Transmogrifier: Strip internal fields

2025-03-01 17:13:47 +04:00 · 2025-03-01 17:13:47 +04:00 · 88ee385302
commit 88ee385302
parent d6a136f823
2 changed files with 354 additions and 71 deletions
--- a/test/pleroma/web/activity_pub/transmogrifier_test.exs
+++ b/test/pleroma/web/activity_pub/transmogrifier_test.exs
@ -156,6 +156,246 @@ defmodule Pleroma.Web.ActivityPub.TransmogrifierTest do
      # It fetched the quoted post
      assert Object.normalize("https://misskey.io/notes/8vs6wxufd0")
    end
+
+    test "doesn't allow remote edits to fake local likes" do
+      # as a spot check for no internal fields getting injected
+      now = DateTime.utc_now()
+      pub_date = DateTime.to_iso8601(Timex.subtract(now, Timex.Duration.from_minutes(3)))
+      edit_date = DateTime.to_iso8601(now)
+
+      local_user = insert(:user)
+
+      create_data = %{
+        "type" => "Create",
+        "id" => "http://mastodon.example.org/users/admin/statuses/2619539638/activity",
+        "actor" => "http://mastodon.example.org/users/admin",
+        "to" => ["https://www.w3.org/ns/activitystreams#Public"],
+        "cc" => [],
+        "object" => %{
+          "type" => "Note",
+          "id" => "http://mastodon.example.org/users/admin/statuses/2619539638",
+          "attributedTo" => "http://mastodon.example.org/users/admin",
+          "to" => ["https://www.w3.org/ns/activitystreams#Public"],
+          "cc" => [],
+          "published" => pub_date,
+          "content" => "miaow",
+          "likes" => [local_user.ap_id]
+        }
+      }
+
+      update_data =
+        create_data
+        |> Map.put("type", "Update")
+        |> Map.put("id", create_data["object"]["id"] <> "/update/1")
+        |> put_in(["object", "content"], "miaow :3")
+        |> put_in(["object", "updated"], edit_date)
+        |> put_in(["object", "formerRepresentations"], %{
+          "type" => "OrderedCollection",
+          "totalItems" => 1,
+          "orderedItems" => [create_data["object"]]
+        })
+
+      {:ok, %Pleroma.Activity{} = activity} = Transmogrifier.handle_incoming(create_data)
+      %Pleroma.Object{} = object = Object.get_by_ap_id(activity.data["object"])
+      assert object.data["content"] == "miaow"
+      assert object.data["likes"] == []
+      assert object.data["like_count"] == 0
+
+      {:ok, %Pleroma.Activity{} = activity} = Transmogrifier.handle_incoming(update_data)
+      %Pleroma.Object{} = object = Object.get_by_ap_id(activity.data["object"]["id"])
+      assert object.data["content"] == "miaow :3"
+      assert object.data["likes"] == []
+      assert object.data["like_count"] == 0
+    end
+
+    test "strips internal fields from history items in edited notes" do
+      now = DateTime.utc_now()
+      pub_date = DateTime.to_iso8601(Timex.subtract(now, Timex.Duration.from_minutes(3)))
+      edit_date = DateTime.to_iso8601(now)
+
+      local_user = insert(:user)
+
+      create_data = %{
+        "type" => "Create",
+        "id" => "http://mastodon.example.org/users/admin/statuses/2619539638/activity",
+        "actor" => "http://mastodon.example.org/users/admin",
+        "to" => ["https://www.w3.org/ns/activitystreams#Public"],
+        "cc" => [],
+        "object" => %{
+          "type" => "Note",
+          "id" => "http://mastodon.example.org/users/admin/statuses/2619539638",
+          "attributedTo" => "http://mastodon.example.org/users/admin",
+          "to" => ["https://www.w3.org/ns/activitystreams#Public"],
+          "cc" => [],
+          "published" => pub_date,
+          "content" => "miaow",
+          "likes" => [],
+          "like_count" => 0
+        }
+      }
+
+      update_data =
+        create_data
+        |> Map.put("type", "Update")
+        |> Map.put("id", create_data["object"]["id"] <> "/update/1")
+        |> put_in(["object", "content"], "miaow :3")
+        |> put_in(["object", "updated"], edit_date)
+        |> put_in(["object", "formerRepresentations"], %{
+          "type" => "OrderedCollection",
+          "totalItems" => 1,
+          "orderedItems" => [
+            Map.merge(create_data["object"], %{
+              "likes" => [local_user.ap_id],
+              "like_count" => 1,
+              "pleroma" => %{"internal_field" => "should_be_stripped"}
+            })
+          ]
+        })
+
+      {:ok, %Pleroma.Activity{} = activity} = Transmogrifier.handle_incoming(create_data)
+      %Pleroma.Object{} = object = Object.get_by_ap_id(activity.data["object"])
+      assert object.data["content"] == "miaow"
+      assert object.data["likes"] == []
+      assert object.data["like_count"] == 0
+
+      {:ok, %Pleroma.Activity{} = activity} = Transmogrifier.handle_incoming(update_data)
+      %Pleroma.Object{} = object = Object.get_by_ap_id(activity.data["object"]["id"])
+      assert object.data["content"] == "miaow :3"
+      assert object.data["likes"] == []
+      assert object.data["like_count"] == 0
+
+      # Check that internal fields are stripped from history items
+      history_item = List.first(object.data["formerRepresentations"]["orderedItems"])
+      assert history_item["likes"] == []
+      assert history_item["like_count"] == 0
+      refute Map.has_key?(history_item, "pleroma")
+    end
+
+    test "doesn't trip over remote likes in notes" do
+      now = DateTime.utc_now()
+      pub_date = DateTime.to_iso8601(Timex.subtract(now, Timex.Duration.from_minutes(3)))
+      edit_date = DateTime.to_iso8601(now)
+
+      create_data = %{
+        "type" => "Create",
+        "id" => "http://mastodon.example.org/users/admin/statuses/3409297097/activity",
+        "actor" => "http://mastodon.example.org/users/admin",
+        "to" => ["https://www.w3.org/ns/activitystreams#Public"],
+        "cc" => [],
+        "object" => %{
+          "type" => "Note",
+          "id" => "http://mastodon.example.org/users/admin/statuses/3409297097",
+          "attributedTo" => "http://mastodon.example.org/users/admin",
+          "to" => ["https://www.w3.org/ns/activitystreams#Public"],
+          "cc" => [],
+          "published" => pub_date,
+          "content" => "miaow",
+          "likes" => %{
+            "id" => "http://mastodon.example.org/users/admin/statuses/3409297097/likes",
+            "totalItems" => 0,
+            "type" => "Collection"
+          }
+        }
+      }
+
+      update_data =
+        create_data
+        |> Map.put("type", "Update")
+        |> Map.put("id", create_data["object"]["id"] <> "/update/1")
+        |> put_in(["object", "content"], "miaow :3")
+        |> put_in(["object", "updated"], edit_date)
+        |> put_in(["object", "likes", "totalItems"], 666)
+        |> put_in(["object", "formerRepresentations"], %{
+          "type" => "OrderedCollection",
+          "totalItems" => 1,
+          "orderedItems" => [create_data["object"]]
+        })
+
+      {:ok, %Pleroma.Activity{} = activity} = Transmogrifier.handle_incoming(create_data)
+      %Pleroma.Object{} = object = Object.get_by_ap_id(activity.data["object"])
+      assert object.data["content"] == "miaow"
+      assert object.data["likes"] == []
+      assert object.data["like_count"] == 0
+
+      {:ok, %Pleroma.Activity{} = activity} = Transmogrifier.handle_incoming(update_data)
+      %Pleroma.Object{} = object = Object.get_by_ap_id(activity.data["object"]["id"])
+      assert object.data["content"] == "miaow :3"
+      assert object.data["likes"] == []
+      # in the future this should retain remote likes, but for now:
+      assert object.data["like_count"] == 0
+    end
+
+    test "doesn't trip over remote likes in polls" do
+      now = DateTime.utc_now()
+      pub_date = DateTime.to_iso8601(Timex.subtract(now, Timex.Duration.from_minutes(3)))
+      edit_date = DateTime.to_iso8601(now)
+
+      create_data = %{
+        "type" => "Create",
+        "id" => "http://mastodon.example.org/users/admin/statuses/2471790073/activity",
+        "actor" => "http://mastodon.example.org/users/admin",
+        "to" => ["https://www.w3.org/ns/activitystreams#Public"],
+        "cc" => [],
+        "object" => %{
+          "type" => "Question",
+          "id" => "http://mastodon.example.org/users/admin/statuses/2471790073",
+          "attributedTo" => "http://mastodon.example.org/users/admin",
+          "to" => ["https://www.w3.org/ns/activitystreams#Public"],
+          "cc" => [],
+          "published" => pub_date,
+          "content" => "vote!",
+          "anyOf" => [
+            %{
+              "type" => "Note",
+              "name" => "a",
+              "replies" => %{
+                "type" => "Collection",
+                "totalItems" => 3
+              }
+            },
+            %{
+              "type" => "Note",
+              "name" => "b",
+              "replies" => %{
+                "type" => "Collection",
+                "totalItems" => 1
+              }
+            }
+          ],
+          "likes" => %{
+            "id" => "http://mastodon.example.org/users/admin/statuses/2471790073/likes",
+            "totalItems" => 0,
+            "type" => "Collection"
+          }
+        }
+      }
+
+      update_data =
+        create_data
+        |> Map.put("type", "Update")
+        |> Map.put("id", create_data["object"]["id"] <> "/update/1")
+        |> put_in(["object", "content"], "vote now!")
+        |> put_in(["object", "updated"], edit_date)
+        |> put_in(["object", "likes", "totalItems"], 666)
+        |> put_in(["object", "formerRepresentations"], %{
+          "type" => "OrderedCollection",
+          "totalItems" => 1,
+          "orderedItems" => [create_data["object"]]
+        })
+
+      {:ok, %Pleroma.Activity{} = activity} = Transmogrifier.handle_incoming(create_data)
+      %Pleroma.Object{} = object = Object.get_by_ap_id(activity.data["object"])
+      assert object.data["content"] == "vote!"
+      assert object.data["likes"] == []
+      assert object.data["like_count"] == 0
+
+      {:ok, %Pleroma.Activity{} = activity} = Transmogrifier.handle_incoming(update_data)
+      %Pleroma.Object{} = object = Object.get_by_ap_id(activity.data["object"]["id"])
+      assert object.data["content"] == "vote now!"
+      assert object.data["likes"] == []
+      # in the future this should retain remote likes, but for now:
+      assert object.data["like_count"] == 0
+    end
  end

  describe "prepare outgoing" do