Bug: 145836245

Clone this repo:


  1. 3dc27a1 Use compiler option to choose the signing key. by ichihlu · 4 weeks ago master
  2. af75ee2 Adopt changes in secure_fb interface. by Janis Danisevskis · 3 months ago
  3. 1fe5459 Update configuration for emulator by ichihlu · 5 weeks ago
  4. 7434737 Slightly change the layout to make it work on more different devices. by Janis Danisevskis · 3 months ago
  5. f51c3b9 Separate device parameters from the layout. by Janis Danisevskis · 9 months ago

ConfirmationUI Trusted App

This is an implementation of the ConfirmationUI trusted application for Trusty. It is meant as a reference implementation for OEMs who want to implement ConfirmationUI or “Android Protected Confirmation” and use Trusty as TEE OS.


  • Android platform/system/teeui
  • libcxx
  • freetype

Additional integration work

You will need a touch controller driver or another trusted input method for the targeted platform.

Included in this package is a sample layout as used by Pixel3(+) phones. For phones that use button on the right side of the phone this layout can be adjusted by configuring the context parameters. E.g.: (see TrustyConfirmationUI.cpp) conv.setParam(1440_px); conv.setParam(2960_px); conv.setParam(34.146_mm); conv.setParam(44.146_mm); conv.setParam(54.146_mm); conv.setParam(64.146_mm);


A default example layout is provided in examples/layouts/. To override the layout with a vendor specific one, define CONFIRMATIONUI_LAYOUTS to point to the layouts library you want to link against.