Divorce IDAM Express Middleware

Requirements

• Node >=8.0
• yarn

Installation

As of now, this module is published only in a private repository. We are working on publishing this project to NPM. Until then, the package can be installed from its github URL, examples:

# Install the latest version
yarn add https://github.com/hmcts/div-idam-express-middleware

# Install a specific version
yarn add https://github.com/hmcts/div-idam-express-middleware#4.0.0

Available functions

This module exposes three middleware functions that take in an object parameter. These are:

• authenticate - checks if the current user has a valid auth token cookie, if not redirects them to the idam login page with a query parameter args.continueUrl to determine where the user will be sent on successful login
• landingPage - should only run on the page that idam redirects to after successful authentication. This sets auth token cookie based on the jwt query parameter passed back by idam
• protect - checks if the user has a valid auth token cookie, and makes sure it matches against the current session user details. If not, this redirects them to a page defined by the user args.indexUrl
• logout - This makes a request to idam to invalidate the session Jwt token on exit/logout. It provides the jwt token to idam as a path parameter in the http request url.

Arguments

Pass a key-value object into the parameter when making the middleware function call.

const express = require('express');
const idamExpressMiddleware = require('@hmcts/div-idam-express-middleware');

const app = express();
const args = {
  continueUrl: 'http://localhost:8090',
  indexUrl: '/index'
};

app.use(idamExpressMiddleware.landingPage(args));
app.use(idamExpressMiddleware.authenticate(args));
app.use(idamExpressMiddleware.protect(args));

List of available args

• indexUrl (required) - the url for the index page of the service, or whatever page you want the user to be redirected to on auth failure
• continueUrl (required) - passed to the idamWrapper to determine where to redirect to on successful login
• authRole - passed to the idamWrapper to determine which role to authenticate against. Default value is citizen
• queryName - the jwt token is passed back to the redirect continueUrl as a query parameter. By default the query parameter is jwt
• authTokenName - the name of the cookie that the jwt token will be saved to. By default is __auth-token
• stateCookieName - the name of the cookie that stores the state identifier. By default is state
• hostName - the main service name / url. By default is the PUBLIC_HOSTNAME environment variable
• idamApiUrl - used by the idamWrapper. The url where all API calls will be made to. By default is defined in the config file in the idamWrapper repository
• idamLoginUrl - used by the idamWrapper. The url where the user will be redirected to if they require a login for authentication. By default is defined in the config file in the idamWrapper repository