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unleash.unleash/docs/securing-unleash.md
2020-02-20 08:34:24 +01:00

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id title
securing_unleash Securing Unleash

The Unleash API is split into two different paths: /api/client and /api/admin. This makes it easy to have different authentication strategy for the admin interface and the client-api used by the applications integrating with Unleash.

General settings

Unleash uses an encrypted cookie to maintain a user session. This allows users to be logged in across multiple instances of Unleash. To protect this cookie, you should specify the secret option when starting Unleash.

Securing the Admin API

To secure the Admin API, you have to tell Unleash that you are using a custom admin authentication and implement your authentication logic as a preHook. You should also set the secret option to a protected secret in your system.

const unleash = require('unleash-server');
const myCustomAdminAuth = require('./auth-hook');

unleash
  .start({
    databaseUrl: 'postgres://unleash_user:passord@localhost:5432/unleash',
    secret: 'super-duper-secret',
    adminAuthentication: 'custom',
    preRouterHook: myCustomAdminAuth,
  })
  .then(unleash => {
    console.log(
      `Unleash started on http://localhost:${unleash.app.get('port')}`,
    );
  });

Additionally, you can trigger the admin interface to prompt the user to sign in by configuring your middleware to return a 401 status on protected routes. The response body must contain a message and a path used to redirect the user to the proper login route.

{
  "message": "You must be logged in to use Unleash",
  "path": "/custom/login"
}

Examples of custom authentication hooks:

We also have a version of Unleash deployed on Heroku which uses Google OAuth 2.0: https://secure-unleash.herokuapp.com

Securing the Client API

A common way to support client access is to use pre-shared secrets. This can be solved by having clients send a shared key in an HTTP header with every client request to the Unleash API. All official Unleash clients should support this.

In the Java client this would look like this:

UnleashConfig unleashConfig = UnleashConfig.builder()
  .appName("my-app")
  .instanceId("my-instance-1")
  .unleashAPI(unleashAPI)
  .customHttpHeader("Authorization", "12312Random")
  .build();

On the Unleash server side, you need to implement a preRouter hook which verifies that all calls to /api/client include this pre-shared key in the defined header. This could look something like this.

const unleash = require('unleash-server');
const sharedSecret = '12312Random';

unleash
  .start({
    databaseUrl: 'postgres://unleash_user:passord@localhost:5432/unleash',
    enableLegacyRoutes: false,
    preRouterHook: app => {
      app.use('/api/client', (req, res, next) => {
        if (req.header('authorization') !== sharedSecret) {
          res.sendStatus(401);
        } else {
          next();
        }
      });
    },
  })
  .then(unleash => {
    console.log(
      `Unleash started on http://localhost:${unleash.app.get('port')}`,
    );
  });

client-auth-unleash.js

PS! Remember to disable legacy routes by setting the enableLegacyRoutes option to false. This will require all your clients to be on v3.x.