From d8e0b093e49c96ca4889024b0d4fe3d7c7c1c847 Mon Sep 17 00:00:00 2001
From: Michael Groover <mpgroover@google.com>
Date: Tue, 20 Dec 2022 17:28:00 -0600
Subject: [PATCH] Grant app visibility if launching app opts in to sharing
 identity

Android U introduced new APIs to allow a launching app to opt-in to
sharing its identity with a launched activity; this allows the
launched activity to perform authorization checks against the
launching app. This commit grants app visibility to allow the
launched activity to access the details and signing identity of
the launching app.

Bug: 262605364
Test: atest ShareIdentityTest
Change-Id: I2b4b2acbd127b01f231c4852704ba69e31c4aaed
---
 .../core/java/com/android/server/wm/ActivityStarter.java    | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/services/core/java/com/android/server/wm/ActivityStarter.java b/services/core/java/com/android/server/wm/ActivityStarter.java
index 6c49f47e68803..b3590218478d4 100644
--- a/services/core/java/com/android/server/wm/ActivityStarter.java
+++ b/services/core/java/com/android/server/wm/ActivityStarter.java
@@ -1661,6 +1661,12 @@ class ActivityStarter {
             pmInternal.grantImplicitAccess(mStartActivity.mUserId, mIntent,
                     UserHandle.getAppId(mStartActivity.info.applicationInfo.uid) /*recipient*/,
                     resultToUid /*visible*/, true /*direct*/);
+        } else if (mStartActivity.mShareIdentity) {
+            final PackageManagerInternal pmInternal =
+                    mService.getPackageManagerInternalLocked();
+            pmInternal.grantImplicitAccess(mStartActivity.mUserId, mIntent,
+                    UserHandle.getAppId(mStartActivity.info.applicationInfo.uid) /*recipient*/,
+                    r.launchedFromUid /*visible*/, true /*direct*/);
         }
         final Task startedTask = mStartActivity.getTask();
         if (newTask) {