(Lianja) ScMinidriver - PIN Authentication for Smart Card or USB Token

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Demonstrates how to PIN authenticate with a connected smart card or USB token.

Note: This functionality was introduced in Chilkat v9.5.0.87.

Note: The ScMinidriver functionality is for Windows-only because ScMinidriver DLLs only exist on Windows. In the next version, Chilkat will be releasing a Pkcs11 class to support Linux, MacOSX, and possibly other operating systems.

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

loScmd = createobject("CkScMinidriver")

// 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"
llSuccess = loScmd.AcquireContext(lcReaderName)
if (llSuccess = .F.) then
    ? loScmd.LastErrorText
    release loScmd
    return
endif

// If we are successful, the name of the currently inserted smart card is available:
lcCardName = loScmd.CardName
? "Card name: " + lcCardName

// Perform regular PIN authentication with the smartcard.
// If authentication is successful, then the ScMinidriver session is authenticated and
// operations such as signing are permissible.

// The pin ID can be "user", "admin", or a number "3" through "7" (passed as a string).
// The possible pin ID's for a given smartcard are obtained via the GetCardProperties method.
// See Get Smart Card Properties for sample code.
// You should generally use the "user" pin ID.  You would only use the other pin ID's for very specific purposes.
lcPinId = "user"

// Change this to the PIN for your smart card.
lcPin = "0000"

lnRetval = loScmd.PinAuthenticate(lcPinId,lcPin)

// The return value is 0 for success.
// If the retval is greater than 0, it is the number of attempts remaining before the PIN is blocked.
// If the retval equals -1, then something else went wrong and you should consult the LastErrorText.
if (lnRetval < 0) then
    ? loScmd.LastErrorText
    release loScmd
    return
endif

if (lnRetval > 0) then
    ? "PIN authentcation failed, " + str(lnRetval) + " attempts remaining before the PIN is blocked."
else
    ? "PIN authentication successful. Your session is now authenticated and you may proceed with operations such as signing."
endif

// ...
// ...
// ...

// You may deauthenticate the session when finished with operations that required authentication.
llSuccess = loScmd.PinDeauthenticate(lcPinId)
if (llSuccess = .F.) then
    ? loScmd.LastErrorText
endif

// Delete the context when finished with the card.
llSuccess = loScmd.DeleteContext()
if (llSuccess = .F.) then
    ? loScmd.LastErrorText
endif



release loScmd