@react-native-module/randombytes/lib/cjs/randomBytesWithoutNativeModule.js

implementation of randomBytes for React Native

'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

var buffer = require('buffer');
var constants = require('./constants.js');
var randomJs = require('random-js');

function randomBytesWithoutNativeModule(size, callback) {
    const random = new randomJs.Random();
    const randomHex = random.hex(size * 2);
    let randomBytes = buffer.Buffer.from(randomHex, 'hex');
    // this is the max bytes crypto.getRandomValues
    // https://github.com/crypto-browserify/randombytes/blob/f18ded32b209f0d4c637608a11ae042ae96b4c2e/browser.js#L31
    if (size > constants.MAX_BYTES) {
        randomBytes = buffer.Buffer.from(randomBytes.subarray(0, constants.MAX_BYTES));
    }
    if (callback != null) {
        callback(null, randomBytes);
    }
    else {
        return randomBytes;
    }
}

exports.randomBytesWithoutNativeModule = randomBytesWithoutNativeModule;