+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
defmodule Pleroma.Web.ActivityPub.MRF.SimplePolicy do
- alias Pleroma.User
+ @moduledoc "Filter activities depending on their origin instance"
@behaviour Pleroma.Web.ActivityPub.MRF
+ alias Pleroma.Config
+ alias Pleroma.FollowingRelationship
+ alias Pleroma.User
+ alias Pleroma.Web.ActivityPub.MRF
+
+ require Pleroma.Constants
+
defp check_accept(%{host: actor_host} = _actor_info, object) do
- accepts = Pleroma.Config.get([:mrf_simple, :accept])
+ accepts =
+ Config.get([:mrf_simple, :accept])
+ |> MRF.subdomains_regex()
cond do
accepts == [] -> {:ok, object}
- Enum.member?(accepts, actor_host) -> {:ok, object}
- true -> {:reject, nil}
+ actor_host == Config.get([Pleroma.Web.Endpoint, :url, :host]) -> {:ok, object}
+ MRF.subdomain_match?(accepts, actor_host) -> {:ok, object}
+ true -> {:reject, "[SimplePolicy] host not in accept list"}
end
end
defp check_reject(%{host: actor_host} = _actor_info, object) do
- if Enum.member?(Pleroma.Config.get([:mrf_simple, :reject]), actor_host) do
- {:reject, nil}
+ rejects =
+ Config.get([:mrf_simple, :reject])
+ |> MRF.subdomains_regex()
+
+ if MRF.subdomain_match?(rejects, actor_host) do
+ {:reject, "[SimplePolicy] host in reject list"}
else
{:ok, object}
end
defp check_media_removal(
%{host: actor_host} = _actor_info,
- %{"type" => "Create", "object" => %{"attachement" => child_attachement}} = object
+ %{"type" => "Create", "object" => %{"attachment" => child_attachment}} = object
)
- when length(child_attachement) > 0 do
+ when length(child_attachment) > 0 do
+ media_removal =
+ Config.get([:mrf_simple, :media_removal])
+ |> MRF.subdomains_regex()
+
object =
- if Enum.member?(Pleroma.Config.get([:mrf_simple, :media_removal]), actor_host) do
+ if MRF.subdomain_match?(media_removal, actor_host) do
child_object = Map.delete(object["object"], "attachment")
Map.put(object, "object", child_object)
else
%{host: actor_host} = _actor_info,
%{
"type" => "Create",
- "object" => %{"attachment" => child_attachment} = child_object
+ "object" => child_object
} = object
- )
- when length(child_attachment) > 0 do
+ ) do
+ media_nsfw =
+ Config.get([:mrf_simple, :media_nsfw])
+ |> MRF.subdomains_regex()
+
object =
- if Enum.member?(Pleroma.Config.get([:mrf_simple, :media_nsfw]), actor_host) do
+ if MRF.subdomain_match?(media_nsfw, actor_host) do
tags = (child_object["tag"] || []) ++ ["nsfw"]
- child_object = Map.put(child_object, "tags", tags)
+ child_object = Map.put(child_object, "tag", tags)
child_object = Map.put(child_object, "sensitive", true)
Map.put(object, "object", child_object)
else
defp check_media_nsfw(_actor_info, object), do: {:ok, object}
defp check_ftl_removal(%{host: actor_host} = _actor_info, object) do
+ timeline_removal =
+ Config.get([:mrf_simple, :federated_timeline_removal])
+ |> MRF.subdomains_regex()
+
object =
- with true <-
- Enum.member?(
- Pleroma.Config.get([:mrf_simple, :federated_timeline_removal]),
- actor_host
- ),
- user <- User.get_by_ap_id(object["actor"]),
- true <- "https://www.w3.org/ns/activitystreams#Public" in object["to"],
- true <- user.follower_address in object["cc"] do
- to =
- List.delete(object["to"], "https://www.w3.org/ns/activitystreams#Public") ++
- [user.follower_address]
-
- cc =
- List.delete(object["cc"], user.follower_address) ++
- ["https://www.w3.org/ns/activitystreams#Public"]
+ with true <- MRF.subdomain_match?(timeline_removal, actor_host),
+ user <- User.get_cached_by_ap_id(object["actor"]),
+ true <- Pleroma.Constants.as_public() in object["to"] do
+ to = List.delete(object["to"], Pleroma.Constants.as_public()) ++ [user.follower_address]
+
+ cc = List.delete(object["cc"], user.follower_address) ++ [Pleroma.Constants.as_public()]
object
|> Map.put("to", to)
{: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, "[SimplePolicy] host in report_removal list"}
+ else
+ {:ok, object}
+ end
+ end
+
+ defp check_report_removal(_actor_info, object), do: {:ok, object}
+
+ defp check_avatar_removal(%{host: actor_host} = _actor_info, %{"icon" => _icon} = object) do
+ avatar_removal =
+ Config.get([:mrf_simple, :avatar_removal])
+ |> MRF.subdomains_regex()
+
+ if MRF.subdomain_match?(avatar_removal, actor_host) do
+ {:ok, Map.delete(object, "icon")}
+ else
+ {:ok, object}
+ end
+ end
+
+ defp check_avatar_removal(_actor_info, object), do: {:ok, object}
+
+ defp check_banner_removal(%{host: actor_host} = _actor_info, %{"image" => _image} = object) do
+ banner_removal =
+ Config.get([:mrf_simple, :banner_removal])
+ |> MRF.subdomains_regex()
+
+ if MRF.subdomain_match?(banner_removal, actor_host) do
+ {:ok, Map.delete(object, "image")}
+ else
+ {:ok, object}
+ end
+ end
+
+ defp check_banner_removal(_actor_info, object), do: {:ok, object}
+
@impl true
- def filter(object) do
- actor_info = URI.parse(object["actor"])
+ def filter(%{"type" => "Delete", "actor" => actor} = object) do
+ %{host: actor_host} = URI.parse(actor)
+
+ reject_deletes =
+ Config.get([:mrf_simple, :reject_deletes])
+ |> MRF.subdomains_regex()
+
+ if MRF.subdomain_match?(reject_deletes, actor_host) do
+ {:reject, "[SimplePolicy] host in reject_deletes list"}
+ else
+ {:ok, object}
+ end
+ end
+
+ @impl true
+ def filter(%{"actor" => actor} = object) do
+ actor_info = URI.parse(actor)
with {:ok, object} <- check_accept(actor_info, object),
{:ok, object} <- check_reject(actor_info, object),
{:ok, object} <- check_media_removal(actor_info, object),
{:ok, object} <- check_media_nsfw(actor_info, object),
- {:ok, object} <- check_ftl_removal(actor_info, object) do
+ {:ok, object} <- check_ftl_removal(actor_info, object),
+ {:ok, object} <- check_followers_only(actor_info, object),
+ {:ok, object} <- check_report_removal(actor_info, object) do
{:ok, object}
else
- _e -> {:reject, nil}
+ {:reject, nil} -> {:reject, "[SimplePolicy]"}
+ {:reject, _} = e -> e
+ _ -> {:reject, "[SimplePolicy]"}
end
end
+
+ def filter(%{"id" => actor, "type" => obj_type} = object)
+ when obj_type in ["Application", "Group", "Organization", "Person", "Service"] do
+ actor_info = URI.parse(actor)
+
+ with {:ok, object} <- check_accept(actor_info, object),
+ {:ok, object} <- check_reject(actor_info, object),
+ {:ok, object} <- check_avatar_removal(actor_info, object),
+ {:ok, object} <- check_banner_removal(actor_info, object) do
+ {:ok, object}
+ else
+ {:reject, nil} -> {:reject, "[SimplePolicy]"}
+ {:reject, _} = e -> e
+ _ -> {:reject, "[SimplePolicy]"}
+ end
+ end
+
+ def filter(object), do: {:ok, object}
+
+ @impl true
+ def describe do
+ exclusions = Config.get([:mrf, :transparency_exclusions])
+
+ mrf_simple =
+ Config.get(:mrf_simple)
+ |> Enum.map(fn {k, v} -> {k, Enum.reject(v, fn v -> v in exclusions end)} end)
+ |> Enum.into(%{})
+
+ {:ok, %{mrf_simple: mrf_simple}}
+ end
end
projects / akkoma / blobdiff