Allowlist for platform signed package/sharedUid-s.

Fixes: 308573259
Test: atest android.content.pm.cts.PackageManagerTest
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:4f882ccfbf955b5fc9e04ef45ff3293885a7d20a)
Merged-In: Ieb9e256b5fbb3b2ccd5d6a695f63011a31e95d9b
Change-Id: Ieb9e256b5fbb3b2ccd5d6a695f63011a31e95d9b
24D1-dev is based on 24Q2-release. Therefore, we merged this CL to 24D1-dev.

3 files changed, 43 insertions, 0 deletions

diff --git a/data/etc/Android.bp b/data/etc/Android.bp
index 238a3e10f058..1410950966e9 100644
--- a/data/etc/Android.bp
+++ b/data/etc/Android.bp
@@ -72,6 +72,12 @@ prebuilt_etc {
     src: "enhanced-confirmation.xml",
 }
 
+prebuilt_etc {
+    name: "package-shareduid-allowlist.xml",
+    sub_dir: "sysconfig",
+    src: "package-shareduid-allowlist.xml",
+}
+
 // Privapp permission whitelist files
 
 prebuilt_etc {
diff --git a/data/etc/CleanSpec.mk b/data/etc/CleanSpec.mk
index 783a7edadeb7..fd38d2782cb2 100644
--- a/data/etc/CleanSpec.mk
+++ b/data/etc/CleanSpec.mk
@@ -43,6 +43,8 @@
 #$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/core_intermediates)
 #$(call add-clean-step, find $(OUT_DIR) -type f -name "IGTalkSession*" -print0 | xargs -0 rm -f)
 #$(call add-clean-step, rm -rf $(PRODUCT_OUT)/data/*)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/product/etc/sysconfig/package-shareduid-allowlist.xml)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/product/etc/sysconfig/package-shareduid-allowlist.xml)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/product/etc/permissions/com.android.carrierconfig.xml)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/product/etc/permissions/com.android.carrierconfig.xml)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/product/etc/permissions/com.android.emergency.xml)
diff --git a/data/etc/package-shareduid-allowlist.xml b/data/etc/package-shareduid-allowlist.xml
new file mode 100644
index 000000000000..2401d4a26e68
--- /dev/null
+++ b/data/etc/package-shareduid-allowlist.xml
@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2024 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+ -->
+
+<!--
+This XML defines an allowlist for packages that want to join a particular shared-uid.
+If a non-system package that is signed with platform signature, is trying to join a particular
+shared-uid, and not in this list, the installation will fail.
+
+- The "package" XML attribute refers to the app's package name.
+- The "shareduid" XML attribute refers to the shared uid name.
+
+Example usage
+    1. <allow-package-shareduid package="com.example.app" shareduid="android.uid.system"/>
+        Indicates that a package - com.example.app, will be able to join android.uid.system.
+    2. <allow-package-shareduid package="oem.example.app" shareduid="oem.uid.custom"/>
+        Indicates that a package - oem.example.app, will be able to join oem.uid.custom.
+-->
+
+<config>
+    <allow-package-shareduid package="android.test.settings" shareduid="android.uid.system" />
+</config>