Delphi ActiveX

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). Delphi ActiveX

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Integer;
scmd: TChilkatScMinidriver;
readerName: WideString;
pinId: WideString;
retval: Integer;

begin
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)

scmd := TChilkatScMinidriver.Create(Self);

// 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
readerName := 'Alcor Micro USB Smart Card Reader 0';
success := scmd.AcquireContext(readerName);
if (success = 0) then
  begin
    Memo1.Lines.Add(scmd.LastErrorText);
    Exit;
  end;

// If successful, the name of the currently inserted smart card is available:
Memo1.Lines.Add('Card name: ' + scmd.CardName);

// 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
pinId := 'user';
retval := scmd.PinAuthenticate(pinId,'0000');
if (retval <> 0) then
  begin
    Memo1.Lines.Add('PIN Authentication failed.');
    scmd.DeleteContext();
    Exit;
  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.)
success := scmd.DeleteKeyContainer(7);
if (success = 0) then
  begin
    Memo1.Lines.Add(scmd.LastErrorText);
    scmd.DeleteContext();
    Exit;
  end;

scmd.DeleteContext();
Memo1.Lines.Add('Successfully delete the contents of key container #7');
end;