react-native-crypto/index.js

implementation of crypto for React Native

'use strict'

import { randomBytes } from 'react-native-randombytes'
exports.randomBytes = exports.rng = exports.pseudoRandomBytes = exports.prng = randomBytes

// implement window.getRandomValues(), for packages that rely on it
if (typeof window === 'object') {
  if (!window.crypto) window.crypto = {}
  if (!window.crypto.getRandomValues) {
    window.crypto.getRandomValues = function getRandomValues (arr) {
      let orig = arr
      if (arr.byteLength != arr.length) {
        // Get access to the underlying raw bytes
        arr = new Uint8Array(arr.buffer)
      }
      const bytes = randomBytes(arr.length)
      for (var i = 0; i < bytes.length; i++) {
        arr[i] = bytes[i]
      }

      return orig
    }
  }
}

exports.createHash = exports.Hash = require('create-hash')
exports.createHmac = exports.Hmac = require('create-hmac')

var hashes = ['sha1', 'sha224', 'sha256', 'sha384', 'sha512', 'md5', 'rmd160'].concat(Object.keys(require('browserify-sign/algos')))
exports.getHashes = function () {
  return hashes
}

var p = require('pbkdf2')
exports.pbkdf2 = p.pbkdf2
exports.pbkdf2Sync = p.pbkdf2Sync

var aes = require('browserify-cipher')
;[
  'Cipher',
  'createCipher',
  'Cipheriv',
  'createCipheriv',
  'Decipher',
  'createDecipher',
  'Decipheriv',
  'createDecipheriv',
  'getCiphers',
  'listCiphers'
].forEach(function (key) {
  exports[key] = aes[key]
})

var dh = require('diffie-hellman')
;[
  'DiffieHellmanGroup',
  'createDiffieHellmanGroup',
  'getDiffieHellman',
  'createDiffieHellman',
  'DiffieHellman'
].forEach(function (key) {
  exports[key] = dh[key]
})

var sign = require('browserify-sign')
;[
  'createSign',
  'Sign',
  'createVerify',
  'Verify'
].forEach(function (key) {
  exports[key] = sign[key]
})

exports.createECDH = require('create-ecdh')

var publicEncrypt = require('public-encrypt')

;[
  'publicEncrypt',
  'privateEncrypt',
  'publicDecrypt',
  'privateDecrypt'
].forEach(function (key) {
  exports[key] = publicEncrypt[key]
})

var rf = require('randomfill')

exports.randomFill = rf.randomFill
exports.randomFillSync = rf.randomFillSync

// the least I can do is make error messages for the rest of the node.js/crypto api.
;[
  'createCredentials'
].forEach(function (name) {
  exports[name] = function () {
    throw new Error([
      'sorry, ' + name + ' is not implemented yet',
      'we accept pull requests',
      'https://github.com/crypto-browserify/crypto-browserify'
    ].join('\n'))
  }
})