Eliminate any traces of Java in app

app/proguard-rules.pro

@@ -17,9 +17,9 @@
 #}
 
 # Snet
--keepclassmembers class com.topjohnwu.magisk.utils.ISafetyNetHelper { *; }
--keep,allowobfuscation interface com.topjohnwu.magisk.utils.ISafetyNetHelper$Callback
--keepclassmembers class * implements com.topjohnwu.magisk.utils.ISafetyNetHelper$Callback {
+-keepclassmembers class com.topjohnwu.magisk.utils.SafetyNetHelper { *; }
+-keep,allowobfuscation interface com.topjohnwu.magisk.utils.SafetyNetHelper$Callback
+-keepclassmembers class * implements com.topjohnwu.magisk.utils.SafetyNetHelper$Callback {
   void onResponse(int);
 }
 

app/src/main/java/a/w.java

@@ -2,14 +2,14 @@ package a;
 
 import android.content.Context;
 
-import com.topjohnwu.magisk.model.worker.DelegateWorker;
-
-import java.lang.reflect.ParameterizedType;
-
 import androidx.annotation.NonNull;
 import androidx.work.Worker;
 import androidx.work.WorkerParameters;
 
+import com.topjohnwu.magisk.model.worker.DelegateWorker;
+
+import java.lang.reflect.ParameterizedType;
+
 public abstract class w<T extends DelegateWorker> extends Worker {
 
     /* Wrapper class to workaround Proguard -keep class * extends Worker */
@@ -22,7 +22,7 @@ public abstract class w<T extends DelegateWorker> extends Worker {
         try {
             base = ((Class<T>) ((ParameterizedType) getClass().getGenericSuperclass())
                     .getActualTypeArguments()[0]).newInstance();
-            base.setActualWorker(this);
+            base.attachWorker(this);
         } catch (Exception ignored) {}
     }
 

app/src/main/java/com/topjohnwu/magisk/ClassMap.kt

@@ -20,7 +20,6 @@ object ClassMap {
         SuRequestActivity::class.java to a.m::class.java
     )
 
-    @JvmStatic
     operator fun <T : Class<*>>get(c: Class<*>): T {
         return map.getOrElse(c) { throw IllegalArgumentException() } as T
     }

app/src/main/java/com/topjohnwu/magisk/Config.kt

@@ -113,7 +113,6 @@ object Config : PreferenceModel, DBConfig {
     var darkTheme by preference(Key.DARK_THEME, true)
     var suReAuth by preference(Key.SU_REAUTH, false)
     var checkUpdate by preference(Key.CHECK_UPDATES, true)
-    @JvmStatic
     var magiskHide by preference(Key.MAGISKHIDE, true)
     var coreOnly by preference(Key.COREONLY, false)
     var showSystemApp by preference(Key.SHOW_SYSTEM_APP, false)

app/src/main/java/com/topjohnwu/magisk/Info.java

@@ -1,31 +0,0 @@
-package com.topjohnwu.magisk;
-
-import androidx.annotation.NonNull;
-
-import com.topjohnwu.magisk.model.entity.UpdateInfo;
-import com.topjohnwu.superuser.Shell;
-import com.topjohnwu.superuser.ShellUtils;
-
-public final class Info {
-
-    public static int magiskVersionCode = -1;
-
-    @NonNull
-    public static String magiskVersionString = "";
-
-    @NonNull
-    public static UpdateInfo remote = new UpdateInfo();
-
-    public static boolean keepVerity = false;
-    public static boolean keepEnc = false;
-    public static boolean recovery = false;
-
-    public static void loadMagiskInfo() {
-        try {
-            magiskVersionString = ShellUtils.fastCmd("magisk -v").split(":")[0];
-            magiskVersionCode = Integer.parseInt(ShellUtils.fastCmd("magisk -V"));
-            Config.setMagiskHide(Shell.su("magiskhide --status").exec().isSuccess());
-        } catch (NumberFormatException ignored) {
-        }
-    }
-}

app/src/main/java/com/topjohnwu/magisk/Info.kt

@@ -0,0 +1,26 @@
+package com.topjohnwu.magisk
+
+import com.topjohnwu.magisk.model.entity.UpdateInfo
+import com.topjohnwu.superuser.Shell
+import com.topjohnwu.superuser.ShellUtils
+
+object Info {
+
+    var magiskVersionCode = -1
+
+    var magiskVersionString = ""
+
+    var remote = UpdateInfo()
+
+    var keepVerity = false
+    var keepEnc = false
+    var recovery = false
+
+    fun loadMagiskInfo() {
+        runCatching {
+            magiskVersionString = ShellUtils.fastCmd("magisk -v").split(":".toRegex())[0]
+            magiskVersionCode = ShellUtils.fastCmd("magisk -V").toInt()
+            Config.magiskHide = Shell.su("magiskhide --status").exec().isSuccess
+        }
+    }
+}

app/src/main/java/com/topjohnwu/magisk/model/worker/DelegateWorker.java

@@ -1,84 +0,0 @@
-package com.topjohnwu.magisk.model.worker;
-
-import android.content.Context;
-import android.net.Network;
-import android.net.Uri;
-
-import androidx.annotation.MainThread;
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-import androidx.annotation.RequiresApi;
-import androidx.work.Data;
-import androidx.work.ListenableWorker;
-
-import com.google.common.util.concurrent.ListenableFuture;
-
-import java.util.List;
-import java.util.Set;
-import java.util.UUID;
-
-public abstract class DelegateWorker {
-
-    private ListenableWorker worker;
-
-    @NonNull
-    public abstract ListenableWorker.Result doWork();
-
-    public void onStopped() {}
-
-    public void setActualWorker(ListenableWorker w) {
-        worker = w;
-    }
-
-    @NonNull
-    public Context getApplicationContext() {
-        return worker.getApplicationContext();
-    }
-
-    @NonNull
-    public UUID getId() {
-        return worker.getId();
-    }
-
-    @NonNull
-    public Data getInputData() {
-        return worker.getInputData();
-    }
-
-    @NonNull
-    public Set<String> getTags() {
-        return worker.getTags();
-    }
-
-    @NonNull
-    @RequiresApi(24)
-    public List<Uri> getTriggeredContentUris() {
-        return worker.getTriggeredContentUris();
-    }
-
-    @NonNull
-    @RequiresApi(24)
-    public List<String> getTriggeredContentAuthorities() {
-        return worker.getTriggeredContentAuthorities();
-    }
-
-    @Nullable
-    @RequiresApi(28)
-    public Network getNetwork() {
-        return worker.getNetwork();
-    }
-
-    public int getRunAttemptCount() {
-        return worker.getRunAttemptCount();
-    }
-
-    @NonNull
-    @MainThread
-    public ListenableFuture<ListenableWorker.Result> startWork() {
-        return worker.startWork();
-    }
-
-    public boolean isStopped() {
-        return worker.isStopped();
-    }
-}

app/src/main/java/com/topjohnwu/magisk/model/worker/DelegateWorker.kt

@@ -0,0 +1,59 @@
+package com.topjohnwu.magisk.model.worker
+
+import android.content.Context
+import android.net.Network
+import android.net.Uri
+import androidx.annotation.MainThread
+import androidx.annotation.RequiresApi
+import androidx.work.Data
+import androidx.work.ListenableWorker
+import com.google.common.util.concurrent.ListenableFuture
+import java.util.*
+
+abstract class DelegateWorker {
+
+    private lateinit var worker: ListenableWorker
+
+    val applicationContext: Context
+        get() = worker.applicationContext
+
+    val id: UUID
+        get() = worker.id
+
+    val inputData: Data
+        get() = worker.inputData
+
+    val tags: Set<String>
+        get() = worker.tags
+
+    val triggeredContentUris: List<Uri>
+        @RequiresApi(24)
+        get() = worker.triggeredContentUris
+
+    val triggeredContentAuthorities: List<String>
+        @RequiresApi(24)
+        get() = worker.triggeredContentAuthorities
+
+    val network: Network?
+        @RequiresApi(28)
+        get() = worker.network
+
+    val runAttemptCount: Int
+        get() = worker.runAttemptCount
+
+    val isStopped: Boolean
+        get() = worker.isStopped
+
+    abstract fun doWork(): ListenableWorker.Result
+
+    fun onStopped() {}
+
+    fun attachWorker(w: ListenableWorker) {
+        worker = w
+    }
+
+    @MainThread
+    fun startWork(): ListenableFuture<ListenableWorker.Result> {
+        return worker.startWork()
+    }
+}

app/src/main/java/com/topjohnwu/magisk/ui/home/HomeFragment.kt

@@ -17,8 +17,8 @@ import com.topjohnwu.magisk.extensions.writeTo
 import com.topjohnwu.magisk.model.events.*
 import com.topjohnwu.magisk.ui.base.MagiskActivity
 import com.topjohnwu.magisk.ui.base.MagiskFragment
-import com.topjohnwu.magisk.utils.ISafetyNetHelper
 import com.topjohnwu.magisk.utils.DynamicClassLoader
+import com.topjohnwu.magisk.utils.SafetyNetHelper
 import com.topjohnwu.magisk.view.MarkDownWindow
 import com.topjohnwu.magisk.view.dialogs.*
 import com.topjohnwu.superuser.Shell
@@ -26,7 +26,7 @@ import org.koin.androidx.viewmodel.ext.android.viewModel
 import java.io.File
 
 class HomeFragment : MagiskFragment<HomeViewModel, FragmentMagiskBinding>(),
-    ISafetyNetHelper.Callback {
+    SafetyNetHelper.Callback {
 
     override val layoutRes: Int = R.layout.fragment_magisk
     override val viewModel: HomeViewModel by viewModel()
@@ -101,8 +101,8 @@ class HomeFragment : MagiskFragment<HomeViewModel, FragmentMagiskBinding>(),
             val clazz = loader.loadClass("com.topjohnwu.snet.Snet")
             val helper = clazz.getMethod("newHelper",
                     Class::class.java, String::class.java, Activity::class.java, Any::class.java)
-                    .invoke(null, ISafetyNetHelper::class.java, EXT_APK.path,
-                            requireActivity(), this) as ISafetyNetHelper
+                    .invoke(null, SafetyNetHelper::class.java, EXT_APK.path,
+                            activity, this) as SafetyNetHelper
             if (helper.version < Const.SNET_EXT_VER)
                 throw Exception()
             helper.attest()

app/src/main/java/com/topjohnwu/magisk/ui/home/HomeViewModel.kt

@@ -12,7 +12,7 @@ import com.topjohnwu.magisk.extensions.toggle
 import com.topjohnwu.magisk.model.events.*
 import com.topjohnwu.magisk.model.observer.Observer
 import com.topjohnwu.magisk.ui.base.MagiskViewModel
-import com.topjohnwu.magisk.utils.ISafetyNetHelper
+import com.topjohnwu.magisk.utils.SafetyNetHelper
 import com.topjohnwu.superuser.Shell
 
 enum class SafetyNetState {
@@ -142,8 +142,8 @@ class HomeViewModel(
 
     fun finishSafetyNetCheck(response: Int) = when {
         response and 0x0F == 0 -> {
-            val hasCtsPassed = response and ISafetyNetHelper.CTS_PASS != 0
-            val hasBasicIntegrityPassed = response and ISafetyNetHelper.BASIC_PASS != 0
+            val hasCtsPassed = response and SafetyNetHelper.CTS_PASS != 0
+            val hasBasicIntegrityPassed = response and SafetyNetHelper.BASIC_PASS != 0
             safetyNetTitle.value = R.string.safetyNet_check_success
             ctsState.value = if (hasCtsPassed) {
                 SafetyNetState.PASS
@@ -164,7 +164,7 @@ class HomeViewModel(
             ctsState.value = SafetyNetState.IDLE
             basicIntegrityState.value = SafetyNetState.IDLE
             safetyNetTitle.value = when (response) {
-                ISafetyNetHelper.RESPONSE_ERR -> R.string.safetyNet_res_invalid
+                SafetyNetHelper.RESPONSE_ERR -> R.string.safetyNet_res_invalid
                 else -> R.string.safetyNet_api_error
             }
         }

app/src/main/java/com/topjohnwu/magisk/utils/ISafetyNetHelper.java

@@ -1,18 +0,0 @@
-package com.topjohnwu.magisk.utils;
-
-public interface ISafetyNetHelper {
-
-    int RESPONSE_ERR = 0x01;
-    int CONNECTION_FAIL = 0x02;
-
-    int BASIC_PASS = 0x10;
-    int CTS_PASS = 0x20;
-
-    void attest();
-
-    int getVersion();
-
-    interface Callback {
-        void onResponse(int responseCode);
-    }
-}

app/src/main/java/com/topjohnwu/magisk/utils/SafetyNetHelper.kt

@@ -0,0 +1,21 @@
+package com.topjohnwu.magisk.utils
+
+interface SafetyNetHelper {
+
+    val version: Int
+
+    fun attest()
+
+    interface Callback {
+        fun onResponse(responseCode: Int)
+    }
+
+    companion object {
+
+        val RESPONSE_ERR = 0x01
+        val CONNECTION_FAIL = 0x02
+
+        val BASIC_PASS = 0x10
+        val CTS_PASS = 0x20
+    }
+}

app/src/main/java/com/topjohnwu/magisk/utils/SuConnector.java

@@ -1,61 +0,0 @@
-package com.topjohnwu.magisk.utils;
-
-import android.net.LocalSocket;
-import android.net.LocalSocketAddress;
-import android.os.Bundle;
-import android.text.TextUtils;
-
-import java.io.BufferedInputStream;
-import java.io.BufferedOutputStream;
-import java.io.DataInputStream;
-import java.io.DataOutputStream;
-import java.io.IOException;
-
-public abstract class SuConnector {
-
-    private LocalSocket socket;
-    protected DataOutputStream out;
-    protected DataInputStream in;
-
-    protected SuConnector(String name) throws IOException {
-        socket = new LocalSocket();
-        socket.connect(new LocalSocketAddress(name, LocalSocketAddress.Namespace.ABSTRACT));
-        out = new DataOutputStream(new BufferedOutputStream(socket.getOutputStream()));
-        in = new DataInputStream(new BufferedInputStream(socket.getInputStream()));
-    }
-
-    private String readString() throws IOException {
-        int len = in.readInt();
-        byte[] buf = new byte[len];
-        in.readFully(buf);
-        return new String(buf, "UTF-8");
-    }
-
-    public Bundle readSocketInput() throws IOException {
-        Bundle bundle = new Bundle();
-        while (true) {
-            String name = readString();
-            if (TextUtils.equals(name, "eof"))
-                break;
-            bundle.putString(name, readString());
-        }
-        return bundle;
-    }
-
-    public void response() {
-        try {
-            onResponse();
-            out.flush();
-        } catch (IOException e) {
-            e.printStackTrace();
-        }
-        try {
-            in.close();
-            out.close();
-            socket.close();
-        } catch (IOException ignored) { }
-    }
-
-    protected abstract void onResponse() throws IOException;
-
-}

app/src/main/java/com/topjohnwu/magisk/utils/SuConnector.kt

@@ -0,0 +1,60 @@
+package com.topjohnwu.magisk.utils
+
+import android.net.LocalSocket
+import android.net.LocalSocketAddress
+import android.os.Bundle
+import android.text.TextUtils
+import timber.log.Timber
+import java.io.*
+import java.nio.charset.Charset
+
+abstract class SuConnector @Throws(IOException::class)
+protected constructor(name: String) {
+
+    private val socket: LocalSocket = LocalSocket()
+    protected var out: DataOutputStream
+    protected var input: DataInputStream
+
+    init {
+        socket.connect(LocalSocketAddress(name, LocalSocketAddress.Namespace.ABSTRACT))
+        out = DataOutputStream(BufferedOutputStream(socket.outputStream))
+        input = DataInputStream(BufferedInputStream(socket.inputStream))
+    }
+
+    @Throws(IOException::class)
+    private fun readString(): String {
+        val len = input.readInt()
+        val buf = ByteArray(len)
+        input.readFully(buf)
+        return String(buf, Charset.forName("UTF-8"))
+    }
+
+    @Throws(IOException::class)
+    fun readSocketInput(): Bundle {
+        val bundle = Bundle()
+        while (true) {
+            val name = readString()
+            if (TextUtils.equals(name, "eof"))
+                break
+            bundle.putString(name, readString())
+        }
+        return bundle
+    }
+
+    fun response() {
+        runCatching {
+            onResponse()
+            out.flush()
+        }.onFailure { Timber.e(it) }
+
+        runCatching {
+            input.close()
+            out.close()
+            socket.close()
+        }
+    }
+
+    @Throws(IOException::class)
+    protected abstract fun onResponse()
+
+}