/* CertWarningPane.java
   Copyright (C) 2012 Red Hat, Inc.

This file is part of IcedTea.

IcedTea 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, version 2.

IcedTea 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
IcedTea; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA.

Linking this library statically or dynamically with other modules is making a
combined work based on this library. Thus, the terms and conditions of the GNU
General Public License cover the whole combination.

As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent modules, and
to copy and distribute the resulting executable under terms of your choice,
provided that you also meet, for each linked independent module, the terms and
conditions of the license of that module. An independent module is a module
which is not derived from or based on this library. If you modify this library,
you may extend this exception to your version of the library, but you are not
obligated to do so. If you do not wish to do so, delete this exception
statement from your version.
*/

package net.adoptopenjdk.icedteaweb.client.parts.dialogs.security;

import net.adoptopenjdk.icedteaweb.IcedTeaWebConstants;
import net.adoptopenjdk.icedteaweb.jdk89access.SunMiscLauncher;
import net.adoptopenjdk.icedteaweb.logging.Logger;
import net.adoptopenjdk.icedteaweb.logging.LoggerFactory;
import net.adoptopenjdk.icedteaweb.ui.swing.dialogresults.DialogResult;
import net.adoptopenjdk.icedteaweb.ui.swing.dialogresults.YesNoSandbox;
import net.sourceforge.jnlp.JNLPFile;
import net.sourceforge.jnlp.runtime.classloader.SecurityDelegate;
import net.sourceforge.jnlp.security.AccessType;
import net.sourceforge.jnlp.security.CertVerifier;
import net.sourceforge.jnlp.security.CertificateUtils;
import net.sourceforge.jnlp.security.HttpsCertVerifier;
import net.sourceforge.jnlp.security.KeyStores;
import net.sourceforge.jnlp.security.KeyStores.Level;
import net.sourceforge.jnlp.security.KeyStores.Type;
import net.sourceforge.jnlp.security.SecurityUtil;
import net.sourceforge.jnlp.util.RestrictedFileUtils;

import javax.swing.BorderFactory;
import javax.swing.BoxLayout;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingConstants;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.security.KeyStore;
import java.security.cert.Certificate;
import java.security.cert.X509Certificate;

import static net.adoptopenjdk.icedteaweb.i18n.Translator.R;

/**
 * Provides the panel for using inside a SecurityDialog. These dialogs are
 * used to warn the user when either signed code (with or without signing
 * issues) is going to be run, or when service permission (file, clipboard,
 * printer, etc) is needed with unsigned code.
 *
 * @author <a href="mailto:jsumali@redhat.com">Joshua Sumali</a>
 */
public class CertWarningPane extends SecurityDialogPanel {

    private final static Logger LOG = LoggerFactory.getLogger(CertWarningPane.class);

    private final JNLPFile file;
    private final AccessType accessType;
    private final Certificate cert;
    private JCheckBox alwaysTrust;
    private final CertVerifier certVerifier;
    private final SecurityDelegate securityDelegate;
    private JPanel topPanel, infoPanel, buttonPanel, bottomPanel;
    private JLabel topLabel, nameLabel, publisherLabel, fromLabel, bottomLabel;
    private JButton run, sandbox, advancedOptions, cancel, moreInfo;
    private boolean alwaysTrustSelected;
    private String bottomLabelWarningText;

    public CertWarningPane(SecurityDialog x, CertVerifier certVerifier, SecurityDelegate securityDelegate) {
        super(x, certVerifier);
        this.certVerifier = certVerifier;
        this.securityDelegate = securityDelegate;

        this.accessType = parent.getAccessType();
        this.file = parent.getFile();
        this.cert = parent.getCertVerifier().getPublisher(null);

        addComponents();
    }

    /**
     * Creates the actual GUI components, and adds it to this panel
     */
    private void addComponents() {
        setTextAndLabels();
        addButtons();
    }

    private void setTextAndLabels() {
        String name = "";
        String publisher = "";
        String from = "";

        //We don't worry about exceptions when trying to fill in
        //these strings -- we just want to fill in as many as possible.
        try {
            if ((certVerifier instanceof HttpsCertVerifier) &&
                    (cert instanceof X509Certificate)) {
                name = SecurityUtil.getCN(((X509Certificate) cert)
                                        .getSubjectX500Principal().getName());
            } else {
                name = file.getInformation().getTitle();
            }
        } catch (Exception e) {
        }

        try {
            if (cert instanceof X509Certificate) {
                publisher = SecurityUtil.getCN(((X509Certificate) cert)
                                        .getSubjectX500Principal().getName());
            }
        } catch (Exception e) {
        }

        try {
            from = file.getInformation().getHomepage().toString();
        } catch (Exception e) {
        }

        // Labels
        String topLabelText = "";
        bottomLabelWarningText = parent.getCertVerifier().getRootInCaCerts() ?
                R("STrustedSource") : R("SUntrustedSource");
        String iconLocation = "net/sourceforge/jnlp/resources/";
        alwaysTrustSelected = false;
        if (certVerifier instanceof HttpsCertVerifier) {
            // HTTPS certs that are verified do not prompt for a dialog.
            // @see VariableX509TrustManager#checkServerTrusted
            topLabelText = R("SHttpsUnverified") + " " + R("Continue");
            iconLocation += "warning.png";
        } else {
            switch (accessType) {
                case VERIFIED:
                    topLabelText = R("SSigVerified");
                    iconLocation += "question.png";
                    alwaysTrustSelected = true;
                    break;
                case UNVERIFIED:
                    topLabelText = R("SSigUnverified");
                    iconLocation += "warning.png";
                    bottomLabelWarningText += " " + R("SWarnFullPermissionsIgnorePolicy");
                    break;
                case SIGNING_ERROR:
                    topLabelText = R("SSignatureError");
                    iconLocation += "warning.png";
                    bottomLabelWarningText += " " + R("SWarnFullPermissionsIgnorePolicy");
                    break;
            }
        }
        ImageIcon icon = getImageIcon(iconLocation);
        topLabel = new JLabel(htmlWrap(topLabelText), icon, SwingConstants.LEFT);
        topLabel.setFont(new Font(topLabel.getFont().toString(),
                                Font.BOLD, 12));
        topPanel = new JPanel(new BorderLayout());
        topPanel.add(topLabel, BorderLayout.CENTER);
        topPanel.setPreferredSize(new Dimension(400, 75));
        topPanel.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));

        //application info
        nameLabel = new JLabel(R("Name") + ":   " + name);
        nameLabel.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
        publisherLabel = new JLabel(R("Publisher") + ": " + publisher);
        publisherLabel.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
        fromLabel = new JLabel(R("From") + ":   " + from);
        fromLabel.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
    }

    private ImageIcon getImageIcon(final String imageLocation) {
        return SunMiscLauncher.getSecureImageIcon(imageLocation);
    }

    private void addButtons() {
        alwaysTrust = new JCheckBox(R("SAlwaysTrustPublisher"));
        alwaysTrust.setEnabled(true);
        alwaysTrust.setSelected(alwaysTrustSelected);

        infoPanel = new JPanel(new GridLayout(4, 1));
        infoPanel.add(nameLabel);
        infoPanel.add(publisherLabel);

        final boolean isHttpsCertTrustDialog = certVerifier instanceof HttpsCertVerifier;
        if (!isHttpsCertTrustDialog) {
            infoPanel.add(fromLabel);
        }

        infoPanel.add(alwaysTrust);
        infoPanel.setBorder(BorderFactory.createEmptyBorder(25, 25, 25, 25));

        //run and cancel buttons
        buttonPanel = new JPanel(new FlowLayout(FlowLayout.RIGHT));
        run = new JButton();
        if (isHttpsCertTrustDialog) {
            run.setText(R("ButYes"));
        } else {
            run.setText(R("ButRun"));
        }
        sandbox = new JButton(R("ButSandbox"));
        advancedOptions = new TemporaryPermissionsButton(file, securityDelegate, sandbox);

        cancel = new JButton();
        if (isHttpsCertTrustDialog) {
            cancel.setText(R("ButNo"));
        } else {
            cancel.setText(R("ButCancel"));
        }

        if (isHttpsCertTrustDialog) {
            run.setToolTipText(R("CertWarnHTTPSAcceptTip"));
        } else {
            run.setToolTipText(R("CertWarnRunTip"));
        }
        sandbox.setToolTipText(R("CertWarnSandboxTip"));
        advancedOptions.setToolTipText(R("CertWarnPolicyTip"));
        if (isHttpsCertTrustDialog) {
            cancel.setToolTipText(R("CertWarnHTTPSRejectTip"));
        } else {
            cancel.setToolTipText(R("CertWarnCancelTip"));
        }

        alwaysTrust.addActionListener(new ButtonDisableListener(sandbox));

        sandbox.setEnabled(!alwaysTrust.isSelected());

        run.addActionListener(SetValueHandler.createSetValueListener(parent, YesNoSandbox.yes()));
        run.addActionListener(new CheckBoxListener());

        sandbox.addActionListener(SetValueHandler.createSetValueListener(parent, YesNoSandbox.sandbox()));

        cancel.addActionListener(SetValueHandler.createSetValueListener(parent, YesNoSandbox.no()));

        initialFocusComponent = cancel;
        buttonPanel.add(run);
        // Only iff this dialog is being invoked by VariableX509TrustManager.
        // In this case, the "sandbox" button and temporary permissions do not make any sense,
        // as we are asking the user if they trust some certificate that is not being used to sign an app
        // (eg "do you trust this certificate presented for the HTTPS connection to the applet's host site")
        // Since this dialog isn't talking about an applet/application, there is nothing to run sandboxed.
        if (!isHttpsCertTrustDialog) {
            buttonPanel.add(sandbox);
            buttonPanel.add(advancedOptions);
        }
        buttonPanel.add(cancel);

        buttonPanel.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));

        //all of the above
        setLayout(new BoxLayout(this, BoxLayout.Y_AXIS));
        add(topPanel);
        add(infoPanel);
        add(buttonPanel);

        bottomLabel = new JLabel(htmlWrap(bottomLabelWarningText));
        moreInfo = new JButton(R("ButMoreInformation"));
        moreInfo.addActionListener(new MoreInfoButtonListener());

        bottomPanel = new JPanel();
        bottomPanel.setLayout(new BoxLayout(bottomPanel, BoxLayout.X_AXIS));
        bottomPanel.add(bottomLabel);
        bottomPanel.add(moreInfo);
        bottomPanel.setPreferredSize(new Dimension(600, 100));
        bottomPanel.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
        add(bottomPanel);
    }

    private class MoreInfoButtonListener implements ActionListener {
        @Override
        public void actionPerformed(ActionEvent e) {
            SecurityDialog.showMoreInfoDialog(parent.getCertVerifier(),
                                parent);
        }
    }

    /**
     * Disable the Sandbox button when the AlwaysTrust checkbox is checked
     */
    private class ButtonDisableListener implements ActionListener {
        private final JButton button;

        public ButtonDisableListener(JButton button) {
            this.button = button;
        }

        @Override
        public void actionPerformed(ActionEvent e) {
            button.setEnabled(!alwaysTrust.isSelected());
        }
    }

    /**
     * Updates the user's KeyStore of trusted Certificates.
     */
    private class CheckBoxListener implements ActionListener {
        @Override
        public void actionPerformed(ActionEvent e) {
            if (alwaysTrust != null && alwaysTrust.isSelected()) {
                saveCert();
            }
        }
    }

    public void saveCert() {
        try {
            KeyStore ks = KeyStores.getKeyStore(Level.USER, Type.CERTS).getKs();
            X509Certificate c = (X509Certificate) parent.getCertVerifier().getPublisher(null);
            CertificateUtils.addToKeyStore(c, ks);
            File keyStoreFile = KeyStores.getKeyStoreLocation(Level.USER, Type.CERTS).getFile();
            if (!keyStoreFile.isFile()) {
                RestrictedFileUtils.createRestrictedFile(keyStoreFile);
            }
            SecurityUtil.storeKeyStore(ks, keyStoreFile);
            LOG.debug("certificate is now permanently trusted");
        } catch (Exception ex) {
                    // TODO: Let NetX show a dialog here notifying user
            // about being unable to add cert to keystore
            LOG.error(IcedTeaWebConstants.DEFAULT_ERROR_MESSAGE, ex);
        }
    }

    @Override
    public DialogResult getDefaultNegativeAnswer() {
        return YesNoSandbox.sandbox();
    }

    @Override
    public DialogResult getDefaultPositiveAnswer() {
        return YesNoSandbox.yes();
    }

    @Override
    public DialogResult readFromStdIn(String what) {
        return YesNoSandbox.readValue(what);
    }
    @Override
    public String helpToStdIn() {
        return YesNoSandbox.sandbox().getAllowedValues().toString();
    }

}
