(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.

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;
}

// Keys are exported in XML format:
$publicKeyXml = $rsa->exportPublicKey();
print $publicKeyXml . "\n";

$privateKeyXml = $rsa->exportPrivateKey();
print $privateKeyXml . "\n";

// Save the private key in PEM format:
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.PrivateKey')
$privKey = new COM("Chilkat.PrivateKey");
$success = $privKey->LoadXml($privateKeyXml);
$success = $privKey->SavePemFile('privateKey.pem');

// Save the public key in PEM format:
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.PublicKey')
$pubKey = new COM("Chilkat.PublicKey");
$success = $pubKey->LoadFromString($publicKeyXml);
$success = $pubKey->SavePemFile(0,'publicKey.pem');

?>