AES-ENCRYPTION-DESCRIPTION IN NODEJS

aes-encryption-decryption

const crypto = require('crypto');

const ENCRYPTION_KEY = ''//16/32 characters
const IV_KEY = '' //16 charactere

function getAlgorithm(key) {
    switch (key.length) {
        case 16:
            return 'aes-128-cbc';
        case 32:
            return 'aes-256-cbc';

    }
    throw new Error('Invalid key length: ' + key.length);
}

function encrypt(text) {
    const key = new Buffer.from(ENCRYPTION_KEY)
    const iv = new Buffer.from(IV_KEY)

    let cipher = crypto.createCipheriv(getAlgorithm(ENCRYPTION_KEY), key, iv);
    let encrypted = cipher.update(text);

    encrypted = Buffer.concat([encrypted, cipher.final()]);

    return iv.toString('hex') + ':' + encrypted.toString('hex');
}

function decrypt(text) {
    let textParts = text.split(':');
    let iv = Buffer.from(textParts.shift(), 'hex');
    let encryptedText = Buffer.from(textParts.join(':'), 'hex');
    let decipher = crypto.createDecipheriv(getAlgorithm(ENCRYPTION_KEY), new Buffer.from(ENCRYPTION_KEY), iv);
    let decrypted = decipher.update(encryptedText);

    decrypted = Buffer.concat([decrypted, decipher.final()]);

    return decrypted.toString();
}

console.log(encrypt('hello'))
console.log(decrypt(encrypt('hello')))
module.exports = {decrypt, encrypt};