@envelop/auth0

@envelop/auth0

This plugin validates an JWT token created by Auth0, and injects the Auth0 user properties into your GraphQL context. With this plugin, you can implement authentication and authorization in a simple way.

The plugins is using JWKS standard in order to validate the token.

Getting Started

We recommend using the Adding Authentication with Auth0 guide if this is your first time using this plugin!

• Sign up for Auth0, create a tenant based on your needs, and then create an Auth0 Application (https://auth0.com/docs/applications).
• Setup Auth0 client based on your client app. You should be able to login on your app, and get a JWT token from Auth0. Make sure to pass that token in your GraphQL requests sent to your server, using headers (for example: Authorization: Bearer XYZ). You can find more info here: https://auth0.com/docs/quickstart/spa
• From your tenant configuration screen, find your audience and domain configurations.
• Setup Envelop with that plugin:

import { execute, parse, specifiedRules, subscribe, validate } from 'graphql'
import { useAuth0 } from '@envelop/auth0'
import { envelop, useEngine } from '@envelop/core'

const getEnveloped = envelop({
  plugins: [
    useEngine({ parse, validate, specifiedRules, execute, subscribe }),
    // ... other plugins ...
    useAuth0({
      onError: e => {}, // In case of an error, you can override it and customize the error your client will get.
      domain: 'YOUR_AUTH0_DOMAIN_HERE',
      audience: 'YOUR_AUTH0_AUDIENCE_HERE',
      headerName: 'authorization', // Name of the header
      preventUnauthenticatedAccess: true, // If you need to have unauthenticated parts on your schema, make sure to disable that by setting it to `false` and the check it in your resolvers.
      extendContextField: 'auth0', // The name of the field injected to your `context`
      tokenType: 'Bearer' // Type of token to expect in the header
    })
  ]
})

• Make sure to pass your request as part of the context building:

myHttpServer.on('request', async req => {
  const { contextFactory } = getEnveloped({ req })
  const contextValue = await contextFactory({ req }) // Make sure to pass it here
})

By default, this plugins looks for req or request properties in your base context. If you need to override it, please use extractTokenFn and you can customize it.

• You should now be able to validate user tokens, and if a user is valid, you can get the Auth0 user id (called sub) as part of your context during execution:

const myResolvers = {
  Query: {
    me: (root, args, context, info) => {
      const auth0UserId = context.auth0.sub
    }
  }
}

API Reference

jwksClientOptions

Pass this to customize the JWKS client creation. See: https://github.com/auth0/node-jwks-rsa

Setting this will override any other options defined by this plugin.

jwtDecodeOptions

Pass this to customize the JWT decode phase. See: https://www.npmjs.com/package/jws#jwsdecodesignature

jwtVerifyOptions

Pass this to customize the JWT verify phase. See: https://github.com/auth0/node-jsonwebtoken#jwtverifytoken-secretorpublickey-options-callback

onError(e: Error)

By default, this library will throw an error during context building if an error has happened.

If you wish to customize the error, you can add onError callback and throw a custom error based on your needs.

preventUnauthenticatedAccess

By default, this library will prevent execution flow and throw an error in case of an authentication error.

Setting this to false will lead to a null value in case of authentication issue (and onError will still get called).

domain

Specifies the Auth0 domain, please note that you need to specify that field with a protocol, for example: my-domain.us.auth0.com

audience

Specifies the Auth0 audience.

extractTokenFn(context: any)

If you wish to customize the token extraction from your HTTP request, override this function. It gets the context built so far as an argument, and you can extract your auth token based on your setup.

headerName + tokenType

If extractTokenFn is not set, the default behavior of this plugin is to look for req and request in the context, then look for headers and look for authentication header (you can customize it with headerName). Then, it validates that the token is of type Bearer (you can customize it with tokenType option).

extendContextField

The name of the field to inject to your context. When the user is valid, the decoded and verified payload of the JWT is injected. In most cases, the field that you need is sub (which refers to the internal Auth0 user identifier).

You can read more about the token structure here: https://auth0.com/docs/tokens/json-web-tokens/json-web-token-structure

By default, the auth0 value is used.

Notes

Make sure to specify audience field in the client, otherwise you'll get an opaque token instead of a JWT token.