Open source fully obfuscated stub

stub/src/main/java/com/topjohnwu/magisk/DelegateApplication.java

@@ -7,6 +7,9 @@ import android.content.res.Configuration;
 
 import java.lang.reflect.Method;
 
+import io.michaelrocks.paranoid.Obfuscate;
+
+@Obfuscate
 public class DelegateApplication extends Application {
 
     static boolean dynLoad = false;

stub/src/main/java/com/topjohnwu/magisk/DownloadActivity.java

@@ -1,5 +1,14 @@
 package com.topjohnwu.magisk;
 
+import static android.R.string.no;
+import static android.R.string.ok;
+import static android.R.string.yes;
+import static com.topjohnwu.magisk.DelegateApplication.dynLoad;
+import static com.topjohnwu.magisk.A.string.dling;
+import static com.topjohnwu.magisk.A.string.no_internet_msg;
+import static com.topjohnwu.magisk.A.string.relaunch_app;
+import static com.topjohnwu.magisk.A.string.upgrade_msg;
+
 import android.app.Activity;
 import android.app.AlertDialog;
 import android.app.ProgressDialog;
@@ -16,17 +25,22 @@ import com.topjohnwu.magisk.utils.APKInstall;
 
 import org.json.JSONException;
 
+import java.io.ByteArrayInputStream;
 import java.io.File;
+import java.io.FileOutputStream;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.util.zip.GZIPInputStream;
 
-import static android.R.string.no;
-import static android.R.string.ok;
-import static android.R.string.yes;
-import static com.topjohnwu.magisk.DelegateApplication.dynLoad;
-import static com.topjohnwu.magisk.R.string.dling;
-import static com.topjohnwu.magisk.R.string.no_internet_msg;
-import static com.topjohnwu.magisk.R.string.relaunch_app;
-import static com.topjohnwu.magisk.R.string.upgrade_msg;
+import javax.crypto.Cipher;
+import javax.crypto.CipherInputStream;
+import javax.crypto.SecretKey;
+import javax.crypto.spec.IvParameterSpec;
+import javax.crypto.spec.SecretKeySpec;
 
+import io.michaelrocks.paranoid.Obfuscate;
+
+@Obfuscate
 public class DownloadActivity extends Activity {
 
     private static final String APP_NAME = "Magisk";
@@ -41,6 +55,9 @@ public class DownloadActivity extends Activity {
         super.onCreate(savedInstanceState);
         themed = new ContextThemeWrapper(this, android.R.style.Theme_DeviceDefault);
 
+        // Inject resources
+        loadResources();
+
         if (Networking.checkNetworkStatus(this)) {
             if (apkLink == null) {
                 fetchCanary();
@@ -111,4 +128,26 @@ public class DownloadActivity extends Activity {
         });
     }
 
+    private void loadResources() {
+        File apk = new File(getCacheDir(), "res.apk");
+        try {
+            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
+            SecretKey key = new SecretKeySpec(Bytes.key(), "AES");
+            IvParameterSpec iv = new IvParameterSpec(Bytes.iv());
+            cipher.init(Cipher.DECRYPT_MODE, key, iv);
+            InputStream is = new CipherInputStream(new ByteArrayInputStream(Bytes.res()), cipher);
+            try (InputStream gzip = new GZIPInputStream(is);
+                 OutputStream out = new FileOutputStream(apk)) {
+                byte[] buf = new byte[4096];
+                for (int read; (read = gzip.read(buf)) >= 0;) {
+                    out.write(buf, 0, read);
+                }
+            }
+            DynAPK.addAssetPath(getResources().getAssets(), apk.getPath());
+        } catch (Exception e) {
+            // Should not happen
+            e.printStackTrace();
+        }
+    }
+
 }

stub/src/main/java/com/topjohnwu/magisk/InjectAPK.java

@@ -17,6 +17,9 @@ import java.io.InputStream;
 import java.io.OutputStream;
 import java.lang.reflect.Field;
 
+import io.michaelrocks.paranoid.Obfuscate;
+
+@Obfuscate
 public class InjectAPK {
 
     static Object componentFactory;

stub/src/main/java/com/topjohnwu/magisk/Mapping.java

@@ -1,43 +0,0 @@
-package com.topjohnwu.magisk;
-
-import com.topjohnwu.magisk.dummy.DummyReceiver;
-
-import java.util.HashMap;
-import java.util.Map;
-
-/**
- * These are just some random class names hardcoded as an example.
- * For the actual release builds, these mappings will be auto generated.
- */
-public class Mapping {
-
-    private static final Map<String, String> map = new HashMap<>();
-    public static final Map<String, Class<?>> internalMap = new HashMap<>();
-    public static final Map<String, String> inverseMap;
-
-    static {
-        map.put("a.Q", "com.topjohnwu.magisk.core.App");
-        map.put("f.u7", "com.topjohnwu.magisk.core.SplashActivity");
-        map.put("fxQ.lk", "com.topjohnwu.magisk.core.Provider");
-        map.put("yy.E", "com.topjohnwu.magisk.core.Receiver");
-        map.put("xt.R", "com.topjohnwu.magisk.ui.MainActivity");
-        map.put("lt5.a", "com.topjohnwu.magisk.ui.surequest.SuRequestActivity");
-        map.put("d.s", "com.topjohnwu.magisk.core.download.DownloadService");
-        map.put("w.d", "androidx.work.impl.background.systemjob.SystemJobService");
-
-        internalMap.put("a.Q", DelegateApplication.class);
-        internalMap.put("f.u7", DownloadActivity.class);
-        internalMap.put("fxQ.lk", FileProvider.class);
-        internalMap.put("yy.E", DummyReceiver.class);
-
-        inverseMap = new HashMap<>(map.size());
-        for (Map.Entry<String, String> e : map.entrySet()) {
-            inverseMap.put(e.getValue(), e.getKey());
-        }
-    }
-
-    public static String get(String name) {
-        String n = map.get(name);
-        return n != null ? n : name;
-    }
-}

stub/src/main/java/com/topjohnwu/magisk/net/Networking.java

@@ -10,6 +10,9 @@ import java.io.IOException;
 import java.net.HttpURLConnection;
 import java.net.URL;
 
+import io.michaelrocks.paranoid.Obfuscate;
+
+@Obfuscate
 public class Networking {
 
     private static final int READ_TIMEOUT = 15000;

stub/src/main/java/com/topjohnwu/magisk/net/Request.java

@@ -20,6 +20,9 @@ import java.net.HttpURLConnection;
 import java.util.Scanner;
 import java.util.concurrent.Executor;
 
+import io.michaelrocks.paranoid.Obfuscate;
+
+@Obfuscate
 public class Request implements Closeable {
     private HttpURLConnection conn;
     private Executor executor = null;