HarmonyOS 实现RSA加密功能

import cryptoFramework from "@ohos.security.cryptoFramework"; 
import { buffer } from '@kit.ArkTS'; 
import util from '@ohos.util'; 
 
async genRsaPubKey () { 
  //引入外部的公钥加密 
  const pubKey = "asdasd123231dsasdasd123123asdasd12312xxxxxxxxxxxxxxxxxxxxxxxxxxxx"; 
  //明文 
  const plaintext = '我是明文' 
  const base64 = new util.Base64Helper() 
  let publicKeyDataBlob: cryptoFramework.DataBlob = { data: base64.decodeSync(pubKey) }; 
  let asyKeyGenerator = cryptoFramework.createAsyKeyGenerator('RSA1024'); 
  let cipher = cryptoFramework.createCipher('RSA|ECB|PKCS1'); //创建一个 Cipher (解密)对象 
  let keyGenPromise: cryptoFramework.KeyPair = await asyKeyGenerator.convertKey(publicKeyDataBlob, null); 
  await cipher.init(cryptoFramework.CryptoMode.ENCRYPT_MODE, keyGenPromise.pubKey, null); 
  let put: cryptoFramework.DataBlob = { data: new Uint8Array(buffer.from(plaintext).buffer) }; 
  const finalRes = await cipher.doFinal(put) 
  console.log(`加密成功 ${finalRes.data}`) 
}