From 1b736a815be0222f4b24289cf17575fc15707305 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?M=C3=A5rten=20Nordheim?= <marten.nordheim@qt.io>
Date: Fri, 5 May 2023 11:07:26 +0200
Subject: [PATCH] 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>
---
 src/network/access/qhsts.cpp                 | 4 ++--
 tests/auto/network/access/hsts/tst_qhsts.cpp | 6 ++++++
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/network/access/qhsts.cpp b/src/network/access/qhsts.cpp
index 39905f354807..82deede17298 100644
--- a/src/network/access/qhsts.cpp
+++ b/src/network/access/qhsts.cpp
@@ -327,8 +327,8 @@ quoted-pair    = "\" CHAR
 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:
             //
diff --git a/tests/auto/network/access/hsts/tst_qhsts.cpp b/tests/auto/network/access/hsts/tst_qhsts.cpp
index 252f5e8f5792..97a2d2889e57 100644
--- a/tests/auto/network/access/hsts/tst_qhsts.cpp
+++ b/tests/auto/network/access/hsts/tst_qhsts.cpp
@@ -216,6 +216,12 @@ void tst_QHsts::testSTSHeaderParser()
     QVERIFY(parser.expirationDate() > QDateTime::currentDateTimeUtc());
     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");
