formatting

src/PassportServiceProvider.php

@@ -4,7 +4,6 @@
 
 use DateInterval;
 use Illuminate\Auth\Events\Logout;
-use Illuminate\Config\Repository as Config;
 use Illuminate\Contracts\Auth\StatefulGuard;
 use Illuminate\Support\Facades\Auth;
 use Illuminate\Support\Facades\Cookie;
@@ -249,7 +248,7 @@ protected function registerResourceServer(): void
      */
     protected function makeCryptKey(string $type): CryptKey
     {
-        $key = str_replace('\\n', "\n", $this->app->make(Config::class)->get("passport.{$type}_key") ?? '');
+        $key = str_replace('\\n', "\n", config("passport.{$type}_key") ?? '');
 
         if (! $key) {
             $key = 'file://'.Passport::keyPath('oauth-'.$type.'.key');

tests/Feature/PassportServiceProviderTest.php

@@ -0,0 +1,56 @@
+<?php
+
+namespace Laravel\Passport\Tests\Feature;
+
+use Laravel\Passport\Passport;
+use Laravel\Passport\PassportServiceProvider;
+
+class PassportServiceProviderTest extends PassportTestCase
+{
+    protected function tearDown(): void
+    {
+        @unlink(__DIR__.'/../keys/oauth-private.key');
+    }
+
+    public function test_can_use_crypto_keys_from_config()
+    {
+        $privateKey = openssl_pkey_new();
+
+        openssl_pkey_export($privateKey, $privateKeyString);
+
+        config(['passport.private_key' => $privateKeyString]);
+
+        $provider = new PassportServiceProvider($this->app);
+
+        // Call protected makeCryptKey method
+        $cryptKey = (fn () => $this->makeCryptKey('private'))->call($provider);
+
+        $this->assertSame(
+            $privateKeyString,
+            $cryptKey->getKeyContents()
+        );
+    }
+
+    public function test_can_use_crypto_keys_from_local_disk()
+    {
+        Passport::loadKeysFrom(__DIR__.'/../keys');
+
+        $privateKey = openssl_pkey_new();
+
+        openssl_pkey_export_to_file($privateKey, __DIR__.'/../keys/oauth-private.key');
+        openssl_pkey_export($privateKey, $privateKeyString);
+        chmod(__DIR__.'/../keys/oauth-private.key', 0600);
+
+        config(['passport.private_key' => null]);
+
+        $provider = new PassportServiceProvider($this->app);
+
+        // Call protected makeCryptKey method
+        $cryptKey = (fn () => $this->makeCryptKey('private'))->call($provider);
+
+        $this->assertSame(
+            $privateKeyString,
+            file_get_contents($cryptKey->getKeyPath())
+        );
+    }
+}