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Commit 434af556 authored by Guillaume Jacquart's avatar Guillaume Jacquart Committed by Nishith Khanna
Browse files

feat:2400: fake location from AdvancedPrivacy ContentProvider.

parent cfe0f426

core/api/current.txt

+1 −0
Original line number Diff line number Diff line
@@ -258,6 +258,7 @@ package android { 
    field public static final String READ_CONTACTS = "android.permission.READ_CONTACTS";

    field @FlaggedApi("com.android.server.feature.flags.enable_read_dropbox_permission") public static final String READ_DROPBOX_DATA = "android.permission.READ_DROPBOX_DATA";

    field public static final String READ_EXTERNAL_STORAGE = "android.permission.READ_EXTERNAL_STORAGE";

    field public static final String READ_FAKE_LOCATION_SETTINGS = "foundation.e.permission.READ_FAKE_LOCATION_SETTINGS";

    field public static final String READ_HOME_APP_SEARCH_DATA = "android.permission.READ_HOME_APP_SEARCH_DATA";

    field @Deprecated public static final String READ_INPUT_STATE = "android.permission.READ_INPUT_STATE";

    field public static final String READ_LOGS = "android.permission.READ_LOGS";

core/api/lint-baseline.txt

+2 −0
Original line number Diff line number Diff line
@@ -1627,3 +1627,5 @@ UnflaggedApi: android.view.inputmethod.InlineSuggestionsRequest.Builder#setClien 
    New API must be flagged with @FlaggedApi: method android.view.inputmethod.InlineSuggestionsRequest.Builder.setClientSupported(boolean)

UnflaggedApi: android.view.inputmethod.InlineSuggestionsRequest.Builder#setServiceSupported(boolean):

    New API must be flagged with @FlaggedApi: method android.view.inputmethod.InlineSuggestionsRequest.Builder.setServiceSupported(boolean)

UnflaggedApi: android.Manifest.permission#READ_FAKE_LOCATION_SETTINGS:

    New API must be flagged with @FlaggedApi: field android.Manifest.permission.READ_FAKE_LOCATION_SETTINGS

core/res/AndroidManifest.xml

+5 −0
Original line number Diff line number Diff line
@@ -8996,6 +8996,11 @@ 
    <permission android:name="android.permission.RESERVED_FOR_TESTING_SIGNATURE"

                android:protectionLevel="signature"/>

    

    <!-- /e/OS addition: read fake location set by the user in AdvancedPrivacy. -->

    <permission android:name="foundation.e.permission.READ_FAKE_LOCATION_SETTINGS"

        android:protectionLevel="signature" />

    <uses-permission android:name="foundation.e.permission.READ_FAKE_LOCATION_SETTINGS" />



    <!-- @SystemApi

        @FlaggedApi("android.media.tv.flags.kids_mode_tvdb_sharing")

        This permission is required when accessing information related to

services/core/java/com/android/server/location/FakeLocationResolver.java

0 → 100644
+139 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2024 E FOUNDATION

 *

 * This program is free software: you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation, either version 3 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program.  If not, see <https://www.gnu.org/licenses/>.

 */



package com.android.server.location;



import android.annotation.NonNull;

import android.annotation.Nullable;

import android.content.Context;

import android.location.Location;

import android.location.LocationResult;

import android.location.util.identity.CallerIdentity;

import android.net.Uri;

import android.os.Bundle;

import android.util.Log;



import java.util.ArrayList;

import java.util.List;



public class FakeLocationResolver {

    public static final String TAG = "FakeLocationResolver";



    private static final String FAKE_LOCATIONS_URI = "content://foundation.e.advancedprivacy.fakelocations";



    private static final String PARAM_UID = "uid";

    private static final String PARAM_LATITUDE = "latitude";

    private static final String PARAM_LONGITUDE = "longitude";



    public static @Nullable LocationResult fakeLocations(

            @NonNull Context context,

            @Nullable LocationResult baseLocations,

            @NonNull CallerIdentity identity) {

        final int uid = identity.getUid();

        final String packageName = identity.getPackageName();



        if (baseLocations == null || packageName == null || uid < 0) {

            Log.w(TAG, "FakeLocationResolver::fakeLocations invalid parameters");

            return baseLocations;

        }

        final FakeLocation latLon = getFakeLocation(context, packageName, uid);

        if (latLon == null) return baseLocations;



        return LocationResult.wrap(overrideLatLon(baseLocations.asList(), latLon));

    }



    public static @Nullable Location fakeLocation(

            @NonNull Context context,

            @Nullable Location baseLocation,

            @NonNull CallerIdentity identity) {

        final int uid = identity.getUid();

        final String packageName = identity.getPackageName();



        if (baseLocation == null || packageName == null || uid < 0) {

            Log.w(TAG, "FakeLocationResolver::fakeLocation invalid parameters");

            return baseLocation;

        }

        final FakeLocation latLon = getFakeLocation(context, packageName, uid);

        if (latLon == null) return baseLocation;



        return overrideLatLon(baseLocation, latLon);

    }



    public static boolean hasFakeLocation(@NonNull Context context, @NonNull CallerIdentity identity) {

        final int uid = identity.getUid();

        final String packageName = identity.getPackageName();



        if (packageName == null || uid < 0) {

            Log.w(TAG, "FakeLocationResolver::hasFakeLocation invalid parameters");

            return false;

        }

        final FakeLocation latLon = getFakeLocation(context, packageName, uid);

        if (latLon == null) return false;



        return true;

    }



    private static class FakeLocation {

        double latitude;

        double longitude;



        public FakeLocation(double latitude, double longitude) {

            this.latitude = latitude;

            this.longitude = longitude;

        }

    }



    private static @Nullable FakeLocation getFakeLocation(@NonNull Context context, @NonNull String packageName, int uid) {

        try {

            final Bundle extra = new Bundle();

            extra.putInt(PARAM_UID, uid);

            final Bundle result = context.getContentResolver().call(

                    Uri.parse(FAKE_LOCATIONS_URI),

                    "",

                    packageName,

                    extra

            );



            if (result != null && result.containsKey(PARAM_LATITUDE) && result.containsKey(PARAM_LONGITUDE)) {

                return new FakeLocation(result.getDouble(PARAM_LATITUDE), result.getDouble(PARAM_LONGITUDE));

            }

        } catch(Exception e) {

            Log.w(TAG, "Can't getFakeLocation", e);

        }

        return null;

    }



    private static @NonNull List<Location> overrideLatLon(@NonNull List<Location> baseLocations, @NonNull FakeLocation latLon) {

        final ArrayList<Location> fakedLocations = new ArrayList<Location>(baseLocations.size());

        for (Location location: baseLocations) {

            Location fakedLocation = overrideLatLon(location, latLon);



            fakedLocations.add(fakedLocation);

        }

        return fakedLocations;

    }



    private static @NonNull Location overrideLatLon(@NonNull Location baseLocation, @NonNull FakeLocation latLon) {

        final Location fakedLocation = new Location(baseLocation);

        fakedLocation.setLatitude(latLon.latitude);

        fakedLocation.setLongitude(latLon.longitude);

        fakedLocation.setAltitude(3.0);

        fakedLocation.setSpeed(0.01f);



        return fakedLocation;

    }

}

services/core/java/com/android/server/location/geofence/GeofenceManager.java

+4 −0
Original line number Diff line number Diff line
@@ -42,6 +42,7 @@ import android.util.ArraySet; 
import com.android.internal.annotations.GuardedBy;

import com.android.server.FgThread;

import com.android.server.PendingIntentUtils;

import com.android.server.location.FakeLocationResolver;

import com.android.server.location.LocationPermissions;

import com.android.server.location.injector.Injector;

import com.android.server.location.injector.LocationPermissionsHelper;
@@ -351,6 +352,9 @@ public class GeofenceManager extends 


        CallerIdentity identity = CallerIdentity.fromBinder(mContext, packageName,

                attributionTag, AppOpsManager.toReceiverId(pendingIntent));

        if (FakeLocationResolver.hasFakeLocation(mContext, identity)) {

            return;

        }



        final long ident = Binder.clearCallingIdentity();

        try {