1 defmodule Pleroma.Object.Containment do
5 This module contains some useful functions for containing objects to specific
6 origins and determining those origins. They previously lived in the
7 ActivityPub `Transmogrifier` module.
9 Object containment is an important step in validating remote objects to prevent
10 spoofing, therefore removal of object containment functions is NOT recommended.
15 def get_actor(%{"actor" => actor}) when is_binary(actor) do
19 def get_actor(%{"actor" => actor}) when is_list(actor) do
20 if is_binary(Enum.at(actor, 0)) do
23 Enum.find(actor, fn %{"type" => type} -> type in ["Person", "Service", "Application"] end)
28 def get_actor(%{"actor" => %{"id" => id}}) when is_bitstring(id) do
32 def get_actor(%{"actor" => nil, "attributedTo" => actor}) when not is_nil(actor) do
33 get_actor(%{"actor" => actor})
37 Checks that an imported AP object's actor matches the domain it came from.
39 def contain_origin(_id, %{"actor" => nil}), do: :error
41 def contain_origin(id, %{"actor" => _actor} = params) do
42 id_uri = URI.parse(id)
43 actor_uri = URI.parse(get_actor(params))
45 if id_uri.host == actor_uri.host do
52 def contain_origin_from_id(_id, %{"id" => nil}), do: :error
54 def contain_origin_from_id(id, %{"id" => other_id} = _params) do
55 id_uri = URI.parse(id)
56 other_uri = URI.parse(other_id)
58 if id_uri.host == other_uri.host do