commit 1b736a815be0222f4b24289cf17575fc15707305
Author: Mårten Nordheim <marten.nordheim@qt.io>
Date:   Fri May 5 11:07:26 2023 +0200

    Hsts: match header names case insensitively
    
    Header field names are always considered to be case-insensitive.
    
    Pick-to: 6.5 6.5.1 6.2 5.15
    Fixes: QTBUG-113392
    Change-Id: Ifb4def4bb7f2ac070416cdc76581a769f1e52b43
    Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
    Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
    Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>

Index: qtbase-opensource-src-5.15.2+dfsg/src/network/access/qhsts.cpp
===================================================================
--- qtbase-opensource-src-5.15.2+dfsg.orig/src/network/access/qhsts.cpp	2024-03-05 13:48:37.054356050 +0100
+++ qtbase-opensource-src-5.15.2+dfsg/src/network/access/qhsts.cpp	2024-03-05 13:48:37.054356050 +0100
@@ -364,8 +364,8 @@
 bool QHstsHeaderParser::parse(const QList<QPair<QByteArray, QByteArray>> &headers)
 {
     for (const auto &h : headers) {
-        // We use '==' since header name was already 'trimmed' for us:
-        if (h.first == "Strict-Transport-Security") {
+        // We compare directly because header name was already 'trimmed' for us:
+        if (h.first.compare("Strict-Transport-Security", Qt::CaseInsensitive) == 0) {
             header = h.second;
             // RFC6797, 8.1:
             //
Index: qtbase-opensource-src-5.15.2+dfsg/tests/auto/network/access/hsts/tst_qhsts.cpp
===================================================================
--- qtbase-opensource-src-5.15.2+dfsg.orig/tests/auto/network/access/hsts/tst_qhsts.cpp	2024-03-05 13:48:37.054356050 +0100
+++ qtbase-opensource-src-5.15.2+dfsg/tests/auto/network/access/hsts/tst_qhsts.cpp	2024-03-05 13:48:37.054356050 +0100
@@ -242,6 +242,12 @@
     QVERIFY(parser.includeSubDomains());
 
     list.pop_back();
+    list << Header("strict-transport-security", "includeSubDomains;max-age=1000");
+    QVERIFY(parser.parse(list));
+    QVERIFY(parser.expirationDate() > QDateTime::currentDateTimeUtc());
+    QVERIFY(parser.includeSubDomains());
+
+    list.pop_back();
     // Invalid (includeSubDomains twice):
     list << Header("Strict-Transport-Security", "max-age = 1000 ; includeSubDomains;includeSubDomains");
     QVERIFY(!parser.parse(list));