(PHP ActiveX) Generate a CSR with SAN (Subject Alternative Name) Extension

Demonstrates how to generate a private key and a Certificate Signing Request (CSR) that includes the SAN extension.

Note: This example requires Chilkat v9.5.0.84 or greater.

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

// Note: Requires Chilkat v9.5.0.84 or greater.

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

// First generate an RSA private key.
// (It is also possible to create CSRs based on ECDSA private keys..)
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Rsa')
$rsa = new COM("Chilkat.Rsa");

// Generate a random 2048-bit RSA key.
$success = $rsa->GenerateKey(2048);
if ($success != 1) {
    print $rsa->LastErrorText . "\n";
    exit;
}

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

// Create the CSR object and set properties.
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Csr')
$csr = new COM("Chilkat.Csr");

// Specify the Common Name. 
$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';

// Add Subject Alternative Names
// (The AddSan method is added in Chilkat v9.5.0.84)
// Call AddSan for each alternative name.
$success = $csr->AddSan('dnsName','mydomain.com');
$success = $csr->AddSan('dnsName','mysubdomain.mydomain.com');
$success = $csr->AddSan('ipAddress','192.168.0.123');

// Create the CSR using the private key.
$pemStr = $csr->genCsrPem($privKey);
if ($csr->LastMethodSuccess != 1) {
    print $csr->LastErrorText . "\n";

    exit;
}

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

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.FileAccess')
$fac = new COM("Chilkat.FileAccess");
$fac->WriteEntireTextFile('qa_output/csr1.pem',$pemStr,'utf-8',0);

// Show the CSR.
print $pemStr . "\n";

// Sample output:

// 	-----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-----

?>