kgpgtextedit.cpp

Go to the documentation of this file.

/*
 * Copyright (C) 2002 Jean-Baptiste Mardelle <bj@altern.org>
 * Copyright (C) 2009,2010,2011 Rolf Eike Beer <kde@opensource.sf-tec.de>
 */

/***************************************************************************
 *                                                                         *
 *   This program 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.                                   *
 *                                                                         *
 ***************************************************************************/

#include "kgpgtextedit.h"

#include "selectsecretkey.h"
#include "kgpgsettings.h"
#include "keyservers.h"
#include "selectpublickeydialog.h"
#include "detailedconsole.h"
#include "keysmanager.h"
#include "editor/kgpgeditor.h"
#include "transactions/kgpgdecrypt.h"
#include "transactions/kgpgencrypt.h"
#include "transactions/kgpgimport.h"
#include "transactions/kgpgsigntext.h"
#include "transactions/kgpgverify.h"

#include <KLocale>
#include <KMessageBox>
#include <QDragEnterEvent>
#include <QDropEvent>
#include <QFile>
#include <QTextCodec>
#include <QTextStream>
#include <kio/netaccess.h>

#define SIGNEDMESSAGE_BEGIN  QLatin1String( "-----BEGIN PGP SIGNED MESSAGE-----" )
#define SIGNEDMESSAGE_END    QLatin1String( "-----END PGP SIGNATURE-----" )

KgpgTextEdit::KgpgTextEdit(QWidget *parent, KGpgItemModel *model, KeysManager *manager)
            : KTextEdit(parent),
            m_posstart(-1),
            m_posend(-1),
            m_model(model),
            m_keysmanager(manager)
{
    setCheckSpellingEnabled(true);
    setAcceptDrops(true);
    setReadOnly(false);
    setUndoRedoEnabled(true);
}

KgpgTextEdit::~KgpgTextEdit()
{
}

void KgpgTextEdit::dragEnterEvent(QDragEnterEvent *e)
{
    // if a file is dragged into editor ...
    if (KUrl::List::canDecode(e->mimeData()) || e->mimeData()->hasText())
        e->acceptProposedAction();
}

void KgpgTextEdit::dropEvent(QDropEvent *e)
{
    // decode dropped file or dropped text
    KUrl::List uriList = KUrl::List::fromMimeData(e->mimeData());
    if (!uriList.isEmpty())
        slotDroppedFile(uriList.first());
    else
    if (e->mimeData()->hasText())
        insertPlainText(e->mimeData()->text());
}

void KgpgTextEdit::slotDroppedFile(const KUrl &url)
{
    openDroppedFile(url, true);
}

void KgpgTextEdit::openDroppedFile(const KUrl& url, const bool probe)
{
    KUrl tmpurl;

    if (url.isLocalFile()) {
        m_tempfile = url.path();
        tmpurl = url;
    } else {
        if (KMessageBox::warningContinueCancel(this, i18n("<qt><b>Remote file dropped</b>.<br />The remote file will now be copied to a temporary file to process requested operation. This temporary file will be deleted after operation.</qt>"), QString(), KStandardGuiItem::cont(), KStandardGuiItem::cancel(), QLatin1String( "RemoteFileWarning" )) != KMessageBox::Continue)
            return;

        if (!KIO::NetAccess::download(url, m_tempfile, this)) {
            KMessageBox::sorry(this, i18n("Could not download file."));
            return;
        }
        tmpurl = KUrl::fromPath(m_tempfile);
    }

    QString result;

    QFile qfile(m_tempfile);
    if (qfile.open(QIODevice::ReadOnly)) {
        QTextStream t(&qfile);
        result = t.readAll();
        qfile.close();
    }

    if (result.isEmpty())
        return;

    if (!probe || KGpgDecrypt::isEncryptedText(result, &m_posstart, &m_posend)) {
        // if pgp data found, decode it
        KGpgDecrypt *decr = new KGpgDecrypt(this, KUrl::List(tmpurl));
        connect(decr, SIGNAL(done(int)), SLOT(slotDecryptDone(int)));
        decr->start();
        return;
    }
    // remove only here, as KGpgDecrypt will use and remove the file itself
    KIO::NetAccess::removeTempFile(m_tempfile);
    m_tempfile.clear();

    QString tmpinfo;

    switch (KGpgImport::isKey(result)) {
    case 1:
        tmpinfo = i18n("<qt>This file is a <b>public</b> key.<br />Do you want to import it instead of opening it in editor?</qt>");
        break;
    case 2:
        tmpinfo = i18n("<qt>This file is a <b>private</b> key.<br />Do you want to import it instead of opening it in editor?</qt>");
        break;
        }

    if (!tmpinfo.isEmpty()) {
        if (KMessageBox::questionYesNo(this, tmpinfo, i18n("Key file dropped on Editor")) != KMessageBox::Yes) {
            setPlainText(result);
        } else {
            KGpgImport *imp = new KGpgImport(this, result);
            connect(imp, SIGNAL(done(int)), m_keysmanager, SLOT(slotImportDone(int)));
            imp->start();
        }
    } else {
        if (m_posstart != -1) {
            Q_ASSERT(m_posend != -1);
            QString fullcontent = toPlainText();
            fullcontent.replace(m_posstart, m_posend - m_posstart, result);
            setPlainText(fullcontent);
            m_posstart = -1;
            m_posend = -1;
        } else {
            setPlainText(result);
        }
    }
}

void KgpgTextEdit::slotEncode()
{
    QPointer<KgpgSelectPublicKeyDlg> dialog = new KgpgSelectPublicKeyDlg(this, m_model, m_keysmanager->goDefaultShortcut(), true);
    if (dialog->exec() == KDialog::Accepted) {
        QStringList options;
        KGpgEncrypt::EncryptOptions opts = KGpgEncrypt::DefaultEncryption;

        if (dialog->getArmor())
            opts |= KGpgEncrypt::AsciiArmored;

        if (dialog->getUntrusted())
            opts |= KGpgEncrypt::AllowUntrustedEncryption;

        if (dialog->getHideId())
            opts |= KGpgEncrypt::HideKeyId;

        if (KGpgSettings::allowCustomEncryptionOptions()) {
            const QString customoptions = dialog->getCustomOptions();
            if (!customoptions.isEmpty())
                options << customoptions.split(QLatin1Char(' '), QString::SkipEmptyParts);
        }

        if (KGpgSettings::pgpCompatibility())
            options << QLatin1String( "--pgp6" );

        QStringList listkeys;
        if (!dialog->getSymmetric())
            listkeys = dialog->selectedKeys();

        KGpgEncrypt *encr = new KGpgEncrypt(this, listkeys, toPlainText(), opts, options);
        encr->start();
        connect(encr, SIGNAL(done(int)), SLOT(slotEncodeUpdate(int)));
    }
    delete dialog;
}

void KgpgTextEdit::slotDecode()
{
    const QString fullcontent = toPlainText();

    if (!KGpgDecrypt::isEncryptedText(fullcontent, &m_posstart, &m_posend))
        return;

    KGpgDecrypt *decr = new KGpgDecrypt(this, fullcontent.mid(m_posstart, m_posend - m_posstart));
    connect(decr, SIGNAL(done(int)), SLOT(slotDecryptDone(int)));
    decr->start();
}

void KgpgTextEdit::slotSign(const QString &message)
{
    QString signkeyid;

    QPointer<KgpgSelectSecretKey> opts = new KgpgSelectSecretKey(this, m_model);
    if (opts->exec() == QDialog::Accepted)
        signkeyid = opts->getKeyID();
    else
    {
        delete opts;
        return;
    }

    delete opts;

    KGpgSignText *signt = new KGpgSignText(this, signkeyid, message);
    connect(signt, SIGNAL(done(int)), SLOT(slotSignUpdate(int)));
    signt->start();
}

void KgpgTextEdit::slotVerify(const QString &message)
{
    const QString startmsg(SIGNEDMESSAGE_BEGIN);
    const QString endmsg(SIGNEDMESSAGE_END);

    int posstart = message.indexOf(startmsg);
    if (posstart == -1)
        return;

    int posend = message.indexOf(endmsg, posstart);
    if (posend == -1)
        return;
    posend += endmsg.length();

    KGpgVerify *verify = new KGpgVerify(this, message.mid(posstart, posend - posstart));
    connect(verify, SIGNAL(done(int)), SLOT(slotVerifyDone(int)));
    verify->start();
}

void KgpgTextEdit::slotDecryptDone(int result)
{
    KGpgDecrypt *decr = qobject_cast<KGpgDecrypt *>(sender());
    Q_ASSERT(decr != NULL);

    if (!m_tempfile.isEmpty()) {
        KIO::NetAccess::removeTempFile(m_tempfile);
        m_tempfile.clear();
    }

    if (result == KGpgTransaction::TS_OK) {
        // FIXME choose codec
        setPlainText(decr->decryptedText().join(QLatin1String("\n")) + QLatin1Char('\n'));
    } else if (result != KGpgTransaction::TS_USER_ABORTED) {
        KMessageBox::detailedSorry(this, i18n("Decryption failed."), decr->getMessages().join( QLatin1String( "\n" )));
    }

    decr->deleteLater();
}

void KgpgTextEdit::slotEncodeUpdate(int result)
{
    KGpgEncrypt *enc = qobject_cast<KGpgEncrypt *>(sender());
    Q_ASSERT(enc != NULL);

    if (result == KGpgTransaction::TS_OK) {
        const QString lf = QLatin1String("\n");
        setPlainText(enc->encryptedText().join(lf) + lf);
    } else {
        KMessageBox::sorry(this, i18n("The encryption failed with error code %1", result),
                i18n("Encryption failed."));
    }

    sender()->deleteLater();
}

void KgpgTextEdit::slotSignUpdate(int result)
{
    const KGpgSignText * const signt = qobject_cast<KGpgSignText *>(sender());
    sender()->deleteLater();
    Q_ASSERT(signt != NULL);

    if (result != KGpgTransaction::TS_OK) {
        KMessageBox::sorry(this, i18n("Signing not possible: bad passphrase or missing key"));
        return;
    }

    const QString content = signt->signedText().join(QLatin1String("\n")) + QLatin1String("\n");

    setPlainText(content);
    emit resetEncoding(false);
}

void KgpgTextEdit::slotVerifyDone(int result)
{
    const KGpgVerify * const verify = qobject_cast<KGpgVerify *>(sender());
    sender()->deleteLater();
    Q_ASSERT(verify != NULL);

    emit verifyFinished();

    if (result == KGpgVerify::TS_MISSING_KEY) {
        verifyKeyNeeded(verify->missingId());
        return;
    }

    const QStringList messages = verify->getMessages();

    if (messages.isEmpty())
        return;

    QStringList msglist;
    foreach (QString rawmsg, messages) // krazy:exclude=foreach
        msglist << rawmsg.replace(QLatin1Char('<'), QLatin1String("&lt;"));

    (void) new KgpgDetailedInfo(this, KGpgVerify::getReport(messages, m_model),
            msglist.join(QLatin1String("<br/>")),
            QStringList(), i18nc("Caption of message box", "Verification Finished"));
}

void KgpgTextEdit::verifyKeyNeeded(const QString &id)
{
    KGuiItem importitem = KStandardGuiItem::yes();
    importitem.setText(i18n("&Import"));
    importitem.setToolTip(i18n("Import key in your list"));

    KGuiItem noimportitem = KStandardGuiItem::no();
    noimportitem.setText(i18n("Do &Not Import"));
    noimportitem.setToolTip(i18n("Will not import this key in your list"));

    if (KMessageBox::questionYesNo(this, i18n("<qt><b>Missing signature:</b><br />Key id: %1<br /><br />Do you want to import this key from a keyserver?</qt>", id), i18n("Missing Key"), importitem, noimportitem) == KMessageBox::Yes)
    {
        KeyServer *kser = new KeyServer(0, m_model, true);
        kser->slotSetText(id);
        kser->slotImport();
    }
}

void KgpgTextEdit::slotSignVerify()
{
    signVerifyText(toPlainText());
}

void KgpgTextEdit::signVerifyText(const QString &message)
{
    if (message.contains(SIGNEDMESSAGE_BEGIN))
        slotVerify(message);
    else
        slotSign(message);
}

void KgpgTextEdit::slotHighlightText(const QString &, const int matchingindex, const int matchedlength)
{
    highlightWord(matchedlength, matchingindex);
}

#include "kgpgtextedit.moc"