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// Copyright (C) 2021 The Qt Company Ltd.
// Copyright (C) 2019 Luxoft Sweden AB
// Copyright (C) 2018 Pelagicore AG
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include <QFileInfo>
#include <QDataStream>
#include <QCryptographicHash>
#include <QByteArray>
#include <QString>
#include <archive.h>
#include "packageutilities.h"
#include "packageutilities_p.h"
#include "global.h"
#include "logging.h"
#include <clocale>
QT_BEGIN_NAMESPACE_AM
bool PackageUtilities::ensureCorrectLocale(QStringList *warnings)
{
Q_UNUSED(warnings)
return ensureCorrectLocale();
}
bool PackageUtilities::ensureCorrectLocale()
{
static bool once = false;
if (once)
return true;
once = true;
// We need to make sure we are running in a Unicode locale, since we are
// running into problems when unpacking packages with libarchive that
// contain non-ASCII characters.
// This has to be done *before* the QApplication constructor to avoid
// the initialization of the text codecs.
#if defined(Q_OS_WIN)
// Windows is UTF16
return true;
#else
// check if umlaut-a converts correctly
auto checkUtf = []() -> bool {
const wchar_t umlaut_w[2] = { 0x00e4, 0x0000 };
char umlaut_mb[2];
size_t umlaut_mb_len = wcstombs(umlaut_mb, umlaut_w, sizeof(umlaut_mb));
return (umlaut_mb_len == 2 && umlaut_mb[0] == '\xc3' && umlaut_mb[1] == '\xa4');
};
// init locales from env variables
setlocale(LC_ALL, "");
// check if this is enough to have an UTF-8 locale
if (checkUtf())
return true;
qCWarning(LogDeployment) << "The current locale is not UTF-8 capable. Trying to find a capable one now, "
"but this is time consuming and should be avoided";
// LC_ALL trumps all the rest, so if this is not specifying an UTF-8 locale, we need to unset it
QByteArray lc_all = qgetenv("LC_ALL");
if (!lc_all.isEmpty() && !(lc_all.endsWith(".UTF-8") || lc_all.endsWith(".UTF_8"))) {
unsetenv("LC_ALL");
setlocale(LC_ALL, "");
}
// check again
if (checkUtf())
return true;
// now the time-consuming part: trying to switch to a well-known UTF-8 locale
const char *locales[] = {
#if defined(Q_OS_MACOS) || defined(Q_OS_IOS)
"UTF-8"
#else
"C.UTF-8", "en_US.UTF-8"
#endif
};
for (const char *loc : locales) {
if (const char *old = setlocale(LC_CTYPE, loc)) {
if (checkUtf()) {
if (setenv("LC_CTYPE", loc, 1) == 0)
return true;
}
setlocale(LC_CTYPE, old);
}
}
return false;
#endif
}
bool PackageUtilities::checkCorrectLocale()
{
// see ensureCorrectLocale() above. Call this after the QApplication
// constructor as a sanity check.
#if defined(Q_OS_WIN)
return true;
#else
// check if umlaut-a converts correctly
return QString::fromUtf8("\xc3\xa4").toLocal8Bit() == "\xc3\xa4";
#endif
}
ArchiveException::ArchiveException(struct ::archive *ar, const char *errorString)
: Exception(Error::Archive, qSL("[libarchive] ") + qL1S(errorString) + qSL(": ") + QString::fromLocal8Bit(::archive_error_string(ar)))
{ }
QVariantMap PackageUtilities::headerDataForDigest = QVariantMap {
{ qSL("extraSigned"), QVariantMap() }
};
void PackageUtilities::addFileMetadataToDigest(const QString &entryFilePath, const QFileInfo &fi, QCryptographicHash &digest)
{
// (using QDataStream would be more readable, but it would make the algorithm Qt dependent)
QByteArray addToDigest = ((fi.isDir()) ? "D/" : "F/")
+ QByteArray::number(fi.isDir() ? 0 : fi.size())
+ '/' + entryFilePath.toUtf8();
digest.addData(addToDigest);
}
void PackageUtilities::addHeaderDataToDigest(const QVariantMap &header, QCryptographicHash &digest) Q_DECL_NOEXCEPT_EXPR(false)
{
for (auto it = headerDataForDigest.constBegin(); it != headerDataForDigest.constEnd(); ++it) {
if (header.contains(it.key())) {
QByteArray ba;
QDataStream ds(&ba, QDataStream::WriteOnly);
QVariant v = header.value(it.key());
if (!v.convert(it.value().metaType()))
throw Exception(Error::Package, "metadata field %1 has invalid type for digest calculation (cannot convert %2 to %3)")
.arg(it.key()).arg(header.value(it.key()).metaType().name()).arg(it.value().metaType().name());
ds << v;
digest.addData(ba);
}
}
}
QT_END_NAMESPACE_AM
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