Serverless Authentication

This project is aimed to be a generic authentication boilerplate for the Serverless framework.

This boilerplate is compatible with the Serverless v.1.0.0, to install Serverless framework run npm install -g serverless.

Webapp demo that uses this boilerplate: http://laardee.github.io/serverless-authentication-gh-pages

If you are using Serverless framework v.0.5, see branch https://github.com/laardee/serverless-authentication-boilerplate/tree/serverless-0.5

Installation

Installation will create one DynamoDB table for OAuth state and refresh tokens.

1. Run serverless install --url https://github.com/laardee/serverless-authentication-boilerplate, clone or download the repository
2. Rename example.env.yml in authentication to env.yml and set environmental variables.
3. Change directory to authentication and run npm install.
4. Run serverless deploy on the authentication folder to deploy authentication service to AWS. Notice the arn of the authorize function.
5. (optional) Change directory to test-token and insert the arn of the authorizer function to authorizer/arn in serverless.yml. Then run serverless deploy to deploy test-token service.

If you wish to change the cache db name, change CACHE_DB_NAME in .env file and TableName in serverless.yml in Dynamo resource.

Set up Authentication Provider Application Settings

The redirect URI that needs to be defined in oauth provider's application settings is the callback endpoint of the API. For example if you use facebook login, the redirect URI is https://API-ID.execute-api.us-east-1.amazonaws.com/dev/authentication/callback/facebook and for google https://API-ID.execute-api.us-east-1.amazonaws.com/dev/authentication/callback/google.

Services

In this example project authentication and authorization services are separated from content API (test-token).

Authentication

Authentication service and authorization function for content API. These can also be separated if needed.

Functions:

• authentication/signin
  • endpoint: /authentication/signin/{provider}, redirects to oauth provider login page
  • handler: signin function creates redirect url to oauth provider and saves state to DynamoDB
• authentication/callback
  • endpoint: /authentication/callback/{provider}, redirects back to client webapp with token url parameter
  • handler: function is called by oauth provider with code and state parameters and it creates authorization and refresh tokens
• authentication/refresh
  • endpoint: /authentication/refresh/{refresh_token}, returns new authentication token and refresh token
  • handler: function revokes refresh token
• authentication/authorize
  • endpoint: no end point
  • handler: is used by Api Gateway custom authorizer
• authentication/schema
  • invoke with serverless invoke -f schema to setup FaunaDB schema

Test-token

Simulates content API.

Functions:

• test-token/test-token
  • endpoint: /test-token
  • handler: test-token function can be used to test custom authorizer, it returns principalId of custom authorizer policy. It is mapped as username in request template.

Environmental Variables

Open authentication/env.yml, fill in what you use and other ones can be deleted.

dev:
# General
  SERVICE: ${self:service}
  STAGE: ${opt:stage, self:provider.stage}
  REGION: ${opt:region, self:provider.region}
  REDIRECT_CLIENT_URI: http://127.0.0.1:3000/
  TOKEN_SECRET: token-secret-123
# Database
  CACHE_DB_NAME: ${self:provider.environment.SERVICE}-cache-${self:provider.environment.STAGE}
  USERS_DB_NAME: ${self:provider.environment.SERVICE}-users-${self:provider.environment.STAGE}
# Cognito
  USER_POOL_ID: user-pool-id
# Providers
  PROVIDER_FACEBOOK_ID: fb-mock-id
  PROVIDER_FACEBOOK_SECRET: fb-mock-secret
  PROVIDER_GOOGLE_ID: g-mock-id
  PROVIDER_GOOGLE_SECRET: cg-mock-secret
  PROVIDER_MICROSOFT_ID: ms-mock-id
  PROVIDER_MICROSOFT_SECRET: ms-mock-secret
  PROVIDER_CUSTOM_GOOGLE_ID: g-mock-id
  PROVIDER_CUSTOM_GOOGLE_SECRET: cg-mock-secret

Example Provider Packages

• facebook serverless-authentication-facebook
• google serverless-authentication-google
• windows live serverless-authentication-microsoft
• more to come

Custom Provider

Package contains example /authentication/lib/custom-google.js how to implement custom authentication provider using generic Provider class. To test custom provider go to http://laardee.github.io/serverless-authentication-gh-pages and click 'custom-google' button.

User database

To use FaunaDB to save user data. First create a database here, then:

1. configure FAUNADB_SECRET in authentication/env.yml with a server secret for your database
2. uncomment return faunaUser.saveUser(profile); from authentication/lib/storage/usersStorage.js
3. change the last line of authentication/lib/storage/cacheStorage.js to exports = module.exports = faunaCache;
4. Run serverless deploy and then serverless invoke -f schema

To use DynamoBD to save user data:

1. uncomment UsersTable block from authentication/serverless.yml resources
2. uncomment return dynamoUser.saveUser(profile); from authentication/lib/storage/usersStorage.js

To use Cognito User Pool as user database:

1. create new user pool (http://docs.aws.amazon.com/cognito/latest/developerguide/setting-up-cognito-user-identity-pools.html)
2. copy user pool id to authentication/env.yml
3. uncomment return saveCognito(profile); from authentication/lib/storage/usersStorage.js

Running Tests on Mac

• Install Docker and Docker Compose
• Run npm install in project root directory
• Run ./run-tests.sh