Hi,

I have to export certificate from X509Certificate2, and here is my code:

            CryptokiCollection myTemplate = new CryptokiCollection();
            myTemplate.Add(new ObjectAttribute(ObjectAttribute.CKA_CLASS, CryptokiObject.CKO_CERTIFICATE));
            myTemplate.Add(new ObjectAttribute(ObjectAttribute.CKA_CERTIFICATE_TYPE, Certificate.CKC_X_509));
            CryptokiCollection myObjects = session.Objects.Find(myTemplate, 1);
            if (myObjects.Count == 0)
            {
                Console.WriteLine("CERTIFICATE NOT FOUND");
            }
            Cryptware.NCryptoki.X509Certificate certificate = (Cryptware.NCryptoki.X509Certificate)myObjects[0];
            X509Certificate2 myCert = Utils.ConvertCertificate(certificate);
            X509Certificate2UI.DisplayCertificate(myCert);
            StreamWriter myStreamWriter = new StreamWriter("C:\\myCert.cer");
            myStreamWriter.Write(myCert.Export(X509ContentType.Cert));
            myStreamWriter.Close();

The code "X509Certificate2UI.DisplayCertificate(myCert);" was success, and it showed my Certificate Infomation. But when i opened myCert.cer file, it showed "This file is invalid for use as the following: Security Certificate". When i set break point to this line: "X509Certificate2UI.DisplayCertificate(myCert);", i saw myCert.HasPrivateKey = false, and myCert.PrivateKey = null. I think that why my certificate file was error. please help me solve my problem.

Thanks.

Hideo