CommNotificationsHandler.java

  @Override
  public void onMessageReceived(RemoteMessage message) {
    try {
      AESCryptoModuleCompat obj = new AESCryptoModuleCompat();
      byte[] key = obj.generateKey();

      String plaintext = "test_data!";
      byte[] sealedData =
          obj.encrypt(key, plaintext.getBytes(StandardCharsets.UTF_8));

      String decrypted =
          new String(obj.decrypt(key, sealedData), StandardCharsets.UTF_8);
      Log.w("COMM", "Decrypted text: " + decrypted);
    } catch (Exception e) {
      Log.w(
          "COMM",
          "Failed to run generate key -> encrypt -> decrypt sequence.",
          e);
    }
    // ...omitted in gist...
 }

gistfile1.txt

import * as AES from '../utils/aes-crypto-module.js';
const key = AES.generateKey();
const plaintext = new Uint8Array([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
const sealedData = AES.encrypt(key, plaintext);
const plaintext2 = AES.decrypt(key, sealedData);
console.log(`
key: ${key.toString()}
plaintext: ${plaintext.toString()}
sealedData: ${sealedData.toString()}
plaintext2: ${plaintext2.toString()}
`);