c# 如何从 cngKey

如何解决c# 如何从 cngKey

我使用的是 C#、.NET Core 3.1（如果需要，也可以使用 BouncyCastle）。

我有我的 EC 私钥（我称之为 bobKey），我有一个由第三方发送的临时公钥（我称之为 aliceKey）。请问如何获取 aliceKey 的 X 和 Y？

using var ecdh = new ECDiffieHellmanCng();
ecdh.KeyDerivationFunction = ECDiffieHellmanKeyDerivationFunction.Hash; // Note sure if I need this but I have it in third party too.
ecdh.HashAlgorithm = Cngalgorithm.Sha256; // Note sure if I need this but I have it in third party too.

ecdh.ImportECPrivateKey(bobKey,out var _);

CngKey importedKey = ImportEcpublicKey(aliceKey);

var derivedSymmetricKey= ecdh.DeriveKeyMaterial(importedKey);

MyLogger.LogIt("derivedSymmetricKey:" + PrintByteArray(derivedSymmetricKey));  // I can see that derivedSymmetricKey is the same when observing from third party code!

// I have realised that these 2 lines are actually showing bobs public key X and Y which is not what I want.
var x = ecdh.PublicKey.ExportParameters().Q.X;
var y = ecdh.PublicKey.ExportParameters().Q.Y;

MyLogger.LogIt("x:" + PrintByteArray(x));
MyLogger.LogIt("y:" + PrintByteArray(y));

我需要 X 和 Y 的是 aliceKey / importedKey 但我如何从变量类型 CngKey 中获取它？