我正在将一些为 NodeJS 创建的包移植到 React Native,使用ReactNativify将 Node API 对象依赖项重写为它们的 browserify 等价物。
其中之一是crypto
。在transformer.js
(或.babelrc
)我有:
// The following plugin will rewrite imports. Reimplementations of node
// libraries such as `assert`, `buffer`, etc. will be picked up
// automatically by the React Native packager. All other built-in node
// libraries get rewritten to their browserify counterpart.
[require('babel-plugin-rewrite-require'), {
aliases: {
crypto: 'crypto-browserify',
// ...
},
throwForNonStringLiteral: true,
}],
在 ReactNativifyglobal.js
中有这段代码(我排除了,因为它不适合生产):
// Don't do this in production. You're going to want to patch in
// https://github.com/mvayngrib/react-native-randombytes or similar.
global.crypto = {
getRandomValues(byteArray) {
for (let i = 0; i < byteArray.length; i++) {
byteArray[i] = Math.floor(256 * Math.random());
}
},
};
.
我的第一个问题:如何
getRandomValues
正确修补生产?
还有第二个选项,那就是使用react-native-crypto
(的克隆crypto-browserify
)
理想情况下,我应该能够做到这一点transformer.js
:
aliases: {
crypto: 'react-native-crypto', // instead of 'crypto-browserify'
// ...
},
但是react-native-crypto
使用rn-nodeify而不是 ReactNativify,它会生成一个shim.js
要导入index.android.js
/index.ios.js
的代码,类似于以下代码:
if (require('./package.json').dependencies['react-native-crypto']) {
const algos = require('browserify-sign/algos')
if (!algos.sha256) {
algos.sha256 = {
"sign": "ecdsa",
"hash": "sha256",
"id": new Buffer("")
}
}
if (typeof window === 'object') {
const wCrypto = window.crypto = window.crypto || {}
wCrypto.getRandomValues = wCrypto.getRandomValues || getRandomValues
}
const crypto = require('crypto')
const randomBytes = crypto.randomBytes
crypto.randomBytes = function (size, cb) {
if (cb) return randomBytes.apply(crypto, arguments)
const arr = new Buffer(size)
getRandomValues(arr)
return arr
}
crypto.getRandomValues = crypto.getRandomValues || getRandomValues
function getRandomValues (arr) {
// console.warn('WARNING: generating insecure psuedorandom number')
for (var i = 0; i < arr.length; i++) {
arr[i] = Math.random() * 256 | 0
}
return arr
}
}
我不知道在使用 ReactNativify 时是否需要所有这些 shim 代码,并且找不到好的来源,所以......
我的第二个问题:如何以
react-native-crypto
“正确的 ReactNativify 方式”使用?
我在 ReactNativify 和 react-native-crypto repo 中创建了 github 问题:
版本:
node 7.10.1 /usr/local/bin/node
npm 4.2.0 /usr/local/bin/npm
yarn 0.24.6 /usr/bin/yarn
react-native-cli 2.0.1
app rn version 0.45.1
ignite 2.0.0 /usr/local/bin/ignite