NodeJS Compress / Encrypt / Base64

encrypt.mjs

import * as crypto from 'crypto';
import * as zlib from 'zlib';
const assert = require('assert');

const encrypt = (val, password='p@55w07d') => {
  const key = password.repeat(16).substring(0, 32);
  const iv = key.substring(0, 16).split('').reverse().join('');
  let cipher = crypto.createCipheriv('aes-256-cbc', key, iv);
  let encrypted = cipher.update(val, 'utf8', 'base64');
  return (encrypted + cipher.final('base64')).replace(/[=]+/,'');
};

const decrypt = (encrypted, password='p@55w07d') => {
  const key = password.repeat(16).substring(0, 32);
  const iv = key.substring(0, 16).split('').reverse().join('');
  let decipher = crypto.createDecipheriv('aes-256-cbc', key, iv);
  let decrypted = decipher.update(encrypted, 'base64', 'utf8');
  return (decrypted + decipher.final('utf8'));
};

const fromBase64 = (base64) => {
  return Buffer.from(base64, 'base64').toString('ascii'); 
};

const toBase64 = (string) => {
  return Buffer.from(string).toString('base64').replace(/[=]+/,'');; 
};

const compress = (string) => {
  return zlib.brotliCompressSync(string).toString('base64').replace(/[=]+/,'');;
}

const decompress = (base64) => {
  return zlib.brotliDecompressSync(Buffer.from(base64, 'base64')).toString();
}

var token = 'eyJ0eXAiOiJKV1QiLCJraWQiOiI0aUNLRkIwUlhJeHl0b3IxcjNUb0JkUmlldnM9IiwiYWxnIjoiUlMyNTYifQ';
var encrypted = encrypt(token)
var compressed = compress(encrypted)
var decompressed = decompress(compressed)
var decrypted = decrypt(decompressed);
assert.equal(token, decrypted);

assert(encrypt('Hello World') === 'FTGJzypffFrKHr6+UKlY7g');
assert(decrypt('FTGJzypffFrKHr6+UKlY7g') === 'Hello World');
assert(toBase64('Hello World') === 'SGVsbG8gV29ybGQ');
assert(fromBase64('SGVsbG8gV29ybGQ') === 'Hello World');
assert(compress('Hello World') === 'CwWASGVsbG8gV29ybGQD');
assert(decompress('CwWASGVsbG8gV29ybGQD') === 'Hello World');

export { compress, decompress, fromBase64, toBase64, encrypt, decrypt};