X-Git-Url: https://git.squeep.com/?a=blobdiff_plain;f=lib%2Fpleroma%2Fweb%2Factivity_pub%2Fmrf%2Fsimple_policy.ex;h=16117772717091489ae3c7b5fa0b76e651bad7ab;hb=3a0f99ed35a84145e713d4c640c50dc82c1b0dbb;hp=12fc3b18198029c596768c26c1df19d1cfc5a3f4;hpb=6786ad3d983a37728654fccfa525498c77683cdc;p=akkoma

diff --git a/lib/pleroma/web/activity_pub/mrf/simple_policy.ex b/lib/pleroma/web/activity_pub/mrf/simple_policy.ex
index 12fc3b181..161177727 100644
--- a/lib/pleroma/web/activity_pub/mrf/simple_policy.ex
+++ b/lib/pleroma/web/activity_pub/mrf/simple_policy.ex
@@ -1,21 +1,38 @@
+# 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}
-      actor_host == Pleroma.Config.get([Pleroma.Web.Endpoint, :url, :host]) -> {: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
@@ -26,8 +43,12 @@ defmodule Pleroma.Web.ActivityPub.MRF.SimplePolicy do
          %{"type" => "Create", "object" => %{"attachment" => child_attachment}} = object
        )
        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
@@ -43,14 +64,18 @@ defmodule Pleroma.Web.ActivityPub.MRF.SimplePolicy do
          %{host: actor_host} = _actor_info,
          %{
            "type" => "Create",
-           "object" => %{"attachment" => child_attachment} = child_object
+           "object" => child_object
          } = object
        )
-       when length(child_attachment) > 0 do
+       when is_map(child_object) 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
@@ -63,22 +88,17 @@ defmodule Pleroma.Web.ActivityPub.MRF.SimplePolicy do
   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
-             ),
+      with true <- MRF.subdomain_match?(timeline_removal, actor_host),
            user <- User.get_cached_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]
+           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) ++
-            ["https://www.w3.org/ns/activitystreams#Public"]
+        cc = List.delete(object["cc"], user.follower_address) ++ [Pleroma.Constants.as_public()]
 
         object
         |> Map.put("to", to)
@@ -90,18 +110,138 @@ defmodule Pleroma.Web.ActivityPub.MRF.SimplePolicy do
     {: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
+      {: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
-      _e -> {:reject, nil}
+      {: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