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/****************************************************************************
**
** Copyright (C) 2018 Pelagicore AG
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Pelagicore Application Manager.
**
** $QT_BEGIN_LICENSE:LGPL-QTAS$
** Commercial License Usage
** Licensees holding valid commercial Qt Automotive Suite 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.
**
** $QT_END_LICENSE$
**
** SPDX-License-Identifier: LGPL-3.0
**
****************************************************************************/
#include <QMutex>
#include "global.h"
#include "cryptography.h"
#if defined(Q_OS_UNIX)
# include <QFile>
#elif defined(Q_OS_WIN)
// all this mess is needed to get RtlGenRandom()
# include "windows.h"
# define SystemFunction036 NTAPI SystemFunction036
# include "ntsecapi.h"
# undef SystemFunction036
#endif
#if defined(Q_OS_MACOS) || defined(Q_OS_IOS)
# include <QtCore/private/qcore_mac_p.h>
# include <Security/SecBase.h>
# include <Availability.h>
#endif
#if defined(AM_USE_LIBCRYPTO)
# include "libcryptofunction.h"
QT_BEGIN_NAMESPACE_AM
Q_GLOBAL_STATIC(QMutex, initMutex)
// clazy:excludeall=non-pod-global-static
static AM_LIBCRYPTO_FUNCTION(ERR_error_string_n, void(*)(unsigned long, char *, size_t));
QT_END_NAMESPACE_AM
#endif
QT_BEGIN_NAMESPACE_AM
QByteArray Cryptography::generateRandomBytes(int size)
{
QByteArray result;
if (size > 0) {
#if defined(Q_OS_UNIX)
QFile f(qSL("/dev/urandom"));
if (f.open(QIODevice::ReadOnly)) {
result = f.read(size);
if (result.size() != size)
result.clear();
}
#elif defined(Q_OS_WIN)
result.resize(size);
if (!RtlGenRandom(result.data(), size))
result.clear();
#endif
}
return result;
}
void Cryptography::initialize()
{
#if defined(AM_USE_LIBCRYPTO)
static bool openSslInitialized = false;
QMutexLocker locker(initMutex());
if (!openSslInitialized) {
if (!LibCryptoFunctionBase::initialize())
qFatal("Could not load libcrypto");
openSslInitialized = true;
}
#endif
}
QString Cryptography::errorString(qint64 osCryptoError, const char *errorDescription)
{
QString result;
if (errorDescription && *errorDescription) {
result = QString::fromLatin1(errorDescription);
result.append(QLatin1String(": "));
}
#if defined(AM_USE_LIBCRYPTO)
if (osCryptoError) {
char msg[512];
msg[sizeof(msg) - 1] = 0;
//void ERR_error_string_n(unsigned long e, char *buf, size_t len);
am_ERR_error_string_n((unsigned long) osCryptoError, msg, sizeof(msg) - 1);
result.append(QString::fromLocal8Bit(msg));
}
#elif defined(Q_OS_WIN)
if (osCryptoError) {
LPWSTR msg = nullptr;
FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
nullptr, osCryptoError, 0, (LPWSTR) &msg, 0, nullptr);
// remove potential \r\n at the end
result.append(QString::fromWCharArray(msg).trimmed());
HeapFree(GetProcessHeap(), 0, msg);
}
#elif defined(Q_OS_MACOS) || defined(Q_OS_IOS)
if (osCryptoError) {
# if QT_MACOS_IOS_PLATFORM_SDK_EQUAL_OR_ABOVE(100300, 110300)
if (__builtin_available(macOS 10.3, iOS 12.3, *)) {
QCFType<CFStringRef> msg = SecCopyErrorMessageString(qint32(osCryptoError), nullptr);
result.append(QString::fromCFString(msg));
}
# else
result.append(QString::number(osCryptoError));
# endif
}
#endif
return result;
}
QT_END_NAMESPACE_AM
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