HarmonyOS 鸿蒙Next PKCS8EncodedKeySpec这个java类在ArkTS中有替代类吗

如果是需要根据提供的签名类型、内容和私钥来生成数字签名的话，在鸿蒙这边可以使用专门的加解密算法框架，参考文档链接：‘https://developer.huawei.com/consumer/cn/doc/harmonyos-guides-V13/crypto-architecture-kit-intro-V13’

然后代码的话可以参考这个：

import { cryptoFramework } from '[@kit](/user/kit).CryptoArchitectureKit';
import { buffer, util } from '[@kit](/user/kit).ArkTS';

[@Entry](/user/Entry)
[@Component](/user/Component)
struct RSAExample {
 async signMessagePromise(content: cryptoFramework.DataBlob, priKey: cryptoFramework.PriKey) {
   let signAlg = "RSA1024|PKCS1|SHA1"; // 签名算法规格
   let signer = cryptoFramework.createSign(signAlg);
   await signer.init(priKey);
   let signData = await signer.sign(content);
   return signData;
 }

 async verifyMessagePromise(content: cryptoFramework.DataBlob, signMessageBlob: cryptoFramework.DataBlob,
   pubKey: cryptoFramework.PubKey) {
   let verifyAlg = "RSA1024|PKCS1|SHA1"; // 签名算法规格
   let verifier = cryptoFramework.createVerify(verifyAlg);
   await verifier.init(pubKey);
   let res = await verifier.verify(content, signMessageBlob);
   console.info("verify result is " + res);
   return res;
 }

 async convertAsyKey() {
   let rsaGenerator = cryptoFramework.createAsyKeyGenerator('RSA1024');
   // 随机生成的公私钥对，Base64格式
   let pubKeyVal =
     "公钥";
   let priKeyVal =
     "私钥";

   let pkBlob: cryptoFramework.DataBlob = { data: this.stringToUnit8Array(pubKeyVal) };
   let prBlob: cryptoFramework.DataBlob = { data: this.stringToUnit8Array(priKeyVal) };

   rsaGenerator.convertKey(pkBlob, prBlob, async (err, keyPair) => {
     if (err) {
       console.error(`convertKey failed, ${err.code}, ${err.message}`);
       return;
     }
     console.info('convertKey success!');

     let plainText: string = "test";
     let res = await this.signMessagePromise({
       data: new Uint8Array(buffer.from(plainText, 'utf-8').buffer)
     }, keyPair.priKey)

     console.log("convertKey sign result:" + new util.Base64Helper().encodeToStringSync(res.data))

     let verifyResult = await this.verifyMessagePromise({
       data: new Uint8Array(buffer.from(plainText, 'utf-8').buffer)
     }, res, keyPair.pubKey);

     if (verifyResult == true) {
       console.info('convertKey verify success');
     } else {
       console.error('convertKey verify failed');
     }
   });
 }

 stringToUnit8Array(str: string): Uint8Array {
   return new util.Base64Helper().decodeSync(str)
 }

 build() {
   Button("获取信息").width(100).height(100)
     .onClick(() => {
       this.convertAsyKey()
     })
 }
}