Merge branch 'develop' into issue/1411

[akkoma] / lib / pleroma / web / oauth / scopes.ex

diff --git a/lib/pleroma/web/oauth/scopes.ex b/lib/pleroma/web/oauth/scopes.ex
index ad9dfb2601b8fcee878247ef37bf58318ff4191d..5e04652c2ae554667fff4376039e654be723ecb4 100644 (file)
--- a/lib/pleroma/web/oauth/scopes.ex
+++ b/lib/pleroma/web/oauth/scopes.ex
@@ -7,8 +7,11 @@ defmodule Pleroma.Web.OAuth.Scopes do
   Functions for dealing with scopes.
   """
 
+  alias Pleroma.Plugs.OAuthScopesPlug
+  alias Pleroma.User
+
   @doc """
-  Fetch scopes from requiest params.
+  Fetch scopes from request params.
 
   Note: `scopes` is used by Mastodon — supporting it but sticking to
   OAuth's standard `scope` wherever we control it
@@ -53,15 +56,36 @@ defmodule Pleroma.Web.OAuth.Scopes do
   @doc """
   Validates scopes.
   """
-  @spec validates(list() | nil, list()) ::
+  @spec validate(list() | nil, list(), User.t()) ::
           {:ok, list()} | {:error, :missing_scopes | :unsupported_scopes}
-  def validates([], _app_scopes), do: {:error, :missing_scopes}
-  def validates(nil, _app_scopes), do: {:error, :missing_scopes}
+  def validate(blank_scopes, _app_scopes, _user) when blank_scopes in [nil, []],
+    do: {:error, :missing_scopes}
 
-  def validates(scopes, app_scopes) do
-    case scopes -- app_scopes do
-      [] -> {:ok, scopes}
+  def validate(scopes, app_scopes, %User{} = user) do
+    with {:ok, _} <- ensure_scopes_support(scopes, app_scopes),
+         {:ok, scopes} <- authorize_admin_scopes(scopes, app_scopes, user) do
+      {:ok, scopes}
+    end
+  end
+
+  defp ensure_scopes_support(scopes, app_scopes) do
+    case OAuthScopesPlug.filter_descendants(scopes, app_scopes) do
+      ^scopes -> {:ok, scopes}
       _ -> {:error, :unsupported_scopes}
     end
   end
+
+  defp authorize_admin_scopes(scopes, app_scopes, %User{} = user) do
+    if user.is_admin || !contains_admin_scopes?(scopes) || !contains_admin_scopes?(app_scopes) do
+      {:ok, scopes}
+    else
+      {:error, :unsupported_scopes}
+    end
+  end
+
+  def contains_admin_scopes?(scopes) do
+    scopes
+    |> OAuthScopesPlug.filter_descendants(["admin"])
+    |> Enum.any?()
+  end
 end