Azure Active Directory Authentication

To get started, run the setup command:

yarn rw setup auth azure-active-directory

This installs all the packages, writes all the files, and makes all the code modifications you need. For a detailed explanation of all the api- and web-side changes that aren't exclusive to Azure, see the top-level Authentication doc. For now, let's focus on Azure's side of things.

Follow the steps in Single-page application: App registration. After registering your app, you'll be redirected to its "Overview" section. We're interested in two credentials here, "Application (client) ID" and "Directory (tenant) ID". Go ahead and copy "Application (client) ID" to your .env file as AZURE_ACTIVE_DIRECTORY_CLIENT_ID. But "Directory (tenant) ID" needs a bit more explanation.

Azure has an option called "Authority". It's a URL that specifies a directory that MSAL (Microsoft Authentication Library) can request tokens from. You can read more about it here, but to cut to the chase, you probably want https://login.microsoftonline.com/${tenantId} as your Authority, where tenantId is "Directory (tenant) ID".

After substituting your app's "Directory (tenant) ID" in the URL, add it to your .env file as AZURE_ACTIVE_DIRECTORY_AUTHORITY. All together now:

.env

AZURE_ACTIVE_DIRECTORY_CLIENT_ID="..."
# Where `tenantId` is your app's "Directory (tenant) ID"
AZURE_ACTIVE_DIRECTORY_AUTHORITY="https://login.microsoftonline.com/${tenantId}"

Ok, back to Single-page application: App registration. At the end, it says...

Next, configure the app registration with a Redirect URI to specify where the Microsoft identity platform should redirect the client along with any security tokens. Use the steps appropriate for the version of MSAL.js you're using in your application:

• MSAL.js 2.0 with auth code flow (recommended)
• MSAL.js 1.0 with implicit flow

Redwood uses MSAL.js 2.0 with auth code flow, so follow the steps there next. When it asks you for a Redirect URI, enter http://localhost:8910 and http://localhost:8910/login, and copy these into your .env file as AZURE_ACTIVE_DIRECTORY_REDIRECT_URI and AZURE_ACTIVE_DIRECTORY_LOGOUT_REDIRECT_URI:

Can't add multiple URI's?

Configure one, then you'll be able to configure another.

.env

AZURE_ACTIVE_DIRECTORY_CLIENT_ID="..."
# Where `tenantId` is your app's "Directory (tenant) ID"
AZURE_ACTIVE_DIRECTORY_AUTHORITY="https://login.microsoftonline.com/${tenantId}"
AZURE_ACTIVE_DIRECTORY_REDIRECT_URI="http://localhost:8910"
AZURE_ACTIVE_DIRECTORY_LOGOUT_REDIRECT_URI="http://localhost:8910/login"

That's it for .env vars. Don't forget to include them in the includeEnvironmentVariables array in redwood.toml:

redwood.toml

[web]
  # ...
  includeEnvironmentVariables = [
    "AZURE_ACTIVE_DIRECTORY_CLIENT_ID",
    "AZURE_ACTIVE_DIRECTORY_AUTHORITY",
    "AZURE_ACTIVE_DIRECTORY_REDIRECT_URI",
    "AZURE_ACTIVE_DIRECTORY_LOGOUT_REDIRECT_URI",
  ]

Now let's make sure everything works: if this is a brand new project, generate a home page. There we'll try to sign up by destructuring signUp from the useAuth hook (import that from 'src/auth'). We'll also destructure and display isAuthenticated to see if it worked:

yarn rw g page home /

web/src/pages/HomePage.tsx

import { useAuth } from 'src/auth'

const HomePage = () => {
  const { isAuthenticated, signUp } = useAuth()

  return (
    <>
      {/* MetaTags, h1, paragraphs, etc. */}

      <p>{JSON.stringify({ isAuthenticated })}</p>
      <button onClick={signUp}>Sign Up</button>
    </>
  )
}

Roles

To add roles exposed via the roles claim, follow Add app roles to your application and receive them in the token.

logIn Options

options in logIn(options?) is of type RedirectRequest and is a good place to pass in optional scopes to be authorized. By default, MSAL sets scopes to /.default which is built in for every application that refers to the static list of permissions configured on the application registration. Furthermore, MSAL will add openid and profile to all requests. In the example below we explicit include User.Read.All in the login scope.

await logIn({
  scopes: ['User.Read.All'], // becomes ['openid', 'profile', 'User.Read.All']
})

See loginRedirect, PublicClientApplication class and Scopes Behavior for more documentation.

getToken Options

options in getToken(options?) is of type RedirectRequest. By default, getToken will be called with scope ['openid', 'profile']. Since Azure Active Directory applies incremental consent, we can extend the permissions from the login example by including another scope, for example Mail.Read:

await getToken({
  scopes: ['Mail.Read'], // becomes ['openid', 'profile', 'User.Read.All', 'Mail.Read']
})

See acquireTokenSilent, Resources and Scopes or full class documentation for more.

Azure Active Directory B2C-specific configuration

You can design your own auth flow with Azure Active Directory B2C using hosted user flows. Using it requires two extra settings.

Update the .env file:

.env

AZURE_ACTIVE_DIRECTORY_AUTHORITY=https://{your-microsoft-tenant-name}.b2clogin.com/{{your-microsoft-tenant-name}}.onmicrosoft.com/{{your-microsoft-user-flow-id}}
AZURE_ACTIVE_DIRECTORY_JWT_ISSUER=https://{{your-microsoft-tenant-name}}.b2clogin.com/{{your-microsoft-tenant-id}}/v2.0/
AZURE_ACTIVE_DIRECTORY_KNOWN_AUTHORITY=https://{{your-microsoft-tenant-name}}.b2clogin.com

Here's an example:

.env.example

AZURE_ACTIVE_DIRECTORY_AUTHORITY=https://rwauthtestb2c.b2clogin.com/rwauthtestb2c.onmicrosoft.com/B2C_1_signupsignin1
AZURE_ACTIVE_DIRECTORY_JWT_ISSUER=https://rwauthtestb2c.b2clogin.com/775527ef-8a37-4307-8b3d-cc311f58d922/v2.0/
AZURE_ACTIVE_DIRECTORY_KNOWN_AUTHORITY=https://rwauthtestb2c.b2clogin.com

And don't forget to add AZURE_ACTIVE_DIRECTORY_KNOWN_AUTHORITY to the includeEnvironmentVariables array in redwood.toml. (AZURE_ACTIVE_DIRECTORY_JWT_ISSUER is only used on the API side. But more importantly, it's sensitive—do not include it in the web side.)

Update activeDirectoryClient instance

This lets the MSAL web-side client know about our new B2C authority:

web/src/auth.{js,ts}

const azureActiveDirectoryClient = new PublicClientApplication({
  auth: {
    clientId: process.env.AZURE_ACTIVE_DIRECTORY_CLIENT_ID,
    authority: process.env.AZURE_ACTIVE_DIRECTORY_AUTHORITY,
    redirectUri: process.env.AZURE_ACTIVE_DIRECTORY_REDIRECT_URI,
    postLogoutRedirectUri:
      process.env.AZURE_ACTIVE_DIRECTORY_LOGOUT_REDIRECT_URI,
    knownAuthorities: [process.env.AZURE_ACTIVE_DIRECTORY_KNOWN_AUTHORITY],
  },
})

Now you can call the logIn and logOut functions from useAuth(), and everything should just work.

Here's a few more links to relevant documentation for reference:

• Overview of tokens in Azure Active Directory B2C
• Working with MSAL.js and Azure AD B2C