Certificate Installation : Node.js on Linux

May 25, 2018 in WebServer

Before configuring the SSL with node.js, please ensure that you have your 'Private Key', 'Certificate' and 'Intermediate(s)' certificates. You might have received the following certificates from Sectigo.

1) your_domain_name.crt (or) OrderNumber.crt - It is your Server Certificate

2) Intermediate Certificates, it depends upon the type of Certificate you purchase. Mostly, you will get them in the following format.

Ex: 'SectigoRSAXXXXXXXXXSecureServerCA.crt' and 'USERTrustRSAAddTrustCA.crt'

Note: You may have received a .ca-bundle file, which includes those Intermediate Certificates. In this case, please download the appropriate certificate from Downloads.

1. Create an https_server.js file using the following values. you can create file with any name using .js extension.

# vim https_server.js

var https = require('https'); var fs = require('fs');
var https_options =
key: fs.readFileSync('/path/to/private.key'),
cert: fs.readFileSync('/path/to/your_domain_name.crt'),
ca: [

https.createServer(options, function (req, res) {
 res.end('Welcome to Node.js HTTPS Servern');

2. Now use the following command to start node.js application created in above step.

# node https_server.js

3. To verify the installation, you can use Qualys SSL Server Test.