Sign In With Apple for Laravel

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• LIX

Table of Contents

• Requirements
• Installation
• Configuration
• Implementation
  • Button
  • Controller

Requirements

• PHP 7.3+
• Laravel 8.0+
• Socialite 5.0+
• Apple Developer Subscription

Installation

1. Install the composer package:

   composer require genealabs/laravel-sign-in-with-apple

   We also recommend using geneaLabs/laravel-socialiter to automatically manage user resolution and persistence:

   composer require genealabs/laravel-socialiter

Configuration

1. Create an App ID for your website (https://developer.apple.com/account/resources/identifiers/list/bundleId) with the following details:

   • Platform: iOS, tvOS, watchOS (I'm unsure if either choice has an effect for web apps)
   • Description: (something like "example.com app id")
   • Bundle ID (Explicit): com.example.id (or something similar)
   • Check "Sign In With Apple"

2. Create a Service ID for your website (https://developer.apple.com/account/resources/identifiers/list/serviceId) with the following details:

   • Description: (something like "example.com service id")
   • Identifier: com.example.service (or something similar)
   • Check "Sign In With Apple"
   • Configure "Sign In With Apple":
     • Primary App Id: (select the primary app id created in step 1)
     • Web Domain: example.com (the domain of your web site)
     • Return URLs: https://example.com/apple-signin (the route pointing to the callback method in your controller)
     • Click "Save".
     • Click the "Edit" button to edit the details of the "Sign In With Apple" configuration we just created.
     • If you haven't verified the domain yet, download the verification file, upload it to https://example.com/.well-known/apple-developer-domain-association.txt, and then click the "Verify" button.

3. Create a Private Key for your website (https://developer.apple.com/account/resources/authkeys/list) with the following details:

   • Key Name:
   • Check "Sign In With Apple"
   • Configure "Sign In With Apple":
     • Primary App ID: (select the primary app id created in step 1)
     • Click "Save"
   • Click "Continue"
   • Click "Register"
   • Click "Download"
   • Rename the downloaded file to key.txt

4. Create your app's client secret:

   • Install the JWT Gem:

     sudo gem install jwt

   • Create a file called client_secret.rb to process the private key:

     require 'jwt'
     
     key_file = 'key.txt'
     team_id = ''
     client_id = ''
     key_id = ''
     
     ecdsa_key = OpenSSL::PKey::EC.new IO.read key_file
     
     headers = {
     'kid' => key_id
     }
     
     claims = {
         'iss' => team_id,
         'iat' => Time.now.to_i,
         'exp' => Time.now.to_i + 86400*180,
         'aud' => 'https://appleid.apple.com',
         'sub' => client_id,
     }
     
     token = JWT.encode claims, ecdsa_key, 'ES256', headers
     
     puts token

   • Fill in the following fields:

     • team_id: This can be found on the top-right corner when logged into your Apple Developer account, right under your name.
     • client_id: This is the identifier from the Service Id created in step 2 above, for example com.example.service
     • key_id: This is the identifier of the private key created in step 3 above.

   • Save the file and run it from the terminal. It will spit out a JWT which is your client secret, which you will need to add to your .env file in the next step.

     ruby client_secret.rb

5. Set the necessary environment variables in your .env file:

   SIGN_IN_WITH_APPLE_LOGIN="/apple/login/controller/login/action"
   SIGN_IN_WITH_APPLE_REDIRECT="/apple/login/controller/callback/action"
   SIGN_IN_WITH_APPLE_CLIENT_ID="your app's service id as registered with Apple"
   SIGN_IN_WITH_APPLE_CLIENT_SECRET="your app's client secret as calculated in step 4"

Implementation

Button

Add the following blade directive to your login page:

@signInWithApple($color, $hasBorder, $type, $borderRadius)

Parameter	Definition
$color	String, either "black" or "white.
$hasBorder	Boolean, either true or false.
$type	String, either "sign-in" or "continue".
$borderRadius	Integer, greater or equal to 0.

Controller

This implementation uses Socialite to get the login credentials. The following is an example implementation of the controller:

<?php

namespace App\Http\Controllers\Auth;

use App\Http\Controllers\Controller;
use GeneaLabs\LaravelSocialiter\Facades\Socialiter;
use Laravel\Socialite\Facades\Socialite;

class AppleSigninController extends Controller
{
    public function __construct()
    {
        $this->middleware('guest')->except('logout');
    }

    public function login()
    {
        return Socialite::driver("sign-in-with-apple")
            ->scopes(["name", "email"])
            ->redirect();
    }

    public function callback(Request $request)
    {
        // get abstract user object, not persisted
        $user = Socialite::driver("sign-in-with-apple")
            ->user();
        
        // or use Socialiter to automatically manage user resolution and persistence
        $user = Socialiter::driver("sign-in-with-apple")
            ->login();
    }
}

Note that when processing the returned $user object, it is critical to know that the sub element is the unique identifier for the user, NOT the email address. For more details, visit https://developer.apple.com/documentation/signinwithapplerestapi/authenticating_users_with_sign_in_with_apple.

---

Credits

1. https://developer.okta.com/blog/2019/06/04/what-the-heck-is-sign-in-with-apple
2. https://developer.apple.com/sign-in-with-apple/get-started

---

Commitment to Quality

During package development I try as best as possible to embrace good design and development practices, to help ensure that this package is as good as it can be. My checklist for package development includes:

• ✅ Achieve as close to 100% code coverage as possible using unit tests.
• ✅ Eliminate any issues identified by SensioLabs Insight and Scrutinizer.
• ✅ Be fully PSR1, PSR2, and PSR4 compliant.
• ✅ Include comprehensive documentation in README.md.
• ✅ Provide an up-to-date CHANGELOG.md which adheres to the format outlined at http://keepachangelog.com.
• ✅ Have no PHPMD or PHPCS warnings throughout all code.

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