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diff --git a/changelog.d/object-age-non-public.security b/changelog.d/object-age-non-public.security
new file mode 100644
index 000000000..aee358d38
--- /dev/null
+++ b/changelog.d/object-age-non-public.security
@@ -0,0 +1 @@
+ObjectAgePolicy no longer makes old DMs and followers-only posts public
diff --git a/lib/pleroma/web/activity_pub/mrf/object_age_policy.ex b/lib/pleroma/web/activity_pub/mrf/object_age_policy.ex
index 00f4cf84b..25ae02f60 100644
--- a/lib/pleroma/web/activity_pub/mrf/object_age_policy.ex
+++ b/lib/pleroma/web/activity_pub/mrf/object_age_policy.ex
@@ -36,16 +36,34 @@ defmodule Pleroma.Web.ActivityPub.MRF.ObjectAgePolicy do
end
end
+ @spec delete_and_count(list(), term()) :: {integer(), list()}
+ defp delete_and_count(list, element), do: delete_and_count(list, element, {0, [], list})
+
+ defp delete_and_count([], _element, {0, _nlist, olist}), do: {0, olist}
+ defp delete_and_count([], _element, {count, nlist, _olist}), do: {count, Enum.reverse(nlist)}
+
+ defp delete_and_count([h | r], h, {count, nlist, olist}),
+ do: delete_and_count(r, h, {count + 1, nlist, olist})
+
+ defp delete_and_count([h | r], element, {count, nlist, olist}),
+ do: delete_and_count(r, element, {count, [h | nlist], olist})
+
+ defp insert_if_needed(list, oldcount, element) do
+ if oldcount <= 0 || Enum.member?(list, element) do
+ list
+ else
+ [element | list]
+ end
+ end
+
defp check_delist(activity, actions) do
if :delist in actions do
with %User{} = user <- User.get_cached_by_ap_id(activity["actor"]) do
- to =
- List.delete(activity["to"] || [], Pleroma.Constants.as_public()) ++
- [user.follower_address]
+ {pubcnt, to} = delete_and_count(activity["to"] || [], Pleroma.Constants.as_public())
+ {flwcnt, cc} = delete_and_count(activity["cc"] || [], user.follower_address)
- cc =
- List.delete(activity["cc"] || [], user.follower_address) ++
- [Pleroma.Constants.as_public()]
+ cc = insert_if_needed(cc, pubcnt, Pleroma.Constants.as_public())
+ to = insert_if_needed(to, flwcnt, user.follower_address)
activity =
activity
@@ -67,8 +85,8 @@ defmodule Pleroma.Web.ActivityPub.MRF.ObjectAgePolicy do
defp check_strip_followers(activity, actions) do
if :strip_followers in actions do
with %User{} = user <- User.get_cached_by_ap_id(activity["actor"]) do
- to = List.delete(activity["to"] || [], user.follower_address)
- cc = List.delete(activity["cc"] || [], user.follower_address)
+ {_, to} = delete_and_count(activity["to"] || [], user.follower_address)
+ {_, cc} = delete_and_count(activity["cc"] || [], user.follower_address)
activity =
activity
diff --git a/test/pleroma/web/activity_pub/mrf/object_age_policy_test.exs b/test/pleroma/web/activity_pub/mrf/object_age_policy_test.exs
index 7a67645aa..119a54717 100644
--- a/test/pleroma/web/activity_pub/mrf/object_age_policy_test.exs
+++ b/test/pleroma/web/activity_pub/mrf/object_age_policy_test.exs
@@ -8,6 +8,8 @@ defmodule Pleroma.Web.ActivityPub.MRF.ObjectAgePolicyTest do
alias Pleroma.Web.ActivityPub.MRF.ObjectAgePolicy
alias Pleroma.Web.ActivityPub.Visibility
+ require Pleroma.Constants
+
setup do:
clear_config(:mrf_object_age,
threshold: 172_800,
@@ -79,7 +81,7 @@ defmodule Pleroma.Web.ActivityPub.MRF.ObjectAgePolicyTest do
{:ok, data} = ObjectAgePolicy.filter(data)
- assert Visibility.get_visibility(%{data: data}) == "unlisted"
+ assert Visibility.get_visibility(%{data: data}) == "direct"
end
test "it delists an old post" do
@@ -94,6 +96,90 @@ defmodule Pleroma.Web.ActivityPub.MRF.ObjectAgePolicyTest do
assert Visibility.get_visibility(%{data: data}) == "unlisted"
end
+ test "it keeps an old followers-only post private" do
+ clear_config([:mrf_object_age, :actions], [:delist])
+
+ data = get_old_message()
+ {:ok, user} = User.get_or_fetch_by_ap_id(data["actor"])
+
+ data =
+ data
+ |> Map.put("to", [user.follower_address])
+ |> Map.put("cc", [])
+ |> put_in(["object", "to"], [user.follower_address])
+ |> put_in(["object", "cc"], [])
+
+ {:ok, data} = ObjectAgePolicy.filter(data)
+
+ assert data["to"] == [user.follower_address]
+ assert data["cc"] == []
+ assert Visibility.get_visibility(%{data: data}) == "private"
+ assert data["object"]["to"] == data["to"]
+ assert data["object"]["cc"] == data["cc"]
+ end
+
+ test "it keeps an old direct message direct" do
+ clear_config([:mrf_object_age, :actions], [:delist])
+
+ data = get_old_message()
+ {:ok, _user} = User.get_or_fetch_by_ap_id(data["actor"])
+ recipient = "https://example.com/users/someone"
+
+ data =
+ data
+ |> Map.put("to", [recipient])
+ |> Map.put("cc", [])
+ |> put_in(["object", "to"], [recipient])
+ |> put_in(["object", "cc"], [])
+
+ {:ok, data} = ObjectAgePolicy.filter(data)
+
+ assert data["to"] == [recipient]
+ assert data["cc"] == []
+ assert Visibility.get_visibility(%{data: data}) == "direct"
+ end
+
+ test "it removes every copy of the follower address" do
+ clear_config([:mrf_object_age, :actions], [:strip_followers])
+
+ data = get_old_message()
+ {:ok, user} = User.get_or_fetch_by_ap_id(data["actor"])
+ public = Pleroma.Constants.as_public()
+ followers = [user.follower_address, user.follower_address]
+
+ data =
+ data
+ |> Map.put("to", [public])
+ |> Map.put("cc", followers)
+ |> put_in(["object", "to"], [public])
+ |> put_in(["object", "cc"], followers)
+
+ {:ok, data} = ObjectAgePolicy.filter(data)
+
+ assert data["to"] == [public]
+ assert data["cc"] == []
+ end
+
+ test "it does not duplicate addresses of an old unlisted post" do
+ clear_config([:mrf_object_age, :actions], [:delist, :strip_followers])
+
+ data = get_old_message()
+ {:ok, user} = User.get_or_fetch_by_ap_id(data["actor"])
+ public = Pleroma.Constants.as_public()
+
+ data =
+ data
+ |> Map.put("to", [user.follower_address])
+ |> Map.put("cc", [public])
+ |> put_in(["object", "to"], [user.follower_address])
+ |> put_in(["object", "cc"], [public])
+
+ {:ok, data} = ObjectAgePolicy.filter(data)
+
+ assert data["to"] == []
+ assert data["cc"] == [public]
+ end
+
test "it allows a new post" do
clear_config([:mrf_object_age, :actions], [:delist])

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