express-escher

Express middleware to validate requests signed by Escher

Install

Yarn

$ yarn add express-escher

NPM

$ npm install --save express-escher

Usage

Protect all endpoints

const express = require('express');
const app = express();
const expressEscher = require('express-escher');

const keyDb = clientKey => 'TheBeginningOfABeautifulFriendship';

app.use(expressEscher({
  credentialScope: 'example/credential/scope',
  keyDb
}));

app.get('/checkout', (req, res) => {
  res.json({success: true});
});

app.listen(3000, () => {
  console.log('Express server is running on port 3000.');
});

Protect only specific endpoints

const express = require('express');
const app = express();
const expressEscher = require('express-escher');

const keyDb = clientKey => 'TheBeginningOfABeautifulFriendship';

const isAuthenticated = (req, res, next) => {
  return expressEscher({
    credentialScope: 'example/credential/scope',
    keyDb
  })(req, res, next);
};

app.get('/checkout', isAuthenticated, (req, res) => {
  res.json({success: true});
});

app.listen(3000, () => {
  console.log('Express server is running on port 3000.');
});

API

expressEscher(options)

Returns the authentication middleware function.

options

Type: Object

A collection of options for configuring both the middleware and Escher itself.

credentialScope

Type: string Default: ''

A slash separated service constant and hierarchical ID, containing the service’s scope. See details in Escher spec.

keyDB

Type: function

A function, which takes a clientKey as an argument, and returns a client secret, if found. Ideally, this can be hooked up to a database, or just a simple collection of client keys/secrets.

Escher

Type: 'function' Default: require('escher-auth')

Swappable Escher implementation.

License

MIT © Máté Farkas