Add permissions checking to API middleware list

app/Http/Kernel.php

@@ -24,6 +24,7 @@ use Illuminate\Auth\Middleware\AuthenticateWithBasicAuth;
 use Pterodactyl\Http\Middleware\API\AuthenticateIPAccess;
 use Pterodactyl\Http\Middleware\Daemon\DaemonAuthenticate;
 use Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse;
+use Pterodactyl\Http\Middleware\API\HasPermissionToResource;
 use Pterodactyl\Http\Middleware\Server\AuthenticateAsSubuser;
 use Pterodactyl\Http\Middleware\Server\SubuserBelongsToServer;
 use Pterodactyl\Http\Middleware\RequireTwoFactorAuthentication;
@@ -95,6 +96,9 @@ class Kernel extends HttpKernel
         'bindings' => SubstituteBindings::class,
         'recaptcha' => VerifyReCaptcha::class,
 
+        // API specific middleware.
+        'api..user_level' => HasPermissionToResource::class,
+
         // Server specific middleware (used for authenticating access to resources)
         //
         // These are only used for individual server authentication, and not gloabl

app/Http/Middleware/API/HasPermissionToResource.php

@@ -0,0 +1,58 @@
+<?php
+
+namespace Pterodactyl\Http\Middleware\API;
+
+use Closure;
+use Illuminate\Http\Request;
+use Pterodactyl\Contracts\Repository\ApiKeyRepositoryInterface;
+use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
+use Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException;
+
+class HasPermissionToResource
+{
+    /**
+     * @var \Pterodactyl\Contracts\Repository\ApiKeyRepositoryInterface
+     */
+    private $repository;
+
+    /**
+     * HasPermissionToResource constructor.
+     *
+     * @param \Pterodactyl\Contracts\Repository\ApiKeyRepositoryInterface $repository
+     */
+    public function __construct(ApiKeyRepositoryInterface $repository)
+    {
+        $this->repository = $repository;
+    }
+
+    /**
+     * Determine if an API key has permission to access the given route.
+     *
+     * @param \Illuminate\Http\Request $request
+     * @param \Closure                 $next
+     * @param string                   $role
+     * @return mixed
+     */
+    public function handle(Request $request, Closure $next, string $role = 'admin')
+    {
+        /** @var \Pterodactyl\Models\APIKey $model */
+        $model = $request->attributes->get('api_key');
+
+        if ($role === 'admin' && ! $request->user()->root_admin) {
+            throw new NotFoundHttpException;
+        }
+
+        $this->repository->loadPermissions($model);
+        $routeKey = str_replace(['api.', 'admin.'], '', $request->route()->getName());
+
+        $count = $model->getRelation('permissions')->filter(function ($permission) use ($routeKey) {
+            return $routeKey === str_replace('-', '.', $permission->permission);
+        })->count();
+
+        if ($count === 1) {
+            return $next($request);
+        }
+
+        throw new AccessDeniedHttpException('Cannot access resource without required `' . $routeKey . '` permission.');
+    }
+}

app/Http/Middleware/HMACAuthorization.php

@@ -1,209 +0,0 @@
-<?php
-/**
- * Pterodactyl - Panel
- * Copyright (c) 2015 - 2017 Dane Everitt <dane@daneeveritt.com>.
- *
- * This software is licensed under the terms of the MIT license.
- * https://opensource.org/licenses/MIT
- */
-
-namespace Pterodactyl\Http\Middleware;
-
-use Auth;
-use Crypt;
-use Config;
-use Closure;
-use Debugbar;
-use IPTools\IP;
-use IPTools\Range;
-use Illuminate\Http\Request;
-use Pterodactyl\Models\APIKey;
-use Symfony\Component\HttpKernel\Exception\BadRequestHttpException; // 400
-use Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException; // 403
-
-class HMACAuthorization
-{
-    /**
-     * The algorithm to use for handling HMAC encryption.
-     *
-     * @var string
-     */
-    const HMAC_ALGORITHM = 'sha256';
-
-    /**
-     * Stored values from the Authorization header.
-     *
-     * @var array
-     */
-    protected $token = [];
-
-    /**
-     * The eloquent model for the API key.
-     *
-     * @var \Pterodactyl\Models\APIKey
-     */
-    protected $key;
-
-    /**
-     * The illuminate request object.
-     *
-     * @var \Illuminate\Http\Request
-     */
-    private $request;
-
-    /**
-     * Construct class instance.
-     */
-    public function __construct()
-    {
-        Debugbar::disable();
-        Config::set('session.driver', 'array');
-    }
-
-    /**
-     * Handle an incoming request for the API.
-     *
-     * @param \Illuminate\Http\Request $request
-     * @param \Closure                 $next
-     * @return mixed
-     */
-    public function handle(Request $request, Closure $next)
-    {
-        $this->request = $request;
-
-        $this->checkBearer();
-        $this->validateRequest();
-        $this->validateIPAccess();
-        $this->validateContents();
-
-        Auth::loginUsingId($this->key()->user_id);
-
-        return $next($request);
-    }
-
-    /**
-     * Checks that the Bearer token is provided and in a valid format.
-     *
-     *
-     * @throws \Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException
-     */
-    protected function checkBearer()
-    {
-        if (empty($this->request()->bearerToken())) {
-            throw new BadRequestHttpException('Request was missing required Authorization header.');
-        }
-
-        $token = explode('.', $this->request()->bearerToken());
-        if (count($token) !== 2) {
-            throw new BadRequestHttpException('The Authorization header passed was not in a validate public/private key format.');
-        }
-
-        $this->token = [
-            'public' => $token[0],
-            'hash' => $token[1],
-        ];
-    }
-
-    /**
-     * Determine if the request contains a valid public API key
-     * as well as permissions for the resource.
-     *
-     *
-     * @throws \Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException
-     */
-    protected function validateRequest()
-    {
-        $this->key = APIKey::where('public', $this->public())->first();
-        if (! $this->key) {
-            throw new AccessDeniedHttpException('Unable to identify requester. Authorization token is invalid.');
-        }
-    }
-
-    /**
-     * Determine if the requesting IP address is allowed to use this API key.
-     *
-     * @return bool
-     *
-     * @throws \Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException
-     */
-    protected function validateIPAccess()
-    {
-        if (! is_null($this->key()->allowed_ips)) {
-            foreach (json_decode($this->key()->allowed_ips) as $ip) {
-                if (Range::parse($ip)->contains(new IP($this->request()->ip()))) {
-                    return true;
-                }
-            }
-
-            throw new AccessDeniedHttpException('This IP address does not have permission to access the API using these credentials.');
-        }
-
-        return true;
-    }
-
-    /**
-     * Determine if the HMAC sent in the request matches the one generated
-     * on the panel side.
-     *
-     *
-     * @throws \Symfony\Component\HttpKernel\Exception\BadRequestHttpException
-     */
-    protected function validateContents()
-    {
-        if (! hash_equals(base64_decode($this->hash()), $this->generateSignature())) {
-            throw new BadRequestHttpException('The HMAC for the request was invalid.');
-        }
-    }
-
-    /**
-     * Generate a HMAC from the request and known API secret key.
-     *
-     * @return string
-     */
-    protected function generateSignature()
-    {
-        $content = urldecode($this->request()->fullUrl()) . $this->request()->getContent();
-
-        return hash_hmac(self::HMAC_ALGORITHM, $content, Crypt::decrypt($this->key()->secret), true);
-    }
-
-    /**
-     * Return the public key passed in the Authorization header.
-     *
-     * @return string
-     */
-    protected function public()
-    {
-        return $this->token['public'];
-    }
-
-    /**
-     * Return the base64'd HMAC sent in the Authorization header.
-     *
-     * @return string
-     */
-    protected function hash()
-    {
-        return $this->token['hash'];
-    }
-
-    /**
-     * Return the API Key model.
-     *
-     * @return \Pterodactyl\Models\APIKey
-     */
-    protected function key()
-    {
-        return $this->key;
-    }
-
-    /**
-     * Return the Illuminate Request object.
-     *
-     * @return \Illuminate\Http\Request
-     */
-    private function request()
-    {
-        return $this->request;
-    }
-}