encrypt method

Implementation

@override
Future<EncryptResult> encrypt(
    String key, String iv, String adata, String pt, int tagLength) async {
  final result =
      await _methodChannel.invokeMethod<Map<dynamic, dynamic>>('encrypt', {
    'key': key,
    'iv': iv,
    'adata': adata,
    'pt': pt,
    'tagLength': tagLength,
  });
  if (result == null ||
      result["cipherText"] == null ||
      result["authTag"] == null) {
    throw PlatformException(
        code: "encrypt(): error retrieving EncryptResult");
  }
  return EncryptResult(result["cipherText"], result["authTag"]);
}