kr328 / zygoteloader

A library for building Java only Zygisk/Riru modules.

Zygote Loader

A library for building Java only Zygisk/Riru modules.

Getting Start

1. Add plugin repository to settings.gradle.kts

pluginManagement { 
    repositories { 
        // ... other repositories 
        maven(url = "https://maven.kr328.app/releases") 
    } 
}

2. Add an android application module and create entrypoint

class Entrypoint {
    // ZygoteLoader will invoke this method after injected to target process
    public static void main() {
        // ... your code
    }
}

3. Apply com.github.kr328.gradle.zygote plugin

plugins {
    id("com.android.application") // required
    id("com.github.kr328.gradle.zygote") version "3.1" // apply plugin
    // ... other plugins
}

4. Configure your module properties

zygote {
    // initial inject packages
    packages(ZygoteLoader.PACKAGE_SYSTEM_SERVER) // initial inject to system_server

    // riru related properties
    riru {
        id = "your module id"
        name = "your module name"
        author = "your name"
        description = "your module description"
        entrypoint = "your entrypoint class qualified name" // see also step 2
        archiveName = "generated zip archive name" // optional
        updateJson = "your updateJson property" // optional, see also https://topjohnwu.github.io/Magisk/guides.html#moduleprop
    }

    // zygisk related properties
    zygisk {
        // same with riru
    }
}

5. Build module

   1. Run gradle task <module>:assembleRelease

   2. Pick generated zip from <module>/build/outputs/magsisk

Examples

• Riru-ClipboardWhitelist

• Riru-IFWEnhance

zygoteloader's Issues

Load ClassLoader of a targer process.

I need an app to see classes from a custom framework file I have, and since the target application uses reflection to do this, I tough I could easily add the jar to the ClassLoader path of the application, but it seems that it might not be this easily?

I managed to load the framework, and call it with Class.forName, but my wrong understanding is that once I load it in my module it will also load it in the app which it wasn't the case. I'm lost on how could I retrieve the ClassLoader of the target app and then add it to it's path.

I was hoping I could get some help here.

Thanks!

    static void init() throws InvocationTargetException, NoSuchMethodException, IllegalAccessException, ClassNotFoundException {

        String NT_FRAMEWORK_PATH = "/system/framework/not-a-framework.jar";

        BaseDexClassLoader baseDexClassLoader = (BaseDexClassLoader) ClassLoader.getSystemClassLoader();

        Method method = HiddenApiBypass.getDeclaredMethod(BaseDexClassLoader.class, "addDexPath", String.class);
        method.setAccessible(true);
        method.invoke(baseDexClassLoader, NT_FRAMEWORK_PATH);

        // Test
        String testCls = "com.nothing.onlineconfig.ConfigObserver";
        Class<?> myClass = Class.forName(testCls);
        log(String.format("Class name: %s", myClass.getName()));
    }