(PHP Extension) Generate CSR with Uncommon Fields

See more CSR Examples

Demonstrates how to generate a new RSA key and a Certificate Signing Request (CSR) for this:

csr.common.name=Admin forInformation-MainShop
csr.serial.number=1-XYZ|2-2.0|3-999695
csr.organization.identifier=990099994100099
csr.organization.unit.name=9999910000
csr.organization.name=9999910000
csr.country.name=SA
csr.invoice.type=1100
csr.location.address=King Fahed Road
csr.industry.business.category=MainOffice

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");

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

// First generate an RSA private key.
$rsa = new CkRsa();

// Generate a random 2048-bit RSA key.
$success = $rsa->GenerateKey(2048);
if ($success != true) {
    print $rsa->lastErrorText() . "\n";
    exit;
}

// Get the private key
// privKey is a CkPrivateKey
$privKey = $rsa->ExportPrivateKeyObj();

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

$csr->put_CommonName('Admin forInformation-MainShop');

// Country Name (2 letter code)
$csr->put_Country('SA');

// Organization Name (eg, company)
$csr->put_Company('9999910000');

// Organizational Unit Name (eg, secion/division)
$csr->put_CompanyDivision('9999910000');

// See https://www.alvestrand.no/objectid/2.5.4.html for OIDs for the following fields:

// csr.serial.number=1-XYZ|2-2.0|3-999695
// 2.5.4.5 - id-at-serialNumber 
$csr->SetSubjectField('2.5.4.5','1-XYZ|2-2.0|3-999695','UTF8String');

// csr.organization.identifier=990099994100099
// 2.5.4.45 - id-at-uniqueIdentifier   Don't know if this is correct.
$csr->SetSubjectField('2.5.4.45','1100','UTF8String');

// csr.invoice.type=1100
// Don't know what this OID would be...
$csr->SetSubjectField('2.5.4.99','1100','UTF8String');

// csr.location.address=King Fahed Road
// 2.5.4.9 - id-at-streetAddress 
$csr->SetSubjectField('2.5.4.9','King Fahed Road','UTF8String');

// csr.industry.business.category=MainOffice
// 2.5.4.15 - id-at-businessCategory 
$csr->SetSubjectField('2.5.4.15','MainOffice','UTF8String');

// Create the CSR using the private key.
$pemStr = $csr->genCsrPem($privKey);
if ($csr->get_LastMethodSuccess() != true) {
    print $csr->lastErrorText() . "\n";

    exit;
}

// Save the private key and CSR to a files.
$privKey->SavePkcs8EncryptedPemFile('password','qa_output/privKey1.pem');

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

// Show the CSR.
print $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
// ...
// ...
// 	hJnYCvjzFz4O9VtT+JtP9ldRHWV3KpZ8ne3AjD+F
// 	-----END CERTIFICATE REQUEST-----

?>