PHP Extension

Duplicate openssl pkcs12 –export –in certfile.cer –inkey certfile.key –out certfile.pfx

See more OpenSSL Examples

How to create a PKCS12 (.p12 or .pfx) from a certificate file and private key file: Demonstrates how to duplicate this OpenSSL command:

Duplicate openssl pkcs12 –export –in certfile.cer –inkey certfile.key –out certfile.pfx

PHP Extension

<?php

include("chilkat.php");

$success = false;

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

$pkey = new CkPrivateKey();

// Load the private key from the file.
$success = $pkey->LoadAnyFormatFile('certFile.key','');
if ($success != true) {
    print $pkey->lastErrorText() . "\n";
    exit;
}

$cert = new CkCert();
// The LoadFromFile method auto-recognizes the format...
$success = $cert->LoadFromFile('certfile.cer');
if ($success != true) {
    print $cert->lastErrorText() . "\n";
    exit;
}

// We'll need a cert chain object to create the PKCS12, so get it
// from the cert.  

// certChain is a CkCertChain
$certChain = $cert->GetCertChain();
if (!$cert->get_LastMethodSuccess()) {
    print $cert->lastErrorText() . "\n";
    exit;
}

// Create the PFX object, add the cert and private key, and write to a .pfx file.
$pfx = new CkPfx();

// The cert(s) are automatically added in the call to AddPrivateKey
$success = $pfx->AddPrivateKey($pkey,$certChain);
if ($success != true) {
    print $pfx->lastErrorText() . "\n";
    exit;
}

// Write the .pfx to a file.
$password = 'myPassword';
$success = $pfx->ToFile($password,'certfile.pfx');
if ($success != true) {
    print $pfx->lastErrorText() . "\n";
    exit;
}

print 'Success.' . "\n";

?>