Dgcrypt

Dgcrypt is a simple Node.js library for encryption and decryption using various encryption methods, including AES-256-CBC, AES-256-GCM, and ChaCha20-Poly1305. It is designed to securely encrypt data on the backend, which can then be easily decrypted on the client side, such as on Android, iOS, and other platforms. This ensures that the data remains secure during transmission and cannot be easily cracked in between.

Platform Compatibility

The Dgcrypt library is designed to work seamlessly across multiple platforms. You can find corresponding libraries for the following platforms:

Android: Dgcrypt-Android
PHP: Dgcrypt-PHP

These libraries allow you to easily decrypt data that was encrypted on the backend using this PHP library, ensuring secure communication between your backend and client applications.

Supported Encryption Methods

Dgcrypt supports the following encryption methods:

AES-256-CBC: Standard encryption method providing confidentiality.
AES-256-GCM: Provides both encryption and authentication.
ChaCha20-Poly1305: Modern encryption method known for its performance and security.

Installation

You can install the package via npm, available for Node.js v16 and above:

npm install @davodm/dgcrypt-node

Usage

Encrypting Data:

const Dgcrypt = require('@davodm/dgcrypt-node');

const dgcrypt = new Dgcrypt('aes-256-cbc'); // Specify the encryption method
const secretKey = 'your-secret-key';
const data = 'Hello, World!';

const encryptedData = dgcrypt.encrypt(data, secretKey);
console.log('Encrypted Data:', encryptedData);

Decrypting Data:

const Dgcrypt = require('@davodm/dgcrypt-node');

const dgcrypt = new Dgcrypt('aes-256-cbc'); // Specify the encryption method
const secretKey = 'your-secret-key';
const encryptedData = 'your-encrypted-data';

const decryptedData = dgcrypt.setCipherMethod('aes-256-cbc').decrypt(encryptedData, secretKey);
console.log('Decrypted Data:', decryptedData);

Generating a Secure Key

const Dgcrypt = require('@davodm/dgcrypt-node');

const dgcrypt = new Dgcrypt();
const generatedKey = dgcrypt.generateKey();
console.log('Generated Key:', generatedKey); // Display the key in hexadecimal format

Testing

To run the tests, use Jest:

npm test

License

This project is licensed under the MIT License - see the LICENSE file for details.

Author

Davod Mozafari - Twitter