1 # Pleroma: A lightweight social networking server
2 # Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
3 # SPDX-License-Identifier: AGPL-3.0-only
5 defmodule Pleroma.Plugs.OAuthScopesPlug do
7 import Pleroma.Web.Gettext
10 alias Pleroma.Plugs.EnsurePublicOrAuthenticatedPlug
14 def init(%{scopes: _} = options), do: options
16 def call(%Plug.Conn{assigns: assigns} = conn, %{scopes: scopes} = options) do
17 op = options[:op] || :|
18 token = assigns[:token]
20 scopes = transform_scopes(scopes, options)
21 matched_scopes = (token && filter_descendants(scopes, token.scopes)) || []
24 token && op == :| && Enum.any?(matched_scopes) ->
27 token && op == :& && matched_scopes == scopes ->
30 options[:fallback] == :proceed_unauthenticated ->
33 |> assign(:token, nil)
34 |> maybe_perform_instance_privacy_check(options)
37 missing_scopes = scopes -- matched_scopes
38 permissions = Enum.join(missing_scopes, " #{op} ")
41 dgettext("errors", "Insufficient permissions: %{permissions}.", permissions: permissions)
44 |> put_resp_content_type("application/json")
45 |> send_resp(:forbidden, Jason.encode!(%{error: error_message}))
50 @doc "Filters descendants of supported scopes"
51 def filter_descendants(scopes, supported_scopes) do
57 &(scope == &1 || String.starts_with?(scope, &1 <> ":"))
63 @doc "Transforms scopes by applying supported options (e.g. :admin)"
64 def transform_scopes(scopes, options) do
66 Config.oauth_admin_scopes(scopes)
72 defp maybe_perform_instance_privacy_check(%Plug.Conn{} = conn, options) do
73 if options[:skip_instance_privacy_check] do
76 EnsurePublicOrAuthenticatedPlug.call(conn, [])