From 6dc78f5f6f8c607c90246ff30520aeb2f84634df Mon Sep 17 00:00:00 2001 From: "Haelwenn (lanodan) Monnier" Date: Fri, 18 Sep 2020 14:22:27 +0200 Subject: [PATCH] AP C2S: Remove restrictions and make it go through pipeline --- CHANGELOG.md | 1 + lib/pleroma/activity.ex | 3 +- .../activity_pub/activity_pub_controller.ex | 104 +++++++++--------- .../web/activity_pub/object_validator.ex | 2 + .../activity_pub_controller_test.exs | 31 +++--- 5 files changed, 77 insertions(+), 64 deletions(-) diff --git a/CHANGELOG.md b/CHANGELOG.md index 9854eb531..036b9e775 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -14,6 +14,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/). - HTTPSecurityPlug now sends a response header to opt out of Google's FLoC (Federated Learning of Cohorts) targeted advertising. - Email address is now returned if requesting user is the owner of the user account so it can be exposed in client and FE user settings UIs. - Improved Twittercard and OpenGraph meta tag generation including thumbnails and image dimension metadata when available. +- ActivityPub Client-to-Server(C2S): Limitation on the type of Activity/Object are lifted as they are now passed through ObjectValidators ### Added diff --git a/lib/pleroma/activity.ex b/lib/pleroma/activity.ex index 7e36c1b53..6a991c48e 100644 --- a/lib/pleroma/activity.ex +++ b/lib/pleroma/activity.ex @@ -292,7 +292,8 @@ def get_in_reply_to_activity(%Activity{} = activity) do get_in_reply_to_activity_from_object(Object.normalize(activity, fetch: false)) end - def normalize(obj) when is_map(obj), do: get_by_ap_id_with_object(obj["id"]) + def normalize(%Activity{data: %{"id" => ap_id}}), do: get_by_ap_id_with_object(ap_id) + def normalize(%{"id" => ap_id}), do: get_by_ap_id_with_object(ap_id) def normalize(ap_id) when is_binary(ap_id), do: get_by_ap_id_with_object(ap_id) def normalize(_), do: nil diff --git a/lib/pleroma/web/activity_pub/activity_pub_controller.ex b/lib/pleroma/web/activity_pub/activity_pub_controller.ex index 5aa3b281a..57ac40b42 100644 --- a/lib/pleroma/web/activity_pub/activity_pub_controller.ex +++ b/lib/pleroma/web/activity_pub/activity_pub_controller.ex @@ -11,7 +11,6 @@ defmodule Pleroma.Web.ActivityPub.ActivityPubController do alias Pleroma.Object.Fetcher alias Pleroma.User alias Pleroma.Web.ActivityPub.ActivityPub - alias Pleroma.Web.ActivityPub.Builder alias Pleroma.Web.ActivityPub.InternalFetchActor alias Pleroma.Web.ActivityPub.ObjectView alias Pleroma.Web.ActivityPub.Pipeline @@ -403,83 +402,90 @@ def read_inbox(%{assigns: %{user: %User{nickname: as_nickname}}} = conn, %{ |> json(err) end - defp handle_user_activity( - %User{} = user, - %{"type" => "Create", "object" => %{"type" => "Note"} = object} = params - ) do - content = if is_binary(object["content"]), do: object["content"], else: "" - name = if is_binary(object["name"]), do: object["name"], else: "" - summary = if is_binary(object["summary"]), do: object["summary"], else: "" - length = String.length(content <> name <> summary) + defp fix_user_message(%User{ap_id: actor}, %{"type" => "Create", "object" => object} = activity) + when is_map(object) do + length = + [object["content"], object["summary"], object["name"]] + |> Enum.filter(&is_binary(&1)) + |> Enum.join("") + |> String.length() - if length > Pleroma.Config.get([:instance, :limit]) do - {:error, dgettext("errors", "Note is over the character limit")} - else + limit = Pleroma.Config.get([:instance, :limit]) + + if length < limit do object = object - |> Map.merge(Map.take(params, ["to", "cc"])) - |> Map.put("attributedTo", user.ap_id) - |> Transmogrifier.fix_object() + |> Transmogrifier.strip_internal_fields() + |> Map.put("attributedTo", actor) + |> Map.put("actor", actor) + |> Map.put("id", Utils.generate_object_id()) - ActivityPub.create(%{ - to: params["to"], - actor: user, - context: object["context"], - object: object, - additional: Map.take(params, ["cc"]) - }) - end - end - - defp handle_user_activity(%User{} = user, %{"type" => "Delete"} = params) do - with %Object{} = object <- Object.normalize(params["object"], fetch: false), - true <- user.is_moderator || user.ap_id == object.data["actor"], - {:ok, delete_data, _} <- Builder.delete(user, object.data["id"]), - {:ok, delete, _} <- Pipeline.common_pipeline(delete_data, local: true) do - {:ok, delete} + {:ok, Map.put(activity, "object", object)} else - _ -> {:error, dgettext("errors", "Can't delete object")} + {:error, + dgettext( + "errors", + "Character limit (%{limit} characters) exceeded, contains %{length} characters", + limit: limit, + length: length + )} end end - defp handle_user_activity(%User{} = user, %{"type" => "Like"} = params) do - with %Object{} = object <- Object.normalize(params["object"], fetch: false), - {_, {:ok, like_object, meta}} <- {:build_object, Builder.like(user, object)}, - {_, {:ok, %Activity{} = activity, _meta}} <- - {:common_pipeline, - Pipeline.common_pipeline(like_object, Keyword.put(meta, :local, true))} do + defp fix_user_message( + %User{ap_id: actor} = user, + %{"type" => "Delete", "object" => object} = activity + ) do + with {_, %Object{data: object_data}} <- {:normalize, Object.normalize(object, fetch: false)}, + {_, true} <- {:permission, user.is_moderator || actor == object_data["actor"]} do {:ok, activity} else - _ -> {:error, dgettext("errors", "Can't like object")} + {:normalize, _} -> + {:error, "No such object found"} + + {:permission, _} -> + {:forbidden, "You can't delete this object"} end end - defp handle_user_activity(_, _) do - {:error, dgettext("errors", "Unhandled activity type")} + defp fix_user_message(%User{}, activity) do + {:ok, activity} end def update_outbox( - %{assigns: %{user: %User{nickname: nickname} = user}} = conn, + %{assigns: %{user: %User{nickname: nickname, ap_id: actor} = user}} = conn, %{"nickname" => nickname} = params ) do - actor = user.ap_id - params = params - |> Map.drop(["id"]) + |> Map.drop(["nickname"]) + |> Map.put("id", Utils.generate_activity_id()) |> Map.put("actor", actor) - |> Transmogrifier.fix_addressing() - with {:ok, %Activity{} = activity} <- handle_user_activity(user, params) do + with {:ok, params} <- fix_user_message(user, params), + {:ok, activity, _} <- Pipeline.common_pipeline(params, local: true), + %Activity{data: activity_data} <- Activity.normalize(activity) do conn |> put_status(:created) - |> put_resp_header("location", activity.data["id"]) - |> json(activity.data) + |> put_resp_header("location", activity_data["id"]) + |> json(activity_data) else + {:forbidden, message} -> + conn + |> put_status(:forbidden) + |> json(message) + {:error, message} -> conn |> put_status(:bad_request) |> json(message) + + e -> + Logger.warn(fn -> "AP C2S: #{inspect(e)}" end) + + conn + |> put_status(:bad_request) + |> json("Bad Request") end end diff --git a/lib/pleroma/web/activity_pub/object_validator.ex b/lib/pleroma/web/activity_pub/object_validator.ex index 248a12a36..50999539c 100644 --- a/lib/pleroma/web/activity_pub/object_validator.ex +++ b/lib/pleroma/web/activity_pub/object_validator.ex @@ -175,6 +175,8 @@ def validate(%{"type" => type} = object, meta) when type in ~w(Add Remove) do end end + def validate(o, m), do: {:error, {:validator_not_set, {o, m}}} + def cast_and_apply(%{"type" => "ChatMessage"} = object) do ChatMessageValidator.cast_and_apply(object) end diff --git a/test/pleroma/web/activity_pub/activity_pub_controller_test.exs b/test/pleroma/web/activity_pub/activity_pub_controller_test.exs index c7039d1f8..50315e21f 100644 --- a/test/pleroma/web/activity_pub/activity_pub_controller_test.exs +++ b/test/pleroma/web/activity_pub/activity_pub_controller_test.exs @@ -1334,9 +1334,12 @@ test "It returns poll Answers when authenticated", %{conn: conn} do activity: %{ "@context" => "https://www.w3.org/ns/activitystreams", "type" => "Create", - "object" => %{"type" => "Note", "content" => "AP C2S test"}, - "to" => "https://www.w3.org/ns/activitystreams#Public", - "cc" => [] + "object" => %{ + "type" => "Note", + "content" => "AP C2S test", + "to" => "https://www.w3.org/ns/activitystreams#Public", + "cc" => [] + } } ] end @@ -1442,19 +1445,19 @@ test "it erects a tombstone when receiving a delete activity", %{conn: conn} do user = User.get_cached_by_ap_id(note_activity.data["actor"]) data = %{ - type: "Delete", - object: %{ - id: note_object.data["id"] + "type" => "Delete", + "object" => %{ + "id" => note_object.data["id"] } } - conn = + result = conn |> assign(:user, user) |> put_req_header("content-type", "application/activity+json") |> post("/users/#{user.nickname}/outbox", data) + |> json_response(201) - result = json_response(conn, 201) assert Activity.get_by_ap_id(result["id"]) assert object = Object.get_by_ap_id(note_object.data["id"]) @@ -1479,7 +1482,7 @@ test "it rejects delete activity of object from other actor", %{conn: conn} do |> put_req_header("content-type", "application/activity+json") |> post("/users/#{user.nickname}/outbox", data) - assert json_response(conn, 400) + assert json_response(conn, 403) end test "it increases like count when receiving a like action", %{conn: conn} do @@ -1557,7 +1560,7 @@ test "Character limitation", %{conn: conn, activity: activity} do |> post("/users/#{user.nickname}/outbox", activity) |> json_response(400) - assert result == "Note is over the character limit" + assert result == "Character limit (5 characters) exceeded, contains 11 characters" end end @@ -1934,10 +1937,10 @@ test "POST /api/ap/upload_media", %{conn: conn} do "object" => %{ "type" => "Note", "content" => "AP C2S test, attachment", - "attachment" => [object] - }, - "to" => "https://www.w3.org/ns/activitystreams#Public", - "cc" => [] + "attachment" => [object], + "to" => "https://www.w3.org/ns/activitystreams#Public", + "cc" => [] + } } activity_response =