Open source stub APK loader

Close #3537
2025-09-06 06:36:58 +00:00 · 2020-12-29 01:44:02 -08:00
parent 6b42db943d
commit 41a644afb9
14 changed files with 381 additions and 11 deletions
@@ -0,0 +1,78 @@
+package com.topjohnwu.magisk;
+
+import android.app.AppComponentFactory;
+import android.app.Application;
+import android.content.ContentResolver;
+import android.content.Context;
+import android.net.Uri;
+import android.util.Log;
+
+import com.topjohnwu.magisk.utils.DynamicClassLoader;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.util.HashMap;
+
+public class InjectAPK {
+
+    static DelegateComponentFactory factory;
+
+    static Application setup(Context context) {
+        File apk = DynAPK.current(context);
+        File update = DynAPK.update(context);
+        if (update.exists())
+            update.renameTo(apk);
+        Application delegate = null;
+        if (!apk.exists()) {
+            // Try copying APK
+            Uri uri = new Uri.Builder().scheme("content")
+                    .authority("com.topjohnwu.magisk.provider")
+                    .encodedPath("apk_file").build();
+            ContentResolver resolver = context.getContentResolver();
+            try (InputStream is = resolver.openInputStream(uri)) {
+                if (is != null) {
+                    try (OutputStream out = new FileOutputStream(apk)) {
+                        byte[] buf = new byte[4096];
+                        for (int read; (read = is.read(buf)) >= 0;) {
+                            out.write(buf, 0, read);
+                        }
+                    }
+                }
+            } catch (Exception e) {
+                Log.e(InjectAPK.class.getSimpleName(), "", e);
+            }
+        }
+        if (apk.exists()) {
+            ClassLoader cl = new DynamicClassLoader(apk, factory.loader);
+            try {
+                // Create the delegate AppComponentFactory
+                AppComponentFactory df = (AppComponentFactory)
+                        cl.loadClass("androidx.core.app.CoreComponentFactory").newInstance();
+
+                // Create the delegate Application
+                delegate = (Application) cl.loadClass("a.e").getConstructor(Object.class)
+                        .newInstance(DynAPK.pack(dynData()));
+
+                // If everything went well, set our loader and delegate
+                factory.delegate = df;
+                factory.loader = cl;
+            } catch (Exception e) {
+                Log.e(InjectAPK.class.getSimpleName(), "", e);
+                apk.delete();
+            }
+        }
+        return delegate;
+    }
+
+    private static DynAPK.Data dynData() {
+        DynAPK.Data data = new DynAPK.Data();
+        data.version = BuildConfig.STUB_VERSION;
+        // Public source code does not do component name obfuscation
+        data.classToComponent = new HashMap<>();
+        return data;
+    }
+
+}