How to create a .pem and .cert files for node js project

Question

I want to run an https server. I found this code online :

 var fs = require('fs'),
    http = require('http'),
    https = require('https'),
    express = require('express');

var port = 8000;

var options = {
    key: fs.readFileSync('./ssl/privatekey.pem'),
    cert: fs.readFileSync('./ssl/certificate.pem'),
};

var app = express();

var server = https.createServer(options, app).listen(port, function(){
  console.log("Express server listening on port " + port);
});

app.get('/', function (req, res) {
    res.writeHead(200);
    res.end("hello world\n");
});

the problem is that i do not know how to create those files. is there a way of generating them using the node shell? (working on Windows)

where should i write this command: openssl req -newkey rsa:2048 -new -nodes -keyout key.pem -out csr.pem ? — itay312, Jun 07 '16 at 22:06

score 4 · Accepted Answer · edited Aug 22 '22 at 00:23

4

Take a look at this: How to create .pem files for https web server

openssl req -newkey rsa:2048 -new -nodes -x509 -days 3650 -keyout key.pem -out cert.pem

If you have openSSL installed you should be able to type this command directly into the command prompt on windows or terminal on mac.

edited Aug 22 '22 at 00:23

qwerty

2,065
2
28
39

answered Jun 07 '16 at 22:28

Jack Proudfoot

56
4

score 1 · Answer 2 · answered Nov 18 '21 at 08:04

import crypto from 'crypto'
import { writeFileSync } from 'fs';

const certKey = crypto.randomBytes(1024).toString('hex')
const certKeyFormatted = certKey.match(/.{1,64}/g).join("\n")
const certContents =
    '-----BEGIN CERTIFICATE-----' + "\n" +
    certKeyFormatted + "\n" +
    '-----END CERTIFICATE-----'

console.log('generated certificate')
console.log()
console.log(certContents)

const filePath = 'signingKey.pem'

writeFileSync(
    filePath,
    certContents,
    { encoding: 'utf8' }
);

console.log()
console.log('certificate saved to', filePath)

this gives something like

How to create a .pem and .cert files for node js project

2 Answers2