Moar UI work on the Java app + support for per-site algorithm versioning.

MasterPassword/Java/masterpassword-algorithm/src/main/java/com/lyndir/masterpassword/MasterKey.java

@@ -28,6 +28,7 @@ public abstract class MasterKey {
         return create( Version.CURRENT, fullName, masterPassword );
     }
 
+    @Nonnull
     public static MasterKey create(Version version, final String fullName, final String masterPassword) {
 
         switch (version) {
@@ -75,6 +76,10 @@ public abstract class MasterKey {
     public abstract String encode(final String siteName, final MPSiteType siteType, int siteCounter, final MPSiteVariant siteVariant,
                                   @Nullable final String siteContext);
 
+    public boolean isValid() {
+        return masterKey != null;
+    }
+
     public void invalidate() {
 
         if (masterKey != null) {

MasterPassword/Java/masterpassword-algorithm/src/main/java/com/lyndir/masterpassword/MasterKeyV0.java

@@ -100,13 +100,13 @@ public class MasterKeyV0 extends MasterKey {
         logger.trc( "sitePasswordSeed ID: %s", CodeUtils.encodeHex( idForBytes( sitePasswordSeed ) ) );
 
         Preconditions.checkState( sitePasswordSeed.length > 0 );
-        int templateIndex = sitePasswordSeed[0];
+        int templateIndex = sitePasswordSeed[0] & 0xFFFF;
         MPTemplate template = siteType.getTemplateAtRollingIndex( templateIndex );
         logger.trc( "type %s, template: %s", siteType, template.getTemplateString() );
 
         StringBuilder password = new StringBuilder( template.length() );
         for (int i = 0; i < template.length(); ++i) {
-            int characterIndex = sitePasswordSeed[i + 1];
+            int characterIndex = sitePasswordSeed[i + 1] & 0xFFFF;
             MPTemplateCharacterClass characterClass = template.getCharacterClassAtIndex( i );
             char passwordCharacter = characterClass.getCharacterAtRollingIndex( characterIndex );
             logger.trc( "class %c, index %d (0x%02X) -> character: %c", characterClass.getIdentifier(), characterIndex,

MasterPassword/Java/masterpassword-algorithm/src/main/java/com/lyndir/masterpassword/MasterKeyV2.java

@@ -13,7 +13,7 @@ import javax.annotation.Nullable;
  * 
  * @author lhunath, 2014-08-30
  */
-public class MasterKeyV2 extends MasterKeyV0 {
+public class MasterKeyV2 extends MasterKeyV1 {
 
     @SuppressWarnings("UnusedDeclaration")
     private static final Logger logger = Logger.get( MasterKeyV2.class );

MasterPassword/Java/masterpassword-algorithm/src/main/java/com/lyndir/masterpassword/MasterKeyV3.java

@@ -14,7 +14,7 @@ import javax.annotation.Nullable;
  * 
  * @author lhunath, 2014-08-30
  */
-public class MasterKeyV3 extends MasterKeyV0 {
+public class MasterKeyV3 extends MasterKeyV2 {
 
     @SuppressWarnings("UnusedDeclaration")
     private static final Logger logger = Logger.get( MasterKeyV3.class );

MasterPassword/Java/masterpassword-gui/src/main/java/com/lyndir/masterpassword/gui/AuthenticationPanel.java

@@ -1,6 +1,7 @@
 package com.lyndir.masterpassword.gui;
 
 import com.google.common.collect.ImmutableList;
+import com.lyndir.masterpassword.util.Components;
 import java.awt.*;
 import javax.swing.*;
 
@@ -8,12 +9,13 @@ import javax.swing.*;
 /**
  * @author lhunath, 2014-06-11
  */
-public abstract class AuthenticationPanel extends JPanel {
+public abstract class AuthenticationPanel extends Components.GradientPanel {
 
     protected final UnlockFrame unlockFrame;
     protected final JLabel      avatarLabel;
 
     public AuthenticationPanel(final UnlockFrame unlockFrame) {
+        super( null, null );
         this.unlockFrame = unlockFrame;
 
         setLayout( new BoxLayout( this, BoxLayout.PAGE_AXIS ) );

MasterPassword/Java/masterpassword-gui/src/main/java/com/lyndir/masterpassword/gui/GUI.java

@@ -94,7 +94,7 @@ public class GUI implements UnlockFrame.SignInCallback {
 
     @Override
     public boolean signedIn(final User user) {
-        if (!user.hasKey())
+        if (!user.isKeyAvailable())
             return false;
         try {
             user.getKey();

MasterPassword/Java/masterpassword-gui/src/main/java/com/lyndir/masterpassword/gui/IncognitoAuthenticationPanel.java

@@ -24,14 +24,10 @@ public class IncognitoAuthenticationPanel extends AuthenticationPanel implements
         add( Components.stud() );
 
         JLabel fullNameLabel = Components.label( "Full Name:" );
-        fullNameLabel.setAlignmentX( LEFT_ALIGNMENT );
-        fullNameLabel.setHorizontalAlignment( SwingConstants.CENTER );
-        fullNameLabel.setVerticalAlignment( SwingConstants.BOTTOM );
         add( fullNameLabel );
 
         fullNameField = Components.textField();
         fullNameField.setFont( Res.valueFont().deriveFont( 12f ) );
-        fullNameField.setAlignmentX( LEFT_ALIGNMENT );
         fullNameField.getDocument().addDocumentListener( this );
         fullNameField.addActionListener( this );
         add( fullNameField );
@@ -39,13 +35,9 @@ public class IncognitoAuthenticationPanel extends AuthenticationPanel implements
 
         // Master Password
         JLabel masterPasswordLabel = Components.label( "Master Password:" );
-        masterPasswordLabel.setAlignmentX( LEFT_ALIGNMENT );
-        masterPasswordLabel.setHorizontalAlignment( SwingConstants.CENTER );
-        masterPasswordLabel.setVerticalAlignment( SwingConstants.BOTTOM );
         add( masterPasswordLabel );
 
         masterPasswordField = Components.passwordField();
-        masterPasswordField.setAlignmentX( LEFT_ALIGNMENT );
         masterPasswordField.addActionListener( this );
         masterPasswordField.getDocument().addDocumentListener( this );
         add( masterPasswordField );

MasterPassword/Java/masterpassword-gui/src/main/java/com/lyndir/masterpassword/gui/IncognitoSite.java

@@ -1,6 +1,7 @@
 package com.lyndir.masterpassword.gui;
 
 import com.lyndir.masterpassword.MPSiteType;
+import com.lyndir.masterpassword.MasterKey;
 
 
 /**
@@ -8,14 +9,17 @@ import com.lyndir.masterpassword.MPSiteType;
  */
 public class IncognitoSite extends Site {
 
-    private String     siteName;
+    private String            siteName;
-    private MPSiteType siteType;
+    private MPSiteType        siteType;
-    private int        siteCounter;
+    private int               siteCounter;
+    private MasterKey.Version algorithmVersion;
 
-    public IncognitoSite(final String siteName, final MPSiteType siteType, final int siteCounter) {
+    public IncognitoSite(final String siteName, final MPSiteType siteType, final int siteCounter,
+                         final MasterKey.Version algorithmVersion) {
         this.siteName = siteName;
         this.siteType = siteType;
         this.siteCounter = siteCounter;
+        this.algorithmVersion = algorithmVersion;
     }
 
     public String getSiteName() {
@@ -34,6 +38,16 @@ public class IncognitoSite extends Site {
         this.siteType = siteType;
     }
 
+    @Override
+    public MasterKey.Version getAlgorithmVersion() {
+        return algorithmVersion;
+    }
+
+    @Override
+    public void setAlgorithmVersion(final MasterKey.Version algorithmVersion) {
+        this.algorithmVersion = algorithmVersion;
+    }
+
     public int getSiteCounter() {
         return siteCounter;
     }

MasterPassword/Java/masterpassword-gui/src/main/java/com/lyndir/masterpassword/gui/IncognitoUser.java

@@ -9,8 +9,9 @@ import com.lyndir.masterpassword.MasterKey;
  */
 public class IncognitoUser extends User {
 
-    private final String fullName;
+    private final String            fullName;
-    private final String masterPassword;
+    private final String            masterPassword;
+    private       MasterKey.Version algorithmVersion;
 
     public IncognitoUser(final String fullName, final String masterPassword) {
         this.fullName = fullName;
@@ -28,7 +29,12 @@ public class IncognitoUser extends User {
 
     @Override
     public MasterKey.Version getAlgorithmVersion() {
-        return MasterKey.Version.CURRENT;
+        return algorithmVersion;
+    }
+
+    @Override
+    public void setAlgorithmVersion(final MasterKey.Version algorithmVersion) {
+        this.algorithmVersion = algorithmVersion;
     }
 
     @Override

MasterPassword/Java/masterpassword-gui/src/main/java/com/lyndir/masterpassword/gui/ModelAuthenticationPanel.java

@@ -44,19 +44,10 @@ public class ModelAuthenticationPanel extends AuthenticationPanel implements Ite
 
         // User
         JLabel userLabel = Components.label( "User:" );
-        userLabel.setAlignmentX( LEFT_ALIGNMENT );
-        userLabel.setHorizontalAlignment( SwingConstants.CENTER );
-        userLabel.setVerticalAlignment( SwingConstants.BOTTOM );
         add( userLabel );
 
-        userField = new JComboBox<ModelUser>( new DefaultComboBoxModel<>( readConfigUsers() ) ) {
+        userField = Components.comboBox( readConfigUsers() );
-            @Override
-            public Dimension getMaximumSize() {
-                return new Dimension( Integer.MAX_VALUE, getPreferredSize().height );
-            }
-        };
         userField.setFont( Res.valueFont().deriveFont( 12f ) );
-        userField.setAlignmentX( LEFT_ALIGNMENT );
         userField.addItemListener( this );
         userField.addActionListener( this );
         add( userField );
@@ -64,13 +55,9 @@ public class ModelAuthenticationPanel extends AuthenticationPanel implements Ite
 
         // Master Password
         masterPasswordLabel = Components.label( "Master Password:" );
-        masterPasswordLabel.setAlignmentX( LEFT_ALIGNMENT );
-        masterPasswordLabel.setHorizontalAlignment( SwingConstants.CENTER );
-        masterPasswordLabel.setVerticalAlignment( SwingConstants.BOTTOM );
         add( masterPasswordLabel );
 
         masterPasswordField = Components.passwordField();
-        masterPasswordField.setAlignmentX( LEFT_ALIGNMENT );
         masterPasswordField.addActionListener( this );
         masterPasswordField.getDocument().addDocumentListener( this );
         add( masterPasswordField );

MasterPassword/Java/masterpassword-gui/src/main/java/com/lyndir/masterpassword/gui/ModelSite.java

@@ -1,6 +1,7 @@
 package com.lyndir.masterpassword.gui;
 
 import com.lyndir.masterpassword.MPSiteType;
+import com.lyndir.masterpassword.MasterKey;
 import com.lyndir.masterpassword.model.*;
 
 
@@ -37,6 +38,19 @@ public class ModelSite extends Site {
         }
     }
 
+    @Override
+    public MasterKey.Version getAlgorithmVersion() {
+        return model.getAlgorithmVersion();
+    }
+
+    @Override
+    public void setAlgorithmVersion(final MasterKey.Version algorithmVersion) {
+        if (algorithmVersion != getAlgorithmVersion()) {
+            model.setAlgorithmVersion( algorithmVersion );
+            MPUserFileManager.get().save();
+        }
+    }
+
     public int getSiteCounter() {
         return model.getSiteCounter();
     }

MasterPassword/Java/masterpassword-gui/src/main/java/com/lyndir/masterpassword/gui/ModelUser.java

@@ -42,6 +42,12 @@ public class ModelUser extends User {
         return model.getAlgorithmVersion();
     }
 
+    @Override
+    public void setAlgorithmVersion(final MasterKey.Version algorithmVersion) {
+        model.setAlgorithmVersion( algorithmVersion );
+        MPUserFileManager.get().save();
+    }
+
     @Override
     public int getAvatar() {
         return model.getAvatar();

MasterPassword/Java/masterpassword-gui/src/main/java/com/lyndir/masterpassword/gui/PasswordFrame.java

@@ -20,52 +20,46 @@ import javax.swing.event.*;
  */
 public class PasswordFrame extends JFrame implements DocumentListener {
 
-    private final User                  user;
+    private final User                         user;
-    private final JTextField            siteNameField;
+    private final Components.GradientPanel     root;
-    private final JButton               siteAddButton;
+    private final JTextField                   siteNameField;
-    private final JComboBox<MPSiteType> siteTypeField;
+    private final JButton                      siteAddButton;
-    private final JSpinner              siteCounterField;
+    private final JComboBox<MPSiteType>        siteTypeField;
-    private final JPasswordField        passwordField;
+    private final JComboBox<MasterKey.Version> siteVersionField;
-    private final JLabel                tipLabel;
+    private final JSpinner                     siteCounterField;
-    private final JCheckBox             maskPasswordField;
+    private final JPasswordField               passwordField;
-    private final char                  passwordEchoChar;
+    private final JLabel                       tipLabel;
-    private final Font                  passwordEchoFont;
+    private final JCheckBox                    maskPasswordField;
-    private       boolean               updatingUI;
+    private final char                         passwordEchoChar;
-    private       Site                  currentSite;
+    private final Font                         passwordEchoFont;
+    private       boolean                      updatingUI;
+    private       Site                         currentSite;
 
     public PasswordFrame(User user)
             throws HeadlessException {
         super( "Master Password" );
         this.user = user;
 
-        JLabel label;
-
         setDefaultCloseOperation( DISPOSE_ON_CLOSE );
-        setContentPane( new JPanel( new BorderLayout( 20, 20 ) ) {
+        setContentPane( root = Components.gradientPanel( new BorderLayout( 20, 20 ), Res.colors().frameBg() ) );
-            {
+        root.setBorder( BorderFactory.createEmptyBorder( 20, 20, 20, 20 ) );
-                setBackground( Res.colors().frameBg() );
-                setBorder( BorderFactory.createEmptyBorder( 20, 20, 20, 20 ) );
-            }
-        } );
-
-        // User
-        add( label = Components.label( strf( "Generating passwords for: %s", user.getFullName() ) ), BorderLayout.NORTH );
-        label.setAlignmentX( LEFT_ALIGNMENT );
 
         // Site
         JPanel sitePanel = Components.boxLayout( BoxLayout.PAGE_AXIS );
+        sitePanel.setOpaque( true );
         sitePanel.setBackground( Res.colors().controlBg() );
         sitePanel.setBorder( BorderFactory.createEmptyBorder( 20, 20, 20, 20 ) );
         add( Components.bordered( sitePanel, BorderFactory.createRaisedBevelBorder(), Res.colors().frameBg() ), BorderLayout.CENTER );
 
-        // Site Name
+        // User
-        sitePanel.add( label = Components.label( "Site Name:" ) );
+        sitePanel.add( Components.label( strf( "Generating passwords for: %s", user.getFullName() ), JLabel.CENTER ) );
-        label.setAlignmentX( LEFT_ALIGNMENT );
+        sitePanel.add( Components.stud() );
 
+        // Site Name
+        sitePanel.add( Components.label( "Site Name:" ) );
         JComponent siteControls = Components.boxLayout( BoxLayout.LINE_AXIS, //
                                                         siteNameField = Components.textField(), Components.stud(),
                                                         siteAddButton = Components.button( "Add Site" ) );
-        siteNameField.setAlignmentX( LEFT_ALIGNMENT );
         siteNameField.getDocument().addDocumentListener( this );
         siteNameField.addActionListener( new ActionListener() {
             @Override
@@ -94,8 +88,6 @@ public class PasswordFrame extends JFrame implements DocumentListener {
             }
         } );
         siteAddButton.setVisible( false );
-        siteAddButton.setAlignmentX( RIGHT_ALIGNMENT );
-        siteAddButton.setAlignmentY( CENTER_ALIGNMENT );
         siteAddButton.addActionListener( new ActionListener() {
             @Override
             public void actionPerformed(final ActionEvent e) {
@@ -103,23 +95,20 @@ public class PasswordFrame extends JFrame implements DocumentListener {
                 siteAddButton.setVisible( false );
             }
         } );
-        siteControls.setBackground( null );
-        siteControls.setAlignmentX( LEFT_ALIGNMENT );
         sitePanel.add( siteControls );
+        sitePanel.add( Components.stud() );
 
         // Site Type & Counter
         MPSiteType[] types = Iterables.toArray( MPSiteType.forClass( MPSiteTypeClass.Generated ), MPSiteType.class );
         JComponent siteSettings = Components.boxLayout( BoxLayout.LINE_AXIS, //
-                                                        siteTypeField = new JComboBox<>( types ), //
+                                                        siteTypeField = Components.comboBox( types ), //
+                                                        Components.stud(), //
+                                                        siteVersionField = Components.comboBox( MasterKey.Version.values() ), //
                                                         Components.stud(), //
                                                         siteCounterField = Components.spinner(
                                                                 new SpinnerNumberModel( 1, 1, Integer.MAX_VALUE, 1 ) ) );
-        siteSettings.setBackground( null );
-        siteSettings.setAlignmentX( LEFT_ALIGNMENT );
         sitePanel.add( siteSettings );
         siteTypeField.setFont( Res.valueFont().deriveFont( 12f ) );
-        siteTypeField.setAlignmentX( LEFT_ALIGNMENT );
-        siteTypeField.setAlignmentY( CENTER_ALIGNMENT );
         siteTypeField.setSelectedItem( MPSiteType.GeneratedLong );
         siteTypeField.addItemListener( new ItemListener() {
             @Override
@@ -128,9 +117,18 @@ public class PasswordFrame extends JFrame implements DocumentListener {
             }
         } );
 
+        siteVersionField.setFont( Res.valueFont().deriveFont( 12f ) );
+        siteVersionField.setAlignmentX( RIGHT_ALIGNMENT );
+        siteVersionField.setSelectedItem( user.getAlgorithmVersion() );
+        siteVersionField.addItemListener( new ItemListener() {
+            @Override
+            public void itemStateChanged(final ItemEvent e) {
+                updatePassword();
+            }
+        } );
+
         siteCounterField.setFont( Res.valueFont().deriveFont( 12f ) );
         siteCounterField.setAlignmentX( RIGHT_ALIGNMENT );
-        siteCounterField.setAlignmentY( CENTER_ALIGNMENT );
         siteCounterField.addChangeListener( new ChangeListener() {
             @Override
             public void stateChanged(final ChangeEvent e) {
@@ -151,9 +149,11 @@ public class PasswordFrame extends JFrame implements DocumentListener {
 
         // Password
         passwordField = new JPasswordField();
+        passwordField.setAlignmentX( Component.CENTER_ALIGNMENT );
         passwordField.setEditable( false );
         passwordField.setHorizontalAlignment( JTextField.CENTER );
         passwordField.putClientProperty( "JPasswordField.cutCopyAllowed", true );
+        passwordField.setBorder( null );
         passwordEchoChar = passwordField.getEchoChar();
         passwordEchoFont = passwordField.getFont().deriveFont( 40f );
         updateMask();
@@ -161,16 +161,15 @@ public class PasswordFrame extends JFrame implements DocumentListener {
         // Tip
         tipLabel = Components.label( " ", JLabel.CENTER );
         tipLabel.setAlignmentX( Component.CENTER_ALIGNMENT );
-
+        JPanel passwordContainer = Components.boxLayout( BoxLayout.PAGE_AXIS, maskPasswordField, passwordField, tipLabel );
-        JPanel passwordContainer = Components.boxLayout( BoxLayout.PAGE_AXIS, maskPasswordField,
+        passwordContainer.setOpaque( true );
-                                                         Components.bordered( passwordField, BorderFactory.createLoweredSoftBevelBorder(),
+        passwordContainer.setBackground( Color.white );
-                                                                              Res.colors().frameBg() ), tipLabel );
+        passwordContainer.setBorder( BorderFactory.createEmptyBorder( 8, 8, 8, 8 ) );
-        passwordContainer.setBackground( null );
+        add( Components.bordered( passwordContainer, BorderFactory.createLoweredSoftBevelBorder(), Res.colors().frameBg() ),
-        add( passwordContainer, BorderLayout.SOUTH );
+             BorderLayout.SOUTH );
 
         pack();
-        setMinimumSize( getSize() );
+        setMinimumSize( new Dimension( Math.max( 600, getPreferredSize().width ), Math.max( 300, getPreferredSize().height ) ) );
-        setPreferredSize( new Dimension( 600, getSize().height ) );
         pack();
 
         setLocationByPlatform( true );
@@ -188,19 +187,21 @@ public class PasswordFrame extends JFrame implements DocumentListener {
         final String siteNameQuery = siteNameField.getText();
         if (updatingUI)
             return Futures.immediateCancelledFuture();
-        if (siteNameQuery == null || siteNameQuery.isEmpty() || !user.hasKey()) {
+        if (siteNameQuery == null || siteNameQuery.isEmpty() || !user.isKeyAvailable()) {
             tipLabel.setText( null );
             passwordField.setText( null );
             return Futures.immediateCancelledFuture();
         }
 
-        MPSiteType siteType = siteTypeField.getModel().getElementAt( siteTypeField.getSelectedIndex() );
+        final MPSiteType siteType = siteTypeField.getModel().getElementAt( siteTypeField.getSelectedIndex() );
+        final MasterKey.Version siteVersion = siteVersionField.getItemAt( siteVersionField.getSelectedIndex() );
         final int siteCounter = (Integer) siteCounterField.getValue();
         final Site site = currentSite != null && currentSite.getSiteName().equals( siteNameQuery )? currentSite
-                : Iterables.getFirst( user.findSitesByName( siteNameQuery ), new IncognitoSite( siteNameQuery, siteType, siteCounter ) );
+                : Iterables.getFirst( user.findSitesByName( siteNameQuery ), new IncognitoSite( siteNameQuery, siteType, siteCounter, user.getAlgorithmVersion() ) );
         assert site != null;
         if (site == currentSite) {
             site.setSiteType( siteType );
+            site.setAlgorithmVersion( siteVersion );
             site.setSiteCounter( siteCounter );
         }
 
@@ -208,7 +209,8 @@ public class PasswordFrame extends JFrame implements DocumentListener {
             @Override
             public String call()
                     throws Exception {
-                return user.getKey().encode( site.getSiteName(), site.getSiteType(), site.getSiteCounter(), MPSiteVariant.Password, null );
+                return user.getKey( site.getAlgorithmVersion() )
+                           .encode( site.getSiteName(), site.getSiteType(), site.getSiteCounter(), MPSiteVariant.Password, null );
             }
         } );
         Futures.addCallback( passwordFuture, new FutureCallback<String>() {
@@ -221,6 +223,7 @@ public class PasswordFrame extends JFrame implements DocumentListener {
                         currentSite = site;
                         siteAddButton.setVisible( user instanceof ModelUser && !(currentSite instanceof ModelSite) );
                         siteTypeField.setSelectedItem( currentSite.getSiteType() );
+                        siteVersionField.setSelectedItem( currentSite.getAlgorithmVersion() );
                         siteCounterField.setValue( currentSite.getSiteCounter() );
                         siteNameField.setText( currentSite.getSiteName() );
                         if (siteNameField.getText().startsWith( siteNameQuery ))

MasterPassword/Java/masterpassword-gui/src/main/java/com/lyndir/masterpassword/gui/Site.java

@@ -3,6 +3,7 @@ package com.lyndir.masterpassword.gui;
 import static com.lyndir.lhunath.opal.system.util.StringUtils.strf;
 
 import com.lyndir.masterpassword.MPSiteType;
+import com.lyndir.masterpassword.MasterKey;
 
 
 /**
@@ -18,6 +19,10 @@ public abstract class Site {
 
     public abstract void setSiteType(final MPSiteType siteType);
 
+    public abstract MasterKey.Version getAlgorithmVersion();
+
+    public abstract void setAlgorithmVersion(final MasterKey.Version algorithmVersion);
+
     public abstract int getSiteCounter();
 
     public abstract void setSiteCounter(final int siteCounter);

MasterPassword/Java/masterpassword-gui/src/main/java/com/lyndir/masterpassword/gui/UnlockFrame.java

@@ -6,7 +6,6 @@ import com.lyndir.masterpassword.util.Components;
 import java.awt.*;
 import java.awt.event.*;
 import javax.swing.*;
-import javax.swing.border.*;
 
 
 /**
@@ -14,13 +13,13 @@ import javax.swing.border.*;
  */
 public class UnlockFrame extends JFrame {
 
-    private final SignInCallback      signInCallback;
+    private final SignInCallback           signInCallback;
-    private final JPanel              root;
+    private final Components.GradientPanel root;
-    private final JButton             signInButton;
+    private final JButton                  signInButton;
-    private final JPanel              authenticationContainer;
+    private final JPanel                   authenticationContainer;
-    private       AuthenticationPanel authenticationPanel;
+    private       AuthenticationPanel      authenticationPanel;
-    private       boolean             incognito;
+    private       boolean                  incognito;
-    public        User                user;
+    public        User                     user;
 
     public UnlockFrame(final SignInCallback signInCallback)
             throws HeadlessException {
@@ -28,11 +27,11 @@ public class UnlockFrame extends JFrame {
         this.signInCallback = signInCallback;
 
         setDefaultCloseOperation( DISPOSE_ON_CLOSE );
-        setContentPane( root = new JPanel( new BorderLayout( 20, 20 ) ) );
+        setContentPane( root = Components.gradientPanel( new BorderLayout( 20, 20 ), Res.colors().frameBg() ) );
-        root.setBackground( Res.colors().frameBg() );
+        root.setBorder( BorderFactory.createEmptyBorder( 20, 20, 20, 20 ) );
-        root.setBorder( new EmptyBorder( 20, 20, 20, 20 ) );
 
         authenticationContainer = Components.boxLayout( BoxLayout.PAGE_AXIS );
+        authenticationContainer.setOpaque( true );
         authenticationContainer.setBackground( Res.colors().controlBg() );
         authenticationContainer.setBorder( BorderFactory.createEmptyBorder( 20, 20, 20, 20 ) );
         add( Components.bordered( authenticationContainer, BorderFactory.createRaisedBevelBorder(), Res.colors().frameBg() ) );
@@ -42,7 +41,6 @@ public class UnlockFrame extends JFrame {
                                                  Box.createGlue() );
         signInBox.setBackground( null );
         root.add( signInBox, BorderLayout.SOUTH );
-        signInButton.setAlignmentX( LEFT_ALIGNMENT );
         signInButton.addActionListener( new AbstractAction() {
             @Override
             public void actionPerformed(final ActionEvent e) {
@@ -75,7 +73,6 @@ public class UnlockFrame extends JFrame {
         authenticationContainer.add( Components.stud() );
 
         final JCheckBox incognitoCheckBox = Components.checkBox( "Incognito" );
-        incognitoCheckBox.setAlignmentX( LEFT_ALIGNMENT );
         incognitoCheckBox.setSelected( incognito );
         incognitoCheckBox.addItemListener( new ItemListener() {
             @Override
@@ -91,7 +88,6 @@ public class UnlockFrame extends JFrame {
         } );
 
         JComponent toolsPanel = Components.boxLayout( BoxLayout.LINE_AXIS, incognitoCheckBox, Box.createGlue() );
-        toolsPanel.setAlignmentX( Component.LEFT_ALIGNMENT );
         authenticationContainer.add( toolsPanel );
         for (JButton button : authenticationPanel.getButtons()) {
             button.setMargin( new Insets( 0, 0, 0, 0 ) );
@@ -118,7 +114,7 @@ public class UnlockFrame extends JFrame {
     }
 
     boolean checkSignIn() {
-        boolean enabled = user != null && !user.getFullName().isEmpty() && user.hasKey();
+        boolean enabled = user != null && !user.getFullName().isEmpty() && user.isKeyAvailable();
         signInButton.setEnabled( enabled );
 
         return enabled;

MasterPassword/Java/masterpassword-gui/src/main/java/com/lyndir/masterpassword/gui/User.java

@@ -2,9 +2,9 @@ package com.lyndir.masterpassword.gui;
 
 import static com.lyndir.lhunath.opal.system.util.StringUtils.*;
 
+import com.google.common.collect.Maps;
 import com.lyndir.masterpassword.MasterKey;
-import com.lyndir.masterpassword.model.MPUser;
+import java.util.EnumMap;
-import java.security.KeyException;
 import java.util.Objects;
 import javax.annotation.Nonnull;
 
@@ -14,7 +14,8 @@ import javax.annotation.Nonnull;
  */
 public abstract class User {
 
-    private MasterKey key;
+    @Nonnull
+    private static final EnumMap<MasterKey.Version, MasterKey> keyByVersion = Maps.newEnumMap( MasterKey.Version.class  );
 
     public abstract String getFullName();
 
@@ -22,32 +23,42 @@ public abstract class User {
 
     public abstract MasterKey.Version getAlgorithmVersion();
 
+    public abstract void setAlgorithmVersion(final MasterKey.Version algorithmVersion);
+
     public int getAvatar() {
         return 0;
     }
 
-    public boolean hasKey() {
+    public boolean isKeyAvailable() {
         String masterPassword = getMasterPassword();
-        return key != null || (masterPassword != null && !masterPassword.isEmpty());
+        return masterPassword != null && !masterPassword.isEmpty();
     }
 
     @Nonnull
     public MasterKey getKey() throws MasterKeyException {
-        if (key == null) {
+        return getKey( getAlgorithmVersion() );
-            String masterPassword = getMasterPassword();
+    }
-            if (masterPassword == null || masterPassword.isEmpty()) {
-                reset();
-                throw new MasterKeyException( strf( "Master password unknown for user: %s", getFullName() ) );
-            }
 
-            key = MasterKey.create( getAlgorithmVersion(), getFullName(), masterPassword );
+    @Nonnull
+    public MasterKey getKey(MasterKey.Version algorithmVersion) throws MasterKeyException {
+        String masterPassword = getMasterPassword();
+        if (masterPassword == null || masterPassword.isEmpty()) {
+            reset();
+            throw new MasterKeyException( strf( "Master password unknown for user: %s", getFullName() ) );
         }
 
+        MasterKey key = keyByVersion.get( algorithmVersion );
+        if (key == null)
+            keyByVersion.put( algorithmVersion, key = MasterKey.create( algorithmVersion, getFullName(), masterPassword ) );
+        if (!key.isValid())
+            key.revalidate( masterPassword );
+
         return key;
     }
 
     public void reset() {
-        key = null;
+        for (MasterKey key : keyByVersion.values())
+            key.invalidate();
     }
 
     public abstract Iterable<Site> findSitesByName(final String siteName);

MasterPassword/Java/masterpassword-gui/src/main/java/com/lyndir/masterpassword/util/Components.java

@@ -1,5 +1,6 @@
 package com.lyndir.masterpassword.util;
 
+import com.lyndir.masterpassword.gui.ModelUser;
 import com.lyndir.masterpassword.gui.Res;
 import java.awt.*;
 import javax.swing.*;
@@ -12,8 +13,9 @@ import javax.swing.border.CompoundBorder;
  */
 public abstract class Components {
 
-    public static JPanel boxLayout(int axis, Component... components) {
+    public static GradientPanel boxLayout(int axis, Component... components) {
-        JPanel container = new JPanel();
+        GradientPanel container = gradientPanel( null, null );
+        //        container.setBackground( Color.red );
         container.setLayout( new BoxLayout( container, axis ) );
         for (Component component : components)
             container.add( component );
@@ -21,12 +23,12 @@ public abstract class Components {
         return container;
     }
 
-    public static JPanel bordered(final JComponent component, final Border border) {
+    public static GradientPanel bordered(final JComponent component, final Border border) {
         return bordered( component, border, null );
     }
 
-    public static JPanel bordered(final JComponent component, final Border border, Color background) {
+    public static GradientPanel bordered(final JComponent component, final Border border, Color background) {
-        JPanel box = boxLayout( BoxLayout.LINE_AXIS, component );
+        GradientPanel box = boxLayout( BoxLayout.LINE_AXIS, component );
 
         if (border != null)
             box.setBorder( border );
@@ -37,12 +39,25 @@ public abstract class Components {
         return box;
     }
 
+    public static GradientPanel gradientPanel(final LayoutManager layout, final Color color) {
+        return new GradientPanel( layout, color ) {
+            {
+                setOpaque( color != null );
+                setBackground( null );
+                setAlignmentX( LEFT_ALIGNMENT );
+                setAlignmentY( BOTTOM_ALIGNMENT );
+            }
+        };
+    }
+
     public static JTextField textField() {
         return new JTextField() {
             {
                 setBorder( BorderFactory.createCompoundBorder( BorderFactory.createLineBorder( Res.colors().controlBorder(), 1, true ),
                                                                BorderFactory.createEmptyBorder( 4, 4, 4, 4 ) ) );
                 setFont( Res.valueFont().deriveFont( 12f ) );
+                setAlignmentX( LEFT_ALIGNMENT );
+                setAlignmentY( BOTTOM_ALIGNMENT );
             }
 
             @Override
@@ -57,6 +72,8 @@ public abstract class Components {
             {
                 setBorder( BorderFactory.createCompoundBorder( BorderFactory.createLineBorder( Res.colors().controlBorder(), 1, true ),
                                                                BorderFactory.createEmptyBorder( 4, 4, 4, 4 ) ) );
+                setAlignmentX( LEFT_ALIGNMENT );
+                setAlignmentY( BOTTOM_ALIGNMENT );
             }
 
             @Override
@@ -70,6 +87,8 @@ public abstract class Components {
         return new JButton( label ) {
             {
                 setFont( Res.controlFont().deriveFont( 12f ) );
+                setAlignmentX( LEFT_ALIGNMENT );
+                setAlignmentY( BOTTOM_ALIGNMENT );
             }
 
             @Override
@@ -80,7 +99,12 @@ public abstract class Components {
     }
 
     public static Component stud() {
-        return Box.createRigidArea( new Dimension( 8, 8 ) );
+        Dimension studDimension = new Dimension( 8, 8 );
+        Box.Filler rigidArea = new Box.Filler( studDimension, studDimension, studDimension );
+        rigidArea.setAlignmentX( Component.LEFT_ALIGNMENT );
+        rigidArea.setAlignmentY( Component.BOTTOM_ALIGNMENT );
+        rigidArea.setBackground( Color.red );
+        return rigidArea;
     }
 
     public static JSpinner spinner(final SpinnerModel model) {
@@ -90,6 +114,8 @@ public abstract class Components {
                         BorderFactory.createLineBorder( Res.colors().controlBorder(), 1, true ),
                         BorderFactory.createEmptyBorder( 4, 4, 4, 4 ) );
                 ((DefaultEditor) getEditor()).getTextField().setBorder( editorBorder );
+                setAlignmentX( LEFT_ALIGNMENT );
+                setAlignmentY( BOTTOM_ALIGNMENT );
             }
 
             @Override
@@ -107,6 +133,13 @@ public abstract class Components {
         return new JLabel( label, alignment ) {
             {
                 setFont( Res.controlFont().deriveFont( 12f ) );
+                setAlignmentX( LEFT_ALIGNMENT );
+                setAlignmentY( BOTTOM_ALIGNMENT );
+            }
+
+            @Override
+            public Dimension getMaximumSize() {
+                return new Dimension( Integer.MAX_VALUE, getPreferredSize().height );
             }
         };
     }
@@ -115,7 +148,67 @@ public abstract class Components {
         return new JCheckBox( label ) {
             {
                 setFont( Res.controlFont().deriveFont( 12f ) );
+                setAlignmentX( LEFT_ALIGNMENT );
+                setAlignmentY( BOTTOM_ALIGNMENT );
             }
         };
     }
+
+    @SafeVarargs
+    public static <V> JComboBox<V> comboBox(final V... values) {
+        return comboBox( new DefaultComboBoxModel<>( values ) );
+    }
+
+    public static <M> JComboBox<M> comboBox(final ComboBoxModel<M> model) {
+        return new JComboBox<M>( model ) {
+            {
+                setFont( Res.controlFont().deriveFont( 12f ) );
+                setAlignmentX( LEFT_ALIGNMENT );
+                setAlignmentY( BOTTOM_ALIGNMENT );
+            }
+
+            @Override
+            public Dimension getMaximumSize() {
+                return new Dimension( Integer.MAX_VALUE, getPreferredSize().height );
+            }
+        };
+    }
+
+    public static class GradientPanel extends JPanel {
+
+        private Color         gradientColor;
+        private GradientPaint paint;
+
+        protected GradientPanel(final LayoutManager layout, final Color gradientColor) {
+            super( layout );
+            this.gradientColor = gradientColor;
+            setBackground( null );
+        }
+
+        public Color getGradientColor() {
+            return gradientColor;
+        }
+
+        public void setGradientColor(final Color gradientColor) {
+            this.gradientColor = gradientColor;
+        }
+
+        @Override
+        public void doLayout() {
+            super.doLayout();
+
+            if (gradientColor != null)
+                paint = new GradientPaint( new Point( 0, 0 ), gradientColor, new Point( getWidth(), getHeight() ), gradientColor.darker() );
+        }
+
+        @Override
+        protected void paintComponent(final Graphics g) {
+            super.paintComponent( g );
+
+            if (paint != null) {
+                ((Graphics2D) g).setPaint( paint );
+                g.fillRect( 0, 0, getWidth(), getHeight() );
+            }
+        }
+    }
 }

MasterPassword/Java/masterpassword-model/src/main/java/com/lyndir/masterpassword/model/MPSite.java

@@ -6,7 +6,6 @@ import static com.lyndir.lhunath.opal.system.util.StringUtils.strf;
 import com.lyndir.masterpassword.*;
 import java.util.Objects;
 import javax.annotation.Nullable;
-import org.joda.time.DateTime;
 import org.joda.time.Instant;
 
 
@@ -19,7 +18,7 @@ public class MPSite {
     public static final int        DEFAULT_COUNTER = 1;
 
     private final MPUser            user;
-    private       MasterKey.Version mpVersion;
+    private       MasterKey.Version algorithmVersion;
     private       Instant           lastUsed;
     private       String            siteName;
     private       MPSiteType        siteType;
@@ -33,17 +32,17 @@ public class MPSite {
 
     public MPSite(final MPUser user, final String siteName, final MPSiteType siteType, final int siteCounter) {
         this.user = user;
-        this.mpVersion = MasterKey.Version.CURRENT;
+        this.algorithmVersion = MasterKey.Version.CURRENT;
         this.lastUsed = new Instant();
         this.siteName = siteName;
         this.siteType = siteType;
         this.siteCounter = siteCounter;
     }
 
-    protected MPSite(final MPUser user, final MasterKey.Version mpVersion, final Instant lastUsed, final String siteName, final MPSiteType siteType, final int siteCounter,
+    protected MPSite(final MPUser user, final MasterKey.Version algorithmVersion, final Instant lastUsed, final String siteName, final MPSiteType siteType, final int siteCounter,
                      final int uses, final String loginName, final String importContent) {
         this.user = user;
-        this.mpVersion = mpVersion;
+        this.algorithmVersion = algorithmVersion;
         this.lastUsed = lastUsed;
         this.siteName = siteName;
         this.siteType = siteType;
@@ -69,12 +68,12 @@ public class MPSite {
         return null;
     }
 
-    public MasterKey.Version getMPVersion() {
+    public MasterKey.Version getAlgorithmVersion() {
-        return mpVersion;
+        return algorithmVersion;
     }
 
-    public void setMPVersion(final MasterKey.Version mpVersion) {
+    public void setAlgorithmVersion(final MasterKey.Version mpVersion) {
-        this.mpVersion = mpVersion;
+        this.algorithmVersion = mpVersion;
     }
 
     public Instant getLastUsed() {

MasterPassword/Java/masterpassword-model/src/main/java/com/lyndir/masterpassword/model/MPSiteMarshaller.java

@@ -82,7 +82,7 @@ public class MPSiteMarshaller {
                                   site.getUses(), // uses
                                   strf( "%d:%d:%d", //
                                         site.getSiteType().getType(), // type
-                                        site.getMPVersion(), // algorithm
+                                        site.getAlgorithmVersion(), // algorithm
                                         site.getSiteCounter() ), // counter
                                   ifNotNullElse( site.getLoginName(), "" ), // loginName
                                   site.getSiteName(), // siteName