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

PHP Extension 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.

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<?php

include("chilkat.php");

$success = false;

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

$rsa = new CkRsa();

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

$pubKey = new CkPublicKey();
$privKey->ToPublicKey($pubKey);

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

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

print 'Success.' . "\n";

?>