warn user if root before starting geth

android/app/src/main/java/com/statusim/MainActivity.java

@@ -8,6 +8,10 @@ import com.facebook.react.shell.MainReactPackage;
 import com.rt2zz.reactnativecontacts.ReactNativeContacts;
 import android.os.Bundle;
 import android.os.Environment;
+import android.app.AlertDialog;
+import android.content.DialogInterface;
+import android.content.DialogInterface.OnClickListener;
+import android.content.DialogInterface.OnCancelListener;
 import com.github.ethereum.go_ethereum.cmd.Geth;
 import com.bitgo.randombytes.RandomBytesPackage;
 import com.BV.LinearGradient.LinearGradientPackage;
@@ -18,20 +22,20 @@ import java.util.List;
 import java.util.Properties;
 import java.io.File;
 
+
 import com.i18n.reactnativei18n.ReactNativeI18n;
 import io.realm.react.RealmReactPackage;
 
+
 public class MainActivity extends ReactActivity {
 
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
 
+    protected void startStatus() {
         // Required for android-16 (???)
         System.loadLibrary("gethraw");
         System.loadLibrary("geth");
 
-        // Required because of crazy APN settings redirecting localhost
+        // Required because of crazy APN settings redirecting localhost (found in GB)
         Properties properties = System.getProperties();
         properties.setProperty("http.nonProxyHosts", "localhost|127.0.0.1");
         properties.setProperty("https.nonProxyHosts", "localhost|127.0.0.1");
@@ -50,6 +54,38 @@ public class MainActivity extends ReactActivity {
         }).start();
     }
 
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        if(!RootUtil.isDeviceRooted()) {
+            startStatus();
+        } else {
+            AlertDialog dialog = new AlertDialog.Builder(MainActivity.this).setMessage(getResources().getString(R.string.root_warning))
+                    .setPositiveButton(getResources().getString(R.string.root_okay), new OnClickListener() {
+                        @Override
+                        public void onClick(DialogInterface dialog, int which) {
+                            dialog.dismiss();
+                            startStatus();
+                        }
+                    }).setNegativeButton(getResources().getString(R.string.root_cancel), new OnClickListener() {
+                        @Override
+                        public void onClick(DialogInterface dialog, int which) {
+                            dialog.dismiss();
+                            MainActivity.this.finishAffinity();
+                        }
+                    }).setOnCancelListener(new OnCancelListener() {
+                        @Override
+                        public void onCancel(DialogInterface dialog) {
+                            dialog.dismiss();
+                            MainActivity.this.finishAffinity();
+                        }
+                    }).create();
+            dialog.show();
+        }
+
+    }
+
     /**
      * Returns the name of the main component registered from JavaScript.
      * This is used to schedule rendering of the component.

android/app/src/main/java/com/statusim/RootUtil.java

@@ -0,0 +1,41 @@
+package com.statusim;
+
+import java.io.File;
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+
+/** @author Kevin Kowalewski */
+public class RootUtil {
+    
+    public static boolean isDeviceRooted() {
+        return checkRootMethod1() || checkRootMethod2() || checkRootMethod3();
+    }
+
+    private static boolean checkRootMethod1() {
+        String buildTags = android.os.Build.TAGS;
+        return buildTags != null && buildTags.contains("test-keys");
+    }
+
+    private static boolean checkRootMethod2() {
+        String[] paths = { "/system/app/Superuser.apk", "/sbin/su", "/system/bin/su", "/system/xbin/su", "/data/local/xbin/su", "/data/local/bin/su", "/system/sd/xbin/su",
+                "/system/bin/failsafe/su", "/data/local/su" };
+        for (String path : paths) {
+            if (new File(path).exists()) return true;
+        }
+        return false;
+    }
+
+    private static boolean checkRootMethod3() {
+        Process process = null;
+        try {
+            process = Runtime.getRuntime().exec(new String[] { "/system/xbin/which", "su" });
+            BufferedReader in = new BufferedReader(new InputStreamReader(process.getInputStream()));
+            if (in.readLine() != null) return true;
+            return false;
+        } catch (Throwable t) {
+            return false;
+        } finally {
+            if (process != null) process.destroy();
+        }
+    }
+}

android/app/src/main/res/values/strings.xml

@@ -1,3 +1,6 @@
 <resources>
-    <string name="app_name">StatusIm</string>
+    <string name="app_name">Status</string>
-</resources>
+    <string name="root_warning">Your phone appears to be ROOTED, this is a serious security concern, continue only if you understand and accept the risks.</string>
+    <string name="root_okay">Continue</string>
+    <string name="root_cancel">Exit</string>
+</resources>