de.schlichtherle.key.passwd.swing.AesKeyStrengthPanel Maven / Gradle / Ivy

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TrueZIP is a Java based Virtual File System (VFS) to enable transparent, multi-threaded read/write access to archive files (ZIP, TAR etc.) as if they were directories. Archive files may be arbitrarily nested and the nesting level is only limited by heap and file system size.
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/*
 * Copyright (C) 2006-2010 Schlichtherle IT Services
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package de.schlichtherle.key.passwd.swing;

import de.schlichtherle.key.PromptingAesKeyProvider;
import de.schlichtherle.swing.EnhancedPanel;

import java.util.ResourceBundle;

import javax.swing.ComboBoxModel;
import javax.swing.DefaultComboBoxModel;

/**
 * A panel which allows the user to select the key strength for the AES cipher.
 *
 * @author Christian Schlichtherle
 * @since TrueZIP 6.0 (refactored from package de.schlichtherle.crypto.io.swing)
 * @version $Id$
 */
public class AesKeyStrengthPanel extends EnhancedPanel {
    
    private static final String CLASS_NAME
            = "de.schlichtherle.key.passwd.swing.AesKeyStrengthPanel";
    private static final ResourceBundle resources
            = ResourceBundle.getBundle(CLASS_NAME);

    static {
        // This check avoids a mapping function.
        assert 0 == PromptingAesKeyProvider.KEY_STRENGTH_128;
        assert 1 == PromptingAesKeyProvider.KEY_STRENGTH_192;
        assert 2 == PromptingAesKeyProvider.KEY_STRENGTH_256;
    }

    /**
     * Creates new form AesKeyStrengthPanel
     */
    public AesKeyStrengthPanel() {
        initComponents();
        keyStrength.setSelectedIndex(PromptingAesKeyProvider.KEY_STRENGTH_256);
    }

    private ComboBoxModel createModel() {
        return new DefaultComboBoxModel(
            new String[] {
                resources.getString("medium"),
                resources.getString("high"),
                resources.getString("ultra"),
            });
    }

    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    // //GEN-BEGIN:initComponents
    private void initComponents() {
        java.awt.GridBagConstraints gridBagConstraints;
        javax.swing.JLabel keyStrengthLong;

        keyStrengthLong = new javax.swing.JLabel();
        final javax.swing.JLabel keyStrengthShort = new javax.swing.JLabel();

        setLayout(new java.awt.GridBagLayout());

        keyStrength.setModel(createModel());
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 1;
        gridBagConstraints.gridy = 1;
        gridBagConstraints.anchor = java.awt.GridBagConstraints.WEST;
        gridBagConstraints.insets = new java.awt.Insets(5, 0, 0, 0);
        add(keyStrength, gridBagConstraints);

        keyStrengthLong.setLabelFor(keyStrength);
        keyStrengthLong.setText(resources.getString("prompt")); // NOI18N
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 0;
        gridBagConstraints.gridwidth = java.awt.GridBagConstraints.REMAINDER;
        gridBagConstraints.fill = java.awt.GridBagConstraints.HORIZONTAL;
        gridBagConstraints.weightx = 1.0;
        add(keyStrengthLong, gridBagConstraints);

        keyStrengthShort.setLabelFor(keyStrength);
        keyStrengthShort.setText(resources.getString("keyStrength")); // NOI18N
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 1;
        gridBagConstraints.fill = java.awt.GridBagConstraints.HORIZONTAL;
        gridBagConstraints.insets = new java.awt.Insets(5, 0, 0, 5);
        add(keyStrengthShort, gridBagConstraints);

    }// //GEN-END:initComponents
    
    /**
     * Getter for the metaData property .
     *
     * @return Value of property keyStrength.
     */
    public int getKeyStrength() {
        final int ks = keyStrength.getSelectedIndex();
        assert ks == PromptingAesKeyProvider.KEY_STRENGTH_128
                || ks == PromptingAesKeyProvider.KEY_STRENGTH_192
                || ks == PromptingAesKeyProvider.KEY_STRENGTH_256;
        return ks;
    }
    
    /**
     * Setter for property keyStrength.
     *
     * @param keyStrength One of
     *        {@code PromptingAesKeyProvider.KEY_STRENGTH_128},
     *        {@code PromptingAesKeyProvider.KEY_STRENGTH_192} or
     *        {@code PromptingAesKeyProvider.KEY_STRENGTH_256}.
     *
     * @throws IllegalArgumentException If the preconditions for the parameter
     *         do not hold.
     */
    public void setKeyStrength(int keyStrength) {
        if (keyStrength != PromptingAesKeyProvider.KEY_STRENGTH_128
                && keyStrength != PromptingAesKeyProvider.KEY_STRENGTH_192
                && keyStrength != PromptingAesKeyProvider.KEY_STRENGTH_256)
            throw new IllegalArgumentException();
        this.keyStrength.setSelectedIndex(keyStrength);
    }
    
    // Variables declaration - do not modify//GEN-BEGIN:variables
    private final javax.swing.JComboBox keyStrength = new javax.swing.JComboBox();
    // End of variables declaration//GEN-END:variables

}