(C#) ScMinidriver - PIN Authentication for Smart Card or USB Token

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Demonstrates how to PIN authenticate with a connected smart card or USB token.

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

Chilkat.ScMinidriver scmd = new Chilkat.ScMinidriver();

// Reader names (smart card readers or USB tokens) can be discovered
// via List Readers or Find Smart Cards
string readerName = "Alcor Micro USB Smart Card Reader 0";
bool success = scmd.AcquireContext(readerName);
if (success == false) {
    Debug.WriteLine(scmd.LastErrorText);
    return;
}

// If we are successful, the name of the currently inserted smart card is available:
string cardName = scmd.CardName;
Debug.WriteLine("Card name: " + cardName);

// Perform regular PIN authentication with the smartcard.
// If authentication is successful, then the ScMinidriver session is authenticated and
// operations such as signing are permissible.

// The pin ID can be "user", "admin", or a number "3" through "7" (passed as a string).
// The possible pin ID's for a given smartcard are obtained via the GetCardProperties method.
// See Get Smart Card Properties for sample code.
// You should generally use the "user" pin ID.  You would only use the other pin ID's for very specific purposes.
string pinId = "user";

// Change this to the PIN for your smart card.
string pin = "0000";

int retval = scmd.PinAuthenticate(pinId,pin);

// The return value is 0 for success.
// If the retval is greater than 0, it is the number of attempts remaining before the PIN is blocked.
// If the retval equals -1, then something else went wrong and you should consult the LastErrorText.
if (retval < 0) {
    Debug.WriteLine(scmd.LastErrorText);
    return;
}

if (retval > 0) {
    Debug.WriteLine("PIN authentcation failed, " + Convert.ToString(retval) + " attempts remaining before the PIN is blocked.");
}
else {
    Debug.WriteLine("PIN authentication successful. Your session is now authenticated and you may proceed with operations such as signing.");
}

// ...
// ...
// ...

// You may deauthenticate the session when finished with operations that required authentication.
success = scmd.PinDeauthenticate(pinId);
if (success == false) {
    Debug.WriteLine(scmd.LastErrorText);
}

// Delete the context when finished with the card.
success = scmd.DeleteContext();
if (success == false) {
    Debug.WriteLine(scmd.LastErrorText);
}