X-Git-Url: http://git.squeep.com/?a=blobdiff_plain;f=lib%2Fpleroma%2Fplugs%2Foauth_scopes_plug.ex;h=3201fb399820cf2f43158f020b9b8f3d52794dad;hb=f3a1f9c3bbb7321876a09b3846b5e10ecf4af94f;hp=f2bfa2b1a7c9e3699fb6c97d841783ffce5b0d81;hpb=5a4e2905fecfd21cf92f6b2844f15f5ee84b33f5;p=akkoma

diff --git a/lib/pleroma/plugs/oauth_scopes_plug.ex b/lib/pleroma/plugs/oauth_scopes_plug.ex
index f2bfa2b1a..b1a736d78 100644
--- a/lib/pleroma/plugs/oauth_scopes_plug.ex
+++ b/lib/pleroma/plugs/oauth_scopes_plug.ex
@@ -1,41 +1,77 @@
 # Pleroma: A lightweight social networking server
-# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Plugs.OAuthScopesPlug do
   import Plug.Conn
+  import Pleroma.Web.Gettext
 
-  @behaviour Plug
+  alias Pleroma.Config
+
+  use Pleroma.Web, :plug
 
   def init(%{scopes: _} = options), do: options
 
-  def call(%Plug.Conn{assigns: assigns} = conn, %{scopes: scopes} = options) do
+  @impl true
+  def perform(%Plug.Conn{assigns: assigns} = conn, %{scopes: scopes} = options) do
     op = options[:op] || :|
     token = assigns[:token]
 
-    cond do
-      is_nil(token) ->
-        conn
+    scopes = transform_scopes(scopes, options)
+    matched_scopes = (token && filter_descendants(scopes, token.scopes)) || []
 
-      op == :| && scopes -- token.scopes != scopes ->
+    cond do
+      token && op == :| && Enum.any?(matched_scopes) ->
         conn
 
-      op == :& && scopes -- token.scopes == [] ->
+      token && op == :& && matched_scopes == scopes ->
         conn
 
       options[:fallback] == :proceed_unauthenticated ->
-        conn
-        |> assign(:user, nil)
-        |> assign(:token, nil)
+        drop_auth_info(conn)
 
       true ->
-        missing_scopes = scopes -- token.scopes
-        error_message = "Insufficient permissions: #{Enum.join(missing_scopes, " #{op} ")}."
+        missing_scopes = scopes -- matched_scopes
+        permissions = Enum.join(missing_scopes, " #{op} ")
+
+        error_message =
+          dgettext("errors", "Insufficient permissions: %{permissions}.", permissions: permissions)
 
         conn
         |> put_resp_content_type("application/json")
-        |> send_resp(403, Jason.encode!(%{error: error_message}))
+        |> send_resp(:forbidden, Jason.encode!(%{error: error_message}))
         |> halt()
     end
   end
+
+  @doc "Drops authentication info from connection"
+  def drop_auth_info(conn) do
+    # To simplify debugging, setting a private variable on `conn` if auth info is dropped
+    conn
+    |> put_private(:authentication_ignored, true)
+    |> assign(:user, nil)
+    |> assign(:token, nil)
+  end
+
+  @doc "Keeps those of `scopes` which are descendants of `supported_scopes`"
+  def filter_descendants(scopes, supported_scopes) do
+    Enum.filter(
+      scopes,
+      fn scope ->
+        Enum.find(
+          supported_scopes,
+          &(scope == &1 || String.starts_with?(scope, &1 <> ":"))
+        )
+      end
+    )
+  end
+
+  @doc "Transforms scopes by applying supported options (e.g. :admin)"
+  def transform_scopes(scopes, options) do
+    if options[:admin] do
+      Config.oauth_admin_scopes(scopes)
+    else
+      scopes
+    end
+  end
 end