Secure FTP with Client Certificate

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.

Download 32-bit Chilkat FTP2 ActiveX (.msi)

Download All 32-bit Chilkat ActiveX Components (.zip)

Download All 64-bit Chilkat ActiveX Components (.zip)

<?php

$ftp = new COM("Chilkat.Ftp2");

//  Any string unlocks the component for the 1st 30-days.
$success = $ftp->UnlockComponent('Anything for 30-day trial');
if ($success != true) {
    print $ftp->lastErrorText() . "\n";
    exit;
}

$ftp->Hostname = 'ftp.***.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 0.
$ftp->Ssl = false;

//  Load a certificate from a .pfx
//  A PFX may contain several certs, including the certificates
//  in a chain of authority.
$certStore = new COM("Chilkat.CertStore");

$password = '***';
//  Load the certs from a PFX into an in-memory certificate store:
$success = $certStore->LoadPfxFile('chilkat.pfx',$password);
if ($success != true) {
    print $certStore->lastErrorText() . "\n";
    exit;
}

//  Find the exact cert we'll use:

// cert is a Chilkat.Cert
$cert = $certStore->FindCertBySubject('Chilkat Software, Inc.');
if (is_null($cert)) {
    print 'Certificate not found!' . "\n";
    exit;
}

//  Use this certificate for our secure (SSL/TLS) connection:
$ftp->SetSslClientCert($cert);

//  Connect and login to the FTP server.  The connection is
//  made secure because of the AuthTls setting.
$success = $ftp->Connect();
if ($success != true) {
    print $ftp->lastErrorText() . "\n";
    exit;
}
else {
    //  LastErrorText contains information even when
    //  successful. This allows you to visually verify
    //  that the secure connection actually occurred.
    print $ftp->lastErrorText() . "\n";
}

print 'Secure FTP Channel Established!' . "\n";

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

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

$ftp->Disconnect();
?>