Pascal (Lazarus/Delphi)

PC/SC Get Card UID

See more SCard Examples

Sends the APDU command to get a card's UID. Pascal (Lazarus/Delphi)

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.BinData,
  Chilkat.SCard;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  scard: TSCard;
  bdRecv: TBinData;
  numBytes: Integer;

begin
  success := False;

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

  scard := TSCard.Create;

  //  First establish a context to the PC/SC Resource Manager
  success := scard.EstablishContext('user');
  if (success = False) then
    begin
      WriteLn(scard.LastErrorText);
      Exit;
    end;

  //  Use your own smart card reader name here.
  success := scard.Connect('ACS ACR122 0','shared','no_preference');
  if (success = False) then
    begin
      WriteLn(scard.LastErrorText);
      Exit;
    end;

  WriteLn('Connected reader: ' + scard.ConnectedReader);
  WriteLn('Active protocol: ' + scard.ActiveProtocol);
  WriteLn('ATR: ' + scard.CardAtr);
  WriteLn('Reader Status: ' + scard.ReaderStatus);

  //   Send the APDU command 0xFF, 0xCA, 0x00, 0x00, 0x00
  bdRecv := TBinData.Create;
  success := scard.TransmitHex(scard.ActiveProtocol,'FFCA000000',bdRecv,32);
  if (success = True) then
    begin

      WriteLn('Received: ' + bdRecv.GetEncoded('hex'));

      //  The UID is the returned data without the final 2 bytes.
      numBytes := bdRecv.NumBytes;
      if (numBytes > 2) then
        begin
          WriteLn('UID: ' + bdRecv.GetEncodedChunk(0,numBytes - 2,'hex'));
        end;

    end
  else
    begin
      WriteLn(scard.LastErrorText);
    end;

  //  Disconnect from this reader.
  success := scard.Disconnect('leave');
  if (success = False) then
    begin
      WriteLn(scard.LastErrorText);
    end;

  //  Applications should always release the context when finished.
  success := scard.ReleaseContext();
  if (success = False) then
    begin
      WriteLn(scard.LastErrorText);
    end;


  scard.Free;
  bdRecv.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.