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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.

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Local $bSuccess = 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.

$oPkcs11 = ObjCreate("Chilkat.Pkcs11")

;  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.
$oPkcs11.SharedLibPath = "bit4xpki.dll"

$bSuccess = $oPkcs11.Initialize()
If ($bSuccess = False) Then
    ConsoleWrite($oPkcs11.LastErrorText & @CRLF)
    Exit
EndIf

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

;  Open a session.
Local $bReadWrite = True
$bSuccess = $oPkcs11.OpenSession($iSlotID,$bReadWrite)
If ($bSuccess = False) Then
    ConsoleWrite($oPkcs11.LastErrorText & @CRLF)
    Exit
EndIf

;  Make it an authenticated session by calling Login.
Local $iUserType = 1
;  Make sure to use the correct PIN for your smart card..
Local $sPin = "0000"
$bSuccess = $oPkcs11.Login($iUserType,$sPin)
If ($bSuccess = False) Then
    ConsoleWrite($oPkcs11.LastErrorText & @CRLF)
    $bSuccess = $oPkcs11.CloseSession()
    Exit
EndIf

;  Get the certificate (on the smart card) that has a private key.
$oCert = ObjCreate("Chilkat.Cert")
$bSuccess = $oPkcs11.FindCert("privateKey","",$oCert)
If ($bSuccess = True) Then
    ConsoleWrite("Cert with private key: " & $oCert.SubjectCN & @CRLF)
Else
    ConsoleWrite("No certificates having a private key were found." & @CRLF)
    $bSuccess = $oPkcs11.CloseSession()
    Exit
EndIf

;  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:

$oCertVault = ObjCreate("Chilkat.XmlCertVault")
;  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..
$bSuccess = $oCertVault.AddCertFile("someDir/caIntermediateCert.cer")
;  ...
$bSuccess = $oCertVault.AddCertFile("someDir/caCert.cer")
;  (Your code should check the return value to make sure it succeeded.)

$bSuccess = $oCert.UseCertVault($oCertVault)
If ($bSuccess = False) Then
    ConsoleWrite($oCert.LastErrorText & @CRLF)
    $bSuccess = $oPkcs11.CloseSession()
    Exit
EndIf

;  --------------------------------------------------------------------------
;  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.
$bSuccess = $oPkcs11.Logout()
If ($bSuccess = False) Then
    ConsoleWrite($oPkcs11.LastErrorText & @CRLF)
    $bSuccess = $oPkcs11.CloseSession()
    Exit
EndIf

;  When finished, close the session.
;  It is important to close the session (memory leaks will occur if the session is not properly closed).
$bSuccess = $oPkcs11.CloseSession()
If ($bSuccess = False) Then
    ConsoleWrite($oPkcs11.LastErrorText & @CRLF)
    Exit
EndIf

ConsoleWrite("Success." & @CRLF)