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diff --git a/lib/pleroma/object/containment.ex b/lib/pleroma/object/containment.ex
index a1f9c1250..25aa32f60 100644
--- a/lib/pleroma/object/containment.ex
+++ b/lib/pleroma/object/containment.ex
@@ -1,80 +1,82 @@
# 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(_id, _data), do: :error
+
def contain_origin_from_id(id, %{"id" => other_id} = _params) when is_binary(other_id) do
id_uri = URI.parse(id)
other_uri = URI.parse(other_id)
compare_uris(id_uri, other_uri)
end
def contain_origin_from_id(_id, _data), do: :error
def contain_child(%{"object" => %{"id" => id, "attributedTo" => _} = object}),
do: contain_origin(id, object)
def contain_child(_), do: :ok
end
diff --git a/test/object/containment_test.exs b/test/object/containment_test.exs
index 71fe5204c..7636803a6 100644
--- a/test/object/containment_test.exs
+++ b/test/object/containment_test.exs
@@ -1,115 +1,125 @@
# Pleroma: A lightweight social networking server
# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Object.ContainmentTest do
use Pleroma.DataCase
alias Pleroma.Object.Containment
alias Pleroma.User
import Pleroma.Factory
import ExUnit.CaptureLog
setup_all do
Tesla.Mock.mock_global(fn env -> apply(HttpRequestMock, :request, [env]) end)
:ok
end
describe "general origin containment" do
+ test "works for completely actorless posts" do
+ assert :error ==
+ Containment.contain_origin("https://glaceon.social/users/monorail", %{
+ "deleted" => "2019-10-30T05:48:50.249606Z",
+ "formerType" => "Note",
+ "id" => "https://glaceon.social/users/monorail/statuses/103049757364029187",
+ "type" => "Tombstone"
+ })
+ end
+
test "contain_origin_from_id() catches obvious spoofing attempts" do
data = %{
"id" => "http://example.com/~alyssa/activities/1234.json"
}
:error =
Containment.contain_origin_from_id(
"http://example.org/~alyssa/activities/1234.json",
data
)
end
test "contain_origin_from_id() allows alternate IDs within the same origin domain" do
data = %{
"id" => "http://example.com/~alyssa/activities/1234.json"
}
:ok =
Containment.contain_origin_from_id(
"http://example.com/~alyssa/activities/1234",
data
)
end
test "contain_origin_from_id() allows matching IDs" do
data = %{
"id" => "http://example.com/~alyssa/activities/1234.json"
}
:ok =
Containment.contain_origin_from_id(
"http://example.com/~alyssa/activities/1234.json",
data
)
end
test "users cannot be collided through fake direction spoofing attempts" do
_user =
insert(:user, %{
nickname: "rye@niu.moe",
local: false,
ap_id: "https://niu.moe/users/rye",
follower_address: User.ap_followers(%User{nickname: "rye@niu.moe"})
})
assert capture_log(fn ->
{:error, _} = User.get_or_fetch_by_ap_id("https://n1u.moe/users/rye")
end) =~
"[error] Could not decode user at fetch https://n1u.moe/users/rye"
end
test "contain_origin_from_id() gracefully handles cases where no ID is present" do
data = %{
"type" => "Create",
"object" => %{
"id" => "http://example.net/~alyssa/activities/1234",
"attributedTo" => "http://example.org/~alyssa"
},
"actor" => "http://example.com/~bob"
}
:error =
Containment.contain_origin_from_id("http://example.net/~alyssa/activities/1234", data)
end
end
describe "containment of children" do
test "contain_child() catches spoofing attempts" do
data = %{
"id" => "http://example.com/whatever",
"type" => "Create",
"object" => %{
"id" => "http://example.net/~alyssa/activities/1234",
"attributedTo" => "http://example.org/~alyssa"
},
"actor" => "http://example.com/~bob"
}
:error = Containment.contain_child(data)
end
test "contain_child() allows correct origins" do
data = %{
"id" => "http://example.org/~alyssa/activities/5678",
"type" => "Create",
"object" => %{
"id" => "http://example.org/~alyssa/activities/1234",
"attributedTo" => "http://example.org/~alyssa"
},
"actor" => "http://example.org/~alyssa"
}
:ok = Containment.contain_child(data)
end
end
end

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