Pascal (Lazarus/Delphi)

PC/SC List Smart Card Readers (and USB Tokens)

See more SCard Examples

Demonstrates how to list the smart card readers and USB tokens connected to the computer.

Note: This functionality was introduced in Chilkat v9.5.0.87.

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.StringTable,
  Chilkat.SCard;

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

procedure RunDemo;
var
  success: Boolean;
  scard: TSCard;
  stReaders: TStringTable;
  numReaders: Integer;
  i: 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;

  stReaders := TStringTable.Create;
  success := scard.ListReaders(stReaders);
  if (success = False) then
    begin
      WriteLn(scard.LastErrorText);
      Exit;
    end;

  numReaders := stReaders.Count;
  i := 0;
  while i < numReaders do
    begin
      WriteLn(i + ': ' + stReaders.StringAt(i));
      i := i + 1;
    end;

  //  Sample output:
  //  0: Alcor Micro USB Smart Card Reader 0
  //  1: FS USB Token 0
  //  2: FT Java Token 0
  //  3: SCM Microsystems Inc. SCR33x USB Smart Card Reader 0
  //  4: Yubico YubiKey OTP+FIDO+CCID 0

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


  scard.Free;
  stReaders.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.