How to implement single sign-on (SSO) in Laravel



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Implementing Single Sign-On (SSO) in Laravel typically involves using a package or a combination of packages to handle authentication across multiple applications. Laravel provides a flexible and extensible authentication system, and there are several packages available that can help you achieve SSO functionality. One popular choice is the Laravel Passport package for OAuth2.

Here's a step-by-step guide to implementing SSO in Laravel using Laravel Passport:

Step 1: Install Laravel Passport

Install Laravel Passport using Composer:

bash
composer require laravel/passport

Step 2: Run Migrations

Run the migration command to create the necessary database tables for Passport:

bash
php artisan migrate

Step 3: Install Passport Keys

Generate the encryption keys needed for Passport:

bash
php artisan passport:install

Step 4: Configure AuthServiceProvider

In your AuthServiceProvider (usually located at app/Providers/AuthServiceProvider.php), add the following lines:

php
use Laravel\Passport\Passport;

public function boot()
{
    $this->registerPolicies();

    Passport::routes();
}

Step 5: Update User Model

Make sure your User model implements the HasApiTokens trait:

php
use Laravel\Passport\HasApiTokens;

class User extends Authenticatable
{
    use HasApiTokens, Notifiable;

    // ...
}

Step 6: Configure API Routes

In your routes/api.php file, define the routes that you want to protect with Passport:

php
Route::middleware('auth:api')->get('/user', function (Request $request) {
    return $request->user();
});

Step 7: Update .env

Update your .env file with the following Passport-related configurations:

env
PASSPORT_PERSONAL_ACCESS_CLIENT_ID=client-id

PASSPORT_PERSONAL_ACCESS_CLIENT_SECRET=client-secret

Step 8: Create OAuth Client

Create a new OAuth client using the following Artisan command:

bash
php artisan passport:client --personal

Step 9: Use Passport Middleware

Protect your routes with the Passport middleware. Add the auth:api middleware to the routes you want to protect.

Step 10: Cross-Domain Cookie Setup (Optional)

If you are working with multiple domains, consider setting up CORS (Cross-Origin Resource Sharing) and ensure your cookies are configured correctly for cross-domain use.

Step 11: Implement SSO in Other Applications

Repeat the steps above in other Laravel applications that need to participate in the SSO.

Conclusion

This is a high-level overview of the process. Depending on your specific requirements, you may need to adjust the implementation. Laravel Passport documentation is a valuable resource for more in-depth information: Laravel Passport Documentation. Additionally, consider other SSO solutions or packages if they better suit your needs, such as Laravel Sanctum or third-party packages.






=== Happy Coding :)

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