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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Copyright (C) 2015 ownCloud Inc
** 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.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtNetwork/private/qtlsbackend_p.h>
#include <QtNetwork/qsslcertificate.h>
#include <QtCore/qglobal.h>
#include <QtCore/qdebug.h>
#ifdef Q_OS_MACOS
#include <QtCore/private/qcore_mac_p.h>
#include <CoreFoundation/CFArray.h>
#include <Security/Security.h>
#endif // Q_OS_MACOS
QT_BEGIN_NAMESPACE
Q_DECLARE_LOGGING_CATEGORY(lcTlsBackend)
#ifdef Q_OS_MACOS
namespace {
bool hasTrustedSslServerPolicy(SecPolicyRef policy, CFDictionaryRef props) {
QCFType<CFDictionaryRef> policyProps = SecPolicyCopyProperties(policy);
// only accept certificates with policies for SSL server validation for now
if (CFEqual(CFDictionaryGetValue(policyProps, kSecPolicyOid), kSecPolicyAppleSSL)) {
CFBooleanRef policyClient;
if (CFDictionaryGetValueIfPresent(policyProps, kSecPolicyClient, reinterpret_cast<const void**>(&policyClient)) &&
CFEqual(policyClient, kCFBooleanTrue)) {
return false; // no client certs
}
if (!CFDictionaryContainsKey(props, kSecTrustSettingsResult)) {
// as per the docs, no trust settings result implies full trust
return true;
}
CFNumberRef number = static_cast<CFNumberRef>(CFDictionaryGetValue(props, kSecTrustSettingsResult));
SecTrustSettingsResult settingsResult;
CFNumberGetValue(number, kCFNumberSInt32Type, &settingsResult);
switch (settingsResult) {
case kSecTrustSettingsResultTrustRoot:
case kSecTrustSettingsResultTrustAsRoot:
return true;
default:
return false;
}
}
return false;
}
bool isCaCertificateTrusted(SecCertificateRef cfCert, int domain)
{
QCFType<CFArrayRef> cfTrustSettings;
OSStatus status = SecTrustSettingsCopyTrustSettings(cfCert, SecTrustSettingsDomain(domain), &cfTrustSettings);
if (status == noErr) {
CFIndex size = CFArrayGetCount(cfTrustSettings);
// if empty, trust for everything (as per the Security Framework documentation)
if (size == 0) {
return true;
} else {
for (CFIndex i = 0; i < size; ++i) {
CFDictionaryRef props = static_cast<CFDictionaryRef>(CFArrayGetValueAtIndex(cfTrustSettings, i));
if (CFDictionaryContainsKey(props, kSecTrustSettingsPolicy)) {
if (hasTrustedSslServerPolicy((SecPolicyRef)CFDictionaryGetValue(props, kSecTrustSettingsPolicy), props))
return true;
}
}
}
} else {
qCWarning(lcTlsBackend, "Error receiving trust for a CA certificate");
}
return false;
}
} // unnamed namespace
#endif // Q_OS_MACOS
namespace QTlsPrivate {
QList<QSslCertificate> systemCaCertificates()
{
QList<QSslCertificate> systemCerts;
// SecTrustSettingsCopyCertificates is not defined on iOS.
#ifdef Q_OS_MACOS
// iterate through all enum members, order:
// kSecTrustSettingsDomainUser, kSecTrustSettingsDomainAdmin, kSecTrustSettingsDomainSystem
for (int dom = kSecTrustSettingsDomainUser; dom <= int(kSecTrustSettingsDomainSystem); dom++) {
QCFType<CFArrayRef> cfCerts;
OSStatus status = SecTrustSettingsCopyCertificates(SecTrustSettingsDomain(dom), &cfCerts);
if (status == noErr) {
const CFIndex size = CFArrayGetCount(cfCerts);
for (CFIndex i = 0; i < size; ++i) {
SecCertificateRef cfCert = (SecCertificateRef)CFArrayGetValueAtIndex(cfCerts, i);
QCFType<CFDataRef> derData = SecCertificateCopyData(cfCert);
if (isCaCertificateTrusted(cfCert, dom)) {
if (derData == nullptr) {
qCWarning(lcTlsBackend, "Error retrieving a CA certificate from the system store");
} else {
systemCerts << QSslCertificate(QByteArray::fromCFData(derData), QSsl::Der);
}
}
}
}
}
#endif
return systemCerts;
}
} // namespace QTlsPrivate
QT_END_NAMESPACE
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