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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include <qglobal.h>
#include <QtNetwork/private/qtnetworkglobal_p.h>
#if QT_CONFIG(topleveldomain)
#include "QtCore/qfile.h"
#include "QtCore/qloggingcategory.h"
#include "QtCore/qstandardpaths.h"
#include "QtCore/qstring.h"
#if !QT_CONFIG(publicsuffix_qt) && !QT_CONFIG(publicsuffix_system)
# error Enable at least one feature: publicsuffix-qt, publicsuffix-system
#endif
#if QT_CONFIG(publicsuffix_qt)
# include "psl_data.cpp"
#endif
// Defined in src/3rdparty/libpsl/src/lookup_string_in_fixed_set.c
extern "C" int LookupStringInFixedSet(const unsigned char *graph, std::size_t length,
const char *key, std::size_t key_length);
QT_BEGIN_NAMESPACE
using namespace Qt::StringLiterals;
Q_LOGGING_CATEGORY(lcTld, "qt.network.tld")
static constexpr int PSL_NOT_FOUND = -1;
static constexpr int PSL_FLAG_EXCEPTION = 1 << 0;
static constexpr int PSL_FLAG_WILDCARD = 1 << 1;
class QPublicSuffixDatabase final
{
public:
#if QT_CONFIG(publicsuffix_system)
QPublicSuffixDatabase();
#endif // QT_CONFIG(publicsuffix_system)
int lookupDomain(QByteArrayView domain) const;
private:
QByteArrayView m_data
#if QT_CONFIG(publicsuffix_qt)
{
kDafsa, sizeof(kDafsa)
}
#endif // QT_CONFIG(publicsuffix_qt)
;
#if QT_CONFIG(publicsuffix_system)
std::unique_ptr<QFile> m_dev;
QByteArray m_storage;
bool loadFile(const QString &fileName);
#endif // QT_CONFIG(publicsuffix_system)
};
int QPublicSuffixDatabase::lookupDomain(QByteArrayView domain) const
{
return LookupStringInFixedSet(reinterpret_cast<const unsigned char *>(m_data.constData()),
m_data.size(), domain.data(), domain.size());
}
#if QT_CONFIG(publicsuffix_system)
static QStringList locatePublicSuffixFiles()
{
return QStandardPaths::locateAll(QStandardPaths::GenericDataLocation,
u"publicsuffix/public_suffix_list.dafsa"_s);
}
QPublicSuffixDatabase::QPublicSuffixDatabase()
{
for (auto &&fileName : locatePublicSuffixFiles()) {
if (loadFile(fileName))
return;
}
#if QT_CONFIG(publicsuffix_qt)
qCDebug(lcTld, "Using builtin publicsuffix list");
#else
qCWarning(lcTld, "No usable publicsuffix file found");
#endif
}
bool QPublicSuffixDatabase::loadFile(const QString &fileName)
{
static const QByteArrayView DafsaFileHeader = ".DAFSA@PSL_0 \n";
qCDebug(lcTld, "Loading publicsuffix file: %s", qUtf8Printable(fileName));
auto systemFile = std::make_unique<QFile>(fileName);
if (!systemFile->open(QIODevice::ReadOnly)) {
qCDebug(lcTld, "Failed to open publicsuffix file: %s",
qUtf8Printable(systemFile->errorString()));
return false;
}
auto fileSize = systemFile->size();
// Check if there is enough data for header, version byte and some data
if (fileSize < DafsaFileHeader.size() + 2) {
qCWarning(lcTld, "publicsuffix file is too small: %zu", std::size_t(fileSize));
return false;
}
auto header = systemFile->read(DafsaFileHeader.size());
if (header != DafsaFileHeader) {
qCWarning(lcTld, "Invalid publicsuffix file header: %s", header.toHex().constData());
return false;
}
// Check if the file is UTF-8 compatible
if (!systemFile->seek(fileSize - 1)) {
qCWarning(lcTld, "Failed to seek to the end of file: %s",
qUtf8Printable(systemFile->errorString()));
return false;
}
char version;
if (systemFile->read(&version, 1) != 1) {
qCWarning(lcTld, "Failed to read publicsuffix version");
return false;
}
if (version != 0x01) {
qCWarning(lcTld, "Unsupported publicsuffix version: %d", int(version));
return false;
}
const auto dataSize = fileSize - DafsaFileHeader.size() - 1;
// Try to map the file first
auto mappedData = systemFile->map(DafsaFileHeader.size(), dataSize);
if (mappedData) {
qCDebug(lcTld, "Using mapped system publicsuffix data");
systemFile->close();
m_data = QByteArrayView(mappedData, dataSize);
m_dev = std::move(systemFile);
return true;
}
qCDebug(lcTld, "Failed to map publicsuffix file: %s",
qUtf8Printable(systemFile->errorString()));
systemFile->seek(DafsaFileHeader.size());
m_storage = systemFile->read(dataSize);
if (m_storage.size() != dataSize) {
qCWarning(lcTld, "Failed to read publicsuffix file");
m_storage.clear();
return false;
}
qCDebug(lcTld, "Using system publicsuffix data");
m_data = m_storage;
return true;
}
Q_GLOBAL_STATIC(QPublicSuffixDatabase, publicSuffix);
#else
static const QPublicSuffixDatabase m_publicSuffix;
#endif // QT_CONFIG(publicsuffix_system)
/*!
\internal
Return true if \a domain is a top-level-domain per Qt's copy of the Mozilla public suffix list.
The \a domain must be in lower-case format (as per QString::toLower()).
*/
Q_NETWORK_EXPORT bool qIsEffectiveTLD(QStringView domain)
{
// for domain 'foo.bar.com':
// 1. return false if TLD table contains '!foo.bar.com'
// 2. return true if TLD table contains 'foo.bar.com'
// 3. return true if the table contains '*.bar.com'
QByteArray decodedDomain = domain.toUtf8();
QByteArrayView domainView(decodedDomain);
#if QT_CONFIG(publicsuffix_system)
if (publicSuffix.isDestroyed())
return false;
#else
auto publicSuffix = &m_publicSuffix;
#endif // QT_CONFIG(publicsuffix_system)
auto ret = publicSuffix->lookupDomain(domainView);
if (ret != PSL_NOT_FOUND) {
if (ret & PSL_FLAG_EXCEPTION) // 1
return false;
if ((ret & PSL_FLAG_WILDCARD) == 0) // 2
return true;
}
const auto dot = domainView.indexOf('.');
if (dot < 0) // Actual TLD: may be effective if the subject of a wildcard rule:
return ret != PSL_NOT_FOUND;
ret = publicSuffix->lookupDomain(domainView.sliced(dot + 1)); // 3
if (ret == PSL_NOT_FOUND)
return false;
return (ret & PSL_FLAG_WILDCARD) != 0;
}
QT_END_NAMESPACE
#endif // QT_CONFIG(topleveldomain)
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