HarmonyOS 是否有使用SHA256withRSA加密验签的demo

可参考如下demo：

async function signMessagePromise(priKey: cryptoFramework.PriKey，message:cryptoFramework.DataBlob) {
  let signAlg = "RSA1024|PKCS1|SHA256";
  let signer = cryptoFramework.createSign(signAlg);
  await signer.init(priKey);
  let signData = await signer.sign(message);
  return signData;
}
async function verifyMessagePromise(signMessageBlob: cryptoFramework.DataBlob, pubKey: cryptoFramework.PubKey,message:cryptoFramework.DataBlob) {
  let verifyAlg = "RSA1024|PKCS1|SHA256";
  let verifier = cryptoFramework.createVerify(verifyAlg);
  await verifier.init(pubKey);
  let res = await verifier.verify(message, signMessageBlob);
  console.info("verify result is " + res);
  return res;
}