HarmonyOS 使用SHA256WithRSA签名算法验签，有现成的方案吗

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; 
}
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