(PureBasic) ScMinidriver - Load Certificate from Smart Card or USB Token by Index

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Demonstrates how to load a certificate located on a smart card or USB token by key container index.

Chilkat PureBasic Module Download Chilkat PureBasic Module

IncludeFile "CkCert.pb"
IncludeFile "CkScMinidriver.pb"

Procedure ChilkatExample()

    ; This example requires the Chilkat API to have been previously unlocked.
    ; See Global Unlock Sample for sample code.
    scmd.i = CkScMinidriver::ckCreate()
    If scmd.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    ; Reader names (smart card readers or USB tokens) can be discovered
    ; via List Readers or Find Smart Cards
    readerName.s = "SCM Microsystems Inc. SCR33x USB Smart Card Reader 0"
    success.i = CkScMinidriver::ckAcquireContext(scmd,readerName)
    If success = 0
        Debug CkScMinidriver::ckLastErrorText(scmd)
        CkScMinidriver::ckDispose(scmd)
        ProcedureReturn
    EndIf

    ; If successful, the name of the currently inserted smart card is available:
    Debug "Card name: " + CkScMinidriver::ckCardName(scmd)

    ; If desired, perform regular PIN authentication with the smartcard.
    ; For more details about smart card PIN authentication, see the Smart Card PIN Authentication Example
    retval.i = CkScMinidriver::ckPinAuthenticate(scmd,"user","000000")
    If retval <> 0
        Debug "PIN Authentication failed."
    EndIf

    cert.i = CkCert::ckCreate()
    If cert.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    ; We can pass a specific key container index, or -1 to locate the 1st non-empty container containing a certificate and private key.
    keyContainerIndex.i = -1
    ; keySpec can be "kex" or "sig" to indicate the key-exchange or signature position within the container.
    ; keySpec can also be "any" to accept either position, with preference given to the "sig" position if both are occupied.
    keySpec.s = "any"
    success = CkScMinidriver::ckGetCert(scmd,keyContainerIndex,keySpec,cert)
    If success = 0
        Debug "Failed to load the certificate."
    Else
        Debug "Successfully loaded the cert object from the smart card / USB token."

        ; Note: When successful, the cert object is internally linked to the ScMinidriver object's authenticated session.
        ; The cert object can now be used to sign or do other cryptographic operations that occur on the smart card / USB token.
        ; If your application calls PinDeauthenticate or DeleteContext, the cert will no longer be able to sign on the smart card
        ; because the smart card ScMinidriver session will no longer be authenticated or deleted.
    EndIf

    ; ...
    ; ...
    ; ...

    ; When finished with operations that required authentication, you may if you wish, deauthenticate the session.
    success = CkScMinidriver::ckPinDeauthenticate(scmd,"user")
    If success = 0
        Debug CkScMinidriver::ckLastErrorText(scmd)
    EndIf

    ; Delete the context when finished with the card.
    success = CkScMinidriver::ckDeleteContext(scmd)
    If success = 0
        Debug CkScMinidriver::ckLastErrorText(scmd)
    EndIf



    CkScMinidriver::ckDispose(scmd)
    CkCert::ckDispose(cert)


    ProcedureReturn
EndProcedure