From 1f789841fe3d6bb13124b5c505e256d18af14811 Mon Sep 17 00:00:00 2001 From: Wenhao Wang Date: Wed, 2 Feb 2022 10:56:44 -0800 Subject: [PATCH] DO NOT MERGE Suppress notifications when device enter lockdown This CL makes the following modifcations: 1. Add LockPatternUtils.StrongAuthTracker to monitor the lockdown mode status of the phone. 2. Call mListeners.notifyRemovedLocked with all the notifications in the mNotificationList when entering the lockdown mode. 3. Call mListeners.notifyPostedLocked with all the notifications in the mNotificationList when exiting the lockdown mode. 4. Dismiss the function calls of notifyPostedLocked, notifyRemovedLocked, and notifyRankingUpdateLocked during the lockdown mode. The CL also adds corresponding tests. Bug: 173721373 Test: atest NotificationManagerServiceTest Test: atest NotificationListenersTest Test: manually verify the paired device cannot receive notifications when the host phone is in lockdown mode. Ignore-AOSP-First: pending fix for a security issue. Change-Id: I7e83544863eeadf8272b6ff8a9bb8136d6466203 Merged-In: I7e83544863eeadf8272b6ff8a9bb8136d6466203 (cherry picked from commit 3cb6842a053e236cc98d7616ba4433c31ffda3ac) --- .../NotificationManagerService.java | 99 ++++++++++++++++++- .../tests/uiservicestests/AndroidManifest.xml | 1 + .../NotificationListenersTest.java | 72 +++++++++++++- .../NotificationManagerServiceTest.java | 64 +++++++++++- 4 files changed, 231 insertions(+), 5 deletions(-) diff --git a/services/core/java/com/android/server/notification/NotificationManagerService.java b/services/core/java/com/android/server/notification/NotificationManagerService.java index 5ed96bf7ebbae..97424640984bd 100755 --- a/services/core/java/com/android/server/notification/NotificationManagerService.java +++ b/services/core/java/com/android/server/notification/NotificationManagerService.java @@ -245,6 +245,7 @@ import android.util.Log; import android.util.Pair; import android.util.Slog; import android.util.SparseArray; +import android.util.SparseBooleanArray; import android.util.StatsEvent; import android.util.TypedXmlPullParser; import android.util.TypedXmlSerializer; @@ -277,6 +278,7 @@ import com.android.internal.util.DumpUtils; import com.android.internal.util.Preconditions; import com.android.internal.util.XmlUtils; import com.android.internal.util.function.TriPredicate; +import com.android.internal.widget.LockPatternUtils; import com.android.server.DeviceIdleInternal; import com.android.server.EventLogTags; import com.android.server.IoThread; @@ -1998,6 +2000,54 @@ public class NotificationManagerService extends SystemService { private SettingsObserver mSettingsObserver; protected ZenModeHelper mZenModeHelper; + protected class StrongAuthTracker extends LockPatternUtils.StrongAuthTracker { + + SparseBooleanArray mUserInLockDownMode = new SparseBooleanArray(); + boolean mIsInLockDownMode = false; + + StrongAuthTracker(Context context) { + super(context); + } + + private boolean containsFlag(int haystack, int needle) { + return (haystack & needle) != 0; + } + + public boolean isInLockDownMode() { + return mIsInLockDownMode; + } + + @Override + public synchronized void onStrongAuthRequiredChanged(int userId) { + boolean userInLockDownModeNext = containsFlag(getStrongAuthForUser(userId), + STRONG_AUTH_REQUIRED_AFTER_USER_LOCKDOWN); + mUserInLockDownMode.put(userId, userInLockDownModeNext); + boolean isInLockDownModeNext = mUserInLockDownMode.indexOfValue(true) != -1; + + if (mIsInLockDownMode == isInLockDownModeNext) { + return; + } + + if (isInLockDownModeNext) { + cancelNotificationsWhenEnterLockDownMode(); + } + + // When the mIsInLockDownMode is true, both notifyPostedLocked and + // notifyRemovedLocked will be dismissed. So we shall call + // cancelNotificationsWhenEnterLockDownMode before we set mIsInLockDownMode + // as true and call postNotificationsWhenExitLockDownMode after we set + // mIsInLockDownMode as false. + mIsInLockDownMode = isInLockDownModeNext; + + if (!isInLockDownModeNext) { + postNotificationsWhenExitLockDownMode(); + } + } + } + + private LockPatternUtils mLockPatternUtils; + private StrongAuthTracker mStrongAuthTracker; + public NotificationManagerService(Context context) { this(context, new NotificationRecordLoggerImpl(), @@ -2020,6 +2070,11 @@ public class NotificationManagerService extends SystemService { mAudioManager = audioMananger; } + @VisibleForTesting + void setStrongAuthTracker(StrongAuthTracker strongAuthTracker) { + mStrongAuthTracker = strongAuthTracker; + } + @VisibleForTesting void setKeyguardManager(KeyguardManager keyguardManager) { mKeyguardManager = keyguardManager; @@ -2207,6 +2262,8 @@ public class NotificationManagerService extends SystemService { ServiceManager.getService(Context.PLATFORM_COMPAT_SERVICE)); mUiHandler = new Handler(UiThread.get().getLooper()); + mLockPatternUtils = new LockPatternUtils(getContext()); + mStrongAuthTracker = new StrongAuthTracker(getContext()); String[] extractorNames; try { extractorNames = resources.getStringArray(R.array.config_notificationSignalExtractors); @@ -2689,6 +2746,7 @@ public class NotificationManagerService extends SystemService { bubbsExtractor.setShortcutHelper(mShortcutHelper); } registerNotificationPreferencesPullers(); + mLockPatternUtils.registerStrongAuthTracker(mStrongAuthTracker); } else if (phase == SystemService.PHASE_THIRD_PARTY_APPS_CAN_START) { // This observer will force an update when observe is called, causing us to // bind to listener services. @@ -9224,6 +9282,29 @@ public class NotificationManagerService extends SystemService { } } + private void cancelNotificationsWhenEnterLockDownMode() { + synchronized (mNotificationLock) { + int numNotifications = mNotificationList.size(); + for (int i = 0; i < numNotifications; i++) { + NotificationRecord rec = mNotificationList.get(i); + mListeners.notifyRemovedLocked(rec, REASON_CANCEL_ALL, + rec.getStats()); + } + + } + } + + private void postNotificationsWhenExitLockDownMode() { + synchronized (mNotificationLock) { + int numNotifications = mNotificationList.size(); + for (int i = 0; i < numNotifications; i++) { + NotificationRecord rec = mNotificationList.get(i); + mListeners.notifyPostedLocked(rec, rec); + } + + } + } + private void updateNotificationPulse() { synchronized (mNotificationLock) { updateLightsLocked(); @@ -9459,6 +9540,10 @@ public class NotificationManagerService extends SystemService { rankings.toArray(new NotificationListenerService.Ranking[0])); } + boolean isInLockDownMode() { + return mStrongAuthTracker.isInLockDownMode(); + } + boolean hasCompanionDevice(ManagedServiceInfo info) { if (mCompanionManager == null) { mCompanionManager = getCompanionManager(); @@ -10510,8 +10595,12 @@ public class NotificationManagerService extends SystemService { * targetting <= O_MR1 */ @GuardedBy("mNotificationLock") - private void notifyPostedLocked(NotificationRecord r, NotificationRecord old, + void notifyPostedLocked(NotificationRecord r, NotificationRecord old, boolean notifyAllListeners) { + if (isInLockDownMode()) { + return; + } + try { // Lazily initialized snapshots of the notification. StatusBarNotification sbn = r.getSbn(); @@ -10609,6 +10698,10 @@ public class NotificationManagerService extends SystemService { @GuardedBy("mNotificationLock") public void notifyRemovedLocked(NotificationRecord r, int reason, NotificationStats notificationStats) { + if (isInLockDownMode()) { + return; + } + final StatusBarNotification sbn = r.getSbn(); // make a copy in case changes are made to the underlying Notification object @@ -10654,6 +10747,10 @@ public class NotificationManagerService extends SystemService { */ @GuardedBy("mNotificationLock") public void notifyRankingUpdateLocked(List changedHiddenNotifications) { + if (isInLockDownMode()) { + return; + } + boolean isHiddenRankingUpdate = changedHiddenNotifications != null && changedHiddenNotifications.size() > 0; // TODO (b/73052211): if the ranking update changed the notification type, diff --git a/services/tests/uiservicestests/AndroidManifest.xml b/services/tests/uiservicestests/AndroidManifest.xml index 767857bf2de8b..e8e3a8f84f218 100644 --- a/services/tests/uiservicestests/AndroidManifest.xml +++ b/services/tests/uiservicestests/AndroidManifest.xml @@ -33,6 +33,7 @@ + diff --git a/services/tests/uiservicestests/src/com/android/server/notification/NotificationListenersTest.java b/services/tests/uiservicestests/src/com/android/server/notification/NotificationListenersTest.java index 50ebffc31035f..313f3078908d1 100644 --- a/services/tests/uiservicestests/src/com/android/server/notification/NotificationListenersTest.java +++ b/services/tests/uiservicestests/src/com/android/server/notification/NotificationListenersTest.java @@ -24,10 +24,12 @@ import static com.android.server.notification.NotificationManagerService.Notific import static com.google.common.truth.Truth.assertThat; -import static org.mockito.ArgumentMatchers.any; -import static org.mockito.ArgumentMatchers.anyInt; +import static org.mockito.Mockito.atLeast; import static org.mockito.Mockito.mock; +import static org.mockito.Mockito.never; +import static org.mockito.Mockito.reset; import static org.mockito.Mockito.spy; +import static org.mockito.Mockito.verify; import static org.mockito.Mockito.when; import android.app.INotificationManager; @@ -39,9 +41,10 @@ import android.content.pm.VersionedPackage; import android.os.Bundle; import android.service.notification.NotificationListenerFilter; import android.service.notification.NotificationListenerService; +import android.service.notification.NotificationStats; +import android.service.notification.StatusBarNotification; import android.util.ArraySet; import android.util.Pair; -import android.util.Slog; import android.util.TypedXmlPullParser; import android.util.TypedXmlSerializer; import android.util.Xml; @@ -52,11 +55,13 @@ import org.junit.Before; import org.junit.Test; import org.mockito.Mock; import org.mockito.MockitoAnnotations; +import org.mockito.internal.util.reflection.FieldSetter; import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; +import java.util.List; public class NotificationListenersTest extends UiServiceTestCase { @@ -355,4 +360,65 @@ public class NotificationListenersTest extends UiServiceTestCase { .getDisallowedPackages()).isEmpty(); } + @Test + public void testNotifyPostedLockedInLockdownMode() { + NotificationRecord r = mock(NotificationRecord.class); + NotificationRecord old = mock(NotificationRecord.class); + + // before the lockdown mode + when(mNm.isInLockDownMode()).thenReturn(false); + mListeners.notifyPostedLocked(r, old, true); + mListeners.notifyPostedLocked(r, old, false); + verify(r, atLeast(2)).getSbn(); + + // in the lockdown mode + reset(r); + reset(old); + when(mNm.isInLockDownMode()).thenReturn(true); + mListeners.notifyPostedLocked(r, old, true); + mListeners.notifyPostedLocked(r, old, false); + verify(r, never()).getSbn(); + } + + @Test + public void testnotifyRankingUpdateLockedInLockdownMode() { + List chn = mock(List.class); + + // before the lockdown mode + when(mNm.isInLockDownMode()).thenReturn(false); + mListeners.notifyRankingUpdateLocked(chn); + verify(chn, atLeast(1)).size(); + + // in the lockdown mode + reset(chn); + when(mNm.isInLockDownMode()).thenReturn(true); + mListeners.notifyRankingUpdateLocked(chn); + verify(chn, never()).size(); + } + + @Test + public void testNotifyRemovedLockedInLockdownMode() throws NoSuchFieldException { + NotificationRecord r = mock(NotificationRecord.class); + NotificationStats rs = mock(NotificationStats.class); + StatusBarNotification sbn = mock(StatusBarNotification.class); + FieldSetter.setField(mNm, + NotificationManagerService.class.getDeclaredField("mHandler"), + mock(NotificationManagerService.WorkerHandler.class)); + + // before the lockdown mode + when(mNm.isInLockDownMode()).thenReturn(false); + when(r.getSbn()).thenReturn(sbn); + mListeners.notifyRemovedLocked(r, 0, rs); + mListeners.notifyRemovedLocked(r, 0, rs); + verify(r, atLeast(2)).getSbn(); + + // in the lockdown mode + reset(r); + reset(rs); + when(mNm.isInLockDownMode()).thenReturn(true); + when(r.getSbn()).thenReturn(sbn); + mListeners.notifyRemovedLocked(r, 0, rs); + mListeners.notifyRemovedLocked(r, 0, rs); + verify(r, never()).getSbn(); + } } 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 5732edc731b22..e20efbbe044ef 100755 --- a/services/tests/uiservicestests/src/com/android/server/notification/NotificationManagerServiceTest.java +++ b/services/tests/uiservicestests/src/com/android/server/notification/NotificationManagerServiceTest.java @@ -58,9 +58,11 @@ import static android.service.notification.Adjustment.KEY_USER_SENTIMENT; import static android.service.notification.NotificationListenerService.FLAG_FILTER_TYPE_ALERTING; import static android.service.notification.NotificationListenerService.FLAG_FILTER_TYPE_CONVERSATIONS; import static android.service.notification.NotificationListenerService.FLAG_FILTER_TYPE_ONGOING; +import static android.service.notification.NotificationListenerService.REASON_CANCEL_ALL; import static android.service.notification.NotificationListenerService.Ranking.USER_SENTIMENT_NEGATIVE; import static android.service.notification.NotificationListenerService.Ranking.USER_SENTIMENT_NEUTRAL; +import static com.android.internal.widget.LockPatternUtils.StrongAuthTracker.STRONG_AUTH_REQUIRED_AFTER_USER_LOCKDOWN; import static com.android.server.notification.NotificationManagerService.ACTION_DISABLE_NAS; import static com.android.server.notification.NotificationManagerService.ACTION_ENABLE_NAS; import static com.android.server.notification.NotificationManagerService.ACTION_LEARNMORE_NAS; @@ -225,7 +227,6 @@ import java.util.Arrays; import java.util.Collections; import java.util.List; import java.util.Map; -import java.util.Set; import java.util.concurrent.CountDownLatch; import java.util.function.Consumer; @@ -411,8 +412,26 @@ public class NotificationManagerServiceTest extends UiServiceTestCase { interface NotificationAssistantAccessGrantedCallback { void onGranted(ComponentName assistant, int userId, boolean granted, boolean userSet); } + + class StrongAuthTrackerFake extends NotificationManagerService.StrongAuthTracker { + private int mGetStrongAuthForUserReturnValue = 0; + StrongAuthTrackerFake(Context context) { + super(context); + } + + public void setGetStrongAuthForUserReturnValue(int val) { + mGetStrongAuthForUserReturnValue = val; + } + + @Override + public int getStrongAuthForUser(int userId) { + return mGetStrongAuthForUserReturnValue; + } + } } + TestableNotificationManagerService.StrongAuthTrackerFake mStrongAuthTracker; + private class TestableToastCallback extends ITransientNotification.Stub { @Override public void show(IBinder windowToken) { @@ -532,6 +551,9 @@ public class NotificationManagerServiceTest extends UiServiceTestCase { mService.setAudioManager(mAudioManager); + mStrongAuthTracker = mService.new StrongAuthTrackerFake(mContext); + mService.setStrongAuthTracker(mStrongAuthTracker); + mShortcutHelper = mService.getShortcutHelper(); mShortcutHelper.setLauncherApps(mLauncherApps); mShortcutHelper.setShortcutServiceInternal(mShortcutServiceInternal); @@ -8419,4 +8441,44 @@ public class NotificationManagerServiceTest extends UiServiceTestCase { } } } + + @Test + public void testStrongAuthTracker_isInLockDownMode() { + mStrongAuthTracker.setGetStrongAuthForUserReturnValue( + STRONG_AUTH_REQUIRED_AFTER_USER_LOCKDOWN); + mStrongAuthTracker.onStrongAuthRequiredChanged(mContext.getUserId()); + assertTrue(mStrongAuthTracker.isInLockDownMode()); + mStrongAuthTracker.setGetStrongAuthForUserReturnValue(0); + mStrongAuthTracker.onStrongAuthRequiredChanged(mContext.getUserId()); + assertFalse(mStrongAuthTracker.isInLockDownMode()); + } + + @Test + public void testCancelAndPostNotificationsWhenEnterAndExitLockDownMode() { + // post 2 notifications from 2 packages + NotificationRecord pkgA = new NotificationRecord(mContext, + generateSbn("a", 1000, 9, 0), mTestNotificationChannel); + mService.addNotification(pkgA); + NotificationRecord pkgB = new NotificationRecord(mContext, + generateSbn("b", 1001, 9, 0), mTestNotificationChannel); + mService.addNotification(pkgB); + + // when entering the lockdown mode, cancel the 2 notifications. + mStrongAuthTracker.setGetStrongAuthForUserReturnValue( + STRONG_AUTH_REQUIRED_AFTER_USER_LOCKDOWN); + mStrongAuthTracker.onStrongAuthRequiredChanged(mContext.getUserId()); + assertTrue(mStrongAuthTracker.isInLockDownMode()); + + // the notifyRemovedLocked function is called twice due to REASON_LOCKDOWN. + ArgumentCaptor captor = ArgumentCaptor.forClass(Integer.class); + verify(mListeners, times(2)).notifyRemovedLocked(any(), captor.capture(), any()); + assertEquals(REASON_CANCEL_ALL, captor.getValue().intValue()); + + // exit lockdown mode. + mStrongAuthTracker.setGetStrongAuthForUserReturnValue(0); + mStrongAuthTracker.onStrongAuthRequiredChanged(mContext.getUserId()); + + // the notifyPostedLocked function is called twice. + verify(mListeners, times(2)).notifyPostedLocked(any(), any()); + } }