將 ECC 私鑰 PEM 讀入 AsymmetricCipherKeyPair c# 充氣城堡

Question

我使用 Bouncy Castle 生成 PEM 格式的 ECC 密鑰對：

var curve = ECNamedCurveTable.GetByName("secp256k1");
var domainParams = new ECDomainParameters(curve.Curve, curve.G, curve.N, curve.H, curve.GetSeed());

var secureRandom = new SecureRandom();
var keyParams = new ECKeyGenerationParameters(domainParams, secureRandom);

var generator = new ECKeyPairGenerator("ECDSA");
generator.Init(keyParams);
AsymmetricCipherKeyPair keyPair = generator.GenerateKeyPair();
TextWriter textWriter = new StringWriter();
PemWriter pemWriter = new PemWriter(textWriter);
pemWriter.WriteObject(keyPair.Private);
pemWriter.Writer.Flush();
string pem_privatekey = textWriter.ToString();

我當前的 ECC 私鑰是：

-----BEGIN EC PRIVATE KEY-----MIIBUQIBAQQgyDHBaj30dcIsS4otdOXR8ue+rZDwHcGEjxwle3H24W6ggeMwgeACAQEwLAYHKoZIzj0BAQIhAP////////////////////////////////////7///wvMEQEIAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABCAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABwRBBHm+Zn753LusVaBilc6HCwcCm/zbLc4o2VnygVsW+BeYSDradyajxGVdpPv8DhEIqP0XtEimhVQZnEfQj/sQ1LgCIQD////////////////////+uq7c5q9IoDu/0l6M0DZBQQIBAaFEA0IABHxw0PK0uEvnF1lwhkLmHUlVtQVUrLp/1EcKzfAm6xOL/I6LtQ9nXPxDNhaxf/rPtk3DkZ5CaO0hLr1trCRrJz8=-----END EC PRIVATE KEY-----

我想以充氣城堡ECPrivateKeyParameters或AsymmetricCipherKeyPair格式讀取此 pem 格式。 我正在嘗試以下代碼。 pem是上面的私鑰字符串。

PemReader pr = new PemReader(new StringReader(pem));
ECPrivateKeyParameters KeyPair = (ECPrivateKeyParameters)pr.ReadObject();

為什么這會返回 null？ 請糾正我。

Answer 1

pr.ReadObject()在這里返回一個AsymmetricCipherKeyPair實例。 這具有Private和Public屬性，它們在這里分別返回一個ECPrivateKeyParameters和ECPublicKeyParameters實例，即代碼應該是：

PemReader pr = new PemReader(new StringReader(pem));
AsymmetricCipherKeyPair keyPair = (AsymmetricCipherKeyPair)pr.ReadObject();
ECPrivateKeyParameters privateKeyParams = (ECPrivateKeyParameters)keyPair.Private;
ECPublicKeyParameters publicKeyParams = (ECPublicKeyParameters)keyPair.Public; // for completeness