From 12a9a45747f3ce3ff58464cd7ccb88f2c42438e8 Mon Sep 17 00:00:00 2001
From: benrubson <6764151+benrubson@users.noreply.github.com>
Date: Sun, 9 Feb 2020 10:01:33 +0100
Subject: [PATCH] Log failed accesses

---
 app/Http/Controllers/Auth/LoginController.php | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/app/Http/Controllers/Auth/LoginController.php b/app/Http/Controllers/Auth/LoginController.php
index ea584a3b6..75ade74e7 100644
--- a/app/Http/Controllers/Auth/LoginController.php
+++ b/app/Http/Controllers/Auth/LoginController.php
@@ -101,6 +101,9 @@ class LoginController extends Controller
             $this->hasTooManyLoginAttempts($request)) {
             $this->fireLockoutEvent($request);
 
+            // Also log some error message
+            $this->logFailedAccess($request);
+
             return $this->sendLockoutResponse($request);
         }
 
@@ -117,6 +120,9 @@ class LoginController extends Controller
         // user surpasses their maximum number of attempts they will get locked out.
         $this->incrementLoginAttempts($request);
 
+        // Also log some error message
+        $this->logFailedAccess($request);
+
         return $this->sendFailedLoginResponse($request);
     }
 
@@ -162,4 +168,16 @@ class LoginController extends Controller
         return redirect('/login');
     }
 
+    /**
+     * Log failed accesses, matching the default fail2ban nginx/apache auth rules.
+     */
+    protected function logFailedAccess(Request $request)
+    {
+        if (isset($_SERVER['SERVER_SOFTWARE']) && preg_match('/nginx/i', $_SERVER['SERVER_SOFTWARE'])) {
+             error_log('user "' . $request->get($this->username()) . '" was not found in "BookStack"', 4);
+         } else {
+             error_log('user "' . $request->get($this->username()) . '" authentication failure for "BookStack"', 4);
+         }
+    }
+
 }