Hsts: match header names case insensitively

Header field names are always considered to be case-insensitive.

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>
(cherry picked from commit 1b736a815be0222f4b24289cf17575fc15707305)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

2 files changed, 8 insertions, 2 deletions

diff --git a/src/network/access/qhsts.cpp b/src/network/access/qhsts.cpp
index 39905f3548..82deede172 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 252f5e8f57..97a2d2889e 100644
--- a/tests/auto/network/access/hsts/tst_qhsts.cpp
+++ b/tests/auto/network/access/hsts/tst_qhsts.cpp
@@ -217,6 +217,12 @@ void tst_QHsts::testSTSHeaderParser()
     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));