secure-webstore

Secure-webstore

This is a secure, promise-based keyval store that encrypts data stored in IndexedDB.

The symmetric encryption key is derived from the provided passphrase, and then stored in an encrypted form within the provided store name. The encryption key is only used in memory and never revealed.

The IndexedDB wrapper used internally is idb-keyval, while the cryptographic operations are handled by easy-web-crypto.

Usage

Initialize

The init step takes care of key derivation and setting up the encryption/decryption key.

const Store = require('secure-webstore')

const store = new Store('some-store-name', 'super-secure-passphrase')

store.init().then(() => {
  // store is ready
})

set:

store.set('hello', 'world')

Since this is IDB-backed, you can store anything structured-clonable (numbers, arrays, objects, dates, blobs etc).

All methods return promises:

store.set('hello', 'world')
  .then(() => console.log('It worked!'))
  .catch(err => console.log('It failed!', err))

get:

// logs: "world"
const val = await store.get('hello')
// console.log(val) -> "world"

If there is no 'hello' key, then val will be undefined.

keys:

// logs: ["hello", "foo"]
keys().then(keys => console.log(keys))

del:

store.del('hello')

clear:

store.clear()

destroy:

Completely remove a database.

store.destroy()

updatePassphrase:

Update the passphrase that is used for key derivation. The encryption key used for data will not be affected, just the key that protects it.

store.updatePassphrase(oldPass, newPass)

That's it!

Installing

Via npm

npm install --save secure-webstore

Via <script>

• dist/secure-store.js can be directly used in browsers.