tree e8a8d28fe3b31056abb022bd46a6df5fb65e1cfa
parent 87670f362090b4790d85e1347be9849a7461c2a1
author Bernardo Rufino <brufino@google.com> 1571741622 +0100
committer android-build-team Robot <android-build-team-robot@google.com> 1576650205 +0000

RESTRICT AUTOMERGE
Make toasts non-clickable

Since enforcement was only on client-side, in Toast class, an app could
use reflection (or other means) to make the Toast clickable. This is a
security vulnerability since it allows tapjacking, that is, intercept touch
events and do stuff like steal PINs and passwords.

This CL brings the enforcement to the system by applying flag
FLAG_NOT_TOUCHABLE.

Test: atest CtsWindowManagerDeviceTestCases:ToastTest
Test: Construct app that uses reflection to remove flag FLAG_NOT_TOUCHABLE and
      log click events. Then:
      1) Observe click events are logged without this CL.
      2) Observer click events are not logged with this CL.
Bug: 128674520

Change-Id: Ic36585bc4f186e0224f5b687c49c0b3d9266838c
(cherry picked from commit b81f269ae2afb446b9d4a909fc2bcf038af00c41)