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@vlucas
vlucas / encryption.ts
Last active June 3, 2025 10:38
Stronger Encryption and Decryption in Node.js
import { createCipheriv, createDecipheriv, randomBytes } from "crypto";
const ENCRYPTION_KEY: string = process.env.ENCRYPTION_KEY || ""; // Must be 256 bits (32 characters)
const IV_LENGTH: number = 16; // For AES, this is always 16
/**
* Will generate valid encryption keys for use
* Not used in the code below, but generate one and store it in ENV for your own purposes
*/
export function keyGen() {
@markthiessen
markthiessen / getWeeksInMonth.js
Last active February 19, 2025 12:10
JavaScript - get weeks in a month as array of start and end days
//note: month is 0 based, just like Dates in js
function getWeeksInMonth(year, month) {
const weeks = [],
firstDate = new Date(year, month, 1),
lastDate = new Date(year, month + 1, 0),
numDays = lastDate.getDate();
let dayOfWeekCounter = firstDate.getDay();
for (let date = 1; date <= numDays; date++) {