I'm moving from React Native to Flutter/Dart. I have the following code snippet from React Native's typescript:

import CryptoJS from 'crypto-js';

export const decryptSessionKey = (randomKey: string, cipher: string) => {
  const iv = randomKey ? randomKey.slice(0, 16) : '';
  const decrypted = CryptoJS.AES.decrypt(
    cipher,
    CryptoJS.enc.Utf8.parse(randomKey),
    {
      iv: CryptoJS.enc.Utf8.parse(iv),
      mode: CryptoJS.mode.CTR,
      padding: CryptoJS.pad.NoPadding,
    },
  );
  return decrypted.toString(CryptoJS.enc.Utf8);
};

And I moved those code to flutter/dart as:

import 'dart:math';
import 'package:encrypt/encrypt.dart';

String decryptSessionKey(String randomKey, String cipher) {
  final encrypter = Encrypter(AES(Key.fromUtf8(randomKey), mode: AESMode.ctr, padding: null));
  var iv = randomKey.substring(0, 16);
  final decrypted =
      encrypter.decrypt(Encrypted.fromUtf8(cipher), iv: IV.fromUtf8(iv));
  return decrypted.toString();
}

Given the randomKey as 0QaOUmxpugtnRUTZ6yOSxQeZq47Akiqf, and the cipher as piMgUF2ISUl/g7ns2/gZyaWQm6Rdv7x500GD7lMLYxhy14Tg+Bizibvz. I would get the decrypted in Typescript as 54387c3b38150d2a7a1c545167736e701629382648.

However, in Flutter, I got an unreadable string such as ��ʋ�ͻh�0�M��R�Z���YInCXTI*��!�\��-S�f��/�SU��'

Is there something I'm missing? Thank you in advance!