Feature 'ocsp' - fix a broken win-64 build

Alas, we have to do the job ossl_typ.h failed to - undef macros
coming from wincrypt.h (?) and clashing with identifiers/naming
conventions not exactly very wisely chosen by OpenSSL.

Change-Id: I1725c4f769be64dbb391d040b2c1574b20b65151
Fixes: QTBUG-73322
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>

src/network/ssl/qocsp_p.h

@@ -0,0 +1,74 @@
+/****************************************************************************
+**
+** Copyright (C) 2019 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtNetwork module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QOCSP_P_H
+#define QOCSP_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API. It exists purely as an
+// implementation detail. This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+// Note, this file is a workaround: on 64-bit Windows one of OpenSSL
+// includes combined with openssl/ocsp.h results in macros from
+// wincrypt.h exposed. OpenSSL's own very "unique" and "inventive"
+// names like OCSP_RESPONSE or X509_NAME were asking to clash with
+// other entities (presumably macros) with the same names. Normally,
+// ossl_typ.h un-defines them, but due to a bug in OpenSSL, fails
+// to do this on Win 64. Thus we have to do it here. We only undef
+// 3 names, ossl_typ.h has more, but apparently we don't need them
+// (no name clash so far).
+
+QT_REQUIRE_CONFIG(ocsp);
+
+#ifdef Q_OS_WIN64
+#undef X509_NAME
+#undef OCSP_REQUEST
+#undef OCSP_RESPONSE
+#endif // Q_OS_WIN64
+
+#include <openssl/ocsp.h>
+
+#endif // QOCSP_P_H

src/network/ssl/qsslsocket_openssl.cpp

@@ -85,7 +85,7 @@
 #include <QtCore/qscopedvaluerollback.h>
 
 #if QT_CONFIG(ocsp)
-#include <openssl/ocsp.h>
+#include "qocsp_p.h"
 #endif
 
 #include <algorithm>

src/network/ssl/qsslsocket_openssl_symbols_p.h

@@ -73,7 +73,7 @@
 #include <QtCore/qglobal.h>
 
 #if QT_CONFIG(ocsp)
-#include <openssl/ocsp.h>
+#include "qocsp_p.h"
 #endif
 
 QT_BEGIN_NAMESPACE

src/network/ssl/ssl.pri

@@ -100,6 +100,8 @@ qtConfig(ssl) {
             SOURCES += ssl/qdtls_openssl.cpp
         }
 
+        qtConfig(ocsp): HEADERS += ssl/qocsp_p.h
+
         qtConfig(opensslv11) {
             HEADERS += ssl/qsslsocket_openssl11_symbols_p.h
             SOURCES += ssl/qsslsocket_openssl11.cpp \