README

A lightweight JWT guard for Laravel.

Installation

Install the package through composer:

composer require leadout/jwt

The package will automatically register the authentication guard.

Configuration

Configuring the package takes place solely through the guard configuration in Laravel's native auth.php configuration file.

The following example shows all the configuration that can be passed to the guard:

<?php

return [
    // ...
    
    'guards' => [
        'my-guard' => [
            'driver' => 'jwt',
            'provider' => 'users',
            'key' => 'secret-key',
            'public_key' => 'path_to_public_key_file',
            'private_key' => 'path_to_private_key_file',
            'ttl' => 60,
            'claims' => [
                'key' => 'value'
            ]
        ]
    ]
    
    // ...
];

The provider should be defined in the providers array in the authentication configuration file.

The key is used for encoding and decoding the tokens and should be kept secret.

If not using a single key for both encoding and decoding, the public_key and private_key should point to the public and private keys that are used for encoding and decoding the tokens.

The ttl value is the time-to-live for the token in minutes. This field can be omitted from the config. If omitted, the default time-to-live for tokens is set to 60 minutes.

Additional claims that should be added to all tokens issued through the guard should be added to the claims configuration. This configuration key can be omitted.

Usage

Since the guard is purely configured through Laravel's native auth configuration, it is recommended only instantiating it through the auth manager:

$guard = auth()->guard('my-guard');

Attempting to authenticate a user

It is possible to authenticate a user given the credentials for that user. If a user cannot be authenticated with the credentials, null is returned.

$token = auth()->guard('my-guard')->attempt(['email' => 'john@example.com', 'password' => 'hidden']]);

The attempt method mimics the way that the native SessionGuard attempts to authenticate users by firing the same events:

• Illuminate\Auth\Events\Attempting when starting an attempt to authenticate.
• Illuminate\Auth\Events\Failed if the attempt fails.
• Illuminate\Auth\Events\Validated if the attempt succeeds.

Issuing a token

$token = auth()->guard('my-guard')->issue(User::first());

When a token has been issued, it should be returned to the user. The user should then pass the token to the application as a bearer token in the Authorization header like so:

Authorization: Bearer ey...

Refreshing the token in the request

$token = auth()->guard('my-guard')->refresh();

The refreshed token will have all the claims from the original token and a fresh time-to-live.

Invalidating the token in the request

auth()->guard('my-guard')->invalidate();

When the token has been invalidated, all subsequent requests with the same token will fail.

Adding claims from the user

In addition to adding custom claims through the guard configuration, it is possible to add claims to the token from the user itself.

Simply add a getClaims() method to the user model and return an array of claims:

<?php

use Illuminate\Foundation\Auth\User as Authenticatable;

class User extends Authenticatable
{
    public function getClaims() : array
    {
        return [
            'key' => 'value'
        ];
    }
}