(Node.js) 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.

Install Chilkat for Node.js and Electron using npm at Chilkat npm packages for Node.js Chilkat npm packages for Electron on Windows, Linux, MacOSX, and ARM

var os = require('os');
if (os.platform() == 'win32') {  
    if (os.arch() == 'ia32') {
        var chilkat = require('@chilkat/ck-node21-win-ia32');
    } else {
        var chilkat = require('@chilkat/ck-node21-win64'); 
    }
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node21-arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('@chilkat/ck-node21-linux32');
    } else {
        var chilkat = require('@chilkat/ck-node21-linux64');
    }
} else if (os.platform() == 'darwin') {
    if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node21-mac-m1');
    } else {
        var chilkat = require('@chilkat/ck-node21-macosx');
    }
}

function chilkatExample() {

    // 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..)
    var rsa = new chilkat.Rsa();

    // Generate a random 2048-bit RSA key.
    var success = rsa.GenerateKey(2048);
    if (success !== true) {
        console.log(rsa.LastErrorText);
        return;
    }

    // Get the private key
    // privKey: PrivateKey
    var privKey = rsa.ExportPrivateKeyObj();

    // Create the CSR object and set properties.
    var csr = new 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.
    var pemStr = csr.GenCsrPem(privKey);
    if (csr.LastMethodSuccess !== true) {
        console.log(csr.LastErrorText);

        return;
    }

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

    var fac = new chilkat.FileAccess();
    fac.WriteEntireTextFile("qa_output/csr1.pem",pemStr,"utf-8",false);

    // Show the CSR.
    console.log(pemStr);

    // 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-----

}

chilkatExample();