(Delphi ActiveX) Validate a Smartcard PIN

Validates a smartcard PIN. This example only runs on Windows and requires Chilkat v9.5.0.77 or greater.

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

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
cert: TChilkatCert;
success: Integer;
pinValid: Integer;

begin
// Note: Requires Chilkat v9.5.0.77 or greater.

cert := TChilkatCert.Create(Self);

cert.SmartCardPin := '000000';

// Load the certificate on the smartcard currently in the reader (or on the USB token).
// Pass an empty string to allow Chilkat to automatically choose the CSP (Cryptographi Service Provider).
// See Load Certificate on Smartcard for information about explicitly selecting a particular CSP.
success := cert.LoadFromSmartcard('');
if (success <> 1) then
  begin
    Memo1.Lines.Add(cert.LastErrorText);
    Exit;
  end;

// Check to see if the SmartCardPin property contains the valid PIN for the smartcard.
pinValid := cert.CheckSmartCardPin();
if (pinValid < 0) then
  begin
    Memo1.Lines.Add('Unable to check the PIN validity.');
    Memo1.Lines.Add(cert.LastErrorText);
    Exit;
  end;

if (pinValid = 1) then
  begin
    Memo1.Lines.Add('PIN is valid.');
  end
else
  begin
    Memo1.Lines.Add('PIN is invalid.');
  end;
end;