(.NET Core C#) Find Certificate on Smartcard Currenty in Reader

Finds the certificates on smartcards currently in readers.

Note: This example requires Chilkat v9.5.0.77 or greater.

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// This newer example is a much better way to get the certificate on a smartcard or USB token

// This example requires that we already know the name of the CSP (Cryptographic Service Provider) for the smartcard.
// It is often the "Microsoft Base Smart Card Crypto Provider".  You can see what CSP's are registered on your system with this code:

Chilkat.Csp csp = new Chilkat.Csp();
Chilkat.StringTable st = new Chilkat.StringTable();

bool success = csp.GetProviders(st);
if (success == false) {
    Debug.WriteLine(csp.LastErrorText);
    return;
}

// Iterate over the CSP names..
int i = 0;
int numProviders = st.Count;
while (i < numProviders) {
    Debug.WriteLine(Convert.ToString(i) + ": " + st.StringAt(i));
    i = i + 1;
}

// --------------------------
// This newer example is a much better way to get the certificate on a smartcard or USB token

// We'll assume our smartcard is accessed through the "Microsoft Base Smart Card Crypto Provider"
// Also, we'll assume that the certificate has been installed into the default current user Windows
// certificate store by following the instructions provided by the smartcard vendor.
// (The certificate does not contain the private key.  The certificate should be installed in the
// Windows current user certificate store.  It will also be on the smartcard, and the associated private
// key is only on the smartcard.)
// 

// First open the Current User Certificate Store.  We'll need it soon..
Chilkat.CertStore certStore = new Chilkat.CertStore();
success = certStore.OpenCurrentUserStore(true);
if (success == false) {
    Debug.WriteLine(certStore.LastErrorText);
    return;
}

// Create a Csp object and set the ProviderName equal to our desired CSP name.
// (setting the ProviderName selects the desired CSP.)
csp.ProviderName = "Microsoft Base Smart Card Crypto Provider";

// Iterate over the key containers managed by this CSP.
// These will be the key containers for the cards currently inserted into the reader(s).
// If only one smartcard reader exists, and a smartcard is inserted, there should be one
// key container.
int numContainers = csp.NumKeyContainers;

Debug.WriteLine("numContainers = " + Convert.ToString(numContainers));

i = 0;
while (i < numContainers) {
    // For each key container, get the key container name and then find the certificate
    // in the Current User Certicate Store with the matching key container name.
    string keyContainerName = csp.NthKeyContainerName(i);

    Chilkat.Cert cert = certStore.FindCertByKeyContainer(keyContainerName);
    if (certStore.LastMethodSuccess == true) {
        Debug.WriteLine("Certificate in reader: " + cert.SubjectCN);

    }

    i = i + 1;
}