HarmonyOS java版本md5的32位加密，在ArkTS怎么写

参考demo：

import { cryptoFramework } from '@kit.CryptoArchitectureKit';
import { buffer, util } from '@kit.ArkTS';

@Entry
@Component
struct MD5Crypto {
  @State message: string = '点击开始';

  build() {
    Row() {
      Column() {
        Text(this.message)
          .fontSize(50)
          .fontWeight(FontWeight.Bold)
          .onClick(() => {
            doMdBySync("")
          })
      }
      .width('100%')
    }
    .height('100%')
  }
}
const base = new util.Base64Helper();
function doMdBySync(message:string) {
  let mdAlgName = 'SHA256'; // 摘要算法名
  let md = cryptoFramework.createMd(mdAlgName);
  // 数据量较少时，可以只做一次update，将数据全部传入，接口未对入参长度做限制
  md.updateSync({ data: new Uint8Array(buffer.from("xxxx", 'utf-8').buffer) });
  let mdResult = md.digestSync();
  console.info('[Sync]:Md result base64:' + base.encodeToStringSync(mdResult.data));
  console.info('Md result hex:' + buffer.from(mdResult.data).toString('hex'));
  let mdLen = md.getMdLength();
  console.info("md len: " + mdLen);
}