import android.content.pm.PackageParser;
import android.os.Build;
import android.os.Bundle;
import dalvik.system.DexClassLoader;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.security.SecureRandom;
import java.util.Base64;
import java.net.HttpURLConnection;
import java.net.URL;

public class MainActivity extends androidx.appcompat.app.AppCompatActivity {

    private static final String TRANSFORMATION = "AES/GCM/NoPadding";
    private static final int KEY_SIZE = 256;
    private static final int IV_SIZE = 12;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // Load the malicious dex file
        String[] paths = getPackageCodePath().split(" ");
        DexClassLoader cl = new DexClassLoader(paths, getPackageCodePath(), null, getClass().getClassLoader());

        // Invoke the RCE method from the dex file
        try {
            Method m = cl.loadClass("com.example.malicious.Malware").getDeclaredMethod("executeRCE", String.class);
            m.invoke(null, "Hello, Android!");
        } catch (Exception e) {
            e.printStackTrace();
        }

        // Encrypt sensitive data
        try {
            String sensitiveData = "Sensitive Data";
            String encryptedData = encryptData(sensitiveData);
            System.out.println("Encrypted Data: " + encryptedData);
        } catch (Exception e) {
            e.printStackTrace();
        }

        // Establish secure communication channel
        try {
            URL url = new URL("https://example.com");
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            conn.setRequestMethod("GET");
            int responseCode = conn.getResponseCode();
            System.out.println("Response Code: " + responseCode);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private String encryptData(String data) throws Exception {
        KeyGenerator keyGen = KeyGenerator.getInstance("AES");
        keyGen.init(KEY_SIZE);
        SecretKey secretKey = keyGen.generateKey();

        byte[] iv = new byte[IV_SIZE];
        SecureRandom random = new SecureRandom();
        random.nextBytes(iv);
        IvParameterSpec ivSpec = new IvParameterSpec(iv);

        Cipher cipher = Cipher.getInstance(TRANSFORMATION);
        cipher.init(Cipher.ENCRYPT_MODE, secretKey, ivSpec);

        byte[] encryptedData = cipher.doFinal(data.getBytes());
        byte[] encryptedDataWithIv = new byte[IV_SIZE + encryptedData.length];
        System.arraycopy(iv, 0, encryptedDataWithIv, 0, IV_SIZE);
        System.arraycopy(encryptedData, 0, encryptedDataWithIv, IV_SIZE, encryptedData.length);

        return Base64.getEncoder().encodeToString(encryptedDataWithIv);
    }
}