B4X

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. B4X

Dim success As Boolean = False

'  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.)
Dim privKey As ChilkatPrivateKey
privKey.Initialize("privKey")
success = privKey.LoadPemFile("qa_data/rsa/rsaPrivKey_pkcs8.pem")
If success = False Then
    Log(privKey.LastErrorText)
    Return
End If


Dim scmd As ChilkatScMinidriver
scmd.Initialize

'  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
Dim readerName As String = "Alcor Micro USB Smart Card Reader 0"
success = scmd.AcquireContext(readerName)
If success = False Then
    Log(scmd.LastErrorText)
    Return
End If


'  If successful, the name of the currently inserted smart card is available:
Log("Card name: " & scmd.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
Dim pinId As String = "user"
Dim retval As Int = scmd.PinAuthenticate(pinId, "0000")
If retval <> 0 Then
    Log("PIN Authentication failed.")
    scmd.DeleteContext
    Return
End If


'  Let's import into the "key exchange" position in key container #7.
success = scmd.ImportKey(7, "kex", privKey, "user")
If success = False Then
    Log("PIN Authentication failed.")
    scmd.DeleteContext
    Return
End If


scmd.DeleteContext

Log("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)