(C) PKCS11 Find Specific Certificate on Smart Card or USB Token

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This example code shows how to find a particular certificate on a smart card or USB token.

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

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#include <C_CkPkcs11.h>
#include <C_CkCert.h>

void ChilkatSample(void)
    {
    HCkPkcs11 pkcs11;
    BOOL success;
    int slotID;
    BOOL readWrite;
    int userType;
    const char *pin;
    HCkCert cert;

    // 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.

    pkcs11 = CkPkcs11_Create();

    // Set your shared lib path -- either a full path to the DLL, .so, or .dylib,
    // or just the filename if the driver is in a location that can be automatically found. (Such as in C:\Windows\System32)
    CkPkcs11_putSharedLibPath(pkcs11,"C:/Program Files (x86)/Gemalto/IDGo 800 PKCS#11/IDPrimePKCS1164.dll");

    success = CkPkcs11_Initialize(pkcs11);
    if (success == FALSE) {
        printf("%s\n",CkPkcs11_lastErrorText(pkcs11));
        CkPkcs11_Dispose(pkcs11);
        return;
    }

    // Pass -1 for the slotID to open a session on the first non-empty slot.
    slotID = -1;

    // Open a session.
    readWrite = TRUE;
    success = CkPkcs11_OpenSession(pkcs11,slotID,readWrite);
    if (success == FALSE) {
        printf("%s\n",CkPkcs11_lastErrorText(pkcs11));
        CkPkcs11_Dispose(pkcs11);
        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".
    userType = 1;
    pin = "0000";
    success = CkPkcs11_Login(pkcs11,userType,pin);
    if (success == FALSE) {
        printf("%s\n",CkPkcs11_lastErrorText(pkcs11));
        success = CkPkcs11_CloseSession(pkcs11);
        CkPkcs11_Dispose(pkcs11);
        return;
    }

    // --------------------------------------------------------------------------
    // The FindCert method can find a particular certificate in a number of different ways.
    // I'll demonstrate some common ways..

    // 1) In many cases you'll be working with a smart card that contains one certificate that is to be used for 
    // signing, and it is the certificate that is associated with the private key also stored on the smart card (or USB token).
    // There may be other certificates on the card, but these are the issuer certificates in the chain of authentication.
    // You're just interested in getting the certificate with the private key.
    // You can do it like this:
    cert = CkCert_Create();
    // Pass the keyword "privateKey" in the 1st argument, and an empty string in the 2nd arg.
    // This returns the 1st certificate that has a private key.
    success = CkPkcs11_FindCert(pkcs11,"privateKey","",cert);
    if (success == TRUE) {
        printf("Cert with private key: %s\n",CkCert_subjectCN(cert));
    }
    else {
        printf("No certificates having a private key were found.\n");
    }

    // 2) Find a certificate by the Subject Common Name
    success = CkPkcs11_FindCert(pkcs11,"subjectCN","Chil application account (8c9be8e0-5544-4cd0-9062-290fbff353a7)",cert);
    if (success == TRUE) {
        printf("Found: %s\n",CkCert_subjectCN(cert));
    }
    else {
        printf("Not found: %s\n",CkCert_subjectCN(cert));
    }

    // 3) Find a certificate by hex serial number
    success = CkPkcs11_FindCert(pkcs11,"serial","5087bf1feda006af54a02f23a851104948acc26f",cert);
    if (success == TRUE) {
        printf("Found: %s\n",CkCert_serialNumber(cert));
    }
    else {
        printf("Not found: %s\n",CkCert_serialNumber(cert));
    }

    // 4) Find a certificate by hex serial number and Issuer Common Name
    success = CkPkcs11_FindCert(pkcs11,"serial:issuerCN","5087bf1feda006af54a02f23a851104948acc26f:Ibanity Production Third Party Application CA",cert);
    if (success == TRUE) {
        printf("Found: %s\n",CkCert_subjectCN(cert));
    }
    else {
        printf("Not found: %s\n",CkCert_subjectCN(cert));
    }

    // --------------------------------------------------------------------------

    // Revert to an unauthenticated session by calling Logout.
    success = CkPkcs11_Logout(pkcs11);
    if (success == FALSE) {
        printf("%s\n",CkPkcs11_lastErrorText(pkcs11));
        success = CkPkcs11_CloseSession(pkcs11);
        CkPkcs11_Dispose(pkcs11);
        CkCert_Dispose(cert);
        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 = CkPkcs11_CloseSession(pkcs11);
    if (success == FALSE) {
        printf("%s\n",CkPkcs11_lastErrorText(pkcs11));
        CkPkcs11_Dispose(pkcs11);
        CkCert_Dispose(cert);
        return;
    }

    printf("Success.\n");


    CkPkcs11_Dispose(pkcs11);
    CkCert_Dispose(cert);

    }