HarmonyOS sha512能否直接对字符串进行hash，api是要求输入文本路径？

Question

代码如下：

let filePath = pathDir + "/test.txt";
hash.hash(filePath, "sha256").then((str: string) => {
  console.info("calculate file hash succeed:" + str);
}).catch((err: BusinessError) => {
  console.error("calculate file hash failed with error message: " + err.message + ", error code: " + err.code);
});

Answer 1

sha512 hash的摘要代码demo实例 如下

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 = 'SHA512'; // 摘要算法名
  // let message = 'mdTestMessgae'; // 待摘要的数据
  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(message, '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);
}