Tech Rescue

Node.JS

Encrypt / Decrypt strings with RSA in Node.JS

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

Random Password Generator in Node.JS

The other day I thought about how to generate passwords from random arrays. Here is what I came up with: /* * RaNdom Password Generator */ const crypto = require('crypto'); const PASSWORD_LENGTH = 18; const LOWERCASE_ALPHABET = 'abcdefghijklmnopqrstuvwxyz'; // 26 chars const UPPERCASE_ALPHABET = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'; // 26 chars const NUMBERS = '0123456789'; // 10 chars const SYMBOLS

How to parse JSON files in Node.JS?

Quick tip using fs: let data = fs.readFileSync("myFile.json", 'utf8'); console.log(typeof JSON.parse(data)); There is another way to do this that requires less effort. Using require directly, like so: const data = require("myFile.json"); console.log(typeof data); Or you can create a function like this

How to pack Node.JS project into a tarball?

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

How to generate RSA key pair in Node.JS?

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

How to hash files in Node.JS

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

How to create a Node.JS application with Express Generator

I am assuming that you already have Node.JS installed. If you don’t, worry not! you can get your own copy today from the Node.JS download section! Using ExpressJS is very quick and easy. It generates all the file structure needed for a web application. You can select