pivcardwidget.cpp
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	/* view/pivcardwiget.cpp

	This file is part of Kleopatra, the KDE keymanager
	SPDX-FileCopyrightText: 2020 g10 Code GmbH
	SPDX-FileContributor: Ingo Klöcker <dev@ingo-kloecker.de>

	SPDX-License-Identifier: GPL-2.0-or-later
	*/

	#include "pivcardwidget.h"

	#include "tooltippreferences.h"

	#include "commands/certificatetopivcardcommand.h"
	#include "commands/changepincommand.h"
	#include "commands/importcertificatefrompivcardcommand.h"
	#include "commands/keytocardcommand.h"
	#include "commands/pivgeneratecardkeycommand.h"
	#include "commands/setpivcardapplicationadministrationkeycommand.h"

	#include "smartcard/pivcard.h"
	#include "smartcard/readerstatus.h"

	#include <Libkleo/Dn>
	#include <Libkleo/Formatting>
	#include <Libkleo/KeyCache>

	#include <KLocalizedString>
	#include <KMessageBox>

	#include <QFrame>
	#include <QGridLayout>
	#include <QLabel>
	#include <QPushButton>
	#include <QScrollArea>
	#include <QVBoxLayout>

	using namespace GpgME;
	using namespace Kleo;
	using namespace Kleo::Commands;
	using namespace Kleo::SmartCard;

	namespace {
	static QString formatVersion(int value)
	{
	if (value < 0) {
	return QLatin1String("n/a");
	}

	const unsigned int a = ((value >> 24) & 0xff);
	const unsigned int b = ((value >> 16) & 0xff);
	const unsigned int c = ((value >> 8) & 0xff);
	const unsigned int d = ((value ) & 0xff);
	if (a) {
	return QStringLiteral("%1.%2.%3.%4").arg(QString::number(a), QString::number(b), QString::number(c), QString::number(d));
	} else if (b) {
	return QStringLiteral("%1.%2.%3").arg(QString::number(b), QString::number(c), QString::number(d));
	} else if (c) {
	return QStringLiteral("%1.%2").arg(QString::number(c), QString::number(d));
	}
	return QString::number(d);
	}

	static void layoutKeyWidgets(QGridLayout *grid, const QString &keyName, const PIVCardWidget::KeyWidgets &keyWidgets)
	{
	int row = grid->rowCount();
	grid->addWidget(new QLabel(keyName), row, 0);
	grid->addWidget(keyWidgets.certificateInfo, row, 1, 1, 2);
	grid->addWidget(keyWidgets.generateButton, row, 3);
	if (keyWidgets.writeKeyButton) {
	grid->addWidget(keyWidgets.writeKeyButton, row, 4);
	}
	row++;
	grid->addWidget(keyWidgets.keyGrip, row, 1);
	grid->addWidget(keyWidgets.keyAlgorithm, row, 2);
	grid->addWidget(keyWidgets.writeCertificateButton, row, 3);
	grid->addWidget(keyWidgets.importCertificateButton, row, 4);
	}

	static int toolTipOptions()
	{
	using namespace Kleo::Formatting;
	static const int validityFlags = Validity \| Issuer \| ExpiryDates \| CertificateUsage;
	static const int ownerFlags = Subject \| UserIDs \| OwnerTrust;
	static const int detailsFlags = StorageLocation \| CertificateType \| SerialNumber \| Fingerprint;

	const TooltipPreferences prefs;

	int flags = KeyID;
	flags \|= prefs.showValidity() ? validityFlags : 0;
	flags \|= prefs.showOwnerInformation() ? ownerFlags : 0;
	flags \|= prefs.showCertificateDetails() ? detailsFlags : 0;
	return flags;
	}
	}

	PIVCardWidget::PIVCardWidget(QWidget *parent):
	QWidget(parent),
	mSerialNumber(new QLabel(this)),
	mVersionLabel(new QLabel(this))
	{
	// Set up the scroll area
	auto myLayout = new QVBoxLayout(this);

	auto area = new QScrollArea;
	area->setFrameShape(QFrame::NoFrame);
	area->setWidgetResizable(true);
	myLayout->addWidget(area);

	auto areaWidget = new QWidget;
	area->setWidget(areaWidget);

	auto areaVLay = new QVBoxLayout(areaWidget);

	auto grid = new QGridLayout;
	areaVLay->addLayout(grid);
	areaVLay->addStretch(1);

	const int columnCount = 5;
	int row = 0;

	// Version and Serialnumber
	grid->addWidget(mVersionLabel, row++, 0, 1, 2);
	mVersionLabel->setTextInteractionFlags(Qt::TextBrowserInteraction);

	grid->addWidget(new QLabel(i18n("Serial number:")), row, 0);
	grid->addWidget(mSerialNumber, row++, 1);
	mSerialNumber->setTextInteractionFlags(Qt::TextBrowserInteraction);

	{
	auto line = new QFrame();
	line->setFrameShape(QFrame::HLine);
	grid->addWidget(line, row++, 0, 1, columnCount);
	}

	// The keys
	grid->addWidget(new QLabel(QStringLiteral("<b>%1</b>").arg(i18n("Keys:"))), row++, 0);

	{
	KeyWidgets keyWidgets = createKeyWidgets(PIVCard::pivAuthenticationKeyRef());
	layoutKeyWidgets(grid, i18n("PIV authentication:"), keyWidgets);
	}
	{
	KeyWidgets keyWidgets = createKeyWidgets(PIVCard::cardAuthenticationKeyRef());
	layoutKeyWidgets(grid, i18n("Card authentication:"), keyWidgets);
	}
	{
	KeyWidgets keyWidgets = createKeyWidgets(PIVCard::digitalSignatureKeyRef());
	layoutKeyWidgets(grid, i18n("Digital signature:"), keyWidgets);
	}
	{
	KeyWidgets keyWidgets = createKeyWidgets(PIVCard::keyManagementKeyRef());
	layoutKeyWidgets(grid, i18n("Key management:"), keyWidgets);
	}
	row = grid->rowCount();

	{
	auto line = new QFrame();
	line->setFrameShape(QFrame::HLine);
	grid->addWidget(line, row++, 0, 1, columnCount);
	}

	auto actionLayout = new QHBoxLayout;

	{
	auto button = new QPushButton(i18nc("@action:button", "Change PIN"));
	button->setToolTip(i18nc("@info:tooltip", "Change the PIV Card Application PIN that activates the PIV Card "
	"and enables private key operations using the stored keys."));
	actionLayout->addWidget(button);
	connect(button, &QPushButton::clicked, this, [this] () { changePin(PIVCard::pinKeyRef()); });
	}
	{
	auto button = new QPushButton(i18nc("@action:button", "Change PUK"));
	button->setToolTip(i18nc("@info:tooltip", "Change the PIN Unblocking Key that enables a reset of the PIN."));
	actionLayout->addWidget(button);
	connect(button, &QPushButton::clicked, this, [this] () { changePin(PIVCard::pukKeyRef()); });
	}
	{
	auto button = new QPushButton(i18nc("@action:button", "Change Admin Key"));
	button->setToolTip(i18nc("@info:tooltip", "Change the PIV Card Application Administration Key that is used by the "
	"PIV Card Application to authenticate the PIV Card Application Administrator and by the "
	"administrator (resp. Kleopatra) to authenticate the PIV Card Application."));
	actionLayout->addWidget(button);
	connect(button, &QPushButton::clicked, this, [this] () { setAdminKey(); });
	}

	actionLayout->addStretch(-1);
	grid->addLayout(actionLayout, row++, 0, 1, columnCount);

	grid->setColumnStretch(4, -1);
	}

	PIVCardWidget::KeyWidgets PIVCardWidget::createKeyWidgets(const std::string &keyRef)
	{
	KeyWidgets keyWidgets;
	keyWidgets.keyGrip = new QLabel(this);
	keyWidgets.keyGrip->setTextInteractionFlags(Qt::TextBrowserInteraction);
	keyWidgets.keyAlgorithm = new QLabel(this);
	keyWidgets.keyAlgorithm->setTextInteractionFlags(Qt::TextSelectableByMouse);
	keyWidgets.certificateInfo = new QLabel(this);
	keyWidgets.certificateInfo->setTextInteractionFlags(Qt::TextBrowserInteraction);
	keyWidgets.generateButton = new QPushButton(i18nc("@action:button", "Generate"), this);
	keyWidgets.generateButton->setEnabled(false);
	connect(keyWidgets.generateButton, &QPushButton::clicked,
	this, [this, keyRef] () { generateKey(keyRef); });
	keyWidgets.writeCertificateButton = new QPushButton(i18nc("@action:button", "Write Certificate"));
	keyWidgets.writeCertificateButton->setToolTip(i18nc("@info:tooltip", "Write the certificate corresponding to this key to the card"));
	keyWidgets.writeCertificateButton->setEnabled(false);
	connect(keyWidgets.writeCertificateButton, &QPushButton::clicked,
	this, [this, keyRef] () { writeCertificateToCard(keyRef); });
	keyWidgets.importCertificateButton = new QPushButton(i18nc("@action:button", "Import Certificate"));
	keyWidgets.importCertificateButton->setToolTip(i18nc("@info:tooltip", "Import the certificate stored on the card"));
	keyWidgets.importCertificateButton->setEnabled(false);
	connect(keyWidgets.importCertificateButton, &QPushButton::clicked,
	this, [this, keyRef] () { importCertificateFromCard(keyRef); });
	if (keyRef == PIVCard::keyManagementKeyRef()) {
	keyWidgets.writeKeyButton = new QPushButton(i18nc("@action:button", "Write Key"));
	keyWidgets.writeKeyButton->setToolTip(i18nc("@info:tooltip", "Write the key pair of a certificate to the card"));
	keyWidgets.writeKeyButton->setEnabled(true);
	connect(keyWidgets.writeKeyButton, &QPushButton::clicked,
	this, [this, keyRef] () { writeKeyToCard(keyRef); });
	}
	mKeyWidgets.insert(keyRef, keyWidgets);
	return keyWidgets;
	}

	PIVCardWidget::~PIVCardWidget()
	{
	}

	void PIVCardWidget::setCard(const PIVCard *card)
	{
	mCardSerialNumber = card->serialNumber();
	mVersionLabel->setText(i18nc("%1 version number", "PIV v%1 card", formatVersion(card->appVersion())));

	if (card->displaySerialNumber() != card->serialNumber()) {
	mSerialNumber->setText(QStringLiteral("%1 (%2)").arg(QString::fromStdString(card->displaySerialNumber()),
	QString::fromStdString(card->serialNumber())));
	} else {
	mSerialNumber->setText(QString::fromStdString(card->serialNumber()));
	}

	updateKeyWidgets(PIVCard::pivAuthenticationKeyRef(), card);
	updateKeyWidgets(PIVCard::cardAuthenticationKeyRef(), card);
	updateKeyWidgets(PIVCard::digitalSignatureKeyRef(), card);
	updateKeyWidgets(PIVCard::keyManagementKeyRef(), card);
	}

	void PIVCardWidget::updateKeyWidgets(const std::string &keyRef, const PIVCard *card)
	{
	KeyWidgets widgets = mKeyWidgets.value(keyRef);
	const std::string grip = card ? card->keyGrip(keyRef) : widgets.keyGrip->text().toStdString();
	if (grip.empty()) {
	widgets.certificateInfo->setText(i18nc("@info", "<em>slot empty</em>"));
	widgets.certificateInfo->setToolTip(QString());
	widgets.keyGrip->setText(QString());
	widgets.keyAlgorithm->setText(QString());
	widgets.generateButton->setText(i18nc("@action:button", "Generate"));
	widgets.generateButton->setToolTip(
	i18nc("@info:tooltip %1 display name of a key", "Generate %1", PIVCard::keyDisplayName(keyRef)));
	widgets.writeCertificateButton->setEnabled(false);
	widgets.importCertificateButton->setEnabled(false);
	} else {
	const Key certificate = KeyCache::instance()->findSubkeyByKeyGrip(grip).parent();
	if (!certificate.isNull() && certificate.protocol() == GpgME::CMS) {
	widgets.certificateInfo->setText(
	i18nc("X.509 certificate DN (validity, created: date)", "%1 (%2, created: %3)",
	DN(certificate.userID(0).id()).prettyDN(),
	Formatting::complianceStringShort(certificate),
	Formatting::creationDateString(certificate)));
	widgets.certificateInfo->setToolTip(Formatting::toolTip(certificate, toolTipOptions()));
	widgets.writeCertificateButton->setEnabled(true);
	} else {
	widgets.certificateInfo->setText(i18nc("@info", "<em>no matching certificate</em>"));
	widgets.certificateInfo->setToolTip(QString());
	widgets.writeCertificateButton->setEnabled(false);
	}
	if (card) {
	// update information if called with card
	widgets.keyGrip->setText(QString::fromStdString(grip));
	const std::string algo = card->keyAlgorithm(keyRef);
	widgets.keyAlgorithm->setText(algo.empty() ? i18nc("@info unknown key algorithm", "unknown") : QString::fromStdString(algo));
	widgets.importCertificateButton->setEnabled(!card->certificateData(keyRef).empty());
	}
	widgets.generateButton->setText(i18nc("@action:button", "Replace"));
	widgets.generateButton->setToolTip(
	i18nc("@info:tooltip %1 display name of a key", "Replace %1 with new key", PIVCard::keyDisplayName(keyRef)));
	}

	widgets.generateButton->setEnabled(true);
	}

	void PIVCardWidget::generateKey(const std::string &keyref)
	{
	auto cmd = new PIVGenerateCardKeyCommand(mCardSerialNumber, this);
	this->setEnabled(false);
	connect(cmd, &PIVGenerateCardKeyCommand::finished,
	this, [this]() {
	this->setEnabled(true);
	});
	cmd->setKeyRef(keyref);
	cmd->start();
	}

	void PIVCardWidget::writeCertificateToCard(const std::string &keyref)
	{
	auto cmd = new CertificateToPIVCardCommand(keyref, mCardSerialNumber);
	this->setEnabled(false);
	connect(cmd, &CertificateToPIVCardCommand::finished,
	this, [this]() {
	this->setEnabled(true);
	});
	cmd->setParentWidget(this);
	cmd->start();
	}

	void PIVCardWidget::importCertificateFromCard(const std::string &keyref)
	{
	auto cmd = new ImportCertificateFromPIVCardCommand(keyref, mCardSerialNumber);
	this->setEnabled(false);
	connect(cmd, &ImportCertificateFromPIVCardCommand::finished,
	this, [this, keyref] () {
	this->updateKeyWidgets(keyref, nullptr);
	this->setEnabled(true);
	});
	cmd->setParentWidget(this);
	cmd->start();
	}

	void PIVCardWidget::writeKeyToCard(const std::string &keyref)
	{
	auto cmd = new KeyToCardCommand(keyref, mCardSerialNumber, PIVCard::AppName);
	this->setEnabled(false);
	connect(cmd, &KeyToCardCommand::finished,
	this, [this]() {
	this->setEnabled(true);
	});
	cmd->setParentWidget(this);
	cmd->start();
	}

	void PIVCardWidget::changePin(const std::string &keyRef)
	{
	auto cmd = new ChangePinCommand(mCardSerialNumber, PIVCard::AppName, this);
	this->setEnabled(false);
	connect(cmd, &ChangePinCommand::finished,
	this, [this]() {
	this->setEnabled(true);
	});
	cmd->setKeyRef(keyRef);
	cmd->start();
	}

	void PIVCardWidget::setAdminKey()
	{
	auto cmd = new SetPIVCardApplicationAdministrationKeyCommand(mCardSerialNumber, this);
	this->setEnabled(false);
	connect(cmd, &SetPIVCardApplicationAdministrationKeyCommand::finished,
	this, [this]() {
	this->setEnabled(true);
	});
	cmd->start();
	}

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