json-crypto

Easy to use abstraction on top of Node's native crypto module to safely encrypt and decrypt JSON objects.

Installation

npm install json-crypto

Usage

const { createKey, createCodec } = require('json-crypto');
 
// Create a random encryption key
const key = createKey();
 
// Create our codec with { encrypt, decrypt }
const codec = createCodec(key);
 
// Encrypt a JSON object and return the ciphertext
const ciphertext = codec.encrypt({ message: 'my secret message' })
 
// Decrypt the ciphertext back into a JSON object
const secret = codec.decrypt(ciphertext)
// secret === { message: 'my secret message' }

NB: You'll probably want to persist the generated key and store it somewhere safe.

Benefits

• Safe by nature (only uses native crypto functions)
• Safer by forcing you to use unique nonces (see why it matters)
• Easy to use interface for JSON objects
• Ciphertexts are valid URL query argument strings (using encodeURIComponent)