Key-store NPM | npm.io

key-store

Isomorphic encrypted key store. Works in node and in the browser.

Features

🔒 Strong encryption to securily store sensible data 🔑 Supports distinct passwords for each key 🔍 Can store unencrypted data alongside each key

Attention: The data is stored in a truly secure way. If you lose your password you will not be able to recover the wallet data! So please make sure to store a backup of the private data in a safe place.

Installation

$ npm install --save key-store

Using yarn:

$ yarn add key-store

Example

import { createStore } from 'key-store'

const store = createStore(saveFile, initialData)

await store.saveKey('test-key', 'arbitrary password', { privateKey: 'super secret private key' })

const { privateKey } = store.getPrivateKeyData('test-key', 'arbitrary password')

console.log(`Stored private key: ${privateKey}`)
console.log(`All stored keys' IDs: ${store.getKeyIDs().join(', ')}`)

Writing and reading keys to a file in node is easy:

import * as fs from 'fs'
import * as util from 'util'
import { createStore } from 'key-store'

const readFile = util.promisify(fs.readFile)
const writeFile = util.promisify(fs.writeFile)

async function createFileStore (filePath) {
  const saveKeys = data => writeFile(filePath, JSON.stringify(data), 'utf8')
  const readKeys = async () => JSON.parse(await readFile(filePath, 'utf8'))

  return createStore(saveKeys, await readKeys())
}

Encryption details

All data private data is encrypted using tweetnacl's xsalsa20-poly1305 implementation. The encryption key is derived from the password using PBKDF2/SHA256. The iteration count for the PBKDF2 invocation is configurable and defaults to 10,000 rounds.