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Code Issues Packages Projects Releases 1 Wiki Activity

Support stub APK loading down to Android 5.0

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This commit is contained in:
topjohnwu
2021-01-26 03:40:25 -08:00
parent f1295cb7d6
commit fba83e2330
11 changed files with 141 additions and 116 deletions
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stub/src/main/java/com/topjohnwu/magisk/InjectAPK.java
+54 -22
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@@ -4,65 +4,97 @@ import android.app.AppComponentFactory;
import android.app.Application;
import android.content.ContentResolver;
import android.content.Context;
import android.content.ContextWrapper;
import android.net.Uri;
import android.os.Build;
import android.util.Log;
import com.topjohnwu.magisk.utils.DynamicClassLoader;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.reflect.Field;
public class InjectAPK {
static DelegateComponentFactory factory;
@SuppressWarnings("ResultOfMethodCallIgnored")
static Application setup(Context context) {
// Get ContextImpl
while (context instanceof ContextWrapper) {
context = ((ContextWrapper) context).getBaseContext();
}
File apk = DynAPK.current(context);
File update = DynAPK.update(context);
if (update.exists())
update.renameTo(apk);
Application delegate = null;
Application result = 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 (InputStream src = resolver.openInputStream(uri)) {
if (src != null) {
try (OutputStream out = new FileOutputStream(apk)) {
byte[] buf = new byte[4096];
for (int read; (read = is.read(buf)) >= 0;) {
for (int read; (read = src.read(buf)) >= 0;) {
out.write(buf, 0, read);
}
}
}
} catch (Exception e) {
Log.e(InjectAPK.class.getSimpleName(), "", e);
}
} catch (Exception ignored) {}
}
if (apk.exists()) {
ClassLoader cl = new DynamicClassLoader(apk, factory.loader);
ClassLoader cl = new InjectedClassLoader(apk);
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)
// Create the receiver Application
Object app = cl.loadClass(Mapping.get("APP")).getConstructor(Object.class)
.newInstance(DynAPK.pack(dynData()));
// If everything went well, set our loader and delegate
factory.delegate = df;
factory.loader = cl;
// Create the receiver component factory
Object factory = null;
if (Build.VERSION.SDK_INT >= 28) {
factory = cl.loadClass(Mapping.get("ACF")).newInstance();
}
setClassLoader(context, cl);
// Finally, set variables
result = (Application) app;
if (Build.VERSION.SDK_INT >= 28) {
DelegateComponentFactory.INSTANCE.loader = cl;
DelegateComponentFactory.INSTANCE.receiver = (AppComponentFactory) factory;
}
} catch (Exception e) {
Log.e(InjectAPK.class.getSimpleName(), "", e);
apk.delete();
}
} else {
ClassLoader cl = new RedirectClassLoader();
try {
setClassLoader(context, cl);
if (Build.VERSION.SDK_INT >= 28) {
DelegateComponentFactory.INSTANCE.loader = cl;
}
} catch (Exception e) {
// Should never happen
Log.e(InjectAPK.class.getSimpleName(), "", e);
}
}
return delegate;
return result;
}
// Replace LoadedApk mClassLoader
private static void setClassLoader(Context impl, ClassLoader cl)
throws NoSuchFieldException, IllegalAccessException {
Field mInfo = impl.getClass().getDeclaredField("mPackageInfo");
mInfo.setAccessible(true);
Object loadedApk = mInfo.get(impl);
Field mcl = loadedApk.getClass().getDeclaredField("mClassLoader");
mcl.setAccessible(true);
mcl.set(loadedApk, cl);
}
private static DynAPK.Data dynData() {