From dd1a233859068abf8f295dc2c989c3f89a0ae1cf Mon Sep 17 00:00:00 2001
From: Jonathan White <support@dmapps.us>
Date: Mon, 27 May 2024 07:32:28 -0400
Subject: [PATCH] Fix force conversion of KDBX3 if using Quick Unlock

* Use SHA256 hash of the file path of the database to generate a UUID when using the KDBX3 format. This restores the original behavior of using the file path as the quick unlock lookup key.
---
 src/core/Database.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/core/Database.cpp b/src/core/Database.cpp
index c5156bbce..031955c1e 100644
--- a/src/core/Database.cpp
+++ b/src/core/Database.cpp
@@ -1041,6 +1041,13 @@ void Database::stopModifiedTimer()
 
 QUuid Database::publicUuid()
 {
+    // This feature requires KDBX4
+    if (m_data.formatVersion < KeePass2::FILE_VERSION_4) {
+        // Return the file path hash as a UUID for KDBX3
+        QCryptographicHash hasher(QCryptographicHash::Sha256);
+        hasher.addData(filePath().toUtf8());
+        return QUuid::fromRfc4122(hasher.result().left(16));
+    }
 
     if (!publicCustomData().contains("KPXC_PUBLIC_UUID")) {
         publicCustomData().insert("KPXC_PUBLIC_UUID", QUuid::createUuid().toRfc4122());