# Pleroma: A lightweight social networking server
-# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.ActivityPub.MRF.SimplePolicy do
@behaviour Pleroma.Web.ActivityPub.MRF
alias Pleroma.Config
+ alias Pleroma.FollowingRelationship
alias Pleroma.User
alias Pleroma.Web.ActivityPub.MRF
accepts == [] -> {:ok, object}
actor_host == Config.get([Pleroma.Web.Endpoint, :url, :host]) -> {:ok, object}
MRF.subdomain_match?(accepts, actor_host) -> {:ok, object}
- true -> {:reject, nil}
+ true -> {:reject, "[SimplePolicy] host not in accept list"}
end
end
|> MRF.subdomains_regex()
if MRF.subdomain_match?(rejects, actor_host) do
- {:reject, nil}
+ {:reject, "[SimplePolicy] host in reject list"}
else
{:ok, object}
end
"type" => "Create",
"object" => child_object
} = object
- ) do
+ )
+ when is_map(child_object) do
media_nsfw =
Config.get([:mrf_simple, :media_nsfw])
|> MRF.subdomains_regex()
{:ok, object}
end
+ defp intersection(list1, list2) do
+ list1 -- list1 -- list2
+ end
+
+ defp check_followers_only(%{host: actor_host} = _actor_info, object) do
+ followers_only =
+ Config.get([:mrf_simple, :followers_only])
+ |> MRF.subdomains_regex()
+
+ object =
+ with true <- MRF.subdomain_match?(followers_only, actor_host),
+ user <- User.get_cached_by_ap_id(object["actor"]) do
+ # Don't use Map.get/3 intentionally, these must not be nil
+ fixed_to = object["to"] || []
+ fixed_cc = object["cc"] || []
+
+ to = FollowingRelationship.followers_ap_ids(user, fixed_to)
+ cc = FollowingRelationship.followers_ap_ids(user, fixed_cc)
+
+ object
+ |> Map.put("to", intersection([user.follower_address | to], fixed_to))
+ |> Map.put("cc", intersection([user.follower_address | cc], fixed_cc))
+ else
+ _ -> object
+ end
+
+ {:ok, object}
+ end
+
defp check_report_removal(%{host: actor_host} = _actor_info, %{"type" => "Flag"} = object) do
report_removal =
Config.get([:mrf_simple, :report_removal])
|> MRF.subdomains_regex()
if MRF.subdomain_match?(report_removal, actor_host) do
- {:reject, nil}
+ {:reject, "[SimplePolicy] host in report_removal list"}
else
{:ok, object}
end
defp check_banner_removal(_actor_info, object), do: {:ok, object}
+ defp check_object(%{"object" => object} = activity) do
+ with {:ok, _object} <- filter(object) do
+ {:ok, activity}
+ end
+ end
+
+ defp check_object(object), do: {:ok, object}
+
@impl true
def filter(%{"type" => "Delete", "actor" => actor} = object) do
%{host: actor_host} = URI.parse(actor)
|> MRF.subdomains_regex()
if MRF.subdomain_match?(reject_deletes, actor_host) do
- {:reject, nil}
+ {:reject, "[SimplePolicy] host in reject_deletes list"}
else
{:ok, object}
end
{:ok, object} <- check_media_removal(actor_info, object),
{:ok, object} <- check_media_nsfw(actor_info, object),
{:ok, object} <- check_ftl_removal(actor_info, object),
- {:ok, object} <- check_report_removal(actor_info, object) do
+ {:ok, object} <- check_followers_only(actor_info, object),
+ {:ok, object} <- check_report_removal(actor_info, object),
+ {:ok, object} <- check_object(object) do
{:ok, object}
else
- _e -> {:reject, nil}
+ {:reject, nil} -> {:reject, "[SimplePolicy]"}
+ {:reject, _} = e -> e
+ _ -> {:reject, "[SimplePolicy]"}
end
end
{:ok, object} <- check_banner_removal(actor_info, object) do
{:ok, object}
else
- _e -> {:reject, nil}
+ {:reject, nil} -> {:reject, "[SimplePolicy]"}
+ {:reject, _} = e -> e
+ _ -> {:reject, "[SimplePolicy]"}
+ end
+ end
+
+ def filter(object) when is_binary(object) do
+ uri = URI.parse(object)
+
+ with {:ok, object} <- check_accept(uri, object),
+ {:ok, object} <- check_reject(uri, object) do
+ {:ok, object}
+ else
+ {:reject, nil} -> {:reject, "[SimplePolicy]"}
+ {:reject, _} = e -> e
+ _ -> {:reject, "[SimplePolicy]"}
end
end
{:ok, %{mrf_simple: mrf_simple}}
end
+
+ @impl true
+ def config_description do
+ %{
+ key: :mrf_simple,
+ related_policy: "Pleroma.Web.ActivityPub.MRF.SimplePolicy",
+ label: "MRF Simple",
+ description: "Simple ingress policies",
+ children: [
+ %{
+ key: :media_removal,
+ type: {:list, :string},
+ description: "List of instances to strip media attachments from",
+ suggestions: ["example.com", "*.example.com"]
+ },
+ %{
+ key: :media_nsfw,
+ label: "Media NSFW",
+ type: {:list, :string},
+ description: "List of instances to tag all media as NSFW (sensitive) from",
+ suggestions: ["example.com", "*.example.com"]
+ },
+ %{
+ key: :federated_timeline_removal,
+ type: {:list, :string},
+ description:
+ "List of instances to remove from the Federated (aka The Whole Known Network) Timeline",
+ suggestions: ["example.com", "*.example.com"]
+ },
+ %{
+ key: :reject,
+ type: {:list, :string},
+ description: "List of instances to reject activities from (except deletes)",
+ suggestions: ["example.com", "*.example.com"]
+ },
+ %{
+ key: :accept,
+ type: {:list, :string},
+ description: "List of instances to only accept activities from (except deletes)",
+ suggestions: ["example.com", "*.example.com"]
+ },
+ %{
+ key: :followers_only,
+ type: {:list, :string},
+ description: "Force posts from the given instances to be visible by followers only",
+ suggestions: ["example.com", "*.example.com"]
+ },
+ %{
+ key: :report_removal,
+ type: {:list, :string},
+ description: "List of instances to reject reports from",
+ suggestions: ["example.com", "*.example.com"]
+ },
+ %{
+ key: :avatar_removal,
+ type: {:list, :string},
+ description: "List of instances to strip avatars from",
+ suggestions: ["example.com", "*.example.com"]
+ },
+ %{
+ key: :banner_removal,
+ type: {:list, :string},
+ description: "List of instances to strip banners from",
+ suggestions: ["example.com", "*.example.com"]
+ },
+ %{
+ key: :reject_deletes,
+ type: {:list, :string},
+ description: "List of instances to reject deletions from",
+ suggestions: ["example.com", "*.example.com"]
+ }
+ ]
+ }
+ end
end
projects / akkoma / blobdiff