Java Bouncy Castle：点编码无效 0x45

我使用bouncy castle库在java中加载公钥，但总是出现错误Invalid point encoding 0x45.

公钥是使用C#CNG API在客户端生成的.

Java方法1:

public PublicKey loadPublicKey(String encodedPublicKey)
            throws NoSuchProvider例外, NoSuch算法rithm例外, InvalidKeySpec例外 {
        
        byte[] keybytes = java.util.Base64.getDecoder().decode(encodedPublicKey);
        
        Security.addProvider(new BouncyCastleProvider());
        
        ECNamedCurveParameterSpec params = ECNamedCurveTable.getParameterSpec("P-256");
        
        ECPublicKeySpec keySpec = new ECPublicKeySpec(params.getCurve().decodePoint(keybytes), params);
        
        return new BCECPublicKey("ECDH", keySpec, BouncyCastleProvider.CONFIGURATION);

    }

方法2

public PublicKey loadPublicKey(String pKey) throws 例外 {
        byte[] keybytes = java.util.Base64.getDecoder().decode(pKey);
        Security.addProvider(new BouncyCastleProvider());
        ECParameterSpec params = ECNamedCurveTable.getParameterSpec("P-256");
        ECPublicKeySpec pubKey = new ECPublicKeySpec(params.getCurve().decodePoint(keybytes), params);
        KeyFactory kf = KeyFactory.getInstance("ECDH", "BC");
        return kf.generatePublic(pubKey);
    }

例外

java.lang.IllegalArgument例外: Invalid point encoding 0x45
    at org.bouncycastle.math.ec.ECCurve.decodePoint(ECCurve.java:443)

下面是创建公钥的方法

public static (byte[] publicKey, byte[] privateKey) CreateKeyPair()
        {
            using (ECDiffieHellmanCng cng = new ECDiffieHellmanCng(
                // need to do this to be able to export private key
                CngKey.Create(
                    Cng算法rithm.ECDiffieHellmanP256,
                    null,
                    new CngKeyCreationParameters
                    { ExportPolicy = CngExportPolicies.AllowPlaintextExport })))
            {
                cng.KeyDerivationFunction = ECDiffieHellmanKeyDerivationFunction.Hash;
                cng.Hash算法rithm = Cng算法rithm.Sha256;
                // export both private and public keys and return
                var pr = cng.Key.Export(CngKeyBlobFormat.EccPrivateBlob);
                var pub = cng.PublicKey.ToByteArray();
                return (pub, pr);
            }
        }

生成的公钥RUNLMSAAAAHddHI6TOEDG/Ka7naBbLQH0u/DSFfbKJI2w0WSoxrmFkwKm1tktz4wD0rqnwkZp8FwdHJ+8OVrTcpDMmxrwvS6

我在java收到的密钥是72 bytes.但我认为bouncy castle java支持64 bytes键.

我也在调查this人，但没有得到任何帮助