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PKCS11 Find Specific Certificate on Smart Card or USB Token

See more PKCS11 Examples

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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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")

;  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)
$oPkcs11.SharedLibPath = "C:/Program Files (x86)/Gemalto/IDGo 800 PKCS#11/IDPrimePKCS1164.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.
;  
;  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".
Local $iUserType = 1
Local $sPin = "0000"
$bSuccess = $oPkcs11.Login($iUserType,$sPin)
If ($bSuccess = False) Then
    ConsoleWrite($oPkcs11.LastErrorText & @CRLF)
    $bSuccess = $oPkcs11.CloseSession()
    Exit
EndIf

;  --------------------------------------------------------------------------
;  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:
$oCert = ObjCreate("Chilkat.Cert")
;  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.
$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)
EndIf

;  2) Find a certificate by the Subject Common Name
$bSuccess = $oPkcs11.FindCert("subjectCN","Chil application account (8c9be8e0-5544-4cd0-9062-290fbff353a7)",$oCert)
If ($bSuccess = True) Then
    ConsoleWrite("Found: " & $oCert.SubjectCN & @CRLF)
Else
    ConsoleWrite("Not found: " & $oCert.SubjectCN & @CRLF)
EndIf

;  3) Find a certificate by hex serial number
$bSuccess = $oPkcs11.FindCert("serial","5087bf1feda006af54a02f23a851104948acc26f",$oCert)
If ($bSuccess = True) Then
    ConsoleWrite("Found: " & $oCert.SerialNumber & @CRLF)
Else
    ConsoleWrite("Not found: " & $oCert.SerialNumber & @CRLF)
EndIf

;  4) Find a certificate by hex serial number and Issuer Common Name
$bSuccess = $oPkcs11.FindCert("serial:issuerCN","5087bf1feda006af54a02f23a851104948acc26f:Ibanity Production Third Party Application CA",$oCert)
If ($bSuccess = True) Then
    ConsoleWrite("Found: " & $oCert.SubjectCN & @CRLF)
Else
    ConsoleWrite("Not found: " & $oCert.SubjectCN & @CRLF)
EndIf

;  --------------------------------------------------------------------------

;  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)