diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/pleroma/http_signatures_api.ex | 4 | ||||
| -rw-r--r-- | lib/pleroma/signature.ex | 16 | ||||
| -rw-r--r-- | lib/pleroma/web/mastodon_api/views/instance_view.ex | 7 | ||||
| -rw-r--r-- | lib/pleroma/web/plugs/http_signature_plug.ex | 53 |
4 files changed, 73 insertions, 7 deletions
diff --git a/lib/pleroma/http_signatures_api.ex b/lib/pleroma/http_signatures_api.ex new file mode 100644 index 000000000..8e73dc98e --- /dev/null +++ b/lib/pleroma/http_signatures_api.ex @@ -0,0 +1,4 @@ +defmodule Pleroma.HTTPSignaturesAPI do + @callback validate_conn(conn :: Plug.Conn.t()) :: boolean + @callback signature_for_conn(conn :: Plug.Conn.t()) :: map +end diff --git a/lib/pleroma/signature.ex b/lib/pleroma/signature.ex index 8fd422a6e..900d40c4b 100644 --- a/lib/pleroma/signature.ex +++ b/lib/pleroma/signature.ex @@ -44,8 +44,7 @@ defmodule Pleroma.Signature do defp remove_suffix(uri, []), do: uri def fetch_public_key(conn) do - with %{"keyId" => kid} <- HTTPSignatures.signature_for_conn(conn), - {:ok, actor_id} <- key_id_to_actor_id(kid), + with {:ok, actor_id} <- get_actor_id(conn), {:ok, public_key} <- User.get_public_key_for_ap_id(actor_id) do {:ok, public_key} else @@ -55,8 +54,7 @@ defmodule Pleroma.Signature do end def refetch_public_key(conn) do - with %{"keyId" => kid} <- HTTPSignatures.signature_for_conn(conn), - {:ok, actor_id} <- key_id_to_actor_id(kid), + with {:ok, actor_id} <- get_actor_id(conn), {:ok, _user} <- ActivityPub.make_user_from_ap_id(actor_id), {:ok, public_key} <- User.get_public_key_for_ap_id(actor_id) do {:ok, public_key} @@ -66,6 +64,16 @@ defmodule Pleroma.Signature do end end + def get_actor_id(conn) do + with %{"keyId" => kid} <- HTTPSignatures.signature_for_conn(conn), + {:ok, actor_id} <- key_id_to_actor_id(kid) do + {:ok, actor_id} + else + e -> + {:error, e} + end + end + def sign(%User{keys: keys} = user, headers) do with {:ok, private_key, _} <- Keys.keys_from_pem(keys) do HTTPSignatures.sign(private_key, user.ap_id <> "#main-key", headers) diff --git a/lib/pleroma/web/mastodon_api/views/instance_view.ex b/lib/pleroma/web/mastodon_api/views/instance_view.ex index 99fc6d0c3..913684928 100644 --- a/lib/pleroma/web/mastodon_api/views/instance_view.ex +++ b/lib/pleroma/web/mastodon_api/views/instance_view.ex @@ -152,6 +152,7 @@ defmodule Pleroma.Web.MastodonAPI.InstanceView do def federation do quarantined = Config.get([:instance, :quarantined_instances], []) + rejected = Config.get([:instance, :rejected_instances], []) if Config.get([:mrf, :transparency]) do {:ok, data} = MRF.describe() @@ -171,6 +172,12 @@ defmodule Pleroma.Web.MastodonAPI.InstanceView do |> Enum.map(fn {instance, reason} -> {instance, %{"reason" => reason}} end) |> Map.new() }) + |> Map.put( + :rejected_instances, + rejected + |> Enum.map(fn {instance, reason} -> {instance, %{"reason" => reason}} end) + |> Map.new() + ) else %{} end diff --git a/lib/pleroma/web/plugs/http_signature_plug.ex b/lib/pleroma/web/plugs/http_signature_plug.ex index 7ec202662..6bf2dd432 100644 --- a/lib/pleroma/web/plugs/http_signature_plug.ex +++ b/lib/pleroma/web/plugs/http_signature_plug.ex @@ -7,8 +7,18 @@ defmodule Pleroma.Web.Plugs.HTTPSignaturePlug do import Plug.Conn import Phoenix.Controller, only: [get_format: 1, text: 2] + + alias Pleroma.Web.ActivityPub.MRF + require Logger + @config_impl Application.compile_env(:pleroma, [__MODULE__, :config_impl], Pleroma.Config) + @http_signatures_impl Application.compile_env( + :pleroma, + [__MODULE__, :http_signatures_impl], + HTTPSignatures + ) + def init(options) do options end @@ -21,7 +31,9 @@ defmodule Pleroma.Web.Plugs.HTTPSignaturePlug do if get_format(conn) in ["json", "activity+json"] do conn |> maybe_assign_valid_signature() + |> maybe_assign_actor_id() |> maybe_require_signature() + |> maybe_filter_requests() else conn end @@ -35,7 +47,7 @@ defmodule Pleroma.Web.Plugs.HTTPSignaturePlug do |> put_req_header("(request-target)", request_target) |> put_req_header("@request-target", request_target) - HTTPSignatures.validate_conn(conn) + @http_signatures_impl.validate_conn(conn) end defp validate_signature(conn) do @@ -85,6 +97,16 @@ defmodule Pleroma.Web.Plugs.HTTPSignaturePlug do end end + defp maybe_assign_actor_id(%{assigns: %{valid_signature: true}} = conn) do + adapter = Application.get_env(:http_signatures, :adapter) + + {:ok, actor_id} = adapter.get_actor_id(conn) + + assign(conn, :actor_id, actor_id) + end + + defp maybe_assign_actor_id(conn), do: conn + defp has_signature_header?(conn) do conn |> get_req_header("signature") |> Enum.at(0, false) end @@ -92,9 +114,9 @@ defmodule Pleroma.Web.Plugs.HTTPSignaturePlug do defp maybe_require_signature(%{assigns: %{valid_signature: true}} = conn), do: conn defp maybe_require_signature(%{remote_ip: remote_ip} = conn) do - if Pleroma.Config.get([:activitypub, :authorized_fetch_mode], false) do + if @config_impl.get([:activitypub, :authorized_fetch_mode], false) do exceptions = - Pleroma.Config.get([:activitypub, :authorized_fetch_mode_exceptions], []) + @config_impl.get([:activitypub, :authorized_fetch_mode_exceptions], []) |> Enum.map(&InetHelper.parse_cidr/1) if Enum.any?(exceptions, fn x -> InetCidr.contains?(x, remote_ip) end) do @@ -109,4 +131,29 @@ defmodule Pleroma.Web.Plugs.HTTPSignaturePlug do conn end end + + defp maybe_filter_requests(%{halted: true} = conn), do: conn + + defp maybe_filter_requests(conn) do + if @config_impl.get([:activitypub, :authorized_fetch_mode], false) and + conn.assigns[:actor_id] do + %{host: host} = URI.parse(conn.assigns.actor_id) + + if MRF.subdomain_match?(rejected_domains(), host) do + conn + |> put_status(:unauthorized) + |> halt() + else + conn + end + else + conn + end + end + + defp rejected_domains do + @config_impl.get([:instance, :rejected_instances]) + |> Pleroma.Web.ActivityPub.MRF.instance_list_from_tuples() + |> Pleroma.Web.ActivityPub.MRF.subdomains_regex() + end end |