Pascal (Lazarus/Delphi)

Secure FTP with Client Certificate

See more FTP Examples

Chilkat FTP2 provides the ability to use a client certificate with secure FTP (implicit or explicit SSL/TLS). This example demonstrates how to load a certificate from a .pfx and use it as the client-side SSL cert. Note: Client-side certificates are only needed in situations where the server demands one. 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.Cert,
  Chilkat.Ftp2,
  Chilkat.CertStore,
  Chilkat.JsonObject;

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

procedure RunDemo;
var
  success: Boolean;
  ftp: TFtp2;
  certStore: TCertStore;
  password: string;
  jsonCN: TJsonObject;
  cert: TCert;

begin
  success := False;

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

  ftp := TFtp2.Create;

  ftp.Hostname := 'ftp.example.com';
  ftp.Port := 21;
  ftp.Username := 'test';
  ftp.Password := 'test';

  //  This example will use explict TLS/SSL.
  //  Establish an explicit secure channel after connection
  //  on the standard FTP port 21.
  ftp.AuthTls := True;

  //  The Ssl property is for establishing an implicit SSL connection
  //  on port 990.  Because this example uses explicit SSL, it 
  //  should remain False.
  ftp.Ssl := False;

  //  Load a certificate from a .pfx
  //  A PFX may contain several certs, including the certificates
  //  in a chain of authority.
  certStore := TCertStore.Create;

  password := '***';
  //  Load the certs from a PFX into an in-memory certificate store:
  success := certStore.LoadPfxFile('chilkat.pfx',password);
  if (success <> True) then
    begin
      WriteLn(certStore.LastErrorText);
      Exit;
    end;

  //  Find the desired certificate.
  jsonCN := TJsonObject.Create;
  jsonCN.UpdateString('CN','cert common name');

  cert := TCert.Create;
  success := certStore.FindCert(jsonCN,cert);
  if (success = False) then
    begin
      WriteLn('Certificate not found!');
      Exit;
    end;

  //  Use this certificate for our secure (SSL/TLS) connection:
  success := ftp.SetSslClientCert(cert);

  //  Connect and login to the FTP server.  The connection is 
  //  made secure because of the AuthTls setting.
  success := ftp.Connect();
  if (success <> True) then
    begin
      WriteLn(ftp.LastErrorText);
      Exit;
    end
  else
    begin
      //  LastErrorText contains information even when
      //  successful. This allows you to visually verify
      //  that the secure connection actually occurred.
      WriteLn(ftp.LastErrorText);
    end;

  WriteLn('Secure FTP Channel Established!');

  //  Do whatever you're doing to do ...
  //  upload files, download files, etc...

  //  .....
  //  .....

  success := ftp.Disconnect();


  ftp.Free;
  certStore.Free;
  jsonCN.Free;
  cert.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.