使用文档3DES加解密中的API方法方法报错提示参数不合规

async function main() { 
  let keyData = new Uint8Array([238, 249, 61, 55, 128, 220, 183, 224, 139, 253, 248, 239, 239, 41, 71, 25, 235, 206, 230, 162, 249, 27, 234, 114]); 
  let symKey = await genSymKeyByData(keyData); 
  let message = "This is a test"; 
  let plainText: cryptoFramework.DataBlob = { data: new Uint8Array(buffer.from(message, 'utf-8').buffer) }; 
  let encryptText = await encryptMessagePromise(symKey, plainText); 
  let decryptText = await decryptMessagePromise(symKey, encryptText); 
  if (plainText.data.toString() === decryptText.data.toString()) { 
    console.info('decrypt ok'); 
    console.info('decrypt plainText: ' + buffer.from(decryptText.data).toString('utf-8')); 
  } else { 
    console.error('decrypt failed'); 
  } 
}