I create a certificate using BouncyCastle
var keypairgen = new RsaKeyPairGenerator();
keypairgen.Init(new KeyGenerationParameters(new SecureRandom(new CryptoApiRandomGenerator()), 1024));
var keypair = keypairgen.GenerateKeyPair();
var gen = new X509V3CertificateGenerator();
var CN = new X509Name("CN=" + certName);
var SN = BigInteger.ProbablePrime(120, new Random());
gen.SetSerialNumber(SN);
gen.SetSubjectDN(CN);
gen.SetIssuerDN(CN);
gen.SetNotAfter(DateTime.Now.AddYears(1));
gen.SetNotBefore(DateTime.Now.Subtract(new TimeSpan(7,0,0,0)));
gen.SetSignatureAlgorithm("MD5WithRSA");
gen.SetPublicKey(keypair.Public);
gen.AddExtension(
X509Extensions.AuthorityKeyIdentifier.Id,
false,
new AuthorityKeyIdentifier(
SubjectPublicKeyInfoFactory.CreateSubjectPublicKeyInfo(keypair.Public),
new GeneralNames(new GeneralName(CN)),
SN
));
gen.AddExtension(
X509Extensions.ExtendedKeyUsage.Id,
false,
new ExtendedKeyUsage(new ArrayList()
{
new DerObjectIdentifier("1.3.6.1.5.5.7.3.1")
}));
var newCert = gen.Generate(keypair.Private);
This end with
X509Certificate2 certificate = new X509Certificate2(DotNetUtilities.ToX509Certificate((Org.BouncyCastle.X509.X509Certificate)newCert));
Now, because my assignment tells me to store both the Certificate and the PrivateKey in the X509Certificate2 object I need a way to convert the keypair.Private into a X509Certificate2.Private. Any ideas?
Thanks.
Just be be verbose, this is the full code to add after creation of X509Certificate2 certificate:
RSA rsaPriv = DotNetUtilities.ToRSA(keypair.Private as RsaPrivateCrtKeyParameters);
certificate.PrivateKey = rsaPriv;
(Which of course can be optimised into one line.)