1const crypto = require('crypto');
2
3const algorithm = 'aes-256-ctr';
4const secretKey = 'vOVH6sdmpNWjRRIqCc7rdxs01lwHzfr3';
5const iv = crypto.randomBytes(16);
6
7const encrypt = (text) => {
8
9    const cipher = crypto.createCipheriv(algorithm, secretKey, iv);
10
11    const encrypted = Buffer.concat([cipher.update(text), cipher.final()]);
12
13    return {
14        iv: iv.toString('hex'),
15        content: encrypted.toString('hex')
16    };
17};
18
19const decrypt = (hash) => {
20
21    const decipher = crypto.createDecipheriv(algorithm, secretKey, Buffer.from(hash.iv, 'hex'));
22
23    const decrpyted = Buffer.concat([decipher.update(Buffer.from(hash.content, 'hex')), decipher.final()]);
24
25    return decrpyted.toString();
26};
27
28module.exports = {
29    encrypt,
30    decrypt
31};

1const crypto = require('crypto');
2
3const secret = 'abcdefg';
4const hash = crypto.createHmac('sha256', secret)
5                   .update('I love cupcakes')
6                   .digest('hex');
7console.log(hash);
8// Prints:
9//   c0fa1bc00531bd78ef38c628449c5102aeabd49b5dc3a2a516ea6ea959d6658e
10