rspec/rules/S5739/javascript/rule.adoc

include::../description.adoc[]

include::../ask-yourself.adoc[]

include::../recommended.adoc[]

== Sensitive Code Example

In Express.js application the code is sensitive if the https://www.npmjs.com/package/helmet[helmet] or https://www.npmjs.com/package/hsts[hsts] middleware are not used or used without recommended values:

----
const express = require('express');
const hsts = require('hsts');

let app = express();

app.use(hsts({
  maxAge: 3153600, // Sensitive, recommended >= 15552000
  includeSubDomains: false, // Sensitive, recommended 'true'
}));
----

== Compliant Solution

In Express.js application a standard way to implement HSTS is with the https://www.npmjs.com/package/helmet[helmet] or https://www.npmjs.com/package/hsts[hsts] middleware:

----
const express = require('express');
const helmet = require('helmet');
const hsts = require('hsts');

let appHsts = express(); // Compliant

hsts.use(hsts({
  maxAge: 31536000,
  includeSubDomains: true,
}));

let appHelmet = express();  // Compliant

appHelmet.use(helmet.hsts({
  maxAge: 31536000,
  includeSubDomains: true,
}));
----

include::../see.adoc[]