city-bip38

A JavaScript component that adheres to the BIP38 standard to secure your crypto currency private keys. Fully compliant with Node.js and the browser (via Browserify).

city-bip38 is a fork of the original bip38, with added support for alternative networks (bip38 only supports bitcoin main network) and relies on an async library for scrypt, making it more performant.

Performance:

Intel Core i7-8700K

• bip38: ~8700ms
• bip38-network: ~430ms

Why?

BIP38 is a standard process to encrypt Bitcoin and crypto currency private keys that is imprevious to brute force attacks thus protecting the user.

Package Info

• homepage: http://cryptocoinjs.com/modules/currency/bip38/
• github: https://github.com/cryptocoinjs/bip38
• tests: https://github.com/cryptocoinjs/bip38/tree/master/test
• issues: https://github.com/cryptocoinjs/bip38/issues
• license: MIT
• versioning: http://semver-ftw.org

Usage

Installation

npm install city-bip38

API

encrypt(buffer, compressed, passphrase[, progressCallback, scryptParams])

var bip38 = require('city-bip38')
var wif = require('wif')

var myWifString = '5KN7MzqK5wt2TP1fQCYyHBtDrXdJuXbUzm4A9rKAteGu3Qi5CVR'
var decoded = wif.decode(myWifString)

bip38.encryptAsync(decoded.privateKey, decoded.compressed, 'TestingOneTwoThree', (encryptedKey) => {
console.log(encryptedKey)
})

// => '6PRVWUbkzzsbcVac2qwfssoUJAN1Xhrg6bNk8J7Nzm5H7kxEbn2Nh2ZoGg'

decrypt(encryptedKey, passphrase[, progressCallback, scryptParams])

var bip38 = require('city-bip38')
var wif = require('wif')

var encryptedKey = '6PRVWUbkzzsbcVac2qwfssoUJAN1Xhrg6bNk8J7Nzm5H7kxEbn2Nh2ZoGg'
bip38.decryptAsync(encryptedKey, 'TestingOneTwoThree', function (decryptedKey) {
  console.log(decryptedKey)
})

console.log(wif.encode(0x80, decryptedKey.privateKey, decryptedKey.compressed))
// => '5KN7MzqK5wt2TP1fQCYyHBtDrXdJuXbUzm4A9rKAteGu3Qi5CVR'

References

• https://github.com/bitcoin/bips/blob/master/bip-0038.mediawiki
• pointbiz/bitaddress.org#56 (Safari 6.05 issue)
• https://github.com/casascius/Bitcoin-Address-Utility/tree/master/Model
• https://github.com/nomorecoin/python-bip38-testing/blob/master/bip38.py
• https://github.com/pointbiz/bitaddress.org/blob/master/src/ninja.key.js