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# Pleroma: A lightweight social networking server
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# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Web.ActivityPub.ObjectValidators.DeleteValidator do
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use Ecto.Schema
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alias Pleroma.Activity
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alias Pleroma.User
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alias Pleroma.Web.ActivityPub.ObjectValidators.Types
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import Ecto.Changeset
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import Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations
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@primary_key false
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embedded_schema do
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field(:id, Types.ObjectID, primary_key: true)
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field(:type, :string)
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field(:actor, Types.ObjectID)
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field(:to, Types.Recipients, default: [])
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field(:cc, Types.Recipients, default: [])
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field(:deleted_activity_id, Types.ObjectID)
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field(:object, Types.ObjectID)
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end
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def cast_data(data) do
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%__MODULE__{}
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|> cast(data, __schema__(:fields))
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end
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def add_deleted_activity_id(cng) do
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object =
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cng
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|> get_field(:object)
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with %Activity{id: id} <- Activity.get_create_by_object_ap_id(object) do
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cng
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|> put_change(:deleted_activity_id, id)
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else
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_ -> cng
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end
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end
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@deletable_types ~w{
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Answer
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Article
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Audio
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Event
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Note
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Page
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Question
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Video
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}
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def validate_data(cng) do
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cng
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|> validate_required([:id, :type, :actor, :to, :cc, :object])
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|> validate_inclusion(:type, ["Delete"])
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|> validate_actor_presence()
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|> validate_deletion_rights()
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|> validate_object_or_user_presence(allowed_types: @deletable_types)
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|> add_deleted_activity_id()
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end
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def do_not_federate?(cng) do
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!same_domain?(cng)
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end
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defp same_domain?(cng) do
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actor_uri =
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cng
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|> get_field(:actor)
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|> URI.parse()
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object_uri =
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cng
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|> get_field(:object)
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|> URI.parse()
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object_uri.host == actor_uri.host
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end
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def validate_deletion_rights(cng) do
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actor = User.get_cached_by_ap_id(get_field(cng, :actor))
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if User.superuser?(actor) || same_domain?(cng) do
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cng
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else
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cng
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|> add_error(:actor, "is not allowed to delete object")
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end
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end
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def cast_and_validate(data) do
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data
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|> cast_data
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|> validate_data
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end
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end
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@ -0,0 +1,86 @@
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# Pleroma: A lightweight social networking server
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# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Web.ActivityPub.Transmogrifier.DeleteHandlingTest do
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use Oban.Testing, repo: Pleroma.Repo
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use Pleroma.DataCase
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alias Pleroma.Activity
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alias Pleroma.Object
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alias Pleroma.Tests.ObanHelpers
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alias Pleroma.User
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alias Pleroma.Web.ActivityPub.Transmogrifier
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import Pleroma.Factory
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setup_all do
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Tesla.Mock.mock_global(fn env -> apply(HttpRequestMock, :request, [env]) end)
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:ok
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end
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test "it works for incoming deletes" do
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activity = insert(:note_activity)
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deleting_user = insert(:user)
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data =
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File.read!("test/fixtures/mastodon-delete.json")
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|> Poison.decode!()
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|> Map.put("actor", deleting_user.ap_id)
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|> put_in(["object", "id"], activity.data["object"])
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{:ok, %Activity{actor: actor, local: false, data: %{"id" => id}}} =
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Transmogrifier.handle_incoming(data)
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assert id == data["id"]
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# We delete the Create activity because we base our timelines on it.
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# This should be changed after we unify objects and activities
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refute Activity.get_by_id(activity.id)
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assert actor == deleting_user.ap_id
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# Objects are replaced by a tombstone object.
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object = Object.normalize(activity.data["object"])
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assert object.data["type"] == "Tombstone"
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end
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test "it fails for incoming deletes with spoofed origin" do
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activity = insert(:note_activity)
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%{ap_id: ap_id} = insert(:user, ap_id: "https://gensokyo.2hu/users/raymoo")
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data =
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File.read!("test/fixtures/mastodon-delete.json")
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|> Poison.decode!()
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|> Map.put("actor", ap_id)
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|> put_in(["object", "id"], activity.data["object"])
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assert match?({:error, _}, Transmogrifier.handle_incoming(data))
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end
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@tag capture_log: true
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test "it works for incoming user deletes" do
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%{ap_id: ap_id} = insert(:user, ap_id: "http://mastodon.example.org/users/admin")
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data =
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File.read!("test/fixtures/mastodon-delete-user.json")
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|> Poison.decode!()
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{:ok, _} = Transmogrifier.handle_incoming(data)
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ObanHelpers.perform_all()
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assert User.get_cached_by_ap_id(ap_id).deactivated
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end
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test "it fails for incoming user deletes with spoofed origin" do
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%{ap_id: ap_id} = insert(:user)
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data =
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File.read!("test/fixtures/mastodon-delete-user.json")
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|> Poison.decode!()
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|> Map.put("actor", ap_id)
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assert match?({:error, _}, Transmogrifier.handle_incoming(data))
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assert User.get_cached_by_ap_id(ap_id)
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end
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end
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