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topjohnwu
25c557248c
Previously, we use either BroadcastReceivers or Activities to receive messages from our native daemon, but both have their own downsides. Some OEMs blocks broadcasts if the app is not running in the background, regardless of who the caller is. Activities on the other hand, despite working 100% of the time, will steal the focus of the current foreground app, even though we are just doing some logging and showing a toast. In addition, since stubs for hiding Magisk Manager is introduced, our only communication method is left with the broadcast option, as only broadcasting allows targeting a specific package name, not a component name (which will be obfuscated in the case of stubs). To make sure root requests will work on all devices, Magisk had to do some experiments every boot to test whether broadcast is deliverable or not. This makes the whole thing even more complicated then ever. So lets take a look at another kind of component in Android apps: ContentProviders. It is a vital part of Android's ecosystem, and as far as I know no OEMs will block requests to ContentProviders (or else tons of functionality will break catastrophically). Starting at API 11, the system supports calling a specific method in ContentProviders, optionally sending extra data along with the method call. This is perfect for the native daemon to start a communication with Magisk Manager. Another cool thing is that we no longer need to know the component name of the reciever, as ContentProviders identify themselves with an "authority" name, which in Magisk Manager's case is tied to the package name. We already have a mechanism to keep track of our current manager package name, so this works out of the box. So yay! No more flaky broadcast tests, no more stupid OEMs blocking broadcasts for some bizzare reasons. This method should in theory work on almost all devices and situations.
88 lines
2.8 KiB
Kotlin
88 lines
2.8 KiB
Kotlin
package com.topjohnwu.magisk
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import android.app.Application
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import android.content.Context
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import android.content.res.Configuration
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import androidx.appcompat.app.AppCompatDelegate
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import androidx.multidex.MultiDex
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import androidx.room.Room
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import androidx.work.WorkManager
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import androidx.work.impl.WorkDatabase
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import androidx.work.impl.WorkDatabase_Impl
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import com.topjohnwu.magisk.data.database.RepoDatabase
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import com.topjohnwu.magisk.data.database.RepoDatabase_Impl
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import com.topjohnwu.magisk.di.ActivityTracker
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import com.topjohnwu.magisk.di.koinModules
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import com.topjohnwu.magisk.extensions.get
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import com.topjohnwu.magisk.extensions.unwrap
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import com.topjohnwu.magisk.utils.RootInit
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import com.topjohnwu.magisk.utils.SuHandler
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import com.topjohnwu.magisk.utils.updateConfig
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import com.topjohnwu.superuser.Shell
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import org.koin.android.ext.koin.androidContext
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import org.koin.core.context.startKoin
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import timber.log.Timber
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open class App() : Application() {
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constructor(o: Any) : this() {
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Info.stub = DynAPK.load(o)
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}
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init {
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AppCompatDelegate.setCompatVectorFromResourcesEnabled(true)
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Shell.Config.setFlags(Shell.FLAG_MOUNT_MASTER or Shell.FLAG_USE_MAGISK_BUSYBOX)
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Shell.Config.verboseLogging(BuildConfig.DEBUG)
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Shell.Config.addInitializers(RootInit::class.java)
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Shell.Config.setTimeout(2)
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FileProvider.callHandler = SuHandler
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Room.setFactory {
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when (it) {
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WorkDatabase::class.java -> WorkDatabase_Impl()
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RepoDatabase::class.java -> RepoDatabase_Impl()
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else -> null
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}
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}
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}
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override fun attachBaseContext(base: Context) {
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// Basic setup
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if (BuildConfig.DEBUG)
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MultiDex.install(base)
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Timber.plant(Timber.DebugTree())
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// Some context magic
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val app: Application
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val impl: Context
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if (base is Application) {
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app = base
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impl = base.baseContext
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} else {
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app = this
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impl = base
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}
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val wrapped = impl.wrap()
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super.attachBaseContext(wrapped)
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// Normal startup
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startKoin {
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androidContext(wrapped)
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modules(koinModules)
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}
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ResourceMgr.init(impl)
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app.registerActivityLifecycleCallbacks(get<ActivityTracker>())
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WorkManager.initialize(impl.wrapJob(), androidx.work.Configuration.Builder().build())
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}
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// This is required as some platforms expect ContextImpl
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override fun getBaseContext(): Context {
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return super.getBaseContext().unwrap()
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}
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override fun onConfigurationChanged(newConfig: Configuration) {
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resources.updateConfig(newConfig)
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if (!isRunningAsStub)
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super.onConfigurationChanged(newConfig)
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}
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}
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