Visual FoxPro

ScMinidriver - Import Private Key to Smart Card

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Demonstrates how to import a private key to the "signature" or "key exchange" location in the Nth key container on a smart card. Visual FoxPro

LOCAL lnSuccess
LOCAL loPrivKey
LOCAL loScmd
LOCAL lcReaderName
LOCAL lcPinId
LOCAL lnRetval

lnSuccess = 0

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

*  Chilkat recommends the following free tool for interactively examining the contents of your smart card
*  through the ScMinidriver interface:  MGTEK Tool for Minidriver enabled Smart Cards

*  Let's first look at our smart card before importing a private key.
*  Here's the view of our Gemalto (Thales) IDPrime MD T=0 smart card in the MGTEK tool:

*  (image:https://example-code.com/images/gemalto_idprime_md_t0.JPG/endImage)

*  First let's load a private key into the Chilkat private key object.
*  (Chilkat provides the ability to load private keys from many different sources and formats.
*  this example loads from a PEM file.)
loPrivKey = CreateObject('Chilkat.PrivateKey')
lnSuccess = loPrivKey.LoadPemFile("qa_data/rsa/rsaPrivKey_pkcs8.pem")
IF (lnSuccess = 0) THEN
    ? loPrivKey.LastErrorText
    RELEASE loPrivKey
    CANCEL
ENDIF

loScmd = CreateObject('Chilkat.ScMinidriver')

*  First we need to acquire a context to the smart card in the reader where it is inserted.
*  Reader names (smart card readers or USB tokens) can be discovered
*  via List Readers or Find Smart Cards
lcReaderName = "Alcor Micro USB Smart Card Reader 0"
lnSuccess = loScmd.AcquireContext(lcReaderName)
IF (lnSuccess = 0) THEN
    ? loScmd.LastErrorText
    RELEASE loPrivKey
    RELEASE loScmd
    CANCEL
ENDIF

*  If successful, the name of the currently inserted smart card is available:
? "Card name: " + loScmd.CardName

*  To import a private key, we'll need to be PIN authenticated.
*  For more details about smart card PIN authentication, see the Smart Card PIN Authentication Example
lcPinId = "user"
lnRetval = loScmd.PinAuthenticate(lcPinId,"0000")
IF (lnRetval <> 0) THEN
    ? "PIN Authentication failed."
    loScmd.DeleteContext()
    RELEASE loPrivKey
    RELEASE loScmd
    CANCEL
ENDIF

*  Let's import into the "key exchange" position in key container #7.
lnSuccess = loScmd.ImportKey(7,"kex",loPrivKey,"user")
IF (lnSuccess = 0) THEN
    ? "PIN Authentication failed."
    loScmd.DeleteContext()
    RELEASE loPrivKey
    RELEASE loScmd
    CANCEL
ENDIF

loScmd.DeleteContext()

? "Success."

*  Here's the MGTEK view of the smart card after importing the private key:
*  (image:https://example-code.com/images/gemalto_idprime_after_key_import.JPG/endImage)

RELEASE loPrivKey
RELEASE loScmd