From 91e1161a58b18ebdc9584818013e83a67ab2e5b4 Mon Sep 17 00:00:00 2001
From: ZhuangYumin <zhuangyumin@sjtu.edu.cn>
Date: Thu, 14 Dec 2023 07:46:48 +0000
Subject: [PATCH] =?UTF-8?q?=E9=AB=98=E6=9D=83=E9=99=90=E5=AF=86=E7=A0=81?=
 =?UTF-8?q?=E9=94=99=E8=AF=AF=E4=B8=8D=E8=B1=81=E5=85=8D?=
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---
 backend/src/engine.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/backend/src/engine.cpp b/backend/src/engine.cpp
index 8512d0c..414afb2 100644
--- a/backend/src/engine.cpp
+++ b/backend/src/engine.cpp
@@ -127,6 +127,8 @@ std::vector<std::string> BookStoreEngineClass::ExecuteSu(
   if (login_stack.size() > 0 &&
       user_data_base.GetPrevilege(login_stack.top().first) >
           user_data_base.GetPrevilege(user_id)) {
+    if (password != "" && !user_data_base.PAM(user_id, password))
+      return std::vector<std::string>({"Invalid"});
     // debugPrint("has root previlege");
     login_stack.push(std::make_pair(user_id, 0));
     login_count[user_id]++;