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(MFC) ScMinidriver - Load Certificate from Smart Card or USB Token by Index

See more ScMinidriver Examples

Demonstrates how to load a certificate located on a smart card or USB token by key container index.

Note: This functionality was introduced in Chilkat v9.5.0.87.

Note: The ScMinidriver functionality is for Windows-only because ScMinidriver DLLs only exist on Windows. In the next version, Chilkat will be releasing a Pkcs11 class to support Linux, MacOSX, and possibly other operating systems.

Chilkat C/C++ Library Downloads

MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkScMinidriver.h>
#include <CkCert.h>

void ChilkatSample(void)
    {
    CkString strOut;

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

    // Reader names (smart card readers or USB tokens) can be discovered
    // via List Readers or Find Smart Cards
    const char *readerName = "SCM Microsystems Inc. SCR33x USB Smart Card Reader 0";
    bool success = scmd.AcquireContext(readerName);
    if (success == false) {
        strOut.append(scmd.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // If successful, the name of the currently inserted smart card is available:
    strOut.append("Card name: ");
    strOut.append(scmd.cardName());
    strOut.append("\r\n");

    // 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) {
        strOut.append("PIN Authentication failed.");
        strOut.append("\r\n");
    }

    CkCert cert;
    // We can pass a specific key container index, or -1 to locate the 1st non-empty container containing a certificate and private key.
    int keyContainerIndex = -1;
    // keySpec can be "kex" or "sig" to indicate the key-exchange or signature position within the container.
    // keySpec can also be "any" to accept either position, with preference given to the "sig" position if both are occupied.
    const char *keySpec = "any";
    success = scmd.GetCert(keyContainerIndex,keySpec,cert);
    if (success == false) {
        strOut.append("Failed to load the certificate.");
        strOut.append("\r\n");
    }
    else {
        strOut.append("Successfully loaded the cert object from the smart card / USB token.");
        strOut.append("\r\n");

        // 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) {
        strOut.append(scmd.lastErrorText());
        strOut.append("\r\n");
    }

    // Delete the context when finished with the card.
    success = scmd.DeleteContext();
    if (success == false) {
        strOut.append(scmd.lastErrorText());
        strOut.append("\r\n");
    }



    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }

 

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