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Re-implement duplicate Magisk Manager logic

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Starting from the next Magisk release, it will no longer prefer the package name com.topjohnwu.magisk over a hidden manager; it will always be aware whether the hidden manager exists, so when a package named com.topjohnwu.magisk is installed alongside with the hidden manager, com.topjohnwu.magisk will not have root access by default.
This will prevent malware from using the package name com.topjohnwu.magisk to gain root access when a user is using a hidden manager.
To support this new behavior, several changes has to be done:
- Never grant com.topjohnwu.magisk in Magisk Manager (if it IS the actual manager, MagiskSU will grant it by default)
- While hidden, remove com.topjohnwu.magisk if exists
- Restore Magisk Manager (unhide) has to be done with root
- Upgrading Magisk Manager should preserve package name (implemented in a949641)
This commit is contained in:
topjohnwu 2018-06-14 04:30:24 +08:00
parent d1f301e059
commit e6c1dd532d
6 changed files with 32 additions and 32 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
src/full/java/com/topjohnwu/magisk/MagiskManager.java
View File

@ -3,7 +3,6 @@ package com.topjohnwu.magisk;
import android.app.job.JobInfo;
import android.app.job.JobScheduler;
import android.content.ComponentName;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.pm.PackageManager;
import android.content.res.Configuration;
@ -131,25 +130,19 @@ public class MagiskManager extends Application implements Shell.Container {
});
prefs = PreferenceManager.getDefaultSharedPreferences(this);
// Handle duplicate package
if (!getPackageName().equals(Const.ORIG_PKG_NAME)) {
try {
getPackageManager().getApplicationInfo(Const.ORIG_PKG_NAME, 0);
Intent intent = getPackageManager().getLaunchIntentForPackage(Const.ORIG_PKG_NAME);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
return;
} catch (PackageManager.NameNotFoundException ignored) { /* Expected */ }
}
mDB = MagiskDatabaseHelper.getInstance(this);
String pkg = mDB.getStrings(Const.Key.SU_REQUESTER, Const.ORIG_PKG_NAME);
if (getPackageName().equals(Const.ORIG_PKG_NAME) && !pkg.equals(Const.ORIG_PKG_NAME)) {
mDB.setStrings(Const.Key.SU_REQUESTER, null);
String pkg = mDB.getStrings(Const.Key.SU_MANAGER, null);
if (pkg != null && getPackageName().equals(Const.ORIG_PKG_NAME)) {
mDB.setStrings(Const.Key.SU_MANAGER, null);
RootUtils.uninstallPkg(pkg);
mDB = MagiskDatabaseHelper.getInstance(this);
}
if (TextUtils.equals(pkg, getPackageName())) {
try {
// We are the manager, remove com.topjohnwu.magisk as it could be malware
getPackageManager().getApplicationInfo(Const.ORIG_PKG_NAME, 0);
RootUtils.uninstallPkg(Const.ORIG_PKG_NAME);
} catch (PackageManager.NameNotFoundException ignored) {}
}
setLocale();

28
src/full/java/com/topjohnwu/magisk/SettingsActivity.java
View File

@ -1,8 +1,8 @@
package com.topjohnwu.magisk;
import android.Manifest;
import android.content.Intent;
import android.content.Context;
import android.content.SharedPreferences;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.support.v14.preference.SwitchPreference;
@ -23,9 +23,10 @@ import android.widget.Toast;
import com.topjohnwu.magisk.asyncs.CheckUpdates;
import com.topjohnwu.magisk.asyncs.HideManager;
import com.topjohnwu.magisk.components.Activity;
import com.topjohnwu.magisk.receivers.ManagerUpdate;
import com.topjohnwu.magisk.receivers.DownloadReceiver;
import com.topjohnwu.magisk.utils.Const;
import com.topjohnwu.magisk.utils.FingerprintHelper;
import com.topjohnwu.magisk.utils.RootUtils;
import com.topjohnwu.magisk.utils.Topic;
import com.topjohnwu.magisk.utils.Utils;
import com.topjohnwu.superuser.Shell;
@ -166,15 +167,18 @@ public class SettingsActivity extends Activity implements Topic.Subscriber {
} else {
if (Utils.checkNetworkStatus()) {
restoreManager.setOnPreferenceClickListener((pref) -> {
runWithPermission(getActivity(),
new String[] { Manifest.permission.WRITE_EXTERNAL_STORAGE }, () -> {
Intent intent = new Intent(mm, ManagerUpdate.class);
intent.putExtra(Const.Key.INTENT_SET_LINK, mm.managerLink);
intent.putExtra(Const.Key.INTENT_SET_FILENAME,
Utils.fmt("MagiskManager-v%s(%d).apk",
mm.remoteManagerVersionString, mm.remoteManagerVersionCode));
mm.sendBroadcast(intent);
});
Utils.dlAndReceive(
getActivity(), new DownloadReceiver() {
@Override
public void onDownloadDone(Context context, Uri uri) {
mm.dumpPrefs();
if (RootUtils.cmdResult("pm install " + uri.getPath()))
RootUtils.uninstallPkg(context.getPackageName());
}
},
mm.managerLink,
Utils.fmt("MagiskManager-v%s.apk", mm.remoteManagerVersionString)
);
return true;
});
} else {

2
src/full/java/com/topjohnwu/magisk/asyncs/HideManager.java
View File

@ -77,7 +77,7 @@ public class HideManager extends ParallelTask<Void, Void, Boolean> {
repack.delete();
mm.mDB.setStrings(Const.Key.SU_REQUESTER, pkg);
mm.mDB.setStrings(Const.Key.SU_MANAGER, pkg);
mm.dumpPrefs();
RootUtils.uninstallPkg(Const.ORIG_PKG_NAME);

1
src/full/java/com/topjohnwu/magisk/receivers/ManagerUpdate.java
View File

@ -5,7 +5,6 @@ import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Handler;
import com.topjohnwu.magisk.utils.Const;
import com.topjohnwu.magisk.utils.PatchAPK;

4
src/full/java/com/topjohnwu/magisk/superuser/RequestActivity.java
View File

@ -277,6 +277,10 @@ public class RequestActivity extends Activity {
if (policy == null) {
policy = new Policy(uid, pm);
}
/* Never allow com.topjohnwu.magisk (could be malware) */
if (TextUtils.equals(policy.packageName, Const.ORIG_PKG_NAME))
return false;
} catch (Exception e) {
e.printStackTrace();
return false;

2
src/main/java/com/topjohnwu/magisk/utils/Const.java
View File

@ -94,7 +94,7 @@ public class Const {
public static final String ROOT_ACCESS = "root_access";
public static final String SU_MULTIUSER_MODE = "multiuser_mode";
public static final String SU_MNT_NS = "mnt_ns";
public static final String SU_REQUESTER = "requester";
public static final String SU_MANAGER = "requester";
public static final String SU_REQUEST_TIMEOUT = "su_request_timeout";
public static final String SU_AUTO_RESPONSE = "su_auto_response";
public static final String SU_NOTIFICATION = "su_notification";