Node Basics
Encryption
NodeJS uses the crypto module to handle the encyrption and decryption of data using various algorithms.
Encrypt / Decrypt Module
These are simple functions that will encrypt and decrypt provided text using the aes-256-cbc algorithm, and the key and iv as "salt".
Encrypt.js:
// Nodejs encryption with CTR
const crypto = require("crypto");
const algorithm = "aes-256-cbc";
// const key = process.env.APP_KEY;
const key = crypto.randomBytes(32);
const iv = crypto.randomBytes(16);
function encrypt(text) {
let cipher = crypto.createCipheriv(algorithm, Buffer.from(key), iv);
let encrypted = cipher.update(text);
encrypted = Buffer.concat([encrypted, cipher.final()]);
return { iv: iv.toString("hex"), encryptedData: encrypted.toString("hex") };
}
function decrypt(text) {
let iv = Buffer.from(text.iv, "hex");
let encryptedText = Buffer.from(text.encryptedData, "hex");
let decipher = crypto.createDecipheriv(algorithm, Buffer.from(key), iv);
let decrypted = decipher.update(encryptedText);
decrypted = Buffer.concat([decrypted, decipher.final()]);
return decrypted.toString();
}
module.exports = {
encrypt,
decrypt
};
var hw = encrypt("Private information");
console.log(hw);
console.log(decrypt(hw));