[#1478] OAuth admin tweaks: enforced OAuth admin scopes usage by default, migrated existing OAuth records. Adjusted tests.

4 files changed, 16 insertions, 42 deletions

diff --git a/lib/pleroma/plugs/user_is_admin_plug.ex b/lib/pleroma/plugs/user_is_admin_plug.ex
index 582fb1f92..3190163d3 100644
--- a/lib/pleroma/plugs/user_is_admin_plug.ex
+++ b/lib/pleroma/plugs/user_is_admin_plug.ex
@@ -23,6 +23,7 @@ defmodule Pleroma.Plugs.UserIsAdminPlug do
       token && OAuth.Scopes.contains_admin_scopes?(token.scopes) ->
         # Note: checking for _any_ admin scope presence, not necessarily fitting requested action.
         #   Thus, controller must explicitly invoke OAuthScopesPlug to verify scope requirements.
+        #   Admin might opt out of admin scope for some apps to block any admin actions from them.
         conn
 
       true ->
diff --git a/lib/pleroma/user.ex b/lib/pleroma/user.ex
index 706aee2ff..40cc93e03 100644
--- a/lib/pleroma/user.ex
+++ b/lib/pleroma/user.ex
@@ -1847,22 +1847,13 @@ defmodule Pleroma.User do
   end
 
   def admin_api_update(user, params) do
-    changeset =
-      cast(user, params, [
-        :is_moderator,
-        :is_admin,
-        :show_role
-      ])
-
-    with {:ok, updated_user} <- update_and_set_cache(changeset) do
-      if user.is_admin && !updated_user.is_admin do
-        # Tokens & authorizations containing any admin scopes must be revoked (revoking all).
-        # This is an extra safety measure (tokens' admin scopes won't be accepted for non-admins).
-        global_sign_out(user)
-      end
-
-      {:ok, updated_user}
-    end
+    user
+    |> cast(params, [
+      :is_moderator,
+      :is_admin,
+      :show_role
+    ])
+    |> update_and_set_cache()
   end
 
   @doc "Signs user out of all applications"
diff --git a/lib/pleroma/web/oauth/oauth_controller.ex b/lib/pleroma/web/oauth/oauth_controller.ex
index 87acdec97..d31a3d91c 100644
--- a/lib/pleroma/web/oauth/oauth_controller.ex
+++ b/lib/pleroma/web/oauth/oauth_controller.ex
@@ -222,7 +222,7 @@ defmodule Pleroma.Web.OAuth.OAuthController do
          {:user_active, true} <- {:user_active, !user.deactivated},
          {:password_reset_pending, false} <-
            {:password_reset_pending, user.password_reset_pending},
-         {:ok, scopes} <- validate_scopes(app, params, user),
+         {:ok, scopes} <- validate_scopes(app, params),
          {:ok, auth} <- Authorization.create_authorization(app, user, scopes),
          {:ok, token} <- Token.exchange_token(app, auth) do
       json(conn, Token.Response.build(user, token))
@@ -471,7 +471,7 @@ defmodule Pleroma.Web.OAuth.OAuthController do
            {:get_user, (user && {:ok, user}) || Authenticator.get_user(conn)},
          %App{} = app <- Repo.get_by(App, client_id: client_id),
          true <- redirect_uri in String.split(app.redirect_uris),
-         {:ok, scopes} <- validate_scopes(app, auth_attrs, user),
+         {:ok, scopes} <- validate_scopes(app, auth_attrs),
          {:auth_active, true} <- {:auth_active, User.auth_active?(user)} do
       Authorization.create_authorization(app, user, scopes)
     end
@@ -487,12 +487,12 @@ defmodule Pleroma.Web.OAuth.OAuthController do
   defp put_session_registration_id(%Plug.Conn{} = conn, registration_id),
     do: put_session(conn, :registration_id, registration_id)
 
-  @spec validate_scopes(App.t(), map(), User.t()) ::
+  @spec validate_scopes(App.t(), map()) ::
           {:ok, list()} | {:error, :missing_scopes | :unsupported_scopes}
-  defp validate_scopes(%App{} = app, params, %User{} = user) do
+  defp validate_scopes(%App{} = app, params) do
     params
     |> Scopes.fetch_scopes(app.scopes)
-    |> Scopes.validate(app.scopes, user)
+    |> Scopes.validate(app.scopes)
   end
 
   def default_redirect_uri(%App{} = app) do
diff --git a/lib/pleroma/web/oauth/scopes.ex b/lib/pleroma/web/oauth/scopes.ex
index 00da225b9..151467494 100644
--- a/lib/pleroma/web/oauth/scopes.ex
+++ b/lib/pleroma/web/oauth/scopes.ex
@@ -8,7 +8,6 @@ defmodule Pleroma.Web.OAuth.Scopes do
   """
 
   alias Pleroma.Plugs.OAuthScopesPlug
-  alias Pleroma.User
 
   @doc """
   Fetch scopes from request params.
@@ -56,35 +55,18 @@ defmodule Pleroma.Web.OAuth.Scopes do
   @doc """
   Validates scopes.
   """
-  @spec validate(list() | nil, list(), User.t()) ::
+  @spec validate(list() | nil, list()) ::
           {:ok, list()} | {:error, :missing_scopes | :unsupported_scopes}
-  def validate(blank_scopes, _app_scopes, _user) when blank_scopes in [nil, []],
+  def validate(blank_scopes, _app_scopes) when blank_scopes in [nil, []],
     do: {:error, :missing_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
+  def validate(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
-      # Gracefully dropping admin scopes from requested scopes if user isn't an admin (not raising)
-      scopes = scopes -- OAuthScopesPlug.filter_descendants(scopes, ["admin"])
-      validate(scopes, app_scopes, user)
-    end
-  end
-
   def contains_admin_scopes?(scopes) do
     scopes
     |> OAuthScopesPlug.filter_descendants(["admin"])