diff options
Diffstat (limited to 'lib')
6 files changed, 254 insertions, 6 deletions
diff --git a/lib/pleroma/web/activity_pub/activity_pub.ex b/lib/pleroma/web/activity_pub/activity_pub.ex index 643877268..5bb0fba6e 100644 --- a/lib/pleroma/web/activity_pub/activity_pub.ex +++ b/lib/pleroma/web/activity_pub/activity_pub.ex @@ -979,8 +979,9 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do defp restrict_replies(query, %{exclude_replies: true}) do from( - [_activity, object] in query, - where: fragment("?->>'inReplyTo' is null", object.data) + [activity, object] in query, + where: + fragment("?->>'inReplyTo' is null or ?->>'type' = 'Announce'", object.data, activity.data) ) end diff --git a/lib/pleroma/web/activity_pub/mrf/anti_mention_spam_policy.ex b/lib/pleroma/web/activity_pub/mrf/anti_mention_spam_policy.ex new file mode 100644 index 000000000..531e75ce8 --- /dev/null +++ b/lib/pleroma/web/activity_pub/mrf/anti_mention_spam_policy.ex @@ -0,0 +1,87 @@ +# Pleroma: A lightweight social networking server +# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/> +# SPDX-License-Identifier: AGPL-3.0-only + +defmodule Pleroma.Web.ActivityPub.MRF.AntiMentionSpamPolicy do + alias Pleroma.Config + alias Pleroma.User + require Pleroma.Constants + + @behaviour Pleroma.Web.ActivityPub.MRF.Policy + + defp user_has_posted?(%User{} = u), do: u.note_count > 0 + + defp user_has_age?(%User{} = u) do + user_age_limit = Config.get([:mrf_antimentionspam, :user_age_limit], 30_000) + diff = NaiveDateTime.utc_now() |> NaiveDateTime.diff(u.inserted_at, :millisecond) + diff >= user_age_limit + end + + defp good_reputation?(%User{} = u) do + user_has_age?(u) and user_has_posted?(u) + end + + # copied from HellthreadPolicy + defp get_recipient_count(message) do + recipients = (message["to"] || []) ++ (message["cc"] || []) + + follower_collection = + User.get_cached_by_ap_id(message["actor"] || message["attributedTo"]).follower_address + + if Enum.member?(recipients, Pleroma.Constants.as_public()) do + recipients = + recipients + |> List.delete(Pleroma.Constants.as_public()) + |> List.delete(follower_collection) + + {:public, length(recipients)} + else + recipients = + recipients + |> List.delete(follower_collection) + + {:not_public, length(recipients)} + end + end + + defp object_has_recipients?(%{"object" => object} = activity) do + {_, object_count} = get_recipient_count(object) + {_, activity_count} = get_recipient_count(activity) + object_count + activity_count > 0 + end + + defp object_has_recipients?(object) do + {_, count} = get_recipient_count(object) + count > 0 + end + + @impl true + def filter(%{"type" => "Create", "actor" => actor} = activity) do + with {:ok, %User{local: false} = u} <- User.get_or_fetch_by_ap_id(actor), + {:has_mentions, true} <- {:has_mentions, object_has_recipients?(activity)}, + {:good_reputation, true} <- {:good_reputation, good_reputation?(u)} do + {:ok, activity} + else + {:ok, %User{local: true}} -> + {:ok, activity} + + {:has_mentions, false} -> + {:ok, activity} + + {:good_reputation, false} -> + {:reject, "[AntiMentionSpamPolicy] User rejected"} + + {:error, _} -> + {:reject, "[AntiMentionSpamPolicy] Failed to get or fetch user by ap_id"} + + e -> + {:reject, "[AntiMentionSpamPolicy] Unhandled error #{inspect(e)}"} + end + end + + # in all other cases, pass through + def filter(message), do: {:ok, message} + + @impl true + def describe, do: {:ok, %{}} +end diff --git a/lib/pleroma/web/activity_pub/mrf/dnsrbl_policy.ex b/lib/pleroma/web/activity_pub/mrf/dnsrbl_policy.ex new file mode 100644 index 000000000..9543cc545 --- /dev/null +++ b/lib/pleroma/web/activity_pub/mrf/dnsrbl_policy.ex @@ -0,0 +1,142 @@ +# Pleroma: A lightweight social networking server +# Copyright © 2017-2024 Pleroma Authors <https://pleroma.social/> +# SPDX-License-Identifier: AGPL-3.0-only + +defmodule Pleroma.Web.ActivityPub.MRF.DNSRBLPolicy do + @moduledoc """ + Dynamic activity filtering based on an RBL database + + This MRF makes queries to a custom DNS server which will + respond with values indicating the classification of the domain + the activity originated from. This method has been widely used + in the email anti-spam industry for very fast reputation checks. + + e.g., if the DNS response is 127.0.0.1 or empty, the domain is OK + Other values such as 127.0.0.2 may be used for specific classifications. + + Information for why the host is blocked can be stored in a corresponding TXT record. + + This method is fail-open so if the queries fail the activites are accepted. + + An example of software meant for this purpsoe is rbldnsd which can be found + at http://www.corpit.ru/mjt/rbldnsd.html or mirrored at + https://git.pleroma.social/feld/rbldnsd + + It is highly recommended that you run your own copy of rbldnsd and use an + external mechanism to sync/share the contents of the zone file. This is + important to keep the latency on the queries as low as possible and prevent + your DNS server from being attacked so it fails and content is permitted. + """ + + @behaviour Pleroma.Web.ActivityPub.MRF.Policy + + alias Pleroma.Config + + require Logger + + @query_retries 1 + @query_timeout 500 + + @impl true + def filter(%{"actor" => actor} = object) do + actor_info = URI.parse(actor) + + with {:ok, object} <- check_rbl(actor_info, object) do + {:ok, object} + else + _ -> {:reject, "[DNSRBLPolicy]"} + end + end + + @impl true + def filter(object), do: {:ok, object} + + @impl true + def describe do + mrf_dnsrbl = + Config.get(:mrf_dnsrbl) + |> Enum.into(%{}) + + {:ok, %{mrf_dnsrbl: mrf_dnsrbl}} + end + + @impl true + def config_description do + %{ + key: :mrf_dnsrbl, + related_policy: "Pleroma.Web.ActivityPub.MRF.DNSRBLPolicy", + label: "MRF DNSRBL", + description: "DNS RealTime Blackhole Policy", + children: [ + %{ + key: :nameserver, + type: {:string}, + description: "DNSRBL Nameserver to Query (IP or hostame)", + suggestions: ["127.0.0.1"] + }, + %{ + key: :port, + type: {:string}, + description: "Nameserver port", + suggestions: ["53"] + }, + %{ + key: :zone, + type: {:string}, + description: "Root zone for querying", + suggestions: ["bl.pleroma.com"] + } + ] + } + end + + defp check_rbl(%{host: actor_host}, object) do + with false <- match?(^actor_host, Pleroma.Web.Endpoint.host()), + zone when not is_nil(zone) <- Keyword.get(Config.get([:mrf_dnsrbl]), :zone) do + query = + Enum.join([actor_host, zone], ".") + |> String.to_charlist() + + rbl_response = rblquery(query) + + if Enum.empty?(rbl_response) do + {:ok, object} + else + Task.start(fn -> + reason = rblquery(query, :txt) || "undefined" + + Logger.warning( + "DNSRBL Rejected activity from #{actor_host} for reason: #{inspect(reason)}" + ) + end) + + :error + end + else + _ -> {:ok, object} + end + end + + defp get_rblhost_ip(rblhost) do + case rblhost |> String.to_charlist() |> :inet_parse.address() do + {:ok, _} -> rblhost |> String.to_charlist() |> :inet_parse.address() + _ -> {:ok, rblhost |> String.to_charlist() |> :inet_res.lookup(:in, :a) |> Enum.random()} + end + end + + defp rblquery(query, type \\ :a) do + config = Config.get([:mrf_dnsrbl]) + + case get_rblhost_ip(config[:nameserver]) do + {:ok, rblnsip} -> + :inet_res.lookup(query, :in, type, + nameservers: [{rblnsip, config[:port]}], + timeout: @query_timeout, + retry: @query_retries + ) + + _ -> + [] + end + end +end diff --git a/lib/pleroma/web/activity_pub/object_validators/attachment_validator.ex b/lib/pleroma/web/activity_pub/object_validators/attachment_validator.ex index 72975f348..5ee9e7549 100644 --- a/lib/pleroma/web/activity_pub/object_validators/attachment_validator.ex +++ b/lib/pleroma/web/activity_pub/object_validators/attachment_validator.ex @@ -15,6 +15,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.AttachmentValidator do field(:type, :string, default: "Link") field(:mediaType, ObjectValidators.MIME, default: "application/octet-stream") field(:name, :string) + field(:summary, :string) field(:blurhash, :string) embeds_many :url, UrlObjectValidator, primary_key: false do @@ -44,7 +45,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.AttachmentValidator do |> fix_url() struct - |> cast(data, [:id, :type, :mediaType, :name, :blurhash]) + |> cast(data, [:id, :type, :mediaType, :name, :summary, :blurhash]) |> cast_embed(:url, with: &url_changeset/2, required: true) |> validate_inclusion(:type, ~w[Link Document Audio Image Video]) |> validate_required([:type, :mediaType]) diff --git a/lib/pleroma/web/api_spec/schemas/attachment.ex b/lib/pleroma/web/api_spec/schemas/attachment.ex index 2871b5f99..4104ed25c 100644 --- a/lib/pleroma/web/api_spec/schemas/attachment.ex +++ b/lib/pleroma/web/api_spec/schemas/attachment.ex @@ -50,7 +50,11 @@ defmodule Pleroma.Web.ApiSpec.Schemas.Attachment do pleroma: %Schema{ type: :object, properties: %{ - mime_type: %Schema{type: :string, description: "mime type of the attachment"} + mime_type: %Schema{type: :string, description: "mime type of the attachment"}, + name: %Schema{ + type: :string, + description: "Name of the attachment, typically the filename" + } } } }, diff --git a/lib/pleroma/web/mastodon_api/views/status_view.ex b/lib/pleroma/web/mastodon_api/views/status_view.ex index c945290c1..0c16749a4 100644 --- a/lib/pleroma/web/mastodon_api/views/status_view.ex +++ b/lib/pleroma/web/mastodon_api/views/status_view.ex @@ -624,6 +624,19 @@ defmodule Pleroma.Web.MastodonAPI.StatusView do to_string(attachment["id"] || hash_id) end + description = + if attachment["summary"] do + HTML.strip_tags(attachment["summary"]) + else + attachment["name"] + end + + name = if attachment["summary"], do: attachment["name"] + + pleroma = + %{mime_type: media_type} + |> Maps.put_if_present(:name, name) + %{ id: attachment_id, url: href, @@ -631,8 +644,8 @@ defmodule Pleroma.Web.MastodonAPI.StatusView do preview_url: href_preview, text_url: href, type: type, - description: attachment["name"], - pleroma: %{mime_type: media_type}, + description: description, + pleroma: pleroma, blurhash: attachment["blurhash"] } |> Maps.put_if_present(:meta, meta) |