I found this other SO question that put me on the right track. Certificates API was added to .Net Core on 2.0 version. I have a function like the next one to create self signed certificates that I later import into My store to use them on IIS.
private X509Certificate2 buildSelfSignedServerCertificate()
{
SubjectAlternativeNameBuilder sanBuilder = new SubjectAlternativeNameBuilder();
sanBuilder.AddIpAddress(IPAddress.Loopback);
sanBuilder.AddIpAddress(IPAddress.IPv6Loopback);
sanBuilder.AddDnsName("localhost");
sanBuilder.AddDnsName(Environment.MachineName);
X500DistinguishedName distinguishedName = new X500DistinguishedName($"CN={CertificateName}");
using (RSA rsa = RSA.Create(2048))
{
var request = new CertificateRequest(distinguishedName, rsa, HashAlgorithmName.SHA256,RSASignaturePadding.Pkcs1);
request.CertificateExtensions.Add(
new X509KeyUsageExtension(X509KeyUsageFlags.DataEncipherment | X509KeyUsageFlags.KeyEncipherment | X509KeyUsageFlags.DigitalSignature , false));
request.CertificateExtensions.Add(
new X509EnhancedKeyUsageExtension(
new OidCollection { new Oid("1.3.6.1.5.5.7.3.1") }, false));
request.CertificateExtensions.Add(sanBuilder.Build());
var certificate= request.CreateSelfSigned(new DateTimeOffset(DateTime.UtcNow.AddDays(-1)), new DateTimeOffset(DateTime.UtcNow.AddDays(3650)));
certificate.FriendlyName = CertificateName;
return new X509Certificate2(certificate.Export(X509ContentType.Pfx, "WeNeedASaf3rPassword"), "WeNeedASaf3rPassword", X509KeyStorageFlags.MachineKeySet);
}
}
If you want the pfx, the Export function on X509Certificate2 should do the trick. It returns a byte array with the raw pfx data.
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