HarmonyOS SM2公私钥转换

SM2公私钥生成后如何将公钥转为128位的十六进制，私钥转为64位的十六进制，按照官方的代码示例转换出来不是想要的长度。

生成密钥代码：

function generateSM2Key() {
  // Create an AsyKeyGenerator instance.
  let sm2Generator = cryptoFramework.createAsyKeyGenerator("ECC256");
  // Use the key generator to randomly generate an asymmetric key pair.
  let keyGenPromise = sm2Generator.generateKeyPair();

  keyGenPromise.then(keyPair => {
    let pubKey = keyPair.pubKey;
    let priKey = keyPair.priKey;
    // Obtain the binary data of the asymmetric key pair.
    let pkBlob = pubKey.getEncoded();
    let skBlob = priKey.getEncoded();
    console.log(buffer.from(pkBlob.data).toString('hex'));
    console.log(buffer.from(skBlob.data).toString('hex'));
    AlertDialog.show({ message: "pk bin data" + pkBlob.data });
    AlertDialog.show({ message: "sk bin data" + skBlob.data });
  })
}