Add back API (#80)

Re-implements the API after it was removed in the Laravel 5.3 upgrade.

app/Http/Middleware/APISecretToken.php

@@ -0,0 +1,122 @@
+<?php
+/**
+ * Pterodactyl - Panel
+ * Copyright (c) 2015 - 2016 Dane Everitt <dane@daneeveritt.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+namespace Pterodactyl\Http\Middleware;
+
+use Crypt;
+use IPTools\IP;
+use IPTools\Range;
+
+use Pterodactyl\Models\APIKey;
+use Pterodactyl\Models\APIPermission;
+
+use Illuminate\Http\Request;
+use Dingo\Api\Routing\Route;
+use Dingo\Api\Auth\Provider\Authorization;
+
+use Symfony\Component\HttpKernel\Exception\BadRequestHttpException; // 400
+use Symfony\Component\HttpKernel\Exception\UnauthorizedHttpException; // 401
+use Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException; // 403
+use Symfony\Component\HttpKernel\Exception\HttpException; //500
+
+class APISecretToken extends Authorization
+{
+
+    protected $algo = 'sha256';
+
+    protected $permissionAllowed = false;
+
+    protected $url = '';
+
+    public function __construct()
+    {
+        //
+    }
+
+    public function getAuthorizationMethod()
+    {
+        return 'Authorization';
+    }
+
+    public function authenticate(Request $request, Route $route)
+    {
+        if (!$request->bearerToken() || empty($request->bearerToken())) {
+            throw new UnauthorizedHttpException('The authentication header was missing or malformed');
+        }
+
+        list($public, $hashed) = explode('.', $request->bearerToken());
+
+        $key = APIKey::where('public', $public)->first();
+        if (!$key) {
+            throw new AccessDeniedHttpException('Invalid API Key.');
+        }
+
+        // Check for Resource Permissions
+        if (!empty($request->route()->getName())) {
+            if(!is_null($key->allowed_ips)) {
+                $inRange = false;
+                foreach(json_decode($key->allowed_ips) as $ip) {
+                    if (Range::parse($ip)->contains(new IP($request->ip()))) {
+                        $inRange = true;
+                        break;
+                    }
+                }
+                if (!$inRange) {
+                    throw new AccessDeniedHttpException('This IP address <' . $request->ip() . '> does not have permission to use this API key.');
+                }
+            }
+
+            foreach(APIPermission::where('key_id', $key->id)->get() as &$row) {
+                if ($row->permission === '*' || $row->permission === $request->route()->getName()) {
+                    $this->permissionAllowed = true;
+                    continue;
+                }
+            }
+
+            if (!$this->permissionAllowed) {
+                throw new AccessDeniedHttpException('You do not have permission to access this resource.');
+            }
+        }
+
+        try {
+            $decrypted = Crypt::decrypt($key->secret);
+        } catch (\Illuminate\Contracts\Encryption\DecryptException $ex) {
+            throw new HttpException('There was an error while attempting to check your secret key.');
+        }
+
+        $this->url = urldecode($request->fullUrl());
+        if($this->_generateHMAC($request->getContent(), $decrypted) !== base64_decode($hashed)) {
+            throw new BadRequestHttpException('The hashed body was not valid. Potential modification of contents in route.');
+        }
+
+        return true;
+
+    }
+
+    protected function _generateHMAC($body, $key)
+    {
+        $data = $this->url . $body;
+        return hash_hmac($this->algo, $data, $key, true);
+    }
+
+}