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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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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)