Encrypting and decrypting data in Node.js can be achieved using various cryptographic libraries. One popular library is the crypto module, which comes with Node.js. Below is a basic example demonstrating how to encrypt and decrypt data using the Advanced Encryption Standard (AES) algorithm with the crypto module:
const crypto = require('crypto');
// Replace these keys with your own secret keys
const secretKey = 'mySecretKey123456';
const iv = 'myInitializationVector';
// Function to encrypt data
function encrypt(text) {
const cipher = crypto.createCipheriv('aes-256-cbc', Buffer.from(secretKey), Buffer.from(iv, 'hex'));
let encrypted = cipher.update(text, 'utf-8', 'hex');
encrypted += cipher.final('hex');
return encrypted;
}
// Function to decrypt data
function decrypt(encryptedText) {
const decipher = crypto.createDecipheriv('aes-256-cbc', Buffer.from(secretKey), Buffer.from(iv, 'hex'));
let decrypted = decipher.update(encryptedText, 'hex', 'utf-8');
decrypted += decipher.final('utf-8');
return decrypted;
}
// Example usage
const originalText = 'Hello, this is a secret message!';
const encryptedText = encrypt(originalText);
const decryptedText = decrypt(encryptedText);
console.log('Original Text:', originalText);
console.log('Encrypted Text:', encryptedText);
console.log('Decrypted Text:', decryptedText);
In this example:
-
crypto.createCipherivis used to create a cipher with the AES-256-CBC algorithm. It takes the secret key and initialization vector (IV) as parameters. -
cipher.updateis called with the input text and encoding ('utf-8'), and thencipher.finalis called to obtain the final encrypted text. -
crypto.createDecipherivis used to create a decipher with the same algorithm, secret key, and IV. -
decipher.updateanddecipher.finalare used to obtain the decrypted text.
Remember to replace the secretKey and iv values with your own secure keys. Additionally, handle these keys securely, possibly using environment variables or a secure key management system. Also, note that security best practices may change over time, so it's important to stay updated on the latest recommendations.
