mirror of
https://akkoma.dev/AkkomaGang/akkoma.git
synced 2024-12-11 05:30:11 +00:00
739bbe0d3b
It is more efficient to check for object containment violations at the IR level instead of in the protocol handlers. OStatus containment is especially a tricky situation, as the containment rules don't match those of IR and ActivityPub. Accordingly, we just always do a final containment check at the IR level before the object is added to the IR object graph.
72 lines
2 KiB
Elixir
72 lines
2 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
|
|
|
|
@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))
|
|
|
|
if id_uri.host == actor_uri.host do
|
|
:ok
|
|
else
|
|
:error
|
|
end
|
|
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)
|
|
|
|
if id_uri.host == other_uri.host do
|
|
:ok
|
|
else
|
|
:error
|
|
end
|
|
end
|
|
|
|
def contain_child(%{"object" => %{"id" => id, "attributedTo" => _} = object}),
|
|
do: contain_origin(id, object)
|
|
|
|
def contain_child(_), do: :ok
|
|
end
|