AutoIt

Load Certificate from Smart Card by Key Usage

See more Certificates Examples

You may have a smartcard or USB token that contains only 2 certificates, one for signing, and one for authentication, and you wish to load the certificate for signing. This example demonstrates how to load the 1st certificate found on a smartcard that matches the intended key usage. AutoIt

Local $bSuccess = False

; This example requires the Chilkat API to have been previously unlocked.
; See Global Unlock Sample for sample code.

$oCert = ObjCreate("Chilkat.Cert")

; If you know the smart card PIN, set it prior to loading from the smartcard/USB token.
$oCert.SmartCardPin = "12345678"

; To load a certificate matching an intended key usage, specify the type of usage as shown below.
; 
; The possible key usage keywords are:
; 
; digitalsignature
; Use when the public key is used with a digital signature mechanism to support security services other than non-repudiation, certificate signing, or CRL signing. 
; A digital signature is often used for entity authentication and data origin authentication with integrity.

; nonrepudiation
; When a digital certificate's key usage includes "nonrepudiation," it implies that the certificate and its associated private key can be used to 
; create digital signatures that provide proof of the origin and integrity of the signed data, and the signer cannot later deny having signed the data.

; Other less common usages:

; certificatesigning
; keyencipherment
; dataencipherment
; crlsigning
; secureemail
; serverauthentication
; clientauthentication
; codesigning
; timestamping

$bSuccess = $oCert.LoadFromSmartcard("keyusage=nonrepudiation")
If ($bSuccess = False) Then
    ConsoleWrite($oCert.LastErrorText & @CRLF)
    ConsoleWrite("Certificate not loaded." & @CRLF)
    Exit
EndIf

ConsoleWrite("Found: " & $oCert.SubjectDN & " serial=" & $oCert.SerialNumber & @CRLF)