create random AES-256 key in hex -- compatible with Google Cloud Storage

createStorageKey.js

// Copyright 2017 Paul Brewer, Economic and Financial Technology Consulting LLC <drpaulbrewer@eaftc.com>                                                                                                            
// License: The MIT License.  See: https://opensource.org/licenses/MIT                                                                                                                                              
                                                                                                                                                                                                                    
// Google has an example using base64; hex is a little safer to copy/paste and recognize as incorect                                                                                                                
// see https://cloud.google.com/storage/docs/using-encryption-keys                                                                                                                                                  
                                                                                                                                                                                                                    
const crypto = require('crypto');                                                                                                                                                                                   
console.log("hex AES-256 random key follows");                                                                                                                                                                      
const key = crypto.randomBytes(32);                                                                                                                                                                                 
console.log(key.toString('hex'));