参数做aes解密会失败，是哪里参数配置不对吗，分段解密和一次性解密都试了？

// 加密消息 
async function encryptMessagePromise(symKey: cryptoFramework.SymKey, plainText: cryptoFramework.DataBlob) { 
  let cipher = cryptoFramework.createCipher('AES128|GCM|PKCS7'); 
  await cipher.init(cryptoFramework.CryptoMode.ENCRYPT_MODE, symKey, gcmParams); 
  let encryptUpdate = await cipher.update(plainText); 
  // gcm模式加密doFinal时传入空，获得tag数据，并更新至gcmParams对象中。 
  gcmParams.authTag = await cipher.doFinal(null); 
  return encryptUpdate; 
} 
// 解密消息 
async function decryptMessagePromise(symKey: cryptoFramework.SymKey, cipherText: cryptoFramework.DataBlob) { 
  let decoder = cryptoFramework.createCipher('AES128|GCM|PKCS7'); 
  await decoder.init(cryptoFramework.CryptoMode.DECRYPT_MODE, symKey, gcmParams); 
  let decryptUpdate = await decoder.update(cipherText); 
  // gcm模式解密doFinal时传入空，验证init时传入的tag数据，如果验证失败会抛出异常。 
  let decryptData = await decoder.doFinal(null); 
  if (decryptData == null) { 
    console.info('GCM decrypt success, decryptData is null'); 
  } 
  return decryptUpdate; 
}