HarmonyOS 鸿蒙Next RSA/ECB/PKCS1Padding加密模式的解决方案

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请参考如下代码：
public static async add(str: string, publicKey: string): Promise<string> {

  let result = ``;

  try {

  let asyKeyGenerator = cryptoFramework.createAsyKeyGenerator("RSA1024");

  let cipher = cryptoFramework.createCipher("RSA|ECB|PKCS1"); //创建一个 Cipher (加密)对象

  //引入外部的公钥加密

  let publicKeyDataBlob = { data: base.decodeSync(publicKey) };

  let keyGenPromise: cryptoFramework.KeyPair = await asyKeyGenerator.convertKey(publicKeyDataBlob, null);

  await cipher.init(cryptoFramework.CryptoMode.ENCRYPT_MODE, keyGenPromise.pubKey, null);

  let put: cryptoFramework.DataBlob = { data: stringToUint8Array(str) };

  const finalRes = await cipher.doFinal(put)

  result = base.encodeToStringSync(finalRes.data);

} catch (err) {

  console.log(err.message)

}

return result;

}