api-key-auth

Express/Restify middleware to authenticate HTTP requests based on api key and signature.

Installation

$ npm install --save api-key-auth

Usage

This middleware authenticates callers using an api key and the signature of the request. If the api key and the signature are valid, req.credentials will be set with the calling application information.

Example

This basic usage example should help you get started :

const express = require('express');
const apiKeyAuth = require('api-key-auth');

const app = express();

// Create the collection of api keys
const apiKeys = new Map();
apiKeys.set('123456789', {
  id: 1,
  name: 'app1',
  secret: 'secret1'
});
apiKeys.set('987654321', {
  id: 2,
  name: 'app2',
  secret: 'secret2'
});

// Your function to get the secret associated to the key id
function getSecret(keyId, done) {
  if (!apiKeys.has(keyId)) {
    return done(new Error('Unknown api key'));
  }
  const clientApp = apiKeys.get(keyId);
  done(null, clientApp.secret, {
    id: clientApp.id,
    name: clientApp.name
  });
}

app.use(apiKeyAuth({ getSecret }));

app.get('/protected', (req, res) => {
  res.send(`Hello ${req.credentials.name}`);
});

app.listen(8080);

API

apiKeyAuth(options)

Create an api key based authentication middleware function using the given options :

Name	Type	Default	Description
getSecret	Function	-	Invoked to retrieve the secret from the keyId
requestProperty	String	'credentials'	The request property to attach the information
requestLifetime	`Number	null`	300

options.getSecret (REQUIRED)

A function with signature function(keyId, done) to be invoked to retrieve the secret from the keyId.

• keyId (String) - The api key used to retrieve the secret.

• done (Function) - A function with signature function(err, secret, credentials) to be invoked when the secret is retrieved.

  • err (Error) - The error that occurred.
  • secret (String) - The secret to use to verify the signature.
  • credentials (Object) - req.credentials will be set with this object.

options.requestProperty (OPTIONAL)

By default, you can attach information about the client application on req.credentials but can be configured with the requestProperty option.

options.requestLifetime (OPTIONAL)

The lifetime of a request in second, by default is set to 300 seconds, set it to null to disable it. This options is used if HTTP header "date" is used to create the signature.

HTTP signature scheme

Look "HTTP signature scheme" to sign a HTTP request.

License

The MIT License (MIT)

Copyright (c) 2018 Axel SHAÏTA mailto:shaita.axel@gmail.com

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.