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(C#) ScMinidriver - Find and Load Certificate from Smart Card or USB Token

See more ScMinidriver Examples

Demonstrates how to find and load a specific certificate located on a smart card or USB token.

Chilkat .NET Downloads

Chilkat .NET Framework

Chilkat for .NET Core

// 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 = "SCM Microsystems Inc. SCR33x USB Smart Card Reader 0";
bool success = scmd.AcquireContext(readerName);
if (success == false) {
    Debug.WriteLine(scmd.LastErrorText);
    return;
}

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

// If desired, perform regular PIN authentication with the smartcard.
// For more details about smart card PIN authentication, see the Smart Card PIN Authentication Example
int retval = scmd.PinAuthenticate("user","000000");
if (retval != 0) {
    Debug.WriteLine("PIN Authentication failed.");
}

// You can find a cerficate using any of the following certificate parts:
// "subjectDN" -- The full distinguished name of the cert.
// "subjectDN_withTags" -- Same as above, but in a format that includes the subject part tags, such as the "CN=" in "CN=something"
// "subjectCN" -- The common name part (CN) of the certificate's subject.
// "serial" -- The certificate serial number.
// "serial:issuerCN" -- The certificate serial number + the issuer's common name, delimited with a colon char.
// These are the same certificate parts that can be retrieved by listing certificates on the smart card (or USB token).
// See List Certificates on Smart Card Example
string certPart = "subjectCN";
string partValue = "PIVKey E42D60A759D39147A26E0AF2FB1183C5";

// If the certificate is found, it is loaded into the cert object.
Chilkat.Cert cert = new Chilkat.Cert();
success = scmd.FindCert(certPart,partValue,cert);
if (success == false) {
    Debug.WriteLine("Failed to find the certificate.");
}
else {
    Debug.WriteLine("Successfully loaded the cert object from the smart card / USB token.");

    // Note: When successful, the cert object is internally linked to the ScMinidriver object's authenticated session.
    // The cert object can now be used to sign or do other cryptographic operations that occur on the smart card / USB token.
    // If your application calls PinDeauthenticate or DeleteContext, the cert will no longer be able to sign on the smart card
    // because the smart card ScMinidriver session will no longer be authenticated or deleted.
}

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

// When finished with operations that required authentication, you may if you wish, deauthenticate the session.
success = scmd.PinDeauthenticate("user");
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);
}


 

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