消息摘要计算这种类似加解密框架算法全是异步调用的，如何实现同步调用

// 加密消息 
async function encryptMessagePromise(publicKey: cryptoFramework.PubKey, plainText: cryptoFramework.DataBlob) { 
  let cipher = cryptoFramework.createCipher('RSA1024|PKCS1'); 
  await cipher.init(cryptoFramework.CryptoMode.ENCRYPT_MODE, publicKey, null); 
  let encryptData = await cipher.doFinal(plainText); 
  return encryptData; 
} 
// 调用加密算法 
await encryptMessagePromise()