80 lines
2.4 KiB
Elixir
80 lines
2.4 KiB
Elixir
# Pleroma: A lightweight social networking server
|
|
# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
|
|
# SPDX-License-Identifier: AGPL-3.0-only
|
|
|
|
defmodule Pleroma.Object.Containment do
|
|
@moduledoc """
|
|
This module contains some useful functions for containing objects to specific
|
|
origins and determining those origins. They previously lived in the
|
|
ActivityPub `Transmogrifier` module.
|
|
|
|
Object containment is an important step in validating remote objects to prevent
|
|
spoofing, therefore removal of object containment functions is NOT recommended.
|
|
"""
|
|
def get_actor(%{"actor" => actor}) when is_binary(actor) do
|
|
actor
|
|
end
|
|
|
|
def get_actor(%{"actor" => actor}) when is_list(actor) do
|
|
if is_binary(Enum.at(actor, 0)) do
|
|
Enum.at(actor, 0)
|
|
else
|
|
Enum.find(actor, fn %{"type" => type} -> type in ["Person", "Service", "Application"] end)
|
|
|> Map.get("id")
|
|
end
|
|
end
|
|
|
|
def get_actor(%{"actor" => %{"id" => id}}) when is_bitstring(id) do
|
|
id
|
|
end
|
|
|
|
def get_actor(%{"actor" => nil, "attributedTo" => actor}) when not is_nil(actor) do
|
|
get_actor(%{"actor" => actor})
|
|
end
|
|
|
|
# TODO: We explicitly allow 'tag' URIs through, due to references to legacy OStatus
|
|
# objects being present in the test suite environment. Once these objects are
|
|
# removed, please also remove this.
|
|
if Mix.env() == :test do
|
|
defp compare_uris(_, %URI{scheme: "tag"}), do: :ok
|
|
end
|
|
|
|
defp compare_uris(%URI{} = id_uri, %URI{} = other_uri) do
|
|
if id_uri.host == other_uri.host do
|
|
:ok
|
|
else
|
|
:error
|
|
end
|
|
end
|
|
|
|
defp compare_uris(_, _), do: :error
|
|
|
|
@doc """
|
|
Checks that an imported AP object's actor matches the domain it came from.
|
|
"""
|
|
def contain_origin(_id, %{"actor" => nil}), do: :error
|
|
|
|
def contain_origin(id, %{"actor" => _actor} = params) do
|
|
id_uri = URI.parse(id)
|
|
actor_uri = URI.parse(get_actor(params))
|
|
|
|
compare_uris(actor_uri, id_uri)
|
|
end
|
|
|
|
def contain_origin(id, %{"attributedTo" => actor} = params),
|
|
do: contain_origin(id, Map.put(params, "actor", actor))
|
|
|
|
def contain_origin_from_id(_id, %{"id" => nil}), do: :error
|
|
|
|
def contain_origin_from_id(id, %{"id" => other_id} = _params) do
|
|
id_uri = URI.parse(id)
|
|
other_uri = URI.parse(other_id)
|
|
|
|
compare_uris(id_uri, other_uri)
|
|
end
|
|
|
|
def contain_child(%{"object" => %{"id" => id, "attributedTo" => _} = object}),
|
|
do: contain_origin(id, object)
|
|
|
|
def contain_child(_), do: :ok
|
|
end
|