密鑰刪除(ArkTS)

為保證數(shù)據(jù)安全性，當(dāng)不需要使用該密鑰時(shí)，應(yīng)該刪除密鑰。

開(kāi)發(fā)步驟

以刪除HKDF256密鑰為例。

1. 確定密鑰別名keyAlias，密鑰別名最大長(zhǎng)度為64字節(jié)。
2. 初始化密鑰屬性集。用于刪除時(shí)指定密鑰的屬性TAG，比如刪除的密鑰范圍(全量/單個(gè))，當(dāng)刪除單個(gè)時(shí)，TAG字段可傳空。
3. 調(diào)用接口[deleteKeyItem]，刪除密鑰。
4. 開(kāi)發(fā)前請(qǐng)熟悉鴻蒙開(kāi)發(fā)指導(dǎo)文檔 ：[gitee.com/li-shizhen-skin/harmony-os/blob/master/README.md]

/*
 * 以下以HKDF256密鑰的Promise操作使用為例
 */
import { huks } from '@kit.UniversalKeystoreKit';

/* 1.確定密鑰別名 */
let keyAlias = "test_Key";
/* 2.構(gòu)造空對(duì)象 */
let huksOptions: huks.HuksOptions = {
  properties: []
}

class throwObject {
  isThrow = false;
}

function deleteKeyItem(keyAlias: string, huksOptions: huks.HuksOptions, throwObject: throwObject) {
  return new Promise< void >((resolve, reject) = > {
    try {
      huks.deleteKeyItem(keyAlias, huksOptions, (error, data) = > {
        if (error) {
          reject(error);
        } else {
          resolve(data);
        }
      });
    } catch (error) {
      throwObject.isThrow = true;
      throw (error as Error);
    }
  });
}

/* 3.刪除密鑰*/
async function publicDeleteKeyFunc(keyAlias: string, huksOptions: huks.HuksOptions) {
  console.info(`enter promise deleteKeyItem`);
  let throwObject: throwObject = { isThrow: false };
  try {
    await deleteKeyItem(keyAlias, huksOptions, throwObject)
      .then((data) = > {
        console.info(`promise: deleteKeyItem key success, data = ${JSON.stringify(data)}`);
      })
      .catch((error: Error) = > {
        if (throwObject.isThrow) {
          throw (error as Error);
        } else {
          console.error(`promise: deleteKeyItem failed, ${JSON.stringify(error)}`);
        }
      });
  } catch (error) {
    console.error(`promise: deleteKeyItem input arg invalid, ${JSON.stringify(error)}`);
  }
}

async function testDerive() {
  await publicDeleteKeyFunc(keyAlias, huksOptions);
}

審核編輯 黃宇