Added 2fa code validation

app/Validation/FireflyValidator.php

@@ -16,10 +16,13 @@ use FireflyIII\Models\TransactionType;
 use FireflyIII\Repositories\Budget\BudgetRepositoryInterface;
 use FireflyIII\Rules\Triggers\TriggerInterface;
 use FireflyIII\User;
+use Input;
 use Illuminate\Contracts\Encryption\DecryptException;
 use Illuminate\Validation\Validator;
 use Log;
+use PragmaRX\Google2FA\Contracts\Google2FA;
 use Symfony\Component\Translation\TranslatorInterface;
+use Session;
 
 /**
  * Class FireflyValidator
@@ -43,6 +46,29 @@ class FireflyValidator extends Validator
         parent::__construct($translator, $data, $rules, $messages, $customAttributes);
     }
 
+    /**
+     * @param $attribute
+     * @param $value
+     * @param $parameters
+     *
+     * @SuppressWarnings(PHPMD.UnusedFormalParameter)
+     *
+     * @return bool
+     */
+    public function validate2faCode($attribute, $value, $parameters): bool
+    {
+        if (!is_string($value) || is_null($value) || strlen($value) <> 6) {
+            return false;
+        }        
+
+        // Retrieve the secret from our hidden form field.
+        $secret = Input::get($parameters[0]);
+
+        $google2fa = app('PragmaRX\Google2FA\Google2FA');
+        
+        return $google2fa->verifyKey($secret, $value);
+    }
+
     /**
      * @param $attribute
      * @param $value