(PHP ActiveX) Generate RSA Key and Export to Encrypted PEM

PHP ActiveX sample showing how to generate an RSA key and export to encrypted PEM.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows Note: The php_com_dotnet.dll may need to be enabled inside of php.ini.

<?php

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

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Rsa')
$rsa = new COM("Chilkat.Rsa");

// Generate a 1024-bit key.  Chilkat RSA supports
// key sizes ranging from 512 bits to 4096 bits.
$success = $rsa->GenerateKey(1024);
if ($success != 1) {
    print $rsa->LastErrorText . "\n";
    exit;
}

// Get the private key as unencrypted XML:
$keyXml = $rsa->exportPrivateKey();
print $keyXml . "\n";

// To encrypt the key -- meaning to get the key in
// an encrypted PEM format -- load it into a PrivateKey object,
// and then export to encrypted PEM:
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.PrivateKey')
$privKey = new COM("Chilkat.PrivateKey");

$success = $privKey->LoadXml($keyXml);
if ($success != 1) {
    print $privKey->LastErrorText . "\n";
    exit;
}

$strEncPem = $privKey->getPkcs8EncryptedPem('myPassword');

// You now have the private key in an encrypted format,
// which may be (for example) saved to a database

?>