How to Encrypt / Decrypt strings with RSA in Node.JS

21 Nov

Interesting things that go through my mind during lock-down haha! const crypto = require(‘crypto’); const PASSPHRASE = ‘I had learned that some things are best kept secret.’; const KEY_PAIR_OPTIONS = { modulusLength: 2048, publicKeyEncoding: { type: ‘spki’, format: ‘pem’ }, privateKeyEncoding: { type: ‘pkcs8’, format: ‘pem’, cipher: ‘aes-256-cbc’, passphrase: PASSPHRASE } }; const KEY_PAIR = crypto.generateKeyPairSync(‘rsa’, KEY_PAIR_OPTIONS); const RSA_PRK = …

How to deploy Express.JS web application on HawkHost with cPanel?

08 Nov

Here is a step by step guide based on my experience on how to deploy your Express.JS web application with cPanel on HawkHost servers. First, the versions I am using are: cPanel v90.0.16 Express.JS v4.16.0 Node.JS v12.16.1 NPM v6.14.4 Now it’s time to login to your cPanel, and do the following Upload your application folder to the server: You can …

How to generate X.509v3 self-signed certificate in PEM format with Node.JS

01 Nov

I thought this would be way harder, but thanks to the node-forge library and their perfect documentation, this was a breeze! After some experimentation I have modified their example code to have the very basic way to generate a X.509v3 self-signed certificate in PEM format. // import libraries const forge = require(‘node-forge’); const crypto = require(‘crypto’); const fs = require(‘fs’); …

How to pack NodeJS project into a tarball?

26 Apr

Today I needed to install my brand new NodeJS-developed CLI application in my computer. Important! Don’t forget to add this to your package.json file:  “bin”: {    “skynet”: “./bin/skynetApp.js”   }, It’s basically the name of the command and the NodeJS file it will execute, in this case the command name is skynet and every time this is typed in a terminal window it …

How to hash files in Node.JS

11 Apr

The process is quite simple actually. Unfortunately ,as much things in Node.js, it works asynchronously, for some applications this will be perfect, but for some others it will be a mess to wait for the freaking hash to do something else, anyway I am not going to discuss that here I actually like Node.js. Please note that in the following …

How to generate RSA key pair in Node.JS?

11 Apr

Very straight forward process. Not complicated at all, I would say that the most difficult part would be to actually tweak the options, however the code below actually works and provides you the time it took to generate the key pair as well, just for informational purposes. Run the following code in Node.js. const crypto = require(‘crypto’); const RSA = …

How to Encrypt / Decrypt with AES (CCM & GCM) in Node.JS

04 Apr

First of all we have to understand what is CCM mode and GCM mode. Roughly: CCM CCM mode (Counter with CBC-MAC) is a mode of operation for cryptographic block ciphers. It is an authenticated encryption algorithm designed to provide both authentication and confidentiality. CCM mode is only defined for block ciphers with a block length of 128 bits. GCM Galois/Counter …

Base64 URL Safe Encoding / Decoding (RFC-7515)

25 May

A few days back I was required to encode some string in base 64 URL safe. After some research I found that there are several variants of base 64. The one implemented in the code below corresponds to RFC-7515. Here is the code: function encodeBase64Url(str) { let s = new Buffer(str).toString(‘base64’); // Regular base64 encoder s = s.replace(‘=’, ”); // …

How to generate random bytes in Node.JS

09 Feb

Easy! I discovered this recently and it is interesting to me. Here is a quick example: const crypto = require(‘crypto’); console.log(crypto.randomBytes(1).toString(“hex”)); console.log(crypto.randomBytes(2).toString(“hex”)); console.log(crypto.randomBytes(4).toString(“hex”)); console.log(crypto.randomBytes(8).toString(“hex”)); console.log(crypto.randomBytes(16).toString(“hex”)); console.log(crypto.randomBytes(32).toString(“hex”)); console.log(crypto.randomBytes(64).toString(“hex”)); When you run this code you might see something similar to this: E:\NodeJS>node randomCrypto.js d8 dccd 0709fee2 67d6d7c51cc59f0d af19069e601e47a9141d27d7d828a9d0 f83b7547452099462061734791da57443cc60828de7dcb8f7494eedceb3c889c e2e4a1faaf4190898aaf4fa786e20fe076237854ae4628127cb2eda4bafd3000b42788e347ade94d0c98614a40586b71ded3044879f791adedd6c0d4bb22e9ac The argument passed to the function is the length in bytes, when …

How to activate ES6 in Visual Studio Code

29 Dec

I’ve been looking for this answer for several weeks. Here is how to do it. Go to File > Preferences > Settings (or press Ctrl + ,) Add the following code in the USER SETTINGS tab “jshint.options”: { “esversion”: 6 } I have JSHint installed, if you don’t, you can install it from Visual Studio Code directly. Sources https://stackoverflow.com/questions/29953293/is-there-a-way-to-turn-on-es6-es7-syntax-support-in-vscode