sails-hook-authorization

Hook that provides jwt authentication sails-compatible scheme, such as policies, routes, controllers, services. Based on https://github.com/saviogl/sails-hook-jwt-auth

Installation

npm install sails-hook-authorization --save

Service

This module globally expose a service which integrates with the jsonwebtoken (https://github.com/auth0/node-jsonwebtoken) and provide the interface to apply the jwt specification (http://self-issued.info/docs/draft-ietf-oauth-json-web-token.html).

module.exports.validatePassword = function(currentPassword, oldPassword) {
  return Promise.resolve(true);
};

module.exports.findAccessToken = function(req) {
  return accessToken;
};

module.exports.issueTokenForUser = function(user) {
  return token;
};

module.exports.issueToken = function(payload, options) {
  return token
};

module.exports.verifyToken = function(token) {
  return Promise.resolve(token);
};

module.exports.decodeToken = function(token, options) {
  return decodedToken;
};

module.exports.refreshToken = function(decodedToken, expiresIn) {
  return Promise.resolve(token);
};

module.exports.issueRefreshTokenForUser = function(token) {
  return token;
};

// renews the `access_token` based on the `refresh_token`
module.exports.validateRefreshToken = function(accessToken, refreshToken) {
  return Promise.resolve(tokens);
};

// set the token payload issued by login
module.exports.payloadBuilder = function (user, payload) {
  payload.foo = 'bar';

  return payload;
}

payloadBuilder()

It's possible to override payloadBuilder() with your own function. This allows you to extend/populate the token payload with custom data or logic.

properties

You can extend the token payload by giving setting sails.config.auth.jwt.payloadProperties. The user object is used to populate the properties.

Example:

  let properties = ['disabled', {groups: 'id'}];

  return {
    user    : user.id,       // default
    username: user.username, // default
    disabled: user.disabled,
    groups  : [3, 4, 6] // get the id's from an array with objects
  }

Policy

The verifyToken.js and ensureToken.js policies are just like any other Sails policy and can be applied as such. It's responsible for parsing the token from the incoming request and validating it's state.

Use it as you would use any other sails policy to enable authentication restriction to your Controllers/Actions:

module.exports.policies = {
  ...
  'AuthController': ['verifyToken', 'ensureToken'],
  ...
};

Model

This hook sets up a basic User model with some defaults attributes required to implement the jwt authentication scheme such as username, email and emailConfirmed. The User model can be extended with any property you want by defining it in your own Sails project.

Routes

These are the routes provided by this hook:

module.exports.routes = {
  'POST /login'                  : 'AuthController.login',
  'POST /signup'                 : 'AuthController.signup',
  'GET /auth/verify-email/:token': 'AuthController.verifyEmail',
  'GET /auth/me'                 : 'AuthController.me',
  'POST /auth/refresh-token'     : 'AuthController.refreshToken'
};

POST /auth/login

The request to this route /auth/login must be sent with these body parameters:

{
  email   : '[email protected]', // or username based on the `loginProperty`
  password: 'test123'
}

The response:

{
  access_token : 'jwt_access_token',
  refresh_token: 'jwt_refresh_token'
}

Make sure that you provide the acquired token in every request made to the protected endpoints, as query parameter access_token or as an HTTP request Authorization header Bearer TOKEN_VALUE.

The default TTL of the access_token is 1 day, refresh_token is 30 days. If the access_token is expired you can expect the expired_token error.

POST /auth/signup

The request to this route /signup must be sent with these body parameters:

{
  username       : 'test',
  email          : '[email protected]',
  password       : 'test123'
}

If the email verification feature is disabled, the response will be the same as the /auth/login.

{
  access_token : 'new jwt access token',
  refresh_token: 'new jwt refresh token'
}

If it's enabled you will get a 200 as response:

GET /auth/activate/:token

Account Activation

This feature is off by default and to enable it you must override the requireEmailVerification configuration and implement the function sendVerificationEmail:

module.exports.auth = {
  secret                  : process.env.JWT_SECRET || 'superSecretForDev',
  loginProperty           : 'email',
  requireEmailVerification: false,
  sendVerificationEmail   : (user, activateUrl) => {
    sails.log.error('sails-hook-authorization:: An email function must be implemented through `sails.config.auth.sendVerificationEmail` in order to enable the email verification feature. This will receive two parameters (user, activationLink).');
  },

  // seconds to be valid
  ttl: {
    accessToken : process.env.JWT_TOKEN_TTL || 86400,  // 1 day
    refreshToken: process.env.JWT_REFRESH_TOKEN_TTL || 2592000 // 30 days
  }
};

GET /auth/me

Returns the user, token protected area.

POST /auth/refresh-token

Refreshes the access_token based on the refresh_token. If the refresh_token is expired it will return expired_refresh_token and the user must login through /login

The request:

{
  access_token : 'jwt access token',
  refresh_token: 'jwt refresh token'
}

The response:

{
  access_token : 'new jwt access token',
  refresh_token: 'new jwt refresh token'
}

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