Check certificate validity

ssl-validator.js

const tls = require('tls');
const https = require('https');
const crypto = require('crypto');

function sha256(s) {
  return crypto.createHash('sha256').update(s).digest('base64');
}
const options = {
  hostname: 'qaenterprise.botlers.io',
  port: 443,
  path: '/',
  method: 'GET',
  checkServerIdentity: function(host, cert) {
    // Make sure the certificate is issued to the host we are connected to
    const err = tls.checkServerIdentity(host, cert);
    if (err) {
      return err;
    }
  },
};

options.agent = new https.Agent(options);
const req = https.request(options, (res) => {
  console.log('All OK. Server matched our pinned cert or public key');
  // statusCode must be 200
  console.log('statusCode:', res.statusCode);

  // VALID CERTIFICATE
});

req.on('error', (e) => {
  // INVALID CERTIFICATE
  console.error('ERROR:', e.message);
});

req.end();