Verify URI permission for channel sound update from NotificationListenerService

 Check that a privileged NotificationListenerService (CDM) has the permission to access the sound URI
  when updating a notification channel.

Test: atest com.android.server.notification.NotificationManagerServiceTest#testUpdateNotificationChannelFromPrivilegedListener_noSoundUriPermission
Bug: 317357401
(cherry picked from commit 9b7bbbf5ad542ecf9ecbf8cd819b468791b443c0)
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:f090c0538a27d8658d8a860046d5c5e931302341)
Merged-In: Ic7d2e96e43565e98d2aa29b8f2ba35c142387ba9
Change-Id: Ic7d2e96e43565e98d2aa29b8f2ba35c142387ba9

2 files changed, 89 insertions, 0 deletions

diff --git a/services/core/java/com/android/server/notification/NotificationManagerService.java b/services/core/java/com/android/server/notification/NotificationManagerService.java
index c4f8bac4e3cd..bcef4d2b6a44 100755
--- a/services/core/java/com/android/server/notification/NotificationManagerService.java
+++ b/services/core/java/com/android/server/notification/NotificationManagerService.java
@@ -5434,6 +5434,10 @@ public class NotificationManagerService extends SystemService {
             Objects.requireNonNull(user);
 
             verifyPrivilegedListener(token, user, false);
+
+            final NotificationChannel originalChannel = mPreferencesHelper.getNotificationChannel(
+                    pkg, getUidForPackageAndUser(pkg, user), channel.getId(), true);
+            verifyPrivilegedListenerUriPermission(Binder.getCallingUid(), channel, originalChannel);
             updateNotificationChannelInt(pkg, getUidForPackageAndUser(pkg, user), channel, true);
         }
 
@@ -5513,6 +5517,24 @@ public class NotificationManagerService extends SystemService {
             }
         }
 
+        private void verifyPrivilegedListenerUriPermission(int sourceUid,
+                @NonNull NotificationChannel updateChannel,
+                @Nullable NotificationChannel originalChannel) {
+            // Check that the NLS has the required permissions to access the channel
+            final Uri soundUri = updateChannel.getSound();
+            final Uri originalSoundUri =
+                    (originalChannel != null) ? originalChannel.getSound() : null;
+            if (soundUri != null && !Objects.equals(originalSoundUri, soundUri)) {
+                Binder.withCleanCallingIdentity(() -> {
+                    mUgmInternal.checkGrantUriPermission(sourceUid, null,
+                            ContentProvider.getUriWithoutUserId(soundUri),
+                            Intent.FLAG_GRANT_READ_URI_PERMISSION,
+                            ContentProvider.getUserIdFromUri(soundUri,
+                            UserHandle.getUserId(sourceUid)));
+                });
+            }
+        }
+
         private int getUidForPackageAndUser(String pkg, UserHandle user) throws RemoteException {
             int uid = INVALID_UID;
             final long identity = Binder.clearCallingIdentity();
diff --git a/services/tests/uiservicestests/src/com/android/server/notification/NotificationManagerServiceTest.java b/services/tests/uiservicestests/src/com/android/server/notification/NotificationManagerServiceTest.java
index 4bbdb5839aba..4b79f1674f2c 100755
--- a/services/tests/uiservicestests/src/com/android/server/notification/NotificationManagerServiceTest.java
+++ b/services/tests/uiservicestests/src/com/android/server/notification/NotificationManagerServiceTest.java
@@ -2635,6 +2635,73 @@ public class NotificationManagerServiceTest extends UiServiceTestCase {
     }
 
     @Test
+    public void testUpdateNotificationChannelFromPrivilegedListener_noSoundUriPermission()
+            throws Exception {
+        mService.setPreferencesHelper(mPreferencesHelper);
+        List<String> associations = new ArrayList<>();
+        associations.add("a");
+        when(mCompanionMgr.getAssociations(PKG, UserHandle.getUserId(mUid)))
+                .thenReturn(associations);
+        when(mPreferencesHelper.getNotificationChannel(eq(PKG), anyInt(),
+                eq(mTestNotificationChannel.getId()), anyBoolean()))
+                .thenReturn(mTestNotificationChannel);
+
+        final Uri soundUri = Uri.parse("content://media/test/sound/uri");
+        final NotificationChannel updatedNotificationChannel = new NotificationChannel(
+                TEST_CHANNEL_ID, TEST_CHANNEL_ID, IMPORTANCE_DEFAULT);
+        updatedNotificationChannel.setSound(soundUri,
+                updatedNotificationChannel.getAudioAttributes());
+
+        doThrow(new SecurityException("no access")).when(mUgmInternal)
+                .checkGrantUriPermission(eq(Process.myUid()), any(), eq(soundUri),
+                anyInt(), eq(Process.myUserHandle().getIdentifier()));
+
+        assertThrows(SecurityException.class,
+                () -> mBinderService.updateNotificationChannelFromPrivilegedListener(null, PKG,
+                Process.myUserHandle(), updatedNotificationChannel));
+
+        verify(mPreferencesHelper, never()).updateNotificationChannel(
+                anyString(), anyInt(), any(), anyBoolean());
+
+        verify(mListeners, never()).notifyNotificationChannelChanged(eq(PKG),
+                eq(Process.myUserHandle()), eq(mTestNotificationChannel),
+                eq(NotificationListenerService.NOTIFICATION_CHANNEL_OR_GROUP_UPDATED));
+    }
+
+    @Test
+    public void testUpdateNotificationChannelFromPrivilegedListener_noSoundUriPermission_sameSound()
+            throws Exception {
+        mService.setPreferencesHelper(mPreferencesHelper);
+        List<String> associations = new ArrayList<>();
+        associations.add("a");
+        when(mCompanionMgr.getAssociations(PKG, UserHandle.getUserId(mUid)))
+                .thenReturn(associations);
+        when(mPreferencesHelper.getNotificationChannel(eq(PKG), anyInt(),
+                eq(mTestNotificationChannel.getId()), anyBoolean()))
+                .thenReturn(mTestNotificationChannel);
+
+        final Uri soundUri = Settings.System.DEFAULT_NOTIFICATION_URI;
+        final NotificationChannel updatedNotificationChannel = new NotificationChannel(
+                TEST_CHANNEL_ID, TEST_CHANNEL_ID, IMPORTANCE_DEFAULT);
+        updatedNotificationChannel.setSound(soundUri,
+                updatedNotificationChannel.getAudioAttributes());
+
+        doThrow(new SecurityException("no access")).when(mUgmInternal)
+                .checkGrantUriPermission(eq(Process.myUid()), any(), eq(soundUri),
+                    anyInt(), eq(Process.myUserHandle().getIdentifier()));
+
+        mBinderService.updateNotificationChannelFromPrivilegedListener(
+                null, PKG, Process.myUserHandle(), updatedNotificationChannel);
+
+        verify(mPreferencesHelper, times(1)).updateNotificationChannel(
+                anyString(), anyInt(), any(), anyBoolean());
+
+        verify(mListeners, never()).notifyNotificationChannelChanged(eq(PKG),
+                eq(Process.myUserHandle()), eq(mTestNotificationChannel),
+                eq(NotificationListenerService.NOTIFICATION_CHANNEL_OR_GROUP_UPDATED));
+    }
+
+    @Test
     public void testGetNotificationChannelFromPrivilegedListener_cdm_success() throws Exception {
         mService.setPreferencesHelper(mPreferencesHelper);
         List<String> associations = new ArrayList<>();