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Commit abd727d7 authored by George Chan's avatar George Chan
Browse files

Updated BackgroundInstallControlService to use historical sessions to 

retrieve install start time.

Test: atest BinaryTransparencyHostTest BackgroundInstallControlServiceHostTest BackgroundInstallControlServiceTest BackgroundInstallControlCallbackHelperTest
Bug: 296058502
Change-Id: I663e80f9ccb98e825468980195d6267386f86184
parent 22735c97

services/core/java/com/android/server/pm/BackgroundInstallControlService.java

+55 −17
Original line number Original line Diff line number Diff line
@@ -30,6 +30,7 @@ import android.content.pm.ApplicationInfo; 
import android.content.pm.IBackgroundInstallControlService;

import android.content.pm.IBackgroundInstallControlService;

import android.content.pm.InstallSourceInfo;

import android.content.pm.InstallSourceInfo;

import android.content.pm.PackageInfo;

import android.content.pm.PackageInfo;

import android.content.pm.PackageInstaller;

import android.content.pm.PackageManager;

import android.content.pm.PackageManager;

import android.content.pm.PackageManagerInternal;

import android.content.pm.PackageManagerInternal;

import android.content.pm.ParceledListSlice;

import android.content.pm.ParceledListSlice;
@@ -46,6 +47,7 @@ import android.os.UserHandle; 
import android.text.TextUtils;

import android.text.TextUtils;

import android.util.ArraySet;

import android.util.ArraySet;

import android.util.AtomicFile;

import android.util.AtomicFile;

import android.util.Log;

import android.util.Slog;

import android.util.Slog;

import android.util.SparseArrayMap;

import android.util.SparseArrayMap;

import android.util.SparseSetArray;

import android.util.SparseSetArray;
@@ -63,8 +65,10 @@ import java.io.FileInputStream; 
import java.io.FileOutputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.IOException;

import java.util.ArrayList;

import java.util.ArrayList;

import java.util.Comparator;

import java.util.List;

import java.util.List;

import java.util.ListIterator;

import java.util.ListIterator;

import java.util.Optional;

import java.util.Set;

import java.util.Set;

import java.util.TreeSet;

import java.util.TreeSet;
@@ -103,6 +107,24 @@ public class BackgroundInstallControlService extends SystemService { 
    private final SparseArrayMap<String, TreeSet<ForegroundTimeFrame>>

    private final SparseArrayMap<String, TreeSet<ForegroundTimeFrame>>

            mInstallerForegroundTimeFrames = new SparseArrayMap<>();

            mInstallerForegroundTimeFrames = new SparseArrayMap<>();





    @VisibleForTesting

    protected final PackageManagerInternal.PackageListObserver mPackageObserver =

            new PackageManagerInternal.PackageListObserver() {

                @Override

                public void onPackageAdded(String packageName, int uid) {

                    final int userId = UserHandle.getUserId(uid);

                    mHandler.obtainMessage(MSG_PACKAGE_ADDED, userId, 0, packageName)

                            .sendToTarget();

                }



                @Override

                public void onPackageRemoved(String packageName, int uid) {

                    final int userId = UserHandle.getUserId(uid);

                    mHandler.obtainMessage(MSG_PACKAGE_REMOVED, userId, 0, packageName)

                            .sendToTarget();

                }

            };



    public BackgroundInstallControlService(@NonNull Context context) {

    public BackgroundInstallControlService(@NonNull Context context) {

        this(new InjectorImpl(context));

        this(new InjectorImpl(context));

    }

    }
@@ -258,6 +280,7 @@ public class BackgroundInstallControlService extends SystemService { 




        String installerPackageName;

        String installerPackageName;

        String initiatingPackageName;

        String initiatingPackageName;



        try {

        try {

            final InstallSourceInfo installInfo = mPackageManager.getInstallSourceInfo(packageName);

            final InstallSourceInfo installInfo = mPackageManager.getInstallSourceInfo(packageName);

            installerPackageName = installInfo.getInstallingPackageName();

            installerPackageName = installInfo.getInstallingPackageName();
@@ -280,7 +303,8 @@ public class BackgroundInstallControlService extends SystemService { 




        // convert up-time to current time.

        // convert up-time to current time.

        final long installTimestamp =

        final long installTimestamp =

                System.currentTimeMillis() - (SystemClock.uptimeMillis() - appInfo.createTimestamp);

                System.currentTimeMillis() - (SystemClock.uptimeMillis()

                        - retrieveInstallStartTimestamp(packageName, userId, appInfo));





        if (installedByAdb(initiatingPackageName)

        if (installedByAdb(initiatingPackageName)

                || wasForegroundInstallation(installerPackageName, userId, installTimestamp)) {

                || wasForegroundInstallation(installerPackageName, userId, installTimestamp)) {
@@ -293,6 +317,35 @@ public class BackgroundInstallControlService extends SystemService { 
        writeBackgroundInstalledPackagesToDisk();

        writeBackgroundInstalledPackagesToDisk();

    }

    }





    private long retrieveInstallStartTimestamp(String packageName,

                                               int userId, ApplicationInfo appInfo) {

        long installStartTimestamp = appInfo.createTimestamp;



        try {

            Optional<PackageInstaller.SessionInfo> latestInstallSession =

                    getLatestInstallSession(packageName, userId);

            if (latestInstallSession.isEmpty()) {

                Slog.w(TAG, "Package's historical install session not found, falling back "

                        + "to appInfo.createTimestamp: " + packageName);

            } else {

                installStartTimestamp = latestInstallSession.get().getCreatedMillis();

            }

        } catch (Exception e) {

            Slog.w(TAG, "Retrieval of install time from historical session failed, falling "

                    + "back to appInfo.createTimestamp");

            Slog.w(TAG, Log.getStackTraceString(e));

        }

        return installStartTimestamp;

    }



    private Optional<PackageInstaller.SessionInfo> getLatestInstallSession(

            String packageName, int userId) {

        List<PackageInstaller.SessionInfo> historicalSessions =

                mPackageManagerInternal.getHistoricalSessions(userId).getList();

        return historicalSessions.stream().filter(s -> packageName.equals(s.getAppPackageName()))

                .max(Comparator.comparingLong(PackageInstaller.SessionInfo::getCreatedMillis));

    }



    // ADB sets installerPackageName to null, this creates a loophole to bypass BIC which will be

    // ADB sets installerPackageName to null, this creates a loophole to bypass BIC which will be

    // addressed with b/265203007

    // addressed with b/265203007

    private boolean installedByAdb(String initiatingPackageName) {

    private boolean installedByAdb(String initiatingPackageName) {
@@ -496,22 +549,7 @@ public class BackgroundInstallControlService extends SystemService { 
            publishBinderService(Context.BACKGROUND_INSTALL_CONTROL_SERVICE, mBinderService);

            publishBinderService(Context.BACKGROUND_INSTALL_CONTROL_SERVICE, mBinderService);

        }

        }





        mPackageManagerInternal.getPackageList(

        mPackageManagerInternal.getPackageList(mPackageObserver);

                new PackageManagerInternal.PackageListObserver() {

                    @Override

                    public void onPackageAdded(String packageName, int uid) {

                        final int userId = UserHandle.getUserId(uid);

                        mHandler.obtainMessage(MSG_PACKAGE_ADDED, userId, 0, packageName)

                                .sendToTarget();

                    }



                    @Override

                    public void onPackageRemoved(String packageName, int uid) {

                        final int userId = UserHandle.getUserId(uid);

                        mHandler.obtainMessage(MSG_PACKAGE_REMOVED, userId, 0, packageName)

                                .sendToTarget();

                    }

                });

    }

    }





    // The foreground time frame (ForegroundTimeFrame) represents the period

    // The foreground time frame (ForegroundTimeFrame) represents the period

services/tests/servicestests/src/com/android/server/pm/BackgroundInstallControlServiceTest.java

+131 −23
Original line number Original line Diff line number Diff line
@@ -43,8 +43,10 @@ import android.content.Context; 
import android.content.pm.ApplicationInfo;

import android.content.pm.ApplicationInfo;

import android.content.pm.InstallSourceInfo;

import android.content.pm.InstallSourceInfo;

import android.content.pm.PackageInfo;

import android.content.pm.PackageInfo;

import android.content.pm.PackageInstaller;

import android.content.pm.PackageManager;

import android.content.pm.PackageManager;

import android.content.pm.PackageManagerInternal;

import android.content.pm.PackageManagerInternal;

import android.content.pm.ParceledListSlice;

import android.os.FileUtils;

import android.os.FileUtils;

import android.os.Looper;

import android.os.Looper;

import android.os.RemoteException;

import android.os.RemoteException;
@@ -114,9 +116,6 @@ public final class BackgroundInstallControlServiceTest { 
    @Mock

    @Mock

    private BackgroundInstallControlCallbackHelper mCallbackHelper;

    private BackgroundInstallControlCallbackHelper mCallbackHelper;





    @Captor

    private ArgumentCaptor<PackageManagerInternal.PackageListObserver> mPackageListObserverCaptor;



    @Captor

    @Captor

    private ArgumentCaptor<UsageEventListener> mUsageEventListenerCaptor;

    private ArgumentCaptor<UsageEventListener> mUsageEventListenerCaptor;
@@ -137,8 +136,8 @@ public final class BackgroundInstallControlServiceTest { 
        mUsageEventListener = mUsageEventListenerCaptor.getValue();

        mUsageEventListener = mUsageEventListenerCaptor.getValue();





        mBackgroundInstallControlService.onStart(true);

        mBackgroundInstallControlService.onStart(true);

        verify(mPackageManagerInternal).getPackageList(mPackageListObserverCaptor.capture());



        mPackageListObserver = mPackageListObserverCaptor.getValue();

        mPackageListObserver = mBackgroundInstallControlService.mPackageObserver;

    }

    }





    @After

    @After
@@ -554,6 +553,7 @@ public final class BackgroundInstallControlServiceTest { 
        assertEquals(0, foregroundTimeFrames.size());

        assertEquals(0, foregroundTimeFrames.size());

    }

    }





    //package installed, but no UI interaction found

    @Test

    @Test

    public void testHandleUsageEvent_packageAddedNoUsageEvent()

    public void testHandleUsageEvent_packageAddedNoUsageEvent()

            throws NoSuchFieldException, PackageManager.NameNotFoundException {

            throws NoSuchFieldException, PackageManager.NameNotFoundException {
@@ -571,12 +571,10 @@ public final class BackgroundInstallControlServiceTest { 
        when(mPackageManager.getApplicationInfoAsUser(eq(PACKAGE_NAME_1), any(), anyInt()))

        when(mPackageManager.getApplicationInfoAsUser(eq(PACKAGE_NAME_1), any(), anyInt()))

                .thenReturn(appInfo);

                .thenReturn(appInfo);





        long createTimestamp =

                PACKAGE_ADD_TIMESTAMP_1 - (System.currentTimeMillis() - SystemClock.uptimeMillis());

        FieldSetter.setField(

        FieldSetter.setField(

                appInfo,

                appInfo,

                ApplicationInfo.class.getDeclaredField("createTimestamp"),

                ApplicationInfo.class.getDeclaredField("createTimestamp"),

                createTimestamp);

                convertToTestAdjustTimestamp(PACKAGE_ADD_TIMESTAMP_1));





        int uid = USER_ID_1 * UserHandle.PER_USER_RANGE;

        int uid = USER_ID_1 * UserHandle.PER_USER_RANGE;

        assertEquals(USER_ID_1, UserHandle.getUserId(uid));

        assertEquals(USER_ID_1, UserHandle.getUserId(uid));
@@ -590,6 +588,10 @@ public final class BackgroundInstallControlServiceTest { 
        assertTrue(packages.contains(USER_ID_1, PACKAGE_NAME_1));

        assertTrue(packages.contains(USER_ID_1, PACKAGE_NAME_1));

    }

    }





    private long convertToTestAdjustTimestamp(long timestamp) {

        return timestamp - (System.currentTimeMillis() - SystemClock.uptimeMillis());

    }



    @Test

    @Test

    public void testHandleUsageEvent_packageAddedInsideTimeFrame()

    public void testHandleUsageEvent_packageAddedInsideTimeFrame()

            throws NoSuchFieldException, PackageManager.NameNotFoundException {

            throws NoSuchFieldException, PackageManager.NameNotFoundException {
@@ -607,12 +609,10 @@ public final class BackgroundInstallControlServiceTest { 
        when(mPackageManager.getApplicationInfoAsUser(eq(PACKAGE_NAME_1), any(), anyInt()))

        when(mPackageManager.getApplicationInfoAsUser(eq(PACKAGE_NAME_1), any(), anyInt()))

                .thenReturn(appInfo);

                .thenReturn(appInfo);





        long createTimestamp =

                PACKAGE_ADD_TIMESTAMP_1 - (System.currentTimeMillis() - SystemClock.uptimeMillis());

        FieldSetter.setField(

        FieldSetter.setField(

                appInfo,

                appInfo,

                ApplicationInfo.class.getDeclaredField("createTimestamp"),

                ApplicationInfo.class.getDeclaredField("createTimestamp"),

                createTimestamp);

                convertToTestAdjustTimestamp(PACKAGE_ADD_TIMESTAMP_1));





        int uid = USER_ID_1 * UserHandle.PER_USER_RANGE;

        int uid = USER_ID_1 * UserHandle.PER_USER_RANGE;

        assertEquals(USER_ID_1, UserHandle.getUserId(uid));

        assertEquals(USER_ID_1, UserHandle.getUserId(uid));
@@ -638,6 +638,122 @@ public final class BackgroundInstallControlServiceTest { 
        assertNull(mBackgroundInstallControlService.getBackgroundInstalledPackages());

        assertNull(mBackgroundInstallControlService.getBackgroundInstalledPackages());

    }

    }





    @Test

    public void testHandleUsageEvent_fallsBackToAppInfoTimeWhenHistoricalSessionsNotFound()

            throws NoSuchFieldException, PackageManager.NameNotFoundException {

        assertNull(mBackgroundInstallControlService.getBackgroundInstalledPackages());

        InstallSourceInfo installSourceInfo =

                new InstallSourceInfo(

                        /* initiatingPackageName= */ INSTALLER_NAME_1,

                        /* initiatingPackageSigningInfo= */ null,

                        /* originatingPackageName= */ null,

                        /* installingPackageName= */ INSTALLER_NAME_1);

        assertEquals(installSourceInfo.getInstallingPackageName(), INSTALLER_NAME_1);

        when(mPackageManager.getInstallSourceInfo(anyString())).thenReturn(installSourceInfo);

        ApplicationInfo appInfo = mock(ApplicationInfo.class);



        when(mPackageManager.getApplicationInfoAsUser(eq(PACKAGE_NAME_1), any(), anyInt()))

                .thenReturn(appInfo);



        FieldSetter.setField(

                appInfo,

                ApplicationInfo.class.getDeclaredField("createTimestamp"),

                // create timestamp is after generated foreground events (hence not considered

                // foreground install)

                convertToTestAdjustTimestamp(USAGE_EVENT_TIMESTAMP_2 + 1));



        int uid = USER_ID_1 * UserHandle.PER_USER_RANGE;

        assertEquals(USER_ID_1, UserHandle.getUserId(uid));



        createPackageManagerHistoricalSessions(List.of(), USER_ID_1);



        // The 2 relevants usage events are before the timeframe, the app is not considered

        // foreground installed.

        doReturn(PERMISSION_GRANTED)

                .when(mPermissionManager)

                .checkPermission(anyString(), anyString(), anyString(), anyInt());

        generateUsageEvent(

                UsageEvents.Event.ACTIVITY_RESUMED,

                USER_ID_1,

                INSTALLER_NAME_1,

                USAGE_EVENT_TIMESTAMP_1);

        generateUsageEvent(

                Event.ACTIVITY_STOPPED, USER_ID_1, INSTALLER_NAME_1, USAGE_EVENT_TIMESTAMP_2);



        mPackageListObserver.onPackageAdded(PACKAGE_NAME_1, uid);

        mTestLooper.dispatchAll();



        var packages = mBackgroundInstallControlService.getBackgroundInstalledPackages();

        assertNotNull(packages);

        assertEquals(1, packages.size());

        assertTrue(packages.contains(USER_ID_1, PACKAGE_NAME_1));

    }



    @Test

    public void testHandleUsageEvent_usesHistoricalSessionCreateTimeWhenHistoricalSessionsFound()

            throws NoSuchFieldException, PackageManager.NameNotFoundException {

        assertNull(mBackgroundInstallControlService.getBackgroundInstalledPackages());

        InstallSourceInfo installSourceInfo =

                new InstallSourceInfo(

                        /* initiatingPackageName= */ INSTALLER_NAME_1,

                        /* initiatingPackageSigningInfo= */ null,

                        /* originatingPackageName= */ null,

                        /* installingPackageName= */ INSTALLER_NAME_1);

        assertEquals(installSourceInfo.getInstallingPackageName(), INSTALLER_NAME_1);

        when(mPackageManager.getInstallSourceInfo(anyString())).thenReturn(installSourceInfo);

        ApplicationInfo appInfo = mock(ApplicationInfo.class);



        when(mPackageManager.getApplicationInfoAsUser(eq(PACKAGE_NAME_1), any(), anyInt()))

                .thenReturn(appInfo);



        FieldSetter.setField(

                appInfo,

                ApplicationInfo.class.getDeclaredField("createTimestamp"),

                //create timestamp is out of window of (after) the interact events

                convertToTestAdjustTimestamp(USAGE_EVENT_TIMESTAMP_2 + 1));



        int uid = USER_ID_1 * UserHandle.PER_USER_RANGE;

        assertEquals(USER_ID_1, UserHandle.getUserId(uid));



        PackageInstaller.SessionInfo installSession1 = mock(PackageInstaller.SessionInfo.class);

        PackageInstaller.SessionInfo installSession2 = mock(PackageInstaller.SessionInfo.class);

        doReturn(convertToTestAdjustTimestamp(0L)).when(installSession1).getCreatedMillis();

        doReturn(convertToTestAdjustTimestamp(PACKAGE_ADD_TIMESTAMP_1)).when(installSession2)

                .getCreatedMillis();

        doReturn(PACKAGE_NAME_1).when(installSession1).getAppPackageName();

        doReturn(PACKAGE_NAME_1).when(installSession2).getAppPackageName();

        createPackageManagerHistoricalSessions(List.of(installSession1, installSession2),

                USER_ID_1);



        // The following 2 generated usage events occur after historical session create times hence,

        // considered foreground install. The appInfo createTimestamp occurs after events, so the

        // app would be considered background install if it falls back to it as reference create

        // timestamp.

        doReturn(PERMISSION_GRANTED)

                .when(mPermissionManager)

                .checkPermission(anyString(), anyString(), anyString(), anyInt());

        generateUsageEvent(

                UsageEvents.Event.ACTIVITY_RESUMED,

                USER_ID_1,

                INSTALLER_NAME_1,

                USAGE_EVENT_TIMESTAMP_1);

        generateUsageEvent(

                Event.ACTIVITY_STOPPED, USER_ID_1, INSTALLER_NAME_1, USAGE_EVENT_TIMESTAMP_2);



        mPackageListObserver.onPackageAdded(PACKAGE_NAME_1, uid);

        mTestLooper.dispatchAll();



        assertNull(mBackgroundInstallControlService.getBackgroundInstalledPackages());

    }



    private void createPackageManagerHistoricalSessions(

            List<PackageInstaller.SessionInfo> sessions, int userId) {

        ParceledListSlice<PackageInstaller.SessionInfo> mockParcelList =

                mock(ParceledListSlice.class);

        when(mockParcelList.getList()).thenReturn(sessions);

        when(mPackageManagerInternal.getHistoricalSessions(userId)).thenReturn(mockParcelList);

    }



    @Test

    @Test

    public void testHandleUsageEvent_packageAddedOutsideTimeFrame1()

    public void testHandleUsageEvent_packageAddedOutsideTimeFrame1()

            throws NoSuchFieldException, PackageManager.NameNotFoundException {

            throws NoSuchFieldException, PackageManager.NameNotFoundException {
@@ -655,12 +771,10 @@ public final class BackgroundInstallControlServiceTest { 
        when(mPackageManager.getApplicationInfoAsUser(eq(PACKAGE_NAME_1), any(), anyInt()))

        when(mPackageManager.getApplicationInfoAsUser(eq(PACKAGE_NAME_1), any(), anyInt()))

                .thenReturn(appInfo);

                .thenReturn(appInfo);





        long createTimestamp =

                PACKAGE_ADD_TIMESTAMP_1 - (System.currentTimeMillis() - SystemClock.uptimeMillis());

        FieldSetter.setField(

        FieldSetter.setField(

                appInfo,

                appInfo,

                ApplicationInfo.class.getDeclaredField("createTimestamp"),

                ApplicationInfo.class.getDeclaredField("createTimestamp"),

                createTimestamp);

                convertToTestAdjustTimestamp(PACKAGE_ADD_TIMESTAMP_1));





        int uid = USER_ID_1 * UserHandle.PER_USER_RANGE;

        int uid = USER_ID_1 * UserHandle.PER_USER_RANGE;

        assertEquals(USER_ID_1, UserHandle.getUserId(uid));

        assertEquals(USER_ID_1, UserHandle.getUserId(uid));
@@ -708,12 +822,10 @@ public final class BackgroundInstallControlServiceTest { 
        when(mPackageManager.getApplicationInfoAsUser(eq(PACKAGE_NAME_1), any(), anyInt()))

        when(mPackageManager.getApplicationInfoAsUser(eq(PACKAGE_NAME_1), any(), anyInt()))

                .thenReturn(appInfo);

                .thenReturn(appInfo);





        long createTimestamp =

                PACKAGE_ADD_TIMESTAMP_1 - (System.currentTimeMillis() - SystemClock.uptimeMillis());

        FieldSetter.setField(

        FieldSetter.setField(

                appInfo,

                appInfo,

                ApplicationInfo.class.getDeclaredField("createTimestamp"),

                ApplicationInfo.class.getDeclaredField("createTimestamp"),

                createTimestamp);

                convertToTestAdjustTimestamp(PACKAGE_ADD_TIMESTAMP_1));





        int uid = USER_ID_1 * UserHandle.PER_USER_RANGE;

        int uid = USER_ID_1 * UserHandle.PER_USER_RANGE;

        assertEquals(USER_ID_1, UserHandle.getUserId(uid));

        assertEquals(USER_ID_1, UserHandle.getUserId(uid));
@@ -765,12 +877,10 @@ public final class BackgroundInstallControlServiceTest { 
        when(mPackageManager.getApplicationInfoAsUser(eq(PACKAGE_NAME_1), any(), anyInt()))

        when(mPackageManager.getApplicationInfoAsUser(eq(PACKAGE_NAME_1), any(), anyInt()))

                .thenReturn(appInfo);

                .thenReturn(appInfo);





        long createTimestamp =

                PACKAGE_ADD_TIMESTAMP_1 - (System.currentTimeMillis() - SystemClock.uptimeMillis());

        FieldSetter.setField(

        FieldSetter.setField(

                appInfo,

                appInfo,

                ApplicationInfo.class.getDeclaredField("createTimestamp"),

                ApplicationInfo.class.getDeclaredField("createTimestamp"),

                createTimestamp);

                convertToTestAdjustTimestamp(PACKAGE_ADD_TIMESTAMP_1));





        int uid = USER_ID_1 * UserHandle.PER_USER_RANGE;

        int uid = USER_ID_1 * UserHandle.PER_USER_RANGE;

        assertEquals(USER_ID_1, UserHandle.getUserId(uid));

        assertEquals(USER_ID_1, UserHandle.getUserId(uid));
@@ -818,12 +928,10 @@ public final class BackgroundInstallControlServiceTest { 
        when(mPackageManager.getApplicationInfoAsUser(eq(PACKAGE_NAME_1), any(), anyInt()))

        when(mPackageManager.getApplicationInfoAsUser(eq(PACKAGE_NAME_1), any(), anyInt()))

                .thenReturn(appInfo);

                .thenReturn(appInfo);





        long createTimestamp =

                PACKAGE_ADD_TIMESTAMP_1 - (System.currentTimeMillis() - SystemClock.uptimeMillis());

        FieldSetter.setField(

        FieldSetter.setField(

                appInfo,

                appInfo,

                ApplicationInfo.class.getDeclaredField("createTimestamp"),

                ApplicationInfo.class.getDeclaredField("createTimestamp"),

                createTimestamp);

                convertToTestAdjustTimestamp(PACKAGE_ADD_TIMESTAMP_1));





        int uid = USER_ID_1 * UserHandle.PER_USER_RANGE;

        int uid = USER_ID_1 * UserHandle.PER_USER_RANGE;

        assertEquals(USER_ID_1, UserHandle.getUserId(uid));

        assertEquals(USER_ID_1, UserHandle.getUserId(uid));