(PHP ActiveX) Generate RSA Public/Private Key Pair and Export to PEM

PHP ActiveX example code showing how to generate an RSA public/private key pair and export to PEM files.

Note: This example requires Chilkat v11.0.0 or greater.

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

$success = 0;

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

$rsa = new COM("Chilkat.Rsa");

// Generate a 2048-bit key.  Chilkat RSA supports
// key sizes ranging from 512 bits to 8192 bits.
$privKey = new COM("Chilkat.PrivateKey");
$success = $rsa->GenKey(2048,$privKey);
if ($success == 0) {
    print $rsa->LastErrorText . "\n";
    exit;
}

$pubKey = new COM("Chilkat.PublicKey");
$privKey->ToPublicKey($pubKey);

// Save the private key in PEM format:
$success = $privKey->SavePemFile('privateKey.pem');
if ($success == 0) {
    print $privKey->LastErrorText . "\n";
    exit;
}

// Save the public key in PEM format:
$success = $pubKey->SavePemFile(0,'publicKey.pem');
if ($success == 0) {
    print $pubKey->LastErrorText . "\n";
    exit;
}

print 'Success.' . "\n";

?>