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DataFlex Examples

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(DataFlex) 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.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-9.5.0-win32.pkg

Procedure Test
    Handle hoPkcs11
    Boolean iSuccess
    Integer iSlotID
    Boolean iReadWrite
    Integer iUserType
    String sPin
    Variant vCert
    Handle hoCert
    Variant vCertVault
    Handle hoCertVault
    String sTemp1

    // 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.

    Get Create (RefClass(cComChilkatPkcs11)) To hoPkcs11
    If (Not(IsComObjectCreated(hoPkcs11))) Begin
        Send CreateComObject of hoPkcs11
    End

    // 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.
    Set ComSharedLibPath Of hoPkcs11 To "bit4xpki.dll"

    Get ComInitialize Of hoPkcs11 To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoPkcs11 To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Pass -1 for the slotID to open a session on the first non-empty slot.
    Move -1 To iSlotID

    // Open a session.
    Move True To iReadWrite
    Get ComOpenSession Of hoPkcs11 iSlotID iReadWrite To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoPkcs11 To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Make it an authenticated session by calling Login.
    Move 1 To iUserType
    // Make sure to use the correct PIN for your smart card..
    Move "0000" To sPin
    Get ComLogin Of hoPkcs11 iUserType sPin To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoPkcs11 To sTemp1
        Showln sTemp1
        Get ComCloseSession Of hoPkcs11 To iSuccess
        Procedure_Return
    End

    // Get the certificate (on the smart card) that has a private key.
    Get Create (RefClass(cComChilkatCert)) To hoCert
    If (Not(IsComObjectCreated(hoCert))) Begin
        Send CreateComObject of hoCert
    End
    Get pvComObject of hoCert to vCert
    Get ComFindCert Of hoPkcs11 "privateKey" "" vCert To iSuccess
    If (iSuccess = True) Begin
        Get ComSubjectCN Of hoCert To sTemp1
        Showln "Cert with private key: " sTemp1
    End
    Else Begin
        Showln "No certificates having a private key were found."
        Get ComCloseSession Of hoPkcs11 To iSuccess
        Procedure_Return
    End

    // 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:

    Get Create (RefClass(cComChilkatXmlCertVault)) To hoCertVault
    If (Not(IsComObjectCreated(hoCertVault))) Begin
        Send CreateComObject of hoCertVault
    End
    // 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..
    Get ComAddCertFile Of hoCertVault "someDir/caIntermediateCert.cer" To iSuccess
    // ...
    Get ComAddCertFile Of hoCertVault "someDir/caCert.cer" To iSuccess
    // (Your code should check the return value to make sure it succeeded.)

    Get pvComObject of hoCertVault to vCertVault
    Get ComUseCertVault Of hoCert vCertVault To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoCert To sTemp1
        Showln sTemp1
        Get ComCloseSession Of hoPkcs11 To iSuccess
        Procedure_Return
    End

    // --------------------------------------------------------------------------
    // 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.
    Get ComLogout Of hoPkcs11 To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoPkcs11 To sTemp1
        Showln sTemp1
        Get ComCloseSession Of hoPkcs11 To iSuccess
        Procedure_Return
    End

    // When finished, close the session.
    // It is important to close the session (memory leaks will occur if the session is not properly closed).
    Get ComCloseSession Of hoPkcs11 To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoPkcs11 To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Showln "Success."


End_Procedure

 

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