Encrypt / Decrypt files with Node.JS
Very simple example on how to encrypt and decrypt files using Node.JS and AES encryption algorithm.
Cryptography
GPG in Fedora 36 (Quickstart Guide)
This article describes the process of encrypting and decrypting files with GnuPG (GPG) using asymmetric cryptography (public key and private key).
This is specially useful when you want to make sure (ideally) that only the intended receiver can see the message, needless to say that you are able to sign
Generate SSH Keys in Linux (Fedora 35)
RSA
The simplest way is to execute the following command:
ssh-keygen -t rsa
This is how the whole process looks like in console. Please note that I did override the default key-pair location.
[terminator@fedora ~]$ ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save
Copy-Paste-Run-Ready string encryption / decryption with AES-256 in Node.JS
/* --- Code ready to copy -> paste -> run --- */
// Libraries
const crypto = require('crypto');
const ENCODING = "hex"; // hex or base64
// Implementations
function encryptAES256(clearMsg, key) {
let iv = crypto.randomBytes(16); // Generating 16 byte random IV
let cipher = crypto.createCipheriv(
"aes256",
crypto.createHash("sha256").update(key, "utf8").digest(), // 32 bytes
Shortest and simplest string encryption / decryption with AES-256 in Node.JS
Copy and paste the following code in a .js file, then run it.
// Libraries
const crypto = require('crypto');
// Constants
const OUTPUT_FORMAT = "hex";
const ALGORITHM = "aes256";
const KEY = "012345ABCDEFGHIJKLMNOPQRSTUVWXYZ";
const IV = "ABCDEF0123456789";
// Implementations
function encrypt(message) {
let cipher = crypto.createCipheriv(
ALGORITHM,
Buffer.from(KEY),
Buffer.from(IV)
);
return (Buffer.concat(
SCRYPT demo in Node.JS v15
SCRYPT is yet another password-based key derivation function that allows you to tweak its arguments in order to discourage brute-force attacks. Basically you can adjust the options to make it slower, and therefore brute-force attacks will need more time to be performed.
Here is an example of how to use
Password Based Key Derivation Function 2 (PBKDF2) demo in Node.JS v15
A quick demo on how to use Password Based Key Derivation Function 2 (PBKDF2) to generate keys and IVs to use with all different ciphers available in Node.JS v15.x.
const crypto = require('crypto');
const PASSWORD = "My_Secret_Password"; // Could be the password/key used to encrypt a message