From d46c1bffa91a7e8031121f8eafa8bf8b6750b573 Mon Sep 17 00:00:00 2001
From: Adithya R <gh0strider.2k18.reborn@gmail.com>
Date: Thu, 26 Jan 2023 14:39:32 +0530
Subject: [PATCH] [DNM] init: Spoof build type property to user

Also set release-keys and disable `ro.debuggable`. Avoids "root"
detection in some banking-related apps whilst having the convenience
of userdebug builds, such as adb root or permissive selinux.

Avoid this in eng build to keep necessary debugging intact.

Change-Id: I78ec5abe4db8083c0e02157c0bcd1a3d99fb9a5d
---
 init/Android.bp           | 1 +
 init/property_service.cpp | 6 ++++++
 2 files changed, 7 insertions(+)

diff --git a/init/Android.bp b/init/Android.bp
index dce50ea4b..c3c84164f 100644
--- a/init/Android.bp
+++ b/init/Android.bp
@@ -153,6 +153,7 @@ libinit_cc_defaults {
         },
         eng: {
             cppflags: [
+                "-DENG_BUILD",
                 "-USHUTDOWN_ZERO_TIMEOUT",
                 "-DSHUTDOWN_ZERO_TIMEOUT=1",
             ],
diff --git a/init/property_service.cpp b/init/property_service.cpp
index a1b56dd6e..89c914107 100644
--- a/init/property_service.cpp
+++ b/init/property_service.cpp
@@ -1366,6 +1366,12 @@ static void SetSafetyNetProps() {
     InitPropertySet("ro.boot.verifiedbootstate", "green");
     InitPropertySet("ro.boot.veritymode", "enforcing");
     InitPropertySet("ro.build.tags", "release-keys");
+
+#ifndef ENG_BUILD
+    // Spoof non-eng builds (such as userdebug) to user
+    InitPropertySet("ro.build.type", "user");
+    InitPropertySet("ro.debuggable", "0");
+#endif
 }
 
 void PropertyInit() {