Replace captcha package with own implementation

app/Http/Controllers/Api/DownloadApiController.php

@@ -5,7 +5,7 @@ namespace App\Http\Controllers\Api;
 use App\Http\Controllers\Controller;
 use App\Models\Downloads;
 use App\Models\Episode;
-use GrantHolle\Altcha\Rules\ValidAltcha;
+use App\Rules\ValidCaptcha;
 use Illuminate\Http\Request;
 
 class DownloadApiController extends Controller
@@ -17,7 +17,7 @@ class DownloadApiController extends Controller
     {
         $validated = $request->validate([
             'episode_id' => ['required'],
-            'captcha' => ['required', new ValidAltcha],
+            'captcha' => ['required', new ValidCaptcha],
         ]);
 
         $episode = Episode::where('id', $request->input('episode_id'))

app/Http/Controllers/Auth/CaptchaController.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace App\Http\Controllers\Auth;
+
+use AltchaOrg\Altcha\Algorithm\Pbkdf2;
+use AltchaOrg\Altcha\Altcha;
+use AltchaOrg\Altcha\CreateChallengeOptions;
+use App\Http\Controllers\Controller;
+
+class CaptchaController extends Controller
+{
+    public function create(): array
+    {
+        $pbkdf2 = new Pbkdf2;
+
+        $altcha = new Altcha(
+            hmacSignatureSecret: config('captcha.hmac_key'),
+        );
+
+        // Create challenge
+        $challenge = $altcha->createChallenge(new CreateChallengeOptions(
+            algorithm: $pbkdf2,
+            cost: 5000,
+            counter: random_int(5000, 10000),
+            expiresAt: time() + 600,
+        ));
+
+        return get_object_vars($challenge);
+    }
+}

app/Http/Controllers/Auth/RegisteredUserController.php

@@ -4,7 +4,7 @@ namespace App\Http\Controllers\Auth;
 
 use App\Http\Controllers\Controller;
 use App\Models\User;
-use GrantHolle\Altcha\Rules\ValidAltcha;
+use App\Rules\ValidCaptcha;
 use Illuminate\Auth\Events\Registered;
 use Illuminate\Http\RedirectResponse;
 use Illuminate\Http\Request;
@@ -25,7 +25,7 @@ class RegisteredUserController extends Controller
             'name' => ['required', 'string', 'max:255'],
             'email' => ['required', 'string', 'lowercase', 'email', 'max:255', 'unique:'.User::class],
             'password' => ['required', 'confirmed', Rules\Password::defaults()],
-            'altcha' => ['required', new ValidAltcha],
+            'altcha' => ['required', new ValidCaptcha],
         ]);
 
         $user = User::create([

app/Http/Controllers/ContactController.php

@@ -3,7 +3,7 @@
 namespace App\Http\Controllers;
 
 use App\Models\Contact;
-use GrantHolle\Altcha\Rules\ValidAltcha;
+use App\Rules\ValidCaptcha;
 use Illuminate\Http\Request;
 
 class ContactController extends Controller
@@ -26,7 +26,7 @@ class ContactController extends Controller
             'email' => 'required|max:50',
             'message' => 'required|max:1000',
             'subject' => 'required|max:50',
-            'altcha' => ['required', new ValidAltcha],
+            'altcha' => ['required', new ValidCaptcha],
         ]);
 
         $contact = new Contact;

app/Http/Requests/Auth/LoginRequest.php

@@ -2,7 +2,7 @@
 
 namespace App\Http\Requests\Auth;
 
-use GrantHolle\Altcha\Rules\ValidAltcha;
+use App\Rules\ValidCaptcha;
 use Illuminate\Auth\Events\Lockout;
 use Illuminate\Foundation\Http\FormRequest;
 use Illuminate\Support\Facades\Auth;
@@ -30,7 +30,7 @@ class LoginRequest extends FormRequest
         return [
             'email' => ['required', 'string', 'email'],
             'password' => ['required', 'string'],
-            'altcha' => ['required', new ValidAltcha],
+            'altcha' => ['required', new ValidCaptcha],
         ];
     }