Laravel - Authorization

In the previous chapter, we have studied about authentication process in Laravel. This chapter explains you the authorization process in Laravel.

Difference between Authentication and Authorization

Before proceeding further into learning about the authorization process in Laravel, let us understand the difference between authentication and authorization.

Inauthentication, the system or the web application identifies its users through the credentials they provide. If it finds that the credentials are valid, they are authenticated, or else they are not.

Inauthorization, the system or the web application checks if the authenticated users can access the resources that they are trying to access or make a request for. In other words, it checks their rights and permissions over the requested resources. If it finds that they can access the resources, it means that they are authorized.

Thus,authenticationinvolves checking the validity of the user credentials, andauthorizationinvolves checking the rights and permissions over the resources that an authenticated user has.

Authorization Mechanism in Laravel

Laravel provides a simple mechanism for authorization that contains two primary ways, namelyGatesandPolicies.

Writing Gates and Policies

Gates are used to determine if a user is authorized to perform a specified action. They are typically defined inApp/Providers/AuthServiceProvider.phpusing Gate facade. Gates are also functions which are declared for performing authorization mechanism.

Policies are declared within an array and are used within classes and methods which use authorization mechanism.

The following lines of code explain you how to use Gates and Policies for authorizing a user in a Laravel web application. Note that in this example, thebootfunction is used for authorizing the users.

 'App\Policies\ModelPolicy', ]; /** * Register any application authentication / authorization services. * * @param \Illuminate\Contracts\Auth\Access\Gate $gate * @return void */ public function boot(GateContract $gate) { $this->registerPolicies($gate); // } }

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