SQL Server

ScMinidriver - Delete Smart Card Key Container

See more ScMinidriver Examples

Demonstrates how to delete the contents of a key container on a smart card (or USB token). SQL Server

-- Important: See this note about string length limitations for strings returned by sp_OAMethod calls.
--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @success int
    SELECT @success = 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..
    -- Here's the view of the card we happen to be using: a Gemalto (Thales) IDPrime MD T=0 smart card.

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

    DECLARE @scmd int
    EXEC @hr = sp_OACreate 'Chilkat.ScMinidriver', @scmd OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    -- 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
    DECLARE @readerName nvarchar(4000)
    SELECT @readerName = 'Alcor Micro USB Smart Card Reader 0'
    EXEC sp_OAMethod @scmd, 'AcquireContext', @success OUT, @readerName
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @scmd, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @scmd
        RETURN
      END

    -- If successful, the name of the currently inserted smart card is available:

    EXEC sp_OAGetProperty @scmd, 'CardName', @sTmp0 OUT
    PRINT 'Card name: ' + @sTmp0

    -- To delete the contents of a key container, we'll need to be PIN authenticated..

    -- For more details about smart card PIN authentication, see the Smart Card PIN Authentication Example
    DECLARE @pinId nvarchar(4000)
    SELECT @pinId = 'user'
    DECLARE @retval int
    EXEC sp_OAMethod @scmd, 'PinAuthenticate', @retval OUT, @pinId, '0000'
    IF @retval <> 0
      BEGIN

        PRINT 'PIN Authentication failed.'
        EXEC sp_OAMethod @scmd, 'DeleteContext', @success OUT
        EXEC @hr = sp_OADestroy @scmd
        RETURN
      END

    -- Let's delete the contents of key container #7
    -- This deletes both keys (signature key and "key exchange" key) that might be present in the key container.
    -- (It is not possible to delete just one or the other.)
    EXEC sp_OAMethod @scmd, 'DeleteKeyContainer', @success OUT, 7
    IF @success = 0
      BEGIN
        EXEC sp_OAGetProperty @scmd, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC sp_OAMethod @scmd, 'DeleteContext', @success OUT
        EXEC @hr = sp_OADestroy @scmd
        RETURN
      END

    EXEC sp_OAMethod @scmd, 'DeleteContext', @success OUT

    PRINT 'Successfully delete the contents of key container #7'

    EXEC @hr = sp_OADestroy @scmd


END
GO