botpress/lib/security/crypto/index.js

The world's first CMS for bots. Easily create, manage and extend chatbots.

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _crypto = require('crypto');

var _crypto2 = _interopRequireDefault(_crypto);

var _nanoid = require('nanoid');

var _nanoid2 = _interopRequireDefault(_nanoid);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

const RANDOM_SECRET_KEY_LENGTH = 32;
const IV_LENGTH = 16;

class Crypto {
  constructor({ botfile }) {
    this.algorithm = 'aes-256-cbc';
    this.secretKey = botfile.secretKey || (0, _nanoid2.default)(RANDOM_SECRET_KEY_LENGTH);
  }

  encrypt(text) {
    const iv = _crypto2.default.randomBytes(IV_LENGTH);
    const cipher = _crypto2.default.createCipheriv('aes-256-cbc', new Buffer(this.secretKey), iv);

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

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

  decrypt(text) {
    const textParts = text.split(':');
    const iv = new Buffer(textParts.shift(), 'hex');
    const encryptedText = new Buffer(textParts.join(':'), 'hex');
    const decipher = _crypto2.default.createDecipheriv('aes-256-cbc', new Buffer(this.secretKey), iv);

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

    return decrypted.toString();
  }
}
exports.default = Crypto;
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