如何从EC公钥字节中获取PublicKey对象？

如何从EC公钥字节中获取PublicKey对象？

椭圆曲线键对Generation和键工厂上的Bouncy
Castle示例代码使
我非常接近。

一旦我成功创建了ECDSA密钥工厂和

secp256r1

/

NIST P-256

/

P-256

/

prime256v1

曲线的曲线规范，便可以

ECPointUtil.deprePoint

用来获取曲线点。然后，我可以生成一个公共密钥规范，该规范使我能够生成这样的公共密钥：

private PublicKey getPublicKeyFromBytes(byte[] pubKey) throws NoSuchAlgorithmException, InvalidKeySpecException {    ECNamedCurveParameterSpec spec = ECNamedCurveTable.getParameterSpec("prime256v1");    KeyFactory kf = KeyFactory.getInstance("ECDSA", new BouncyCastleProvider());    ECNamedCurveSpec params = new ECNamedCurveSpec("prime256v1", spec.getCurve(), spec.getG(), spec.getN());    ECPoint point =  ECPointUtil.deprePoint(params.getCurve(), pubKey);    ECPublicKeySpec pubKeySpec = new ECPublicKeySpec(point, params);    ECPublicKey pk = (ECPublicKey) kf.generatePublic(pubKeySpec);    return pk;}