Delphi DLL Requires Chilkat v10.1.2+

Using WS_FTP Self-signed Certificate file (.crt) and Private Key File. (.key)

See more FTP Examples

Demonstrates how to use a self-signed certificate created by WS_FTP with Chilkat FTP2.

Note: It is usually not necessary for the FTP client to use a client-side certificate. Most FTP servers using SSL and TLS connections (explicit or implicit) do not require client-side certs. In addition, some high-security FTP servers require "real" certificates -- meaning certificates issued by a real certificate authority with a chain of authentication that leads to a trusted root certificate. The certificates created by WS_FTP are self-signed and untrusted.

Delphi DLL

var
success: Boolean;
ftp: HCkFtp2;
certStore: HCkCertStore;
jsonCN: HCkJsonObject;
cert: HCkCert;

begin
success := False;

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

//  Important:  Before running this program, convert your
//  .crt and .key files to a .p12 using OpenSSL:
//  The command is this:
//  openssl pkcs12 -export -in test.crt -inkey test.key -out test.p12
//  

ftp := CkFtp2_Create();

CkFtp2_putHostname(ftp,'ftp.example.com');
CkFtp2_putPort(ftp,21);
CkFtp2_putUsername(ftp,'testLogin');
CkFtp2_putPassword(ftp,'testPassword');

//  This example will use explict TLS/SSL.
//  Establish an explicit secure channel after connection
//  on the standard FTP port 21.
CkFtp2_putAuthTls(ftp,True);

//  The Ssl property is for establishing an implicit SSL connection
//  on port 990.  Because this example uses explicit SSL, it 
//  should remain 0.
CkFtp2_putSsl(ftp,False);

//  Create an instance of a certificate store object, load a .p12 file,
//  locate the certificate we need, and use it for signing.
//  (a P12/PFX file may contain more than one certificate.)
certStore := CkCertStore_Create();
//  The 1st argument is the filename, the 2nd arg is the 
//  .p12 file's password.  (OpenSSL will prompty you to set a password
//  when converting the .crt and .key into a .p12).
success := CkCertStore_LoadPfxFile(certStore,'test.p12','secret');
if (success <> True) then
  begin
    Memo1.Lines.Add(CkCertStore__lastErrorText(certStore));
    Exit;
  end;

jsonCN := CkJsonObject_Create();
CkJsonObject_UpdateString(jsonCN,'CN','cert common name');

cert := CkCert_Create();
success := CkCertStore_FindCert(certStore,jsonCN,cert);
if (success = False) then
  begin
    Memo1.Lines.Add(CkCertStore__lastErrorText(certStore));
    Exit;
  end;

success := CkFtp2_SetSslClientCert(ftp,cert);

//  Connect and login to the FTP server.
success := CkFtp2_Connect(ftp);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkFtp2__lastErrorText(ftp));
    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(CkFtp2__lastErrorText(ftp));
  end;

Memo1.Lines.Add('Secure FTP Channel Established!');
Memo1.Lines.Add(CkFtp2__lastErrorText(ftp));

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

//  ...
//  ...

success := CkFtp2_Disconnect(ftp);

CkFtp2_Dispose(ftp);
CkCertStore_Dispose(certStore);
CkJsonObject_Dispose(jsonCN);
CkCert_Dispose(cert);