密钥删除(ArkTS)
为保证数据安全性，当不需要使用该密钥时，应该删除密钥。
开发步骤
以删除HKDF256密钥为例。
- 确定密钥别名keyAlias，密钥别名最大长度为64字节。
- 初始化密钥属性集。用于删除时指定密钥的属性TAG，比如删除的密钥范围(全量/单个)，当删除单个时，TAG字段可传空。
- 调用接口[deleteKeyItem]，删除密钥。
- 开发前请熟悉鸿蒙开发指导文档：
gitee.com/li-shizhen-skin/harmony-os/blob/master/README.md点击或者复制转到。
/** 以下以HKDF256密钥的Promise操作使用为例*/
import { huks } from '@kit.UniversalKeystoreKit';/* 1.确定密钥别名 */
let keyAlias = "test_Key";
/* 2.构造空对象 */
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.删除密钥*/
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);
}
