (event) |
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if not event.to_self then return; end |
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local origin, stanza = event.origin, event.stanza; |
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local typ = stanza.attr.type; |
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if typ ~= "set" and typ ~= "get" then return; end |
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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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local ns = payload and payload.attr.xmlns; |
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local proto = iq_namespaces[ns]; |
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if proto == "pep" then |
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local pubsub = payload:get_child("pubsub", "http://jabber.org/protocol/pubsub"); |
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local node = pubsub and #pubsub.tags == 1 and pubsub.tags[1].attr.node or nil; |
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proto = pep_nodes[node] or "pep"; |
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if proto == "pep" and node and node:match("^eu%.siacs%.conversations%.axolotl%.bundles%.%d+$") then |
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proto = "omemo"; -- COMPAT w/ original OMEMO |
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76 |
end |
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elseif proto == "storage" then |
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local data = payload.tags[1]; |
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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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elseif proto == "history" then |
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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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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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--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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module:default_permission("prosody:restricted", "xmpp:account:"..account_property..":write"); |
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end |
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end |
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104 |
|
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module:default_permission("prosody:restricted", "xmpp:account:presence:write"); |
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module:hook("pre-presence/bare", function (event) |
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if not event.to_self then return; end |
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local stanza = event.stanza; |
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if not module:may("xmpp:account:presence:write", event) then |
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module:log("warn", "Access denied: xmpp:account:presence:write for %s", event.origin.full_jid or event.origin.id); |
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event.origin.send(st.error_reply(stanza, "auth", "forbidden", "You do not have permission to send account presence")); |
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return true; |
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end |
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local priority = stanza:get_child_text("priority"); |
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if priority ~= "-1" then |
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if not module:may("xmpp:account:messages:read", event) then |
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module:log("warn", "Access denied: xmpp:account:messages:read for %s", event.origin.full_jid or event.origin.id); |
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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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return true; |
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120 |
end |
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121 |
end |
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end); |