Delphi DLL

ScMinidriver - Change Smart Card PIN (or USB token PIN)

See more ScMinidriver Examples

Demonstrates how to change the PIN for a smart card or USB token. Delphi DLL

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
scmd: HCkScMinidriver;
readerName: PWideChar;
currentPin: PWideChar;
newPin: PWideChar;
retval: Integer;

begin
success := False;

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

scmd := CkScMinidriver_Create();

// 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 := CkScMinidriver_AcquireContext(scmd,readerName);
if (success = False) then
  begin
    Memo1.Lines.Add(CkScMinidriver__lastErrorText(scmd));
    Exit;
  end;

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

// Change the "user" PIN.  (Typically, you'll always be using the "user" PIN.)
currentPin := '0000';
newPin := '1234';
retval := CkScMinidriver_PinChange(scmd,'user',currentPin,newPin);
if (retval = -1) then
  begin
    Memo1.Lines.Add('The PIN is already blocked.');
    Exit;
  end;
if (retval = -2) then
  begin
    Memo1.Lines.Add('The PinChange function failed for some unanticipated reason');
    Memo1.Lines.Add(CkScMinidriver__lastErrorText(scmd));
    Exit;
  end;
if (retval = 0) then
  begin
    Memo1.Lines.Add('PIN successfully changed.');
  end
else
  begin
    Memo1.Lines.Add('Current PIN is incorrect.');
    Memo1.Lines.Add('Number of attempts remaining = ' + IntToStr(retval));
  end;

CkScMinidriver_DeleteContext(scmd);

CkScMinidriver_Dispose(scmd);

end;