Delphi ActiveX Requires Chilkat v10.1.2+

Secure FTP with Client Certificate

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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. Delphi ActiveX

var
success: Integer;
ftp: TChilkatFtp2;
certStore: TChilkatCertStore;
password: WideString;
jsonCN: TChilkatJsonObject;
cert: TChilkatCert;

begin
success := 0;

//  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;
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 := 1;

//  The Ssl property is for establishing an implicit SSL connection
//  on port 990.  Because this example uses explicit SSL, it 
//  should remain 0.
ftp.Ssl := 0;

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

password := '***';
//  Load the certs from a PFX into an in-memory certificate store:
success := certStore.LoadPfxFile('chilkat.pfx',password);
if (success <> 1) then
  begin
    Memo1.Lines.Add(certStore.LastErrorText);
    Exit;
  end;

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

cert := TChilkatCert.Create(Self);
success := certStore.FindCert(jsonCN.ControlInterface,cert.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add('Certificate not found!');
    Exit;
  end;

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

//  Connect and login to the FTP server.  The connection is 
//  made secure because of the AuthTls setting.
success := ftp.Connect();
if (success <> 1) then
  begin
    Memo1.Lines.Add(ftp.LastErrorText);
    Exit;
  end
else
  begin
    //  LastErrorText contains information even when
    //  successful. This allows you to visually verify
    //  that the secure connection actually occurred.
    Memo1.Lines.Add(ftp.LastErrorText);
  end;

Memo1.Lines.Add('Secure FTP Channel Established!');

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

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

success := ftp.Disconnect();