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diff --git a/lib/pleroma/web/activity_pub/mrf/simple_policy.ex b/lib/pleroma/web/activity_pub/mrf/simple_policy.ex
index 4edc007fd..b23f263f5 100644
--- a/lib/pleroma/web/activity_pub/mrf/simple_policy.ex
+++ b/lib/pleroma/web/activity_pub/mrf/simple_policy.ex
@@ -1,194 +1,197 @@
# 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
alias Pleroma.Web.ActivityPub.MRF
@moduledoc "Filter activities depending on their origin instance"
@behaviour Pleroma.Web.ActivityPub.MRF
require Pleroma.Constants
defp check_accept(%{host: actor_host} = _actor_info, object) do
accepts =
Pleroma.Config.get([:mrf_simple, :accept])
|> MRF.subdomains_regex()
cond do
accepts == [] -> {:ok, object}
actor_host == Pleroma.Config.get([Pleroma.Web.Endpoint, :url, :host]) -> {:ok, object}
MRF.subdomain_match?(accepts, actor_host) -> {:ok, object}
true -> {:reject, nil}
end
end
defp check_reject(%{host: actor_host} = _actor_info, object) do
rejects =
Pleroma.Config.get([:mrf_simple, :reject])
|> MRF.subdomains_regex()
if MRF.subdomain_match?(rejects, actor_host) do
{:reject, nil}
else
{:ok, object}
end
end
defp check_media_removal(
%{host: actor_host} = _actor_info,
%{"type" => "Create", "object" => %{"attachment" => child_attachment}} = object
)
when length(child_attachment) > 0 do
media_removal =
Pleroma.Config.get([:mrf_simple, :media_removal])
|> MRF.subdomains_regex()
object =
if MRF.subdomain_match?(media_removal, actor_host) do
child_object = Map.delete(object["object"], "attachment")
Map.put(object, "object", child_object)
else
object
end
{:ok, object}
end
defp check_media_removal(_actor_info, object), do: {:ok, object}
defp check_media_nsfw(
%{host: actor_host} = _actor_info,
%{
"type" => "Create",
"object" => child_object
} = object
) do
media_nsfw =
Pleroma.Config.get([:mrf_simple, :media_nsfw])
|> MRF.subdomains_regex()
object =
if MRF.subdomain_match?(media_nsfw, actor_host) do
tags = (child_object["tag"] || []) ++ ["nsfw"]
child_object = Map.put(child_object, "tag", tags)
child_object = Map.put(child_object, "sensitive", true)
Map.put(object, "object", child_object)
else
object
end
{:ok, object}
end
defp check_media_nsfw(_actor_info, object), do: {:ok, object}
defp check_ftl_removal(%{host: actor_host} = _actor_info, object) do
timeline_removal =
Pleroma.Config.get([:mrf_simple, :federated_timeline_removal])
|> MRF.subdomains_regex()
object =
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)
|> Map.put("cc", cc)
else
_ -> object
end
{:ok, object}
end
defp check_report_removal(%{host: actor_host} = _actor_info, %{"type" => "Flag"} = object) do
report_removal =
Pleroma.Config.get([:mrf_simple, :report_removal])
|> MRF.subdomains_regex()
if MRF.subdomain_match?(report_removal, actor_host) do
{:reject, nil}
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 =
Pleroma.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 =
Pleroma.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(%{"type" => "Delete"} = object), do: {:ok, object}
+
@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),
{:ok, object} <- check_report_removal(actor_info, object) do
{:ok, object}
else
_e -> {:reject, nil}
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
_e -> {:reject, nil}
end
end
def filter(object), do: {:ok, object}
@impl true
def describe do
exclusions = Pleroma.Config.get([:instance, :mrf_transparency_exclusions])
mrf_simple =
Pleroma.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
diff --git a/test/web/activity_pub/mrf/simple_policy_test.exs b/test/web/activity_pub/mrf/simple_policy_test.exs
index 91c24c2d9..eaa595706 100644
--- a/test/web/activity_pub/mrf/simple_policy_test.exs
+++ b/test/web/activity_pub/mrf/simple_policy_test.exs
@@ -1,411 +1,434 @@
# 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.SimplePolicyTest do
use Pleroma.DataCase
import Pleroma.Factory
alias Pleroma.Config
alias Pleroma.Web.ActivityPub.MRF.SimplePolicy
setup do:
clear_config(:mrf_simple,
media_removal: [],
media_nsfw: [],
federated_timeline_removal: [],
report_removal: [],
reject: [],
accept: [],
avatar_removal: [],
banner_removal: []
)
describe "when :media_removal" do
test "is empty" do
Config.put([:mrf_simple, :media_removal], [])
media_message = build_media_message()
local_message = build_local_message()
assert SimplePolicy.filter(media_message) == {:ok, media_message}
assert SimplePolicy.filter(local_message) == {:ok, local_message}
end
test "has a matching host" do
Config.put([:mrf_simple, :media_removal], ["remote.instance"])
media_message = build_media_message()
local_message = build_local_message()
assert SimplePolicy.filter(media_message) ==
{:ok,
media_message
|> Map.put("object", Map.delete(media_message["object"], "attachment"))}
assert SimplePolicy.filter(local_message) == {:ok, local_message}
end
test "match with wildcard domain" do
Config.put([:mrf_simple, :media_removal], ["*.remote.instance"])
media_message = build_media_message()
local_message = build_local_message()
assert SimplePolicy.filter(media_message) ==
{:ok,
media_message
|> Map.put("object", Map.delete(media_message["object"], "attachment"))}
assert SimplePolicy.filter(local_message) == {:ok, local_message}
end
end
describe "when :media_nsfw" do
test "is empty" do
Config.put([:mrf_simple, :media_nsfw], [])
media_message = build_media_message()
local_message = build_local_message()
assert SimplePolicy.filter(media_message) == {:ok, media_message}
assert SimplePolicy.filter(local_message) == {:ok, local_message}
end
test "has a matching host" do
Config.put([:mrf_simple, :media_nsfw], ["remote.instance"])
media_message = build_media_message()
local_message = build_local_message()
assert SimplePolicy.filter(media_message) ==
{:ok,
media_message
|> put_in(["object", "tag"], ["foo", "nsfw"])
|> put_in(["object", "sensitive"], true)}
assert SimplePolicy.filter(local_message) == {:ok, local_message}
end
test "match with wildcard domain" do
Config.put([:mrf_simple, :media_nsfw], ["*.remote.instance"])
media_message = build_media_message()
local_message = build_local_message()
assert SimplePolicy.filter(media_message) ==
{:ok,
media_message
|> put_in(["object", "tag"], ["foo", "nsfw"])
|> put_in(["object", "sensitive"], true)}
assert SimplePolicy.filter(local_message) == {:ok, local_message}
end
end
defp build_media_message do
%{
"actor" => "https://remote.instance/users/bob",
"type" => "Create",
"object" => %{
"attachment" => [%{}],
"tag" => ["foo"],
"sensitive" => false
}
}
end
describe "when :report_removal" do
test "is empty" do
Config.put([:mrf_simple, :report_removal], [])
report_message = build_report_message()
local_message = build_local_message()
assert SimplePolicy.filter(report_message) == {:ok, report_message}
assert SimplePolicy.filter(local_message) == {:ok, local_message}
end
test "has a matching host" do
Config.put([:mrf_simple, :report_removal], ["remote.instance"])
report_message = build_report_message()
local_message = build_local_message()
assert SimplePolicy.filter(report_message) == {:reject, nil}
assert SimplePolicy.filter(local_message) == {:ok, local_message}
end
test "match with wildcard domain" do
Config.put([:mrf_simple, :report_removal], ["*.remote.instance"])
report_message = build_report_message()
local_message = build_local_message()
assert SimplePolicy.filter(report_message) == {:reject, nil}
assert SimplePolicy.filter(local_message) == {:ok, local_message}
end
end
defp build_report_message do
%{
"actor" => "https://remote.instance/users/bob",
"type" => "Flag"
}
end
describe "when :federated_timeline_removal" do
test "is empty" do
Config.put([:mrf_simple, :federated_timeline_removal], [])
{_, ftl_message} = build_ftl_actor_and_message()
local_message = build_local_message()
assert SimplePolicy.filter(ftl_message) == {:ok, ftl_message}
assert SimplePolicy.filter(local_message) == {:ok, local_message}
end
test "has a matching host" do
{actor, ftl_message} = build_ftl_actor_and_message()
ftl_message_actor_host =
ftl_message
|> Map.fetch!("actor")
|> URI.parse()
|> Map.fetch!(:host)
Config.put([:mrf_simple, :federated_timeline_removal], [ftl_message_actor_host])
local_message = build_local_message()
assert {:ok, ftl_message} = SimplePolicy.filter(ftl_message)
assert actor.follower_address in ftl_message["to"]
refute actor.follower_address in ftl_message["cc"]
refute "https://www.w3.org/ns/activitystreams#Public" in ftl_message["to"]
assert "https://www.w3.org/ns/activitystreams#Public" in ftl_message["cc"]
assert SimplePolicy.filter(local_message) == {:ok, local_message}
end
test "match with wildcard domain" do
{actor, ftl_message} = build_ftl_actor_and_message()
ftl_message_actor_host =
ftl_message
|> Map.fetch!("actor")
|> URI.parse()
|> Map.fetch!(:host)
Config.put([:mrf_simple, :federated_timeline_removal], ["*." <> ftl_message_actor_host])
local_message = build_local_message()
assert {:ok, ftl_message} = SimplePolicy.filter(ftl_message)
assert actor.follower_address in ftl_message["to"]
refute actor.follower_address in ftl_message["cc"]
refute "https://www.w3.org/ns/activitystreams#Public" in ftl_message["to"]
assert "https://www.w3.org/ns/activitystreams#Public" in ftl_message["cc"]
assert SimplePolicy.filter(local_message) == {:ok, local_message}
end
test "has a matching host but only as:Public in to" do
{_actor, ftl_message} = build_ftl_actor_and_message()
ftl_message_actor_host =
ftl_message
|> Map.fetch!("actor")
|> URI.parse()
|> Map.fetch!(:host)
ftl_message = Map.put(ftl_message, "cc", [])
Config.put([:mrf_simple, :federated_timeline_removal], [ftl_message_actor_host])
assert {:ok, ftl_message} = SimplePolicy.filter(ftl_message)
refute "https://www.w3.org/ns/activitystreams#Public" in ftl_message["to"]
assert "https://www.w3.org/ns/activitystreams#Public" in ftl_message["cc"]
end
end
defp build_ftl_actor_and_message do
actor = insert(:user)
{actor,
%{
"actor" => actor.ap_id,
"to" => ["https://www.w3.org/ns/activitystreams#Public", "http://foo.bar/baz"],
"cc" => [actor.follower_address, "http://foo.bar/qux"]
}}
end
describe "when :reject" do
test "is empty" do
Config.put([:mrf_simple, :reject], [])
remote_message = build_remote_message()
assert SimplePolicy.filter(remote_message) == {:ok, remote_message}
end
test "activity has a matching host" do
Config.put([:mrf_simple, :reject], ["remote.instance"])
remote_message = build_remote_message()
assert SimplePolicy.filter(remote_message) == {:reject, nil}
end
test "activity matches with wildcard domain" do
Config.put([:mrf_simple, :reject], ["*.remote.instance"])
remote_message = build_remote_message()
assert SimplePolicy.filter(remote_message) == {:reject, nil}
end
test "actor has a matching host" do
Config.put([:mrf_simple, :reject], ["remote.instance"])
remote_user = build_remote_user()
assert SimplePolicy.filter(remote_user) == {:reject, nil}
end
+
+ test "always accept deletions" do
+ Config.put([:mrf_simple, :reject], ["remote.instance"])
+
+ deletion_message = build_remote_deletion_message()
+
+ assert SimplePolicy.filter(deletion_message) == {:ok, deletion_message}
+ end
end
describe "when :accept" do
test "is empty" do
Config.put([:mrf_simple, :accept], [])
local_message = build_local_message()
remote_message = build_remote_message()
assert SimplePolicy.filter(local_message) == {:ok, local_message}
assert SimplePolicy.filter(remote_message) == {:ok, remote_message}
end
test "is not empty but activity doesn't have a matching host" do
Config.put([:mrf_simple, :accept], ["non.matching.remote"])
local_message = build_local_message()
remote_message = build_remote_message()
assert SimplePolicy.filter(local_message) == {:ok, local_message}
assert SimplePolicy.filter(remote_message) == {:reject, nil}
end
test "activity has a matching host" do
Config.put([:mrf_simple, :accept], ["remote.instance"])
local_message = build_local_message()
remote_message = build_remote_message()
assert SimplePolicy.filter(local_message) == {:ok, local_message}
assert SimplePolicy.filter(remote_message) == {:ok, remote_message}
end
test "activity matches with wildcard domain" do
Config.put([:mrf_simple, :accept], ["*.remote.instance"])
local_message = build_local_message()
remote_message = build_remote_message()
assert SimplePolicy.filter(local_message) == {:ok, local_message}
assert SimplePolicy.filter(remote_message) == {:ok, remote_message}
end
test "actor has a matching host" do
Config.put([:mrf_simple, :accept], ["remote.instance"])
remote_user = build_remote_user()
assert SimplePolicy.filter(remote_user) == {:ok, remote_user}
end
+
+ test "always accept deletions" do
+ Config.put([:mrf_simple, :accept], ["non.matching.remote"])
+
+ deletion_message = build_remote_deletion_message()
+
+ assert SimplePolicy.filter(deletion_message) == {:ok, deletion_message}
+ end
end
describe "when :avatar_removal" do
test "is empty" do
Config.put([:mrf_simple, :avatar_removal], [])
remote_user = build_remote_user()
assert SimplePolicy.filter(remote_user) == {:ok, remote_user}
end
test "is not empty but it doesn't have a matching host" do
Config.put([:mrf_simple, :avatar_removal], ["non.matching.remote"])
remote_user = build_remote_user()
assert SimplePolicy.filter(remote_user) == {:ok, remote_user}
end
test "has a matching host" do
Config.put([:mrf_simple, :avatar_removal], ["remote.instance"])
remote_user = build_remote_user()
{:ok, filtered} = SimplePolicy.filter(remote_user)
refute filtered["icon"]
end
test "match with wildcard domain" do
Config.put([:mrf_simple, :avatar_removal], ["*.remote.instance"])
remote_user = build_remote_user()
{:ok, filtered} = SimplePolicy.filter(remote_user)
refute filtered["icon"]
end
end
describe "when :banner_removal" do
test "is empty" do
Config.put([:mrf_simple, :banner_removal], [])
remote_user = build_remote_user()
assert SimplePolicy.filter(remote_user) == {:ok, remote_user}
end
test "is not empty but it doesn't have a matching host" do
Config.put([:mrf_simple, :banner_removal], ["non.matching.remote"])
remote_user = build_remote_user()
assert SimplePolicy.filter(remote_user) == {:ok, remote_user}
end
test "has a matching host" do
Config.put([:mrf_simple, :banner_removal], ["remote.instance"])
remote_user = build_remote_user()
{:ok, filtered} = SimplePolicy.filter(remote_user)
refute filtered["image"]
end
test "match with wildcard domain" do
Config.put([:mrf_simple, :banner_removal], ["*.remote.instance"])
remote_user = build_remote_user()
{:ok, filtered} = SimplePolicy.filter(remote_user)
refute filtered["image"]
end
end
defp build_local_message do
%{
"actor" => "#{Pleroma.Web.base_url()}/users/alice",
"to" => [],
"cc" => []
}
end
defp build_remote_message do
%{"actor" => "https://remote.instance/users/bob"}
end
defp build_remote_user do
%{
"id" => "https://remote.instance/users/bob",
"icon" => %{
"url" => "http://example.com/image.jpg",
"type" => "Image"
},
"image" => %{
"url" => "http://example.com/image.jpg",
"type" => "Image"
},
"type" => "Person"
}
end
+
+ defp build_remote_deletion_message do
+ %{
+ "type" => "Delete",
+ "actor" => "https://remote.instance/users/bob"
+ }
+ end
end

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