Unicode C

PKCS11 Certificate Chain

See more PKCS11 Examples

Demonstrates how to make CA certs available for the certificate chain to be included when creating a signature (using a PKCS11 compatible smart card / USB token) such as for PDF, XMLDSig, etc.

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

Unicode C

#include <C_CkPkcs11W.h>
#include <C_CkCertW.h>
#include <C_CkXmlCertVaultW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkPkcs11W pkcs11;
    int slotID;
    BOOL readWrite;
    int userType;
    const wchar_t *pin;
    HCkCertW cert;
    HCkXmlCertVaultW certVault;

    success = FALSE;

    // 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 = CkPkcs11W_Create();

    // You will use the DLL (or shared lib) provided by your smart card vendor, or a DLL compatible with your smart card.
    // On Windows, if the DLL is located in C:\Windows\System32, specify only the filename.
    // Otherwise provide the full path.
    CkPkcs11W_putSharedLibPath(pkcs11,L"bit4xpki.dll");

    success = CkPkcs11W_Initialize(pkcs11);
    if (success == FALSE) {
        wprintf(L"%s\n",CkPkcs11W_lastErrorText(pkcs11));
        CkPkcs11W_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 = CkPkcs11W_OpenSession(pkcs11,slotID,readWrite);
    if (success == FALSE) {
        wprintf(L"%s\n",CkPkcs11W_lastErrorText(pkcs11));
        CkPkcs11W_Dispose(pkcs11);
        return;
    }

    // Make it an authenticated session by calling Login.
    userType = 1;
    // Make sure to use the correct PIN for your smart card..
    pin = L"0000";
    success = CkPkcs11W_Login(pkcs11,userType,pin);
    if (success == FALSE) {
        wprintf(L"%s\n",CkPkcs11W_lastErrorText(pkcs11));
        success = CkPkcs11W_CloseSession(pkcs11);
        CkPkcs11W_Dispose(pkcs11);
        return;
    }

    // Get the certificate (on the smart card) that has a private key.
    cert = CkCertW_Create();
    success = CkPkcs11W_FindCert(pkcs11,L"privateKey",L"",cert);
    if (success == TRUE) {
        wprintf(L"Cert with private key: %s\n",CkCertW_subjectCN(cert));
    }
    else {
        wprintf(L"No certificates having a private key were found.\n");
        success = CkPkcs11W_CloseSession(pkcs11);
        CkPkcs11W_Dispose(pkcs11);
        CkCertW_Dispose(cert);
        return;
    }

    // If the certificates in the chain of authentication were contained on the smart card,
    // then Chilkat would already have them (via the FindCert function) and the certs in the chain will be automatically used
    // as needed when signing occurs.

    // If you have CA certs located elsewhere, such as in .cer files, you can make them available to Chilkat in the following way:

    certVault = CkXmlCertVaultW_Create();
    // Please review the methods available in the XML certificate vault class.  Different methods exist for adding certificates
    // from various sources, such as PEM, PFX, or in-memory sources..
    success = CkXmlCertVaultW_AddCertFile(certVault,L"someDir/caIntermediateCert.cer");
    // ...
    success = CkXmlCertVaultW_AddCertFile(certVault,L"someDir/caCert.cer");
    // (Your code should check the return value to make sure it succeeded.)

    success = CkCertW_UseCertVault(cert,certVault);
    if (success == FALSE) {
        wprintf(L"%s\n",CkCertW_lastErrorText(cert));
        success = CkPkcs11W_CloseSession(pkcs11);
        CkPkcs11W_Dispose(pkcs11);
        CkCertW_Dispose(cert);
        CkXmlCertVaultW_Dispose(certVault);
        return;
    }

    // --------------------------------------------------------------------------
    // At this point, we have the cert (and certs in the chain of authentication) to be used for signing.
    // The code for using the certificate in creating the digital signature, such as for a PDF, XML, etc., go here...

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

    // Revert to an unauthenticated session by calling Logout.
    success = CkPkcs11W_Logout(pkcs11);
    if (success == FALSE) {
        wprintf(L"%s\n",CkPkcs11W_lastErrorText(pkcs11));
        success = CkPkcs11W_CloseSession(pkcs11);
        CkPkcs11W_Dispose(pkcs11);
        CkCertW_Dispose(cert);
        CkXmlCertVaultW_Dispose(certVault);
        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 = CkPkcs11W_CloseSession(pkcs11);
    if (success == FALSE) {
        wprintf(L"%s\n",CkPkcs11W_lastErrorText(pkcs11));
        CkPkcs11W_Dispose(pkcs11);
        CkCertW_Dispose(cert);
        CkXmlCertVaultW_Dispose(certVault);
        return;
    }

    wprintf(L"Success.\n");


    CkPkcs11W_Dispose(pkcs11);
    CkCertW_Dispose(cert);
    CkXmlCertVaultW_Dispose(certVault);

    }