OAuthenticity.js

A simple, customizable oauth2 provider for connect style node servers. Existential abstracts way the annoying validation and flow of the Oauth2 spec and lets you just plugin in your specific business logic. It is mean to be easy and only as opinionated as needed to still be oauth2

###Use

The actual creation of an oauth2 provider is fairly trivial. Rather then automatically adding routes, and middleware the createOauth2Provider() method will return a set of functions that do the necessary work. This decouples oauthenticity from any specific web server implementation

var oauth2Provider = require('oauthenticity')
  , routes;

routes = oauth2provider.createOauth2Provider(options)
/*
    routes => {
        middleware:            fn -> (req, res, cb)
        tokenEndpoint:         fn -> (req, res, cb)
        authorizationEndpoint: fn -> (req, res, cb)
    }
*/

All returned function have the same signature, each takes a node request, response object, and a third cb or callback function. this should look familiar to anyone using Express or Restify, which allows you to simply pass the functions to the routes and middleware chain

server.use(routes.middleware)
server.post('/token', routes.tokenEndpoint)
server.get('/authorization', routes.authorizationEndpoint)

you can also use oauthenticity without any particular web framework as well.

Caveats

OAuthenticity expects the request object to have a parsed body and query object. If using restify or express make sure to include these middlewares.

Options

• grants: (Array) specify which grants you wish to use es: ["authorization_grant", "password"]
• allowImplicit: (Boolean) whether to allows implicit token granting, for the authorization_code grant. If true you will be able to do response_type=token when making a request to the authorization endpoint
• tokenEndpoint: (String) the route path that grants tokens ex: '/token',
• authorizeEndpoint: (String) the route path that grants auth codes (or tokens if allowImplicit is true) ex: '/authorize'
• realm: (String) 'the porch'
• hooks: object: see below

Hooks

Hooks are a set of functions that you insert your application logic into the auth process. OAuthenticity will call the appropriate hook when it needs information. It is up to you to generate and store tokens, validate the requesting client/resource owner etc. Each grant type requires a different set of hooks, although there is some overlap.

Authorization Code

{
    generateUserToken: function(resourceOwner, null, cb ){
        //create access_token
        cb(null, accessToken)
    },
    generateRefreshToken: function ( resourceOwner, null, cb ) {
        //create refresh_token
        cb(null, refreshToken)
    }
    generateCode: function (resourceOwner, clientId, redirectUri, cb ) {
        // generate an auth code that expires. you will need to store all the arguments to return later
        cb(null, code)
    },
    validateAuthCode: function ( code, cb ) {
        //validate code and return:
        cb(null, valid, clientId, redirectUri, resourceOwner)
    },
    userAuthorization: function ( req, res, clientId, redirect_uri, cb ) {
        // validate resource owner:
        // you can use the res/req objects to redirect to a login if needed
        cb(null, user)
    }
}

Password

{
    generateUserToken: function(resourceOwner, password, cb ){
        //create access_token
        cb(null, accessToken)
    },

    generateRefreshToken: function ( resourceOwner, password, cb ) {
        //create refresh_token
        cb(null, refreshToken)
    }
}

Refresh Token

{
    generateUserToken: function(refreshToken, null, cb ){
        //create access_token
        cb(null, accessToken)
    },

    generateRefreshToken: function ( refreshToken, null, cb ) {
        //create refresh_token
        cb(null, refreshToken)
    },

}

Known Issues

only authorization_grant, password, and refresh_token grants are actually implemented