(C# UWP/WinRT) PKCS11 Find All Certificates on Smart Card or USB Token

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Sample code showing how to examine all the certificates on a smart card or USB token.

Note: This example requires Chilkat v9.5.0.88 or later.

Chilkat Universal Windows Platform (UWP) / WinRT Downloads Chilkat for the Universal Windows Platform (UWP)

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// Note: Chilkat's PKCS11 implementation runs on Windows, Linux, Mac OS X, and other supported operating systems.

Chilkat.Pkcs11 pkcs11 = new Chilkat.Pkcs11();

pkcs11.SharedLibPath = "aetpkss1.dll";

bool success = pkcs11.Initialize();
if (success == false) {
    Debug.WriteLine(pkcs11.LastErrorText);
    return;
}

// We need to call Discover to get the slot ID.
// (A slot is a smart card reader or USB token.)
bool onlyTokensPresent = true;
Chilkat.JsonObject json = new Chilkat.JsonObject();
success = pkcs11.Discover(onlyTokensPresent,json);
if (success == false) {
    Debug.WriteLine(pkcs11.LastErrorText);
    return;
}

// Make sure we have at least one slot.
if (json.SizeOfArray("slot") <= 0) {
    Debug.WriteLine("No occuplied slots.");
    return;
}

// Get the ID of the 1st slot
int slotID = json.IntOf("slot[0].id");

// Open a session.
bool readWrite = true;
success = pkcs11.OpenSession(slotID,readWrite);
if (success == false) {
    Debug.WriteLine(pkcs11.LastErrorText);
    return;
}

// Make it an authenticated session by calling Login.
// 
// If we don't authenticate, then we won't be able to see the private keys, and thus
// we won't know which certificates have an associated private key stored on the smart card.

// The smart card PIN is passed to the Login method.
// userType 1 indicates a "Normal User".
int userType = 1;
string pin = "0000";
success = pkcs11.Login(userType,pin);
if (success == false) {
    Debug.WriteLine(pkcs11.LastErrorText);
    success = pkcs11.CloseSession();
    return;
}

// Call FindAllCerts to find all certificates on the smart card or USB token.
success = pkcs11.FindAllCerts();
if (success == false) {
    Debug.WriteLine(pkcs11.LastErrorText);
    success = pkcs11.CloseSession();
    return;
}

// The NumCerts property is set by FindAllCerts.
int numCerts = pkcs11.NumCerts;
Debug.WriteLine("Number of certs: " + Convert.ToString(numCerts));

string privateKeyNote;
Chilkat.Cert cert = new Chilkat.Cert();
int i = 0;
while (i < numCerts) {
    pkcs11.GetCert(i,cert);
    privateKeyNote = "";
    if (cert.HasPrivateKey() == true) {
        privateKeyNote = "(has private key)";
    }

    Debug.WriteLine(Convert.ToString(i) + ": " + privateKeyNote + " " + cert.SubjectDN);
    Debug.WriteLine(Convert.ToString(i) + ": issuer: " + cert.IssuerDN);
    Debug.WriteLine("----");
    i = i + 1;
}

// Revert to an unauthenticated session by calling Logout.
success = pkcs11.Logout();
if (success == false) {
    Debug.WriteLine(pkcs11.LastErrorText);
    success = pkcs11.CloseSession();
    return;
}

// When finished, close the session.
// It is important to close the session (memory leaks will occur if the session is not properly closed).
success = pkcs11.CloseSession();
if (success == false) {
    Debug.WriteLine(pkcs11.LastErrorText);
    return;
}

Debug.WriteLine("Success.");