(PHP Extension) 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.

Chilkat PHP Downloads PHP Extension for Windows, Linux, MacOS, Alpine Linux, Solaris

<?php

// The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number.
// For example, if using Chilkat v9.5.0.48, then include as shown here:
include("chilkat_9_5_0.php");

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

$ftp = new CkFtp2();

$ftp->put_Hostname('ftp.***.com');
$ftp->put_Port(21);
$ftp->put_Username('test');
$ftp->put_Password('test');

// This example will use explict TLS/SSL.
// Establish an explicit secure channel after connection
// on the standard FTP port 21.
$ftp->put_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->put_Ssl(false);

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

$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 CkCert
$cert = $certStore->FindCertBySubject('Chilkat Software, Inc.');
if ($certStore->get_LastMethodSuccess() == false) {
    print 'Certificate not found!' . "\n";
    exit;
}

// 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) {
    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...

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

$success = $ftp->Disconnect();

?>