如何在C＃（Mono / Xamarin）中使用Bouncy Castle導入簽名的SSL證書？

Question

我使用Bouncy Castle生成私鑰，以及PKCS10 CSR，然后我將其發送到遠程服務器進行簽名。 我作為字符串回復了標准的base64編碼的簽名SSL證書。 問題是，如何從字符串導入簽名證書，然后將私鑰和簽名證書保存為PKCS12（.PFX）文件？

此外，如何捆綁CA證書以包含在PFX文件中？

// Generate the private/public keypair
RsaKeyPairGenerator kpgen = new RsaKeyPairGenerator ();
CryptoApiRandomGenerator randomGenerator = new CryptoApiRandomGenerator ();
kpgen.Init (new KeyGenerationParameters (new SecureRandom (randomGenerator), 2048));
AsymmetricCipherKeyPair keyPair = kpgen.GenerateKeyPair ();

// Generate the CSR
X509Name subjectName = new X509Name ("CN=domain.com/name=Name");
Pkcs10CertificationRequest kpGen = new Pkcs10CertificationRequest ("SHA256withRSA", subjectName, keyPair.Public, null, keyPair.Private);
string certCsr = Convert.ToBase64String (kpGen.GetDerEncoded ());

// ** certCsr is now sent to be signed  **
// ** let's assume that we get "certSigned" in response, and also have the CA **
string certSigned = "[standard signed certificate goes here]";
string certCA = "[standard CA certificate goes here]";

// Now how do I import certSigned and certCA
// Finally how do I export everything as a PFX file?

Answer 1

Bouncy Castle是一個非常強大的庫，但缺乏文檔使得它很難使用。 在通過所有類和方法搜索了太長時間之后，我終於找到了我想要的東西。 以下代碼將使用先前生成的私鑰，將其與簽名證書和CA捆綁在一起，然后將其另存為.PFX文件：

// Import the signed certificate
X509Certificate signedX509Cert = new X509CertificateParser ().ReadCertificate (Encoding.UTF8.GetBytes (certSigned));
X509CertificateEntry certEntry = new X509CertificateEntry (signedX509Cert);

// Import the CA certificate
X509Certificate signedX509CaCert = new X509CertificateParser ().ReadCertificate (Encoding.UTF8.GetBytes (certCA ));
X509CertificateEntry certCaEntry = new X509CertificateEntry (signedX509CaCert);

// Prepare the pkcs12 certificate store
Pkcs12Store store = new Pkcs12StoreBuilder ().Build ();

// Bundle together the private key, signed certificate and CA
store.SetKeyEntry (signedX509Cert.SubjectDN.ToString () + "_key", new AsymmetricKeyEntry (keyPair.Private), new X509CertificateEntry[] {
    certEntry,
    certCaEntry
});

// Finally save the bundle as a PFX file
using (var filestream = new FileStream (@"CertBundle.pfx", FileMode.Create, FileAccess.ReadWrite)) {
    store.Save (filestream, "password".ToCharArray (), new SecureRandom ());
}

歡迎提供反饋和改進！