PHP

Generate CSR from Pre-Existing Private Key

See more CSR Examples

Demonstrates how to generate a Certificate Signing Request (CSR) from a pre-existing RSA private key.

Note: This example requires Chilkat v9.5.0.65 or greater.

Chilkat2 PHP

<?php

use Chilkat2\Csr;
use Chilkat2\FileAccess;
use Chilkat2\PrivateKey;

// Note: Requires Chilkat v9.5.0.65 or greater.

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

$privKey = new PrivateKey();

// Load the private key from a file.
// (Chilkat provides the ability to load private keys from many different
// formats and sources..)
try {
    $privKey->LoadEncryptedPemFile('qa_data/rsa/privKey1.pem', 'password');

    // Create the CSR object and set properties.
    $csr = new Csr();

    // Specify the Common Name.  This is the only required property.
    // For SSL/TLS certificates, this would be the domain name.
    // For email certificates this would be the email address.
    $csr->CommonName = 'mysubdomain.mydomain.com';

    // Country Name (2 letter code)
    $csr->Country = 'GB';

    // State or Province Name (full name)
    $csr->State = 'Yorks';

    // Locality Name (eg, city)
    $csr->Locality = 'York';

    // Organization Name (eg, company)
    $csr->Company = 'Internet Widgits Pty Ltd';

    // Organizational Unit Name (eg, secion/division)
    $csr->CompanyDivision = 'IT';

    // Email address
    $csr->EmailAddress = 'support@mydomain.com';

    // Create the CSR using the private key.
    $pemStr = $csr->GenCsrPem($privKey);
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

// Save the CSR..
$fac = new FileAccess();
$fac->WriteEntireTextFile('qa_output/csr1.pem', $pemStr, 'utf-8', false);

// Show the CSR.
echo $pemStr, "\n";

// Sample output:
// The CSR PEM can be checked here:
// https://www.networking4all.com/en/support/tools/csr+check/
// Copy-and-paste the PEM into the online CSR Decoding / CSR Verification form

//     -----BEGIN CERTIFICATE REQUEST-----
//     MIIC6jCCAdICAQAwgaQxITAfBgNVBAMMGG15c3ViZG9tYWluLm15ZG9tYWluLmNv
//     bTELMAkGA1UEBhMCR0IxDjAMBgNVBAgMBVlvcmtzMQ0wCwYDVQQHDARZb3JrMSEw
//     HwYDVQQKDBhJbnRlcm5ldCBXaWRnaXRzIFB0eSBMdGQxCzAJBgNVBAsMAklUMSMw
//     IQYJKoZIhvcNAQkBFhRzdXBwb3J0QG15ZG9tYWluLmNvbTCCASIwDQYJKoZIhvcN
//     AQEBBQADggEPADCCAQoCggEBALnQ0un/wF8whk+gPuiAlf3qvx14jgAOV6Erm6EB
//     H7WACPCpnKcm/8KP+7uoPiwRQaENhMeCgf45vcivl2p6aAn/spLXyEkXyw2d8wFb
//     YYAGRkiz4Xf7ASJiKuwcOtORz+sSDzgtdfokHfXU1cYeFE2yQhSdLUY5fMn425+g
//     KoEEsRSjSDe6AKru4+4iGNrLKd8pB9IA5/jOE139IkWlB9r5fEPD5bUTsgqXk9eb
//     68O0gc712V2eZK07N24lDmFC4bIMTD4csDWocR5hFHXj7NX7c8sOBDcpEb9mPIk4
//     elxubnhkfnjhOi4J3lDHcT/0ALnbLhf9LnaiKqs+5VcVZvECAwEAAaAAMA0GCSqG
//     SIb3DQEBBQUAA4IBAQC0AETLIcP3foh5nbu2hVFS8uCUNZ5hEIR1eXmYZmZoBQq2
//     26ZAoT4CZwixlggC+n7WvAXJ5Pzxpl4wLV4loTiQzaKPX1w0ERo5ZRwLy0n56oG2
//     6QG+WTViT1C8rlgtVwkCFNOXr0kSSRs8FdaPllqKxK1hxYSL7zwNpumsk39F2cDt
//     vhcekvH0V3BuGrQFm3dKN/0azW6GOod9+Vq4VzSyOe3kp15oxLBsZOFOu/REujcw
//     Tzu2jt1asQKUm60CZ9wNHpYepR0Ww40uP1slbehEaFDa6V8b60/tlHHmBbJ4/fy5
//     hJnYCvjzFz4O9VtT+JtP9ldRHWV3KpZ8ne3AjD+F
//     -----END CERTIFICATE REQUEST-----