Node OAuth2 Server

Complete, compliant and well tested module for implementing an OAuth2 Server/Provider with express in node.js

2.0

Version is under active development, for a preview see the 2.0 branch: https://github.com/nightworld/node-oauth2-server/tree/2.0

Installation

$ npm install node-oauth2-server

Quick Start

The module provides two middlewares, one for authorization and routing, another for error handling, use them as you would any other middleware:

var express = require('express'),
	oauthserver = require('node-oauth2-server');

var app = express();

app.configure(function() {
	var oauth = oauthserver({
		model: {}, // See below for specification
		grants: ['password'],
		debug: true
	});
	app.use(express.bodyParser()); // REQUIRED
	app.use(oauth.handler());
	app.use(oauth.errorHandler());
});

app.get('/', function (req, res) {
	res.send('Secret area');
});

app.listen(3000);

After running with node, visting http://127.0.0.1:3000 should present you with a json response saying your access token could not be found.

Note: As no model was actually implemented here, delving any deeper, i.e. passing an access token, will just cause a server error. See below for the specification of what's required from the model.

Features

• Supports password, refresh_token and extension (custom) grant types
• Implicitly supports any form of storage e.g. PostgreSQL, MySQL, Mongo, Redis...
• Full test suite

Limitations

• Does not yet support authorization code grant type (NOTE: this has landed in the [https://github.com/nightworld/node-oauth2-server/tree/2.0](2.0 branch) (still unstable))

Options

• string model
• Model object (see below)
• array|object allow
• Paths to allow to bypass authorisation, can take either form:
  • array, all methods allowed: ['/path1', '/path2']
  • object or arrays keyed by method: { get: ['/path1'], post: ['/path2'], all: ['/path3'] }
• Default: []
• array grants
• grant types you wish to support, currently the module supports password and refresh_token
• Default: []
• boolean debug
• If true, errors are logged to console
• Default: false
• boolean passthroughErrors
• If true, non grant errors will not be handled internally (so you can ensure a consistent format with the rest of your api)
• Default: false
• number accessTokenLifetime
• Life of access tokens in seconds
• If null, tokens will considered to never expire
• Default: 3600
• number refreshTokenLifetime
• Life of refresh tokens in seconds
• If null, tokens will considered to never expire
• Default: 1209600
• number authCodeLifetime
• Life of auth codes in seconds
• Default: 30
• regexp clientIdRegex
• Regex to match auth codes against before checking model
• Default: /^[a-z0-9-_]{3,40}$/i

Model Specification

The module requires a model object through which some aspects or storage, retrieval and custom validation are abstracted. The last parameter of all methods is a callback of which the first parameter is always used to indicate an error.

Note: see https://github.com/nightworld/node-oauth2-server/tree/master/examples/postgresql for a full model example using postgres.

Always Required

getAccessToken (bearerToken, callback)

• string bearerToken
• The bearer token (access token) that has been provided
• function callback (error, accessToken)
• mixed error
  • Truthy to indicate an error
• object accessToken
  • The access token retrieved form storage or falsey to indicate invalid access token
  • Must contain the following keys:
    • date expires
      • The date when it expires
      • null to indicate the token never expires
    • string|number user_id
      • The user_id (saved in req.user.id)

getClient (clientId, clientSecret, callback)

• string clientId
• string clientSecret
• function callback (error, client)
• mixed error
  • Truthy to indicate an error
• object client
  • The client retrieved from storage or falsey to indicate an invalid client
  • Saved in req.client
  • Must contain the following keys:
    • string client_id

grantTypeAllowed (clientId, grantType, callback)

• string clientId
• string grantType
• function callback (error, allowed)
• mixed error
  • Truthy to indicate an error
• boolean allowed
  • Indicates whether the grantType is allowed for this clientId

saveAccessToken (accessToken, clientId, userId, expires, callback)

• string accessToken
• string clientId
• string|number userId
• date expires
• function callback (error)
• mixed error
  • Truthy to indicate an error

Required for password grant type

getUser (username, password, callback)

• string username
• string password
• function callback (error, user)
• mixed error
  • Truthy to indicate an error
• object user
  • The user retrieved from storage or falsey to indicate an invalid user
  • Saved in req.user
  • Must contain the following keys:
    • string|number id

Required for refresh_token grant type

saveRefreshToken (refreshToken, clientId, userId, expires, callback)

• string refreshToken
• string clientId
• string|number userId
• date expires
• function callback (error)
• mixed error
  • Truthy to indicate an error

getRefreshToken (refreshToken, callback)

• string refreshToken
• The bearer token (access token) that has been provided
• function callback (error, accessToken)
• mixed error
  • Truthy to indicate an error
• object refreshToken
  • The refresh token retrieved form storage or falsey to indicate invalid refresh token
  • Must contain the following keys:
    • string|number client_id
      • client_id associated with this token
    • date expires
      • The date when it expires
      • null to indicate the token never expires
    • string|number user_id
      • The user_id

Optional for Refresh Token grant type

revokeRefreshToken (refreshToken, callback)

The spec does not actually require that you revoke the old token - hence this is optional (Last paragraph: http://tools.ietf.org/html/rfc6749#section-6)

• string refreshToken
• function callback (error)
• mixed error
  • Truthy to indicate an error

Required for extension grant grant type

extendedGrant (req, callback)

• object req
• The raw request
• function callback (error, supported, user)
• mixed error
  • Truthy to indicate an error
• boolean supported
  • Whether you support the grant type
• object user
  • The user retrieved from storage or falsey to indicate an invalid user
  • Saved in req.user
  • Must contain the following keys:
    • string|number id

Optional

generateToken (type, callback)

• string type
• accessToken or refreshToken
• function callback (error, token)
• mixed error
  • Truthy to indicate an error
• string|object|null token
  • string indicates success
  • null indicates to revert to the default token generator
  • object indicates a reissue (i.e. will not be passed to saveAccessToken/saveRefreshToken)
    • Must contain the following keys (if object):
      • string access_token OR refresh_token dependant on type

Extension Grants

You can support extension/custom grants by implementing the extendedGrant method as outlined above. Any requests that begin with http(s):// (as defined in the spec) will be passed to it for you to handle. You can access the grant type via req.oauth.grantType and you should pass back supported as false if you do not support it to ensure a consistent (and compliant) response.

Example using the password grant type

First you must insert client id/secret and user into storage. This is out of the scope of this example.

To obtain a token you should POST to /oauth/token. You should include your client credentials in the Authorization header ("Basic " + client_id:client_secret base4'd), and then grant_type ("password"), username and password in the request body, for example:

POST /oauth/token HTTP/1.1
Host: server.example.com
Authorization: Basic czZCaGRSa3F0MzpnWDFmQmF0M2JW
Content-Type: application/x-www-form-urlencoded

grant_type=password&username=johndoe&password=A3ddj3w

This will then call the following on your model (in this order):

• getClient (clientId, clientSecret, callback)
• grantTypeAllowed (clientId, grantType, callback)
• getUser (username, password, callback)
• saveAccessToken (accessToken, clientId, userId, expires, callback)
• saveRefreshToken (refreshToken, clientId, userId, expires, callback) (if using)

Provided there weren't any errors, this will return the following (excluding the refresh_token if you've not enabled the refresh_token grant type):

HTTP/1.1 200 OK
Content-Type: application/json;charset=UTF-8
Cache-Control: no-store
Pragma: no-cache

{
	"access_token":"2YotnFZFEjr1zCsicMWpAA",
	"token_type":"bearer",
	"expires_in":3600,
	"refresh_token":"tGzv3JOkF0XG5Qx2TlKWIA"
}

Changelog

See: https://github.com/nightworld/node-oauth2-server/releases

Credits

Copyright (c) 2013 NightWorld

Created by Thom Seddon

License

Apache, Version 2.0