qgpgmenewcryptoconfig.cpp
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qgpgmenewcryptoconfig.cpp
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	/*
	qgpgmenewcryptoconfig.cpp

	This file is part of qgpgme, the Qt API binding for gpgme
	Copyright (c) 2010 Klarälvdalens Datakonsult AB
	Copyright (c) 2016 by Bundesamt für Sicherheit in der Informationstechnik
	Software engineering by Intevation GmbH

	QGpgME is free software; you can redistribute it and/or
	modify it under the terms of the GNU General Public License as
	published by the Free Software Foundation; either version 2 of the
	License, or (at your option) any later version.

	QGpgME is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with this program; if not, write to the Free Software
	Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

	In addition, as a special exception, the copyright holders give
	permission to link the code of this program with any edition of
	the Qt library by Trolltech AS, Norway (or with modified versions
	of Qt that use the same license as Qt), and distribute linked
	combinations including the two. You must obey the GNU General
	Public License in all respects for all of the code used other than
	Qt. If you modify this file, you may extend this exception to
	your version of the file, but you are not obligated to do so. If
	you do not wish to do so, delete this exception statement from
	your version.
	*/

	#ifdef HAVE_CONFIG_H
	#include "config.h"
	#endif

	#include "qgpgmenewcryptoconfig.h"

	#include <QDebug>
	#include "qgpgme_debug.h"

	#include <QFile>
	#include <QDir>
	#include <QList>

	#include "global.h"
	#include "error.h"
	#include "debug.h"

	#include <sstream>
	#include <string>
	#include <functional>
	#include <cassert>
	#include <functional>

	using namespace QGpgME;
	using namespace GpgME;
	using namespace GpgME::Configuration;

	namespace
	{
	struct Select1St {
	template <typename U, typename V>
	const U &operator()(const std::pair<U, V> &p) const
	{
	return p.first;
	}
	template <typename U, typename V>
	const U &operator()(const QPair<U, V> &p) const
	{
	return p.first;
	}
	};
	}

	// Just for the Q_ASSERT in the dtor. Not thread-safe, but who would
	// have 2 threads talking to gpgconf anyway? :)
	static bool s_duringClear = false;

	QGpgMENewCryptoConfig::QGpgMENewCryptoConfig()
	: m_parsed(false)
	{
	}

	QGpgMENewCryptoConfig::~QGpgMENewCryptoConfig()
	{
	clear();
	}

	void QGpgMENewCryptoConfig::reloadConfiguration(bool)
	{
	clear();

	Error error;
	const std::vector<Component> components = Component::load(error);
	#ifndef NDEBUG
	{
	std::stringstream ss;
	ss << "error: " << error
	<< "components:\n";
	std::copy(components.begin(), components.end(),
	std::ostream_iterator<Component>(ss, "\n"));
	qCDebug(QGPGME_CONFIG_LOADING_LOG) << ss.str().c_str();
	}
	#endif
	#if 0
	TODO port?
	if (error && showErrors) {
	const QString wmsg = i18n("<qt>Failed to execute gpgconf:<p>%1</p></qt>", QString::fromLocal8Bit(error.asString()));
	qCWarning(QGPGME_LOG) << wmsg; // to see it from test_cryptoconfig.cpp
	KMessageBox::error(0, wmsg);
	}
	#endif
	Q_FOREACH(const Component & c, components) {
	const std::shared_ptr<QGpgMENewCryptoConfigComponent> comp(new QGpgMENewCryptoConfigComponent);
	comp->setComponent(c);
	m_componentsByName[ comp->name() ] = comp;
	}
	m_parsed = true;
	}

	QStringList QGpgMENewCryptoConfig::componentList() const
	{
	if (!m_parsed) {
	const_cast<QGpgMENewCryptoConfig *>(this)->reloadConfiguration(true);
	}
	QStringList result;
	std::transform(m_componentsByName.begin(), m_componentsByName.end(),
	std::back_inserter(result),
	mem_fn(&QGpgMENewCryptoConfigComponent::name));
	return result;
	}

	QGpgMENewCryptoConfigComponent *QGpgMENewCryptoConfig::component(const QString &name) const
	{
	if (!m_parsed) {
	const_cast<QGpgMENewCryptoConfig *>(this)->reloadConfiguration(false);
	}
	return m_componentsByName.value(name).get();
	}

	void QGpgMENewCryptoConfig::sync(bool runtime)
	{
	Q_FOREACH(const std::shared_ptr<QGpgMENewCryptoConfigComponent> &c, m_componentsByName)
	c->sync(runtime);
	}

	void QGpgMENewCryptoConfig::clear()
	{
	s_duringClear = true;
	m_componentsByName.clear();
	s_duringClear = false;
	m_parsed = false; // next call to componentList/component will need to run gpgconf again
	}

	////

	QGpgMENewCryptoConfigComponent::QGpgMENewCryptoConfigComponent()
	: CryptoConfigComponent(),
	m_component()
	{

	}

	void QGpgMENewCryptoConfigComponent::setComponent(const Component &component)
	{
	m_component = component;
	m_groupsByName.clear();

	std::shared_ptr<QGpgMENewCryptoConfigGroup> group;

	const std::vector<Option> options = m_component.options();
	Q_FOREACH(const Option & o, options)
	if (o.flags() & Group) {
	if (group) {
	m_groupsByName[group->name()] = group;
	}
	group.reset(new QGpgMENewCryptoConfigGroup(shared_from_this(), o));
	} else if (group) {
	const std::shared_ptr<QGpgMENewCryptoConfigEntry> entry(new QGpgMENewCryptoConfigEntry(group, o));
	const QString name = entry->name();
	group->m_entryNames.push_back(name);
	group->m_entriesByName[name] = entry;
	} else {
	qCWarning(QGPGME_LOG) << "found no group for entry" << o.name() << "of component" << name();
	}
	if (group) {
	m_groupsByName[group->name()] = group;
	}

	}

	QGpgMENewCryptoConfigComponent::~QGpgMENewCryptoConfigComponent() {}

	QString QGpgMENewCryptoConfigComponent::name() const
	{
	return QString::fromUtf8(m_component.name());
	}

	QString QGpgMENewCryptoConfigComponent::description() const
	{
	return QString::fromUtf8(m_component.description());
	}

	QStringList QGpgMENewCryptoConfigComponent::groupList() const
	{
	QStringList result;
	result.reserve(m_groupsByName.size());
	std::transform(m_groupsByName.begin(), m_groupsByName.end(),
	std::back_inserter(result),
	std::mem_fn(&QGpgMENewCryptoConfigGroup::name));
	return result;
	}

	QGpgMENewCryptoConfigGroup *QGpgMENewCryptoConfigComponent::group(const QString &name) const
	{
	return m_groupsByName.value(name).get();
	}

	void QGpgMENewCryptoConfigComponent::sync(bool runtime)
	{
	Q_UNUSED(runtime) // runtime is always set by engine_gpgconf
	if (const Error err = m_component.save()) {
	qCWarning(QGPGME_LOG) << ":"
	<< "Error from gpgconf while saving configuration: %1"
	<< QString::fromLocal8Bit(err.asString());
	}
	}

	////

	QGpgMENewCryptoConfigGroup::QGpgMENewCryptoConfigGroup(const std::shared_ptr<QGpgMENewCryptoConfigComponent> &comp, const Option &option)
	: CryptoConfigGroup(),
	m_component(comp),
	m_option(option)
	{
	}

	QGpgMENewCryptoConfigGroup::~QGpgMENewCryptoConfigGroup() {}

	QString QGpgMENewCryptoConfigGroup::name() const
	{
	return QString::fromUtf8(m_option.name());
	}

	QString QGpgMENewCryptoConfigGroup::description() const
	{
	return QString::fromUtf8(m_option.description());
	}

	QString QGpgMENewCryptoConfigGroup::path() const
	{
	if (const std::shared_ptr<QGpgMENewCryptoConfigComponent> c = m_component.lock()) {
	return c->name() + QLatin1Char('/') + name();
	} else {
	return QString();
	}
	}

	CryptoConfigEntry::Level QGpgMENewCryptoConfigGroup::level() const
	{
	// two casts to make SunCC happy:
	return static_cast<CryptoConfigEntry::Level>(static_cast<unsigned int>(m_option.level()));
	}

	QStringList QGpgMENewCryptoConfigGroup::entryList() const
	{
	return m_entryNames;
	}

	QGpgMENewCryptoConfigEntry *QGpgMENewCryptoConfigGroup::entry(const QString &name) const
	{
	return m_entriesByName.value(name).get();
	}

	static QString urlpart_encode(const QString &str)
	{
	QString enc(str);
	enc.replace(QLatin1Char('%'), QStringLiteral("%25")); // first!
	enc.replace(QLatin1Char(':'), QStringLiteral("%3a"));
	//qCDebug(QGPGME_LOG) <<" urlpart_encode:" << str <<" ->" << enc;
	return enc;
	}

	static QString urlpart_decode(const QString &str)
	{
	return QUrl::fromPercentEncoding(str.toLatin1());
	}

	// gpgconf arg type number -> NewCryptoConfigEntry arg type enum mapping
	static QGpgME::CryptoConfigEntry::ArgType knownArgType(int argType, bool &ok)
	{
	ok = true;
	switch (argType) {
	case 0: // none
	return QGpgME::CryptoConfigEntry::ArgType_None;
	case 1: // string
	return QGpgME::CryptoConfigEntry::ArgType_String;
	case 2: // int32
	return QGpgME::CryptoConfigEntry::ArgType_Int;
	case 3: // uint32
	return QGpgME::CryptoConfigEntry::ArgType_UInt;
	case 32: // pathname
	return QGpgME::CryptoConfigEntry::ArgType_Path;
	case 33: // ldap server
	return QGpgME::CryptoConfigEntry::ArgType_LDAPURL;
	default:
	ok = false;
	return QGpgME::CryptoConfigEntry::ArgType_None;
	}
	}

	QGpgMENewCryptoConfigEntry::QGpgMENewCryptoConfigEntry(const std::shared_ptr<QGpgMENewCryptoConfigGroup> &group, const Option &option)
	: m_group(group), m_option(option)
	{
	}

	#if 0
	QVariant QGpgMENewCryptoConfigEntry::stringToValue(const QString &str, bool unescape) const
	{
	const bool isString = isStringType();

	if (isList()) {
	if (argType() == ArgType_None) {
	bool ok = true;
	const QVariant v = str.isEmpty() ? 0U : str.toUInt(&ok);
	if (!ok) {
	qCWarning(QGPGME_LOG) << "list-of-none should have an unsigned int as value:" << str;
	}
	return v;
	}
	QList<QVariant> lst;
	QStringList items = str.split(',', QString::SkipEmptyParts);
	for (QStringList::const_iterator valit = items.constBegin(); valit != items.constEnd(); ++valit) {
	QString val = *valit;
	if (isString) {
	if (val.isEmpty()) {
	lst << QVariant(QString());
	continue;
	} else if (unescape) {
	if (val[0] != '"') { // see README.gpgconf
	qCWarning(QGPGME_LOG) << "String value should start with '\"' :" << val;
	}
	val = val.mid(1);
	}
	}
	lst << QVariant(unescape ? gpgconf_unescape(val) : val);
	}
	return lst;
	} else { // not a list
	QString val(str);
	if (isString) {
	if (val.isEmpty()) {
	return QVariant(QString()); // not set [ok with lists too?]
	} else if (unescape) {
	if (val[0] != '"') { // see README.gpgconf
	qCWarning(QGPGME_LOG) << "String value should start with '\"' :" << val;
	}
	val = val.mid(1);
	}
	}
	return QVariant(unescape ? gpgconf_unescape(val) : val);
	}
	}
	#endif

	QGpgMENewCryptoConfigEntry::~QGpgMENewCryptoConfigEntry()
	{
	#ifndef NDEBUG
	if (!s_duringClear && m_option.dirty())
	qCWarning(QGPGME_LOG) << "Deleting a QGpgMENewCryptoConfigEntry that was modified (" << m_option.description() << ")"
	<< "You forgot to call sync() (to commit) or clear() (to discard)";
	#endif
	}

	QString QGpgMENewCryptoConfigEntry::name() const
	{
	return QString::fromUtf8(m_option.name());
	}

	QString QGpgMENewCryptoConfigEntry::description() const
	{
	return QString::fromUtf8(m_option.description());
	}

	QString QGpgMENewCryptoConfigEntry::path() const
	{
	if (const std::shared_ptr<QGpgMENewCryptoConfigGroup> g = m_group.lock()) {
	return g->path() + QLatin1Char('/') + name();
	} else {
	return QString();
	}
	}

	bool QGpgMENewCryptoConfigEntry::isOptional() const
	{
	return m_option.flags() & Optional;
	}

	bool QGpgMENewCryptoConfigEntry::isReadOnly() const
	{
	return m_option.flags() & NoChange;
	}

	bool QGpgMENewCryptoConfigEntry::isList() const
	{
	return m_option.flags() & List;
	}

	bool QGpgMENewCryptoConfigEntry::isRuntime() const
	{
	return m_option.flags() & Runtime;
	}

	CryptoConfigEntry::Level QGpgMENewCryptoConfigEntry::level() const
	{
	// two casts to make SunCC happy:
	return static_cast<Level>(static_cast<unsigned int>(m_option.level()));
	}

	CryptoConfigEntry::ArgType QGpgMENewCryptoConfigEntry::argType() const
	{
	bool ok = false;
	const ArgType type = knownArgType(m_option.type(), ok);
	if (ok) {
	return type;
	} else {
	return knownArgType(m_option.alternateType(), ok);
	}
	}

	bool QGpgMENewCryptoConfigEntry::isSet() const
	{
	return m_option.set();
	}

	bool QGpgMENewCryptoConfigEntry::boolValue() const
	{
	Q_ASSERT(m_option.alternateType() == NoType);
	Q_ASSERT(!isList());
	return m_option.currentValue().boolValue();
	}

	QString QGpgMENewCryptoConfigEntry::stringValue() const
	{
	//return toString( false );
	Q_ASSERT(m_option.alternateType() == StringType);
	Q_ASSERT(!isList());
	return QString::fromUtf8(m_option.currentValue().stringValue());
	}

	int QGpgMENewCryptoConfigEntry::intValue() const
	{
	Q_ASSERT(m_option.alternateType() == IntegerType);
	Q_ASSERT(!isList());
	return m_option.currentValue().intValue();
	}

	unsigned int QGpgMENewCryptoConfigEntry::uintValue() const
	{
	Q_ASSERT(m_option.alternateType() == UnsignedIntegerType);
	Q_ASSERT(!isList());
	return m_option.currentValue().uintValue();
	}

	static QUrl parseURL(int mRealArgType, const QString &str)
	{
	if (mRealArgType == 33) { // LDAP server
	// The format is HOSTNAME:PORT:USERNAME:PASSWORD:BASE_DN
	// or, since gpg 2.2.18, e.g. for dirmngr/ldapserver: [ldap:]hostname:port:username:password:base_dn:flags[:]
	const bool isLdapUrl = str.startsWith(QLatin1String("ldap://")) \|\| str.startsWith(QLatin1String("ldaps://"));
	if (!isLdapUrl) {
	const bool hasOptionalPrefix = str.startsWith(QLatin1String("ldap:"));
	const QStringList items = hasOptionalPrefix ? str.mid(5).split(QLatin1Char(':')) : str.split(QLatin1Char(':'));
	if (items.size() >= 5) {
	QUrl url;
	url.setScheme(QStringLiteral("ldap"));
	url.setHost(urlpart_decode(items[0]), QUrl::DecodedMode);

	const auto portString = items[1];
	if (!portString.isEmpty()) {
	bool ok;
	const int port = portString.toInt(&ok);
	if (ok) {
	url.setPort(port);
	} else {
	qCWarning(QGPGME_LOG) << "parseURL: malformed LDAP server port, ignoring:" << portString;
	}
	}

	const QString userName = urlpart_decode(items[2]);
	if (!userName.isEmpty()) {
	url.setUserName(userName, QUrl::DecodedMode);
	}
	const QString passWord = urlpart_decode(items[3]);
	if (!passWord.isEmpty()) {
	url.setPassword(passWord, QUrl::DecodedMode);
	}
	const auto baseDn = urlpart_decode(items[4]);
	if (!baseDn.isEmpty()) {
	url.setQuery(baseDn, QUrl::DecodedMode);
	}
	if (items.size() >= 6) {
	const auto flags = urlpart_decode(items[5]);
	if (!flags.isEmpty()) {
	url.setFragment(flags, QUrl::DecodedMode);
	}
	}
	return url;
	} else {
	qCWarning(QGPGME_LOG) << "parseURL: malformed LDAP server:" << str;
	}
	}
	}
	// other URLs : assume wellformed URL syntax.
	return QUrl(str);
	}

	static QString portToString(int port)
	{
	// -1 is used for default ports => empty string
	return port != -1 ? QString::number(port) : QString();
	}

	// The opposite of parseURL
	static QString splitURL(int mRealArgType, const QUrl &url)
	{
	if (mRealArgType == 33) { // LDAP server
	// The format is HOSTNAME:PORT:USERNAME:PASSWORD:BASE_DN
	// or, since gpg 2.2.18, e.g. for dirmngr/ldapserver: [ldap:]hostname:port:username:password:base_dn:flags[:]
	Q_ASSERT(url.scheme() == QLatin1String("ldap"));
	return urlpart_encode(url.host()) + QLatin1Char(':') +
	portToString(url.port()) + QLatin1Char(':') +
	urlpart_encode(url.userName()) + QLatin1Char(':') +
	urlpart_encode(url.password()) + QLatin1Char(':') +
	urlpart_encode(url.query()) + QLatin1Char(':') +
	urlpart_encode(url.fragment());
	}
	return url.path();
	}

	QUrl QGpgMENewCryptoConfigEntry::urlValue() const
	{
	const Type type = m_option.type();
	Q_ASSERT(type == FilenameType \|\| type == LdapServerType);
	Q_ASSERT(!isList());
	if (type == FilenameType) {
	QUrl url = QUrl::fromLocalFile(m_option.currentValue().stringValue());
	return url;
	}
	return parseURL(type, stringValue());
	}

	unsigned int QGpgMENewCryptoConfigEntry::numberOfTimesSet() const
	{
	Q_ASSERT(m_option.alternateType() == NoType);
	Q_ASSERT(isList());
	return m_option.currentValue().uintValue();
	}

	std::vector<int> QGpgMENewCryptoConfigEntry::intValueList() const
	{
	Q_ASSERT(m_option.alternateType() == IntegerType);
	Q_ASSERT(isList());
	return m_option.currentValue().intValues();
	}

	std::vector<unsigned int> QGpgMENewCryptoConfigEntry::uintValueList() const
	{
	Q_ASSERT(m_option.alternateType() == UnsignedIntegerType);
	Q_ASSERT(isList());
	return m_option.currentValue().uintValues();
	}

	QStringList QGpgMENewCryptoConfigEntry::stringValueList() const
	{
	Q_ASSERT(isList());
	const Argument arg = m_option.currentValue();
	const std::vector<const char *> values = arg.stringValues();
	QStringList ret;
	for(const char *value: values) {
	ret << QString::fromUtf8(value);
	}
	return ret;
	}

	QList<QUrl> QGpgMENewCryptoConfigEntry::urlValueList() const
	{
	const Type type = m_option.type();
	Q_ASSERT(type == FilenameType \|\| type == LdapServerType);
	Q_ASSERT(isList());
	const Argument arg = m_option.currentValue();
	const std::vector<const char *> values = arg.stringValues();
	QList<QUrl> ret;
	Q_FOREACH(const char *value, values)
	if (type == FilenameType) {
	QUrl url;
	url.setPath(QFile::decodeName(value));
	ret << url;
	} else {
	ret << parseURL(type, QString::fromUtf8(value));
	}
	return ret;
	}

	void QGpgMENewCryptoConfigEntry::resetToDefault()
	{
	m_option.resetToDefaultValue();
	}

	void QGpgMENewCryptoConfigEntry::setBoolValue(bool b)
	{
	Q_ASSERT(m_option.alternateType() == NoType);
	Q_ASSERT(!isList());
	// A "no arg" option is either set or not set.
	// Being set means createNoneArgument(), being unset means resetToDefault()
	m_option.setNewValue(m_option.createNoneArgument(b));
	}

	void QGpgMENewCryptoConfigEntry::setStringValue(const QString &str)
	{
	Q_ASSERT(m_option.alternateType() == StringType);
	Q_ASSERT(!isList());
	const Type type = m_option.type();
	// When setting a string to empty (and there's no default), we need to act like resetToDefault
	// Otherwise we try e.g. "ocsp-responder:0:" and gpgconf answers:
	// "gpgconf: argument required for option ocsp-responder"
	if (str.isEmpty() && !isOptional()) {
	m_option.resetToDefaultValue();
	} else if (type == FilenameType) {
	m_option.setNewValue(m_option.createStringArgument(QFile::encodeName(str).constData()));
	} else {
	m_option.setNewValue(m_option.createStringArgument(str.toUtf8().constData()));
	}
	}

	void QGpgMENewCryptoConfigEntry::setIntValue(int i)
	{
	Q_ASSERT(m_option.alternateType() == IntegerType);
	Q_ASSERT(!isList());
	m_option.setNewValue(m_option.createIntArgument(i));
	}

	void QGpgMENewCryptoConfigEntry::setUIntValue(unsigned int i)
	{
	Q_ASSERT(m_option.alternateType() == UnsignedIntegerType);
	Q_ASSERT(!isList());
	m_option.setNewValue(m_option.createUIntArgument(i));
	}

	void QGpgMENewCryptoConfigEntry::setURLValue(const QUrl &url)
	{
	const Type type = m_option.type();
	Q_ASSERT(type == FilenameType \|\| type == LdapServerType);
	Q_ASSERT(!isList());
	const QString str = splitURL(type, url);
	// cf. setStringValue()
	if (str.isEmpty() && !isOptional()) {
	m_option.resetToDefaultValue();
	} else if (type == FilenameType) {
	m_option.setNewValue(m_option.createStringArgument(QDir::toNativeSeparators(url.toLocalFile()).toUtf8().constData()));
	} else {
	m_option.setNewValue(m_option.createStringArgument(str.toUtf8().constData()));
	}
	}

	void QGpgMENewCryptoConfigEntry::setNumberOfTimesSet(unsigned int i)
	{
	Q_ASSERT(m_option.alternateType() == NoType);
	Q_ASSERT(isList());
	m_option.setNewValue(m_option.createNoneListArgument(i));
	}

	void QGpgMENewCryptoConfigEntry::setIntValueList(const std::vector<int> &lst)
	{
	Q_ASSERT(m_option.alternateType() == IntegerType);
	Q_ASSERT(isList());
	m_option.setNewValue(m_option.createIntListArgument(lst));
	}

	void QGpgMENewCryptoConfigEntry::setUIntValueList(const std::vector<unsigned int> &lst)
	{
	Q_ASSERT(m_option.alternateType() == UnsignedIntegerType);
	Q_ASSERT(isList());
	m_option.setNewValue(m_option.createUIntListArgument(lst));
	}

	void QGpgMENewCryptoConfigEntry::setURLValueList(const QList<QUrl> &urls)
	{
	const Type type = m_option.type();
	Q_ASSERT(m_option.alternateType() == StringType);
	Q_ASSERT(isList());
	std::vector<std::string> values;
	values.reserve(urls.size());
	Q_FOREACH (const QUrl &url, urls)
	if (type == FilenameType) {
	values.push_back(QFile::encodeName(url.path()).constData());
	} else {
	values.push_back(splitURL(type, url).toUtf8().constData());
	}
	const auto err = m_option.setNewValue(m_option.createStringListArgument(values));
	if (err) {
	qCWarning(QGPGME_LOG) << "setURLValueList: failed to set new value:" << err;
	}
	}

	bool QGpgMENewCryptoConfigEntry::isDirty() const
	{
	return m_option.dirty();
	}

	QVariant QGpgMENewCryptoConfigEntry::defaultValue() const
	{
	const auto defaultValue = m_option.defaultValue();
	if (defaultValue.isNull() \|\| defaultValue.numElements() == 0) {
	return {};
	}
	if (defaultValue.numElements() == 1) {
	switch (m_option.alternateType()) {
	case NoType:
	return QVariant{defaultValue.boolValue()};
	case StringType:
	return QVariant{QString::fromUtf8(defaultValue.stringValue())};
	case IntegerType:
	return QVariant{defaultValue.intValue()};
	case UnsignedIntegerType:
	return QVariant{defaultValue.uintValue()};
	default:
	// alternateType should always be one of the above four types
	qCWarning(QGPGME_LOG) << __func__ << ": unsupported alternateType" << m_option.alternateType();
	}
	} else {
	QList<QVariant> list;
	switch (m_option.alternateType()) {
	case StringType: {
	const auto values = defaultValue.stringValues();
	std::transform(std::begin(values), std::end(values), std::back_inserter(list),
	[] (const char *value) { return QVariant{QString::fromUtf8(value)}; });
	break;
	}
	case IntegerType: {
	const auto values = defaultValue.intValues();
	std::transform(std::begin(values), std::end(values), std::back_inserter(list),
	[] (int value) { return QVariant{value}; });
	break;
	}
	case UnsignedIntegerType: {
	const auto values = defaultValue.uintValues();
	std::transform(std::begin(values), std::end(values), std::back_inserter(list),
	[] (unsigned int value) { return QVariant{value}; });
	break;
	}
	default:
	// alternateType should always be one of the above four types
	qCWarning(QGPGME_LOG) << __func__ << ": unsupported alternateType" << m_option.alternateType() << "for list";
	}
	return QVariant{list};
	}

	return {};
	}

	#if 0
	QString QGpgMENewCryptoConfigEntry::toString(bool escape) const
	{
	// Basically the opposite of stringToValue
	if (isStringType()) {
	if (mValue.isNull()) {
	return QString();
	} else if (isList()) { // string list
	QStringList lst = mValue.toStringList();
	if (escape) {
	for (QStringList::iterator it = lst.begin(); it != lst.end(); ++it) {
	if (!(*it).isNull()) {
	it = gpgconf_escape(it).prepend("\"");
	}
	}
	}
	QString res = lst.join(",");
	//qCDebug(QGPGME_LOG) <<"toString:" << res;
	return res;
	} else { // normal string
	QString res = mValue.toString();
	if (escape) {
	res = gpgconf_escape(res).prepend("\"");
	}
	return res;
	}
	}
	if (!isList()) { // non-list non-string
	if (mArgType == ArgType_None) {
	return mValue.toBool() ? QString::fromLatin1("1") : QString();
	} else { // some int
	Q_ASSERT(mArgType == ArgType_Int \|\| mArgType == ArgType_UInt);
	return mValue.toString(); // int to string conversion
	}
	}

	// Lists (of other types than strings)
	if (mArgType == ArgType_None) {
	return QString::number(numberOfTimesSet());
	}
	QStringList ret;
	QList<QVariant> lst = mValue.toList();
	for (QList<QVariant>::const_iterator it = lst.constBegin(); it != lst.constEnd(); ++it) {
	ret << (*it).toString(); // QVariant does the conversion
	}
	return ret.join(",");
	}

	QString QGpgMENewCryptoConfigEntry::outputString() const
	{
	Q_ASSERT(mSet);
	return toString(true);
	}

	bool QGpgMENewCryptoConfigEntry::isStringType() const
	{
	return (mArgType == QGpgME::NewCryptoConfigEntry::ArgType_String
	\|\| mArgType == QGpgME::NewCryptoConfigEntry::ArgType_Path
	\|\| mArgType == QGpgME::NewCryptoConfigEntry::ArgType_URL
	\|\| mArgType == QGpgME::NewCryptoConfigEntry::ArgType_LDAPURL);
	}

	void QGpgMENewCryptoConfigEntry::setDirty(bool b)
	{
	mDirty = b;
	}
	#endif

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