(PHP Extension) Write PKCS1 or PKCS8 Public Key PEM

Demonstrates how to write either PKCS1 or PKCS8 format PEM files. PKCS1 public keys have this PEM format:

-----BEGIN RSA PUBLIC KEY-----
BASE64 ENCODED DATA
-----END RSA PUBLIC KEY-----

-----BEGIN PUBLIC KEY-----
BASE64 ENCODED DATA
-----END PUBLIC KEY-----

Chilkat PHP Downloads PHP Extension for Windows, Linux, MacOS, Alpine Linux, Solaris

<?php

// The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number.
// For example, if using Chilkat v9.5.0.48, then include as shown here:
include("chilkat_9_5_0.php");

// Unlock the Chilkat API.
// Starting in v9.5.0.49, all Chilkat classes can be unlocked at once at the beginning of a program
// by calling UnlockBundle.  It requires a Bundle unlock code.
$chilkatGlob = new CkGlobal();
$success = $chilkatGlob->UnlockBundle('Anything for 30-day trial.');
if ($success != true) {
    print $chilkatGlob->lastErrorText() . "\n";
    exit;
}

$pem = new CkPem();

// Load a public key from a PEM file.
// (Assume the PEM contains at least one public key..)
$success = $pem->LoadPemFile('/Users/chilkat/testData/pem/myPublicKey.pem');
if ($success != true) {
    print $pem->lastErrorText() . "\n";
    exit;
}

$numPublicKeys = $pem->get_NumPublicKeys();
if ($numPublicKeys == 0) {
    print (('Error: Expected the PEM to contain public keys.')) . "\n";
    exit;
}

// Get each public key as PEM, first in PKCS1 format, then in PKCS8.
for ($i = 1; $i <= $numPublicKeys; $i++) {

    // First output to PKCS1 PEM format:
    print 'This is PKCS1 format:' . "\n";
    $pem->put_PublicKeyFormat('pkcs1');
    print $pem->toPem() . "\n";

    // Now PKCS8 PEM format:
    print 'This is PKCS8 format:' . "\n";
    $pem->put_PublicKeyFormat('pkcs8');
    print $pem->toPem() . "\n";

}


?>