(Delphi ActiveX) FTPS with Mutual TLS Authentication (TLS Client Certificate)

Demonstrates how to do mutual TLS authentication (using a client certificate from a .pfx/.p12).

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
ftp: TChilkatFtp2;
cert: TChilkatCert;
success: Integer;

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

ftp := TChilkatFtp2.Create(Self);

ftp.Hostname := 'ftp.example.com';
ftp.Port := 21;

// If using implicit TLS, you probably want port 990..
ftp.Port := 990;

// Set this to 0 for implicit TLS, otherwise set to 1 for explicit TLS (where port is typically 21).
ftp.AuthTls := 0;

// Set this to 1 for implicit TLS, otherwise set to 0.
ftp.Ssl := 1;

cert := TChilkatCert.Create(Self);
success := cert.LoadPfxFile('qa_data/pfx/example.pfx','pfx_password');
if (success = 0) then
  begin
    Memo1.Lines.Add(cert.LastErrorText);
    Exit;
  end;

// Use this certificate for our TLS mutually authenticated connection:
success := ftp.SetSslClientCert(cert.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(cert.LastErrorText);
    Exit;
  end;

// Establish the TLS connection with the FTP server.
success := ftp.ConnectOnly();
if (success = 0) then
  begin
    Memo1.Lines.Add(ftp.LastErrorText);
    Exit;
  end;

// If a login is required, then login with the FTP account login/password.
ftp.Username := 'myLogin';
ftp.Password := 'myPassword';
success := ftp.LoginAfterConnectOnly();
if (success = 0) then
  begin
    Memo1.Lines.Add(ftp.LastErrorText);
    Exit;
  end;

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

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

success := ftp.Disconnect();
end;