(Node.js) Use HTTPS Client Certificate from .cer and .key Files

Demonstrates how to load a cert + private key from .cer and .key (base64) files and use it for mutual TLS authentication (client-side certificate).

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() {

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

    var http = new chilkat.Http();

    var cert = new chilkat.Cert();
    var privKey = new chilkat.PrivateKey();

    // Load any type of certificate (.cer, .p7b, .pem, etc.) by calling LoadFromFile.
    var success = cert.LoadFromFile("qa_data/certs/sample_cert_a.cer");
    if (success !== true) {
        console.log(cert.LastErrorText);
        return;
    }

    // Load the private key.
    var bd = new chilkat.BinData();
    success = bd.LoadFile("qa_data/certs/sample_key_a.key");
    success = privKey.LoadAnyFormat(bd,"privateKeyPasswordIfNecessary");
    if (success !== true) {
        console.log(privKey.LastErrorText);
        return;
    }

    // Associate the private key with the cert.
    success = cert.SetPrivateKey(privKey);
    if (success !== true) {
        console.log(cert.LastErrorText);
        return;
    }

    // Set the certificate to be used for mutual TLS authentication
    // (i.e. sets the client-side certificate for two-way TLS authentication)
    success = http.SetSslClientCert(cert);
    if (success !== true) {
        console.log(http.LastErrorText);
        return;
    }

    // At this point, the HTTP object instance is setup with the client-side cert, and any SSL/TLS
    // connection will automatically use it if the server demands a client-side cert.

}

chilkatExample();