messagepart.cpp
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messagepart.cpp
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	// SPDX-FileCopyrightText: 2015 Sandro Knauß <knauss@kolabsys.com>
	// SPDX-FileCopyrightText: 2017 Christian Mollekopf <mollekopf@kolabsys.com>
	// SPDX-License-Identifier: LGPL-2.0-or-later

	#include "messagepart.h"
	#include "cryptohelper.h"
	#include "mimetreeparser_core_debug.h"
	#include "objecttreeparser.h"

	#include "utils.h"

	#include <KLocalizedString>
	#include <KMime/Content>
	#include <Libkleo/Compliance>
	#include <Libkleo/KeyCache>

	#include <QGpgME/DN>
	#include <QGpgME/DecryptVerifyJob>
	#include <QGpgME/Protocol>
	#include <QGpgME/VerifyDetachedJob>
	#include <QGpgME/VerifyOpaqueJob>

	#include <QStringDecoder>

	#include <gpgme++/key.h>
	#include <gpgme++/keylistresult.h>
	#include <gpgme.h>

	using namespace MimeTreeParser;

	//------MessagePart-----------------------
	MessagePart::MessagePart(ObjectTreeParser otp, const QString &text, KMime::Content node)
	: mText(text)
	, mOtp(otp)
	, mParentPart(nullptr)
	, mNode(node) // only null for messagepartlist
	, mError(NoError)
	, mRoot(false)
	{
	}

	MessagePart::~MessagePart()
	{
	for (auto n : std::as_const(mNodesToDelete)) {
	delete n;
	}
	}

	MessagePart::Disposition MessagePart::disposition() const
	{
	if (!mNode) {
	return Invalid;
	}
	const auto cd = mNode->contentDisposition(false);
	if (!cd) {
	return Invalid;
	}
	switch (cd->disposition()) {
	case KMime::Headers::CDinline:
	return Inline;
	case KMime::Headers::CDattachment:
	return Attachment;
	default:
	return Invalid;
	}
	}

	QString MessagePart::filename() const
	{
	if (!mNode) {
	return {};
	}

	if (const auto cd = mNode->contentDisposition(false)) {
	const auto name = cd->filename();
	// Allow for a fallback for mails that have a ContentDisposition header, but don't set the filename anyways.
	// Not the recommended way, but exists.
	if (!name.isEmpty()) {
	return name;
	}
	}
	if (const auto ct = mNode->contentType(false)) {
	return ct->name();
	}
	return {};
	}

	static KMime::Headers::ContentType contentType(KMime::Content node)
	{
	if (node) {
	return node->contentType(false);
	}
	return nullptr;
	}

	QByteArray MessagePart::charset() const
	{
	if (!mNode) {
	return QByteArrayLiteral("us-ascii");
	}
	if (auto ct = contentType(mNode)) {
	return ct->charset();
	}
	// Per rfc2045 us-ascii is the default
	return QByteArrayLiteral("us-ascii");
	}

	QByteArray MessagePart::mimeType() const
	{
	if (auto ct = contentType(mNode)) {
	return ct->mimeType();
	}
	return {};
	}

	bool MessagePart::isText() const
	{
	if (auto ct = contentType(mNode)) {
	return ct->isText();
	}
	return false;
	}

	MessagePart::Error MessagePart::error() const
	{
	return mError;
	}

	QString MessagePart::errorString() const
	{
	return mMetaData.errorText;
	}

	PartMetaData *MessagePart::partMetaData()
	{
	return &mMetaData;
	}

	bool MessagePart::isAttachment() const
	{
	if (mNode) {
	return KMime::isAttachment(mNode);
	}
	return false;
	}

	KMime::Content *MessagePart::node() const
	{
	return mNode;
	}

	void MessagePart::setIsRoot(bool root)
	{
	mRoot = root;
	}

	bool MessagePart::isRoot() const
	{
	return mRoot;
	}

	QString MessagePart::text() const
	{
	return mText;
	}

	void MessagePart::setText(const QString &text)
	{
	mText = text;
	}

	bool MessagePart::isHtml() const
	{
	return false;
	}

	MessagePart *MessagePart::parentPart() const
	{
	return mParentPart;
	}

	void MessagePart::setParentPart(MessagePart *parentPart)
	{
	mParentPart = parentPart;
	}

	QString MessagePart::htmlContent() const
	{
	return text();
	}

	QString MessagePart::plaintextContent() const
	{
	return text();
	}

	void MessagePart::parseInternal(KMime::Content *node, bool onlyOneMimePart)
	{
	auto subMessagePart = mOtp->parseObjectTreeInternal(node, onlyOneMimePart);
	mRoot = subMessagePart->isRoot();
	for (const auto &part : std::as_const(subMessagePart->subParts())) {
	appendSubPart(part);
	}
	}

	void MessagePart::parseInternal(const QByteArray &data)
	{
	auto tempNode = new KMime::Content();

	const auto lfData = KMime::CRLFtoLF(data);
	// We have to deal with both bodies and full parts. In inline encrypted/signed parts we can have nested parts,
	// or just plain-text, and both ends up here. setContent defaults to setting only the header, so we have to avoid this.
	if (lfData.contains("\n\n")) {
	tempNode->setContent(lfData);
	} else {
	tempNode->setBody(lfData);
	}
	tempNode->parse();
	tempNode->contentType()->setCharset(charset());
	bindLifetime(tempNode);

	if (!tempNode->head().isEmpty()) {
	tempNode->contentDescription()->from7BitString(QByteArrayLiteral("temporary node"));
	}

	parseInternal(tempNode);
	}

	QString MessagePart::renderInternalText() const
	{
	QString text;
	for (const auto &mp : subParts()) {
	text += mp->text();
	}
	return text;
	}

	void MessagePart::appendSubPart(const MessagePart::Ptr &messagePart)
	{
	messagePart->setParentPart(this);
	mBlocks.append(messagePart);
	}

	const QList<MessagePart::Ptr> &MessagePart::subParts() const
	{
	return mBlocks;
	}

	bool MessagePart::hasSubParts() const
	{
	return !mBlocks.isEmpty();
	}

	QList<SignedMessagePart *> MessagePart::signatures() const
	{
	QList<SignedMessagePart *> list;
	if (auto sig = dynamic_cast<SignedMessagePart >(const_cast<MessagePart >(this))) {
	list << sig;
	}
	auto parent = parentPart();
	while (parent) {
	if (auto sig = dynamic_cast<SignedMessagePart *>(parent)) {
	list << sig;
	}
	parent = parent->parentPart();
	}
	return list;
	}

	QList<EncryptedMessagePart *> MessagePart::encryptions() const
	{
	QList<EncryptedMessagePart *> list;
	if (auto sig = dynamic_cast<EncryptedMessagePart >(const_cast<MessagePart >(this))) {
	list << sig;
	}
	auto parent = parentPart();
	while (parent) {
	if (auto sig = dynamic_cast<EncryptedMessagePart *>(parent)) {
	list << sig;
	}
	parent = parent->parentPart();
	}
	return list;
	}

	KMMsgEncryptionState MessagePart::encryptionState() const
	{
	if (!encryptions().isEmpty()) {
	return KMMsgFullyEncrypted;
	}
	return KMMsgNotEncrypted;
	}

	KMMsgSignatureState MessagePart::signatureState() const
	{
	if (!signatures().isEmpty()) {
	return KMMsgFullySigned;
	}
	return KMMsgNotSigned;
	}

	void MessagePart::bindLifetime(KMime::Content *node)
	{
	mNodesToDelete << node;
	}

	KMime::Headers::Base MimeTreeParser::MessagePart::header(const char header) const
	{
	if (node() && node()->hasHeader(header)) {
	return node()->headerByType(header);
	}
	if (auto parent = parentPart()) {
	return parent->header(header);
	}

	return nullptr;
	}

	//-----MessagePartList----------------------
	MessagePartList::MessagePartList(ObjectTreeParser otp, KMime::Content node)
	: MessagePart(otp, QString(), node)
	{
	}

	QString MessagePartList::text() const
	{
	return renderInternalText();
	}

	QString MessagePartList::plaintextContent() const
	{
	return QString();
	}

	QString MessagePartList::htmlContent() const
	{
	return QString();
	}

	//-----TextMessageBlock----------------------

	TextMessagePart::TextMessagePart(ObjectTreeParser otp, KMime::Content node)
	: MessagePartList(otp, node)
	, mSignatureState(KMMsgSignatureStateUnknown)
	, mEncryptionState(KMMsgEncryptionStateUnknown)
	{
	if (!mNode) {
	qCWarning(MIMETREEPARSER_CORE_LOG) << "not a valid node";
	return;
	}

	parseContent();
	}

	void TextMessagePart::parseContent()
	{
	mSignatureState = KMMsgNotSigned;
	mEncryptionState = KMMsgNotEncrypted;
	const auto blocks = prepareMessageForDecryption(mNode->decodedContent());
	// We also get blocks for unencrypted messages
	if (!blocks.isEmpty()) {
	auto aCodec = QStringDecoder(mOtp->codecNameFor(mNode).constData());
	const auto cryptProto = QGpgME::openpgp();

	/* The (overall) signature/encrypted status is broken
	* if one unencrypted part is at the beginning or in the middle
	* because mailmain adds an unencrypted part at the end this should not break the overall status
	*
	* That's why we first set the tmp status and if one crypted/signed block comes afterwards, than
	* the status is set to unencryped
	*/
	bool fullySignedOrEncrypted = true;
	bool fullySignedOrEncryptedTmp = true;

	for (const auto &block : blocks) {
	if (!fullySignedOrEncryptedTmp) {
	fullySignedOrEncrypted = false;
	}

	if (block.type() == NoPgpBlock && !block.text().trimmed().isEmpty()) {
	fullySignedOrEncryptedTmp = false;
	appendSubPart(MessagePart::Ptr(new MessagePart(mOtp, aCodec.decode(KMime::CRLFtoLF(block.text())))));
	} else if (block.type() == PgpMessageBlock) {
	auto content = new KMime::Content;
	content->setBody(block.text());
	content->parse();
	content->contentType()->setCharset(charset());
	EncryptedMessagePart::Ptr mp(new EncryptedMessagePart(mOtp, QString(), cryptProto, content, content, false));
	mp->bindLifetime(content);
	mp->setIsEncrypted(true);
	appendSubPart(mp);
	} else if (block.type() == ClearsignedBlock) {
	auto content = new KMime::Content;
	content->setBody(block.text());
	content->parse();
	content->contentType()->setCharset(charset());
	SignedMessagePart::Ptr mp(new SignedMessagePart(mOtp, cryptProto, nullptr, content, false));
	mp->bindLifetime(content);
	mp->setIsSigned(true);
	appendSubPart(mp);
	} else {
	continue;
	}

	const auto mp = subParts().last().staticCast<MessagePart>();
	const PartMetaData *messagePart(mp->partMetaData());

	if (!messagePart->isEncrypted && !messagePart->isSigned && !block.text().trimmed().isEmpty()) {
	mp->setText(aCodec.decode(KMime::CRLFtoLF(block.text())));
	}

	if (messagePart->isEncrypted) {
	mEncryptionState = KMMsgPartiallyEncrypted;
	}

	if (messagePart->isSigned) {
	mSignatureState = KMMsgPartiallySigned;
	}
	}

	// Do we have an fully Signed/Encrypted Message?
	if (fullySignedOrEncrypted) {
	if (mSignatureState == KMMsgPartiallySigned) {
	mSignatureState = KMMsgFullySigned;
	}
	if (mEncryptionState == KMMsgPartiallyEncrypted) {
	mEncryptionState = KMMsgFullyEncrypted;
	}
	}
	}
	}

	KMMsgEncryptionState TextMessagePart::encryptionState() const
	{
	if (mEncryptionState == KMMsgNotEncrypted) {
	return MessagePart::encryptionState();
	}
	return mEncryptionState;
	}

	KMMsgSignatureState TextMessagePart::signatureState() const
	{
	if (mSignatureState == KMMsgNotSigned) {
	return MessagePart::signatureState();
	}
	return mSignatureState;
	}

	//-----AttachmentMessageBlock----------------------

	AttachmentMessagePart::AttachmentMessagePart(ObjectTreeParser otp, KMime::Content node)
	: TextMessagePart(otp, node)
	{
	}

	//-----HtmlMessageBlock----------------------

	HtmlMessagePart::HtmlMessagePart(ObjectTreeParser otp, KMime::Content node)
	: MessagePart(otp, QString(), node)
	{
	if (!mNode) {
	qCWarning(MIMETREEPARSER_CORE_LOG) << "not a valid node";
	return;
	}

	setText(QStringDecoder(mOtp->codecNameFor(mNode).constData()).decode(KMime::CRLFtoLF(mNode->decodedContent())));
	}

	//-----MimeMessageBlock----------------------

	MimeMessagePart::MimeMessagePart(ObjectTreeParser otp, KMime::Content node, bool onlyOneMimePart)
	: MessagePart(otp, QString(), node)
	{
	if (!mNode) {
	qCWarning(MIMETREEPARSER_CORE_LOG) << "not a valid node";
	return;
	}

	parseInternal(mNode, onlyOneMimePart);
	}

	MimeMessagePart::~MimeMessagePart()
	{
	}

	QString MimeMessagePart::text() const
	{
	return renderInternalText();
	}

	QString MimeMessagePart::plaintextContent() const
	{
	return QString();
	}

	QString MimeMessagePart::htmlContent() const
	{
	return QString();
	}

	//-----AlternativeMessagePart----------------------

	AlternativeMessagePart::AlternativeMessagePart(ObjectTreeParser otp, KMime::Content node)
	: MessagePart(otp, QString(), node)
	{
	if (auto dataIcal = findTypeInDirectChildren(mNode, "text/calendar")) {
	mChildParts[MultipartIcal] = MimeMessagePart::Ptr(new MimeMessagePart(mOtp, dataIcal, true));
	}

	if (auto dataText = findTypeInDirectChildren(mNode, "text/plain")) {
	mChildParts[MultipartPlain] = MimeMessagePart::Ptr(new MimeMessagePart(mOtp, dataText, true));
	}

	if (auto dataHtml = findTypeInDirectChildren(mNode, "text/html")) {
	mChildParts[MultipartHtml] = MimeMessagePart::Ptr(new MimeMessagePart(mOtp, dataHtml, true));
	} else {
	// If we didn't find the HTML part as the first child of the multipart/alternative, it might
	// be that this is a HTML message with images, and text/plain and multipart/related are the
	// immediate children of this multipart/alternative node.
	// In this case, the HTML node is a child of multipart/related.
	// In the case of multipart/related we don't expect multiple html parts, it is usually used to group attachments
	// with html content.
	//
	// In any case, this is not a complete implementation of MIME, but an approximation for the kind of mails we actually see in the wild.
	auto data = [&] {
	if (auto d = findTypeInDirectChildren(mNode, "multipart/related")) {
	return d;
	}
	return findTypeInDirectChildren(mNode, "multipart/mixed");
	}();
	if (data) {
	QString htmlContent;
	const auto parts = data->contents();
	for (auto p : parts) {
	if ((!p->contentType()->isEmpty()) && (p->contentType()->mimeType() == "text/html")) {
	htmlContent += MimeMessagePart(mOtp, p, true).text();
	} else if (KMime::isAttachment(p)) {
	appendSubPart(MimeMessagePart::Ptr(new MimeMessagePart(otp, p, true)));
	}
	}
	mChildParts[MultipartHtml] = MessagePart::Ptr(new MessagePart(mOtp, htmlContent, nullptr));
	}
	}
	}

	AlternativeMessagePart::~AlternativeMessagePart()
	{
	}

	QList<AlternativeMessagePart::HtmlMode> AlternativeMessagePart::availableModes()
	{
	return mChildParts.keys();
	}

	QString AlternativeMessagePart::text() const
	{
	if (mChildParts.contains(MultipartPlain)) {
	return mChildParts[MultipartPlain]->text();
	}
	return QString();
	}

	bool AlternativeMessagePart::isHtml() const
	{
	return mChildParts.contains(MultipartHtml);
	}

	QString AlternativeMessagePart::plaintextContent() const
	{
	return text();
	}

	QString AlternativeMessagePart::htmlContent() const
	{
	if (mChildParts.contains(MultipartHtml)) {
	return mChildParts[MultipartHtml]->text();
	} else {
	return plaintextContent();
	}
	}

	QString AlternativeMessagePart::icalContent() const
	{
	if (mChildParts.contains(MultipartIcal)) {
	return mChildParts[MultipartIcal]->text();
	}
	return {};
	}

	//-----CertMessageBlock----------------------

	CertMessagePart::CertMessagePart(ObjectTreeParser otp, KMime::Content node, QGpgME::Protocol *cryptoProto)
	: MessagePart(otp, QString(), node)
	, mCryptoProto(cryptoProto)
	{
	if (!mNode) {
	qCWarning(MIMETREEPARSER_CORE_LOG) << "not a valid node";
	return;
	}
	}

	CertMessagePart::~CertMessagePart()
	{
	}

	QString CertMessagePart::text() const
	{
	return QString();
	}

	//-----SignedMessageBlock---------------------
	SignedMessagePart::SignedMessagePart(ObjectTreeParser *otp,
	const QGpgME::Protocol *cryptoProto,
	KMime::Content *node,
	KMime::Content *signedData,
	bool parseAfterDecryption)
	: MessagePart(otp, {}, node)
	, mParseAfterDecryption(parseAfterDecryption)
	, mCryptoProto(cryptoProto)
	, mSignedData(signedData)
	{
	mMetaData.isSigned = true;
	mMetaData.isGoodSignature = false;
	mMetaData.status = i18ndc("mimetreeparser", "@info:status", "Wrong Crypto Plug-In.");
	}

	SignedMessagePart::~SignedMessagePart()
	{
	}

	void SignedMessagePart::setIsSigned(bool isSigned)
	{
	mMetaData.isSigned = isSigned;
	}

	bool SignedMessagePart::isSigned() const
	{
	return mMetaData.isSigned;
	}

	static QString prettifyDN(const char *uid)
	{
	// We used to use QGpgME::DN::prettyDN here. But I'm not sure what we actually need it for.
	return QString::fromUtf8(uid);
	}

	const QGpgME::Protocol *SignedMessagePart::cryptoProto() const
	{
	return mCryptoProto;
	}

	void SignedMessagePart::startVerification()
	{
	if (!mSignedData) {
	return;
	}

	mMetaData.isSigned = false;
	mMetaData.status = i18ndc("mimetreeparser", "@info:status", "Wrong Crypto Plug-In.");
	mMetaData.isEncrypted = false;
	mMetaData.isDecryptable = false;

	auto codec = QStringDecoder(mOtp->codecNameFor(mSignedData).constData());

	// If we have a mNode, this is a detached signature
	if (mNode) {
	const auto signature = mNode->decodedContent();

	// This is necessary in case the original data contained CRLF's. Otherwise the signature will not match the data (since KMIME normalizes to LF)
	const QByteArray signedData = KMime::LFtoCRLF(mSignedData->encodedContent());

	const auto job = mCryptoProto->verifyDetachedJob();
	setVerificationResult(job->exec(signature, signedData), signedData);
	job->deleteLater();
	setText(codec.decode(KMime::CRLFtoLF(signedData)));
	} else {
	QByteArray outdata;
	const auto job = mCryptoProto->verifyOpaqueJob();
	setVerificationResult(job->exec(mSignedData->decodedContent(), outdata), outdata);
	job->deleteLater();
	setText(codec.decode(KMime::CRLFtoLF(outdata)));
	}

	if (!mMetaData.isSigned) {
	mMetaData.creationTime = QDateTime();
	}
	}

	static int signatureToStatus(const GpgME::Signature &sig)
	{
	switch (sig.status().code()) {
	case GPG_ERR_NO_ERROR:
	return GPGME_SIG_STAT_GOOD;
	case GPG_ERR_BAD_SIGNATURE:
	return GPGME_SIG_STAT_BAD;
	case GPG_ERR_NO_PUBKEY:
	return GPGME_SIG_STAT_NOKEY;
	case GPG_ERR_NO_DATA:
	return GPGME_SIG_STAT_NOSIG;
	case GPG_ERR_SIG_EXPIRED:
	return GPGME_SIG_STAT_GOOD_EXP;
	case GPG_ERR_KEY_EXPIRED:
	return GPGME_SIG_STAT_GOOD_EXPKEY;
	default:
	return GPGME_SIG_STAT_ERROR;
	}
	}

	void SignedMessagePart::sigStatusToMetaData()
	{
	GpgME::Key key;
	if (partMetaData()->isSigned) {
	GpgME::Signature signature = mSignatures.front();
	mMetaData.status_code = signatureToStatus(signature);
	mMetaData.isGoodSignature = partMetaData()->status_code == GPGME_SIG_STAT_GOOD;
	// save extended signature status flags
	mMetaData.sigSummary = signature.summary();

	if (partMetaData()->isGoodSignature && !key.keyID()) {
	// Search for the key by its fingerprint so that we can check for
	// trust etc.
	key = Kleo::KeyCache::instance()->findByFingerprint(signature.fingerprint());
	if (key.isNull() && signature.fingerprint()) {
	// try to find a subkey that was used for signing;
	// assumes that the key ID is the last 16 characters of the fingerprint
	const auto fpr = std::string_view{signature.fingerprint()};
	const auto keyID = std::string{fpr, fpr.size() - 16, 16};
	const auto subkeys = Kleo::KeyCache::instance()->findSubkeysByKeyID({keyID});
	if (subkeys.size() > 0) {
	key = subkeys[0].parent();
	}
	}
	if (key.isNull()) {
	qCDebug(MIMETREEPARSER_CORE_LOG) << "Found no key or subkey for fingerprint" << signature.fingerprint();
	}
	}

	if (key.keyID()) {
	partMetaData()->keyId = key.keyID();
	}
	if (partMetaData()->keyId.isEmpty()) {
	partMetaData()->keyId = signature.fingerprint();
	}
	partMetaData()->keyTrust = signature.validity();
	if (key.numUserIDs() > 0 && key.userID(0).id()) {
	partMetaData()->signer = prettifyDN(key.userID(0).id());
	}
	for (const auto &uid : key.userIDs()) {
	// The following if /should/ always result in TRUE but we
	// won't trust implicitly the plugin that gave us these data.
	if (uid.email()) {
	QString email = QString::fromUtf8(uid.email());
	if (!email.isEmpty()) {
	partMetaData()->signerMailAddresses.append(email);
	}
	}
	}

	if (signature.creationTime()) {
	partMetaData()->creationTime.setSecsSinceEpoch(signature.creationTime());
	} else {
	partMetaData()->creationTime = QDateTime();
	}
	if (partMetaData()->signer.isEmpty()) {
	if (key.numUserIDs() > 0 && key.userID(0).name()) {
	partMetaData()->signer = prettifyDN(key.userID(0).name());
	}
	if (!partMetaData()->signerMailAddresses.empty()) {
	if (partMetaData()->signer.isEmpty()) {
	partMetaData()->signer = partMetaData()->signerMailAddresses.front();
	} else {
	partMetaData()->signer += QLatin1StringView(" <") + partMetaData()->signerMailAddresses.front() + QLatin1Char('>');
	}
	}
	}
	if (Kleo::DeVSCompliance::isCompliant()) {
	partMetaData()->isCompliant = signature.isDeVs();
	partMetaData()->compliance = Kleo::DeVSCompliance::name(signature.isDeVs());
	} else {
	partMetaData()->isCompliant = true;
	}
	}
	}

	void SignedMessagePart::setVerificationResult(const GpgME::VerificationResult &result, const QByteArray &signedData)
	{
	mSignatures = result.signatures();
	// FIXME
	// mMetaData.auditLogError = result.error;
	mMetaData.isSigned = !mSignatures.empty();
	if (mMetaData.isSigned) {
	sigStatusToMetaData();
	if (!signedData.isEmpty() && mParseAfterDecryption) {
	parseInternal(signedData);
	}
	}
	}

	QString SignedMessagePart::plaintextContent() const
	{
	if (!mNode) {
	return MessagePart::text();
	} else {
	return QString();
	}
	}

	QString SignedMessagePart::htmlContent() const
	{
	if (!mNode) {
	return MessagePart::text();
	} else {
	return QString();
	}
	}

	//-----CryptMessageBlock---------------------
	EncryptedMessagePart::EncryptedMessagePart(ObjectTreeParser *otp,
	const QString &text,
	const QGpgME::Protocol *cryptoProto,
	KMime::Content *node,
	KMime::Content *encryptedNode,
	bool parseAfterDecryption)
	: MessagePart(otp, text, node)
	, mParseAfterDecryption(parseAfterDecryption)
	, mPassphraseError(false)
	, mNoSecKey(false)
	, mDecryptMessage(false)
	, mCryptoProto(cryptoProto)
	, mEncryptedNode(encryptedNode)
	{
	mMetaData.isSigned = false;
	mMetaData.isGoodSignature = false;
	mMetaData.isEncrypted = false;
	mMetaData.isDecryptable = false;
	mMetaData.status = i18ndc("mimetreeparser", "@info:status", "Wrong Crypto Plug-In.");
	}

	void EncryptedMessagePart::setIsEncrypted(bool encrypted)
	{
	mMetaData.isEncrypted = encrypted;
	}

	bool EncryptedMessagePart::isEncrypted() const
	{
	return mMetaData.isEncrypted;
	}

	const QGpgME::Protocol *EncryptedMessagePart::cryptoProto() const
	{
	return mCryptoProto;
	}

	void EncryptedMessagePart::setDecryptMessage(bool decrypt)
	{
	mDecryptMessage = decrypt;
	}

	bool EncryptedMessagePart::decryptMessage() const
	{
	return mDecryptMessage;
	}

	bool EncryptedMessagePart::isDecryptable() const
	{
	return mMetaData.isDecryptable;
	}

	bool EncryptedMessagePart::isNoSecKey() const
	{
	return mNoSecKey;
	}

	bool EncryptedMessagePart::passphraseError() const
	{
	return mPassphraseError;
	}

	bool EncryptedMessagePart::decrypt(KMime::Content &data)
	{
	mError = NoError;
	mMetaData.errorText.clear();
	// FIXME
	// mMetaData.auditLogError = GpgME::Error();
	mMetaData.auditLog.clear();

	const QByteArray ciphertext = data.decodedContent();
	QByteArray plainText;
	auto job = mCryptoProto->decryptVerifyJob();
	const std::pair<GpgME::DecryptionResult, GpgME::VerificationResult> p = job->exec(ciphertext, plainText);
	job->deleteLater();
	auto decryptResult = p.first;
	auto verifyResult = p.second;
	mMetaData.isSigned = verifyResult.signatures().size() > 0;

	// Normalize CRLF's
	plainText = KMime::CRLFtoLF(plainText);
	auto codec = QStringDecoder(mOtp->codecNameFor(&data).constData());
	const auto decoded = codec.decode(plainText);

	partMetaData()->isSigned = verifyResult.signatures().size() > 0;

	if (partMetaData()->isSigned) {
	// We simply attach a signed message part to indicate that this content is also signed
	// We're forwarding mNode to not loose the encoding information
	auto subPart = SignedMessagePart::Ptr(new SignedMessagePart(mOtp, mCryptoProto, mNode, nullptr));
	subPart->setText(decoded);
	subPart->setVerificationResult(verifyResult, plainText);
	appendSubPart(subPart);
	}

	mDecryptRecipients.clear();
	bool cannotDecrypt = false;
	bool bDecryptionOk = !decryptResult.error();

	for (const auto &recipient : decryptResult.recipients()) {
	if (!recipient.status()) {
	bDecryptionOk = true;
	}
	GpgME::Key key;
	key = Kleo::KeyCache::instance()->findByKeyIDOrFingerprint(recipient.keyID());
	if (key.isNull()) {
	auto ret = Kleo::KeyCache::instance()->findSubkeysByKeyID({recipient.keyID()});
	if (ret.size() == 1) {
	key = ret.front().parent();
	}
	if (key.isNull()) {
	qCDebug(MIMETREEPARSER_CORE_LOG) << "Found no Key for KeyID " << recipient.keyID();
	}
	}
	mDecryptRecipients.emplace_back(recipient, key);
	}

	if (!bDecryptionOk && partMetaData()->isSigned) {
	// Only a signed part
	partMetaData()->isEncrypted = false;
	bDecryptionOk = true;
	mDecryptedData = plainText;
	} else {
	mPassphraseError = decryptResult.error().isCanceled() \|\| decryptResult.error().code() == GPG_ERR_BAD_PASSPHRASE;
	mMetaData.isEncrypted = bDecryptionOk \|\| decryptResult.error().code() != GPG_ERR_NO_DATA;

	if (decryptResult.error().isCanceled()) {
	setDecryptMessage(false);
	}

	partMetaData()->errorText = QString::fromLocal8Bit(decryptResult.error().asString());
	if (Kleo::DeVSCompliance::isCompliant()) {
	partMetaData()->isCompliant = decryptResult.isDeVs();
	partMetaData()->compliance = Kleo::DeVSCompliance::name(decryptResult.isDeVs());
	} else {
	partMetaData()->isCompliant = true;
	}
	if (partMetaData()->isEncrypted && decryptResult.numRecipients() > 0) {
	partMetaData()->keyId = decryptResult.recipient(0).keyID();
	}

	if (bDecryptionOk) {
	mDecryptedData = plainText;
	} else {
	mNoSecKey = true;
	const auto decryRecipients = decryptResult.recipients();
	for (const GpgME::DecryptionResult::Recipient &recipient : decryRecipients) {
	mNoSecKey &= (recipient.status().code() == GPG_ERR_NO_SECKEY);
	}
	if (!mPassphraseError && !mNoSecKey) { // GpgME do not detect passphrase error correctly
	mPassphraseError = true;
	}
	}
	}

	if (!bDecryptionOk) {
	QString cryptPlugLibName;
	mError = UnknownError;
	if (mCryptoProto) {
	cryptPlugLibName = mCryptoProto->name();
	}

	if (mNoSecKey) {
	mError = NoKeyError;
	}

	if (mPassphraseError) {
	mError = PassphraseError;
	}

	if (!mCryptoProto) {
	partMetaData()->errorText = i18n("No appropriate crypto plug-in was found.");
	} else if (cannotDecrypt) {
	partMetaData()->errorText = i18n("Crypto plug-in \"%1\" cannot decrypt messages.", cryptPlugLibName);
	} else if (!passphraseError()) {
	partMetaData()->errorText = i18n("Crypto plug-in \"%1\" could not decrypt the data.", cryptPlugLibName) + QLatin1StringView("<br />")
	+ i18n("Error: %1", partMetaData()->errorText);
	}
	}
	return bDecryptionOk;
	}

	void EncryptedMessagePart::startDecryption(KMime::Content *data)
	{
	mMetaData.isEncrypted = true;
	mMetaData.isDecryptable = decrypt(*data);

	if (mParseAfterDecryption && !mMetaData.isSigned) {
	parseInternal(mDecryptedData);
	} else {
	setText(QString::fromUtf8(mDecryptedData.constData()));
	}
	}

	void EncryptedMessagePart::startDecryption()
	{
	if (mEncryptedNode) {
	startDecryption(mEncryptedNode);
	} else {
	startDecryption(mNode);
	}
	}

	std::vector<std::pair<GpgME::DecryptionResult::Recipient, GpgME::Key>> EncryptedMessagePart::decryptRecipients() const
	{
	return mDecryptRecipients;
	}

	QString EncryptedMessagePart::plaintextContent() const
	{
	if (!mNode) {
	return MessagePart::text();
	} else {
	return QString();
	}
	}

	QString EncryptedMessagePart::htmlContent() const
	{
	if (!mNode) {
	return MessagePart::text();
	} else {
	return QString();
	}
	}

	QString EncryptedMessagePart::text() const
	{
	if (hasSubParts()) {
	auto _mp = (subParts()[0]).dynamicCast<SignedMessagePart>();
	if (_mp) {
	return _mp->text();
	}
	}

	return MessagePart::text();
	}

	EncapsulatedRfc822MessagePart::EncapsulatedRfc822MessagePart(ObjectTreeParser otp, KMime::Content node, const KMime::Message::Ptr &message)
	: MessagePart(otp, QString(), node)
	, mMessage(message)
	{
	mMetaData.isEncrypted = false;
	mMetaData.isSigned = false;
	mMetaData.isEncapsulatedRfc822Message = true;

	if (!mMessage) {
	qCWarning(MIMETREEPARSER_CORE_LOG) << "Node is of type message/rfc822 but doesn't have a message!";
	return;
	}

	parseInternal(message.data());
	}

	QString EncapsulatedRfc822MessagePart::text() const
	{
	return renderInternalText();
	}

	QString EncapsulatedRfc822MessagePart::from() const
	{
	if (auto from = mMessage->from(false)) {
	return from->asUnicodeString();
	}
	return {};
	}

	QDateTime EncapsulatedRfc822MessagePart::date() const
	{
	if (auto date = mMessage->date(false)) {
	return date->dateTime();
	}
	return {};
	}

	HeadersPart::HeadersPart(ObjectTreeParser otp, KMime::Content node)
	: MessagePart(otp, QString(), node)
	{
	}

	#include "moc_messagepart.cpp"

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