Implement security answers & immediate site lookup.

lib/bin/build_lib

@@ -36,7 +36,7 @@ _needs() {
         IFS=: read pkg tools <<< "$spec"
         IFS=, read -a tools <<< "${tools:-$pkg}"
         for tool in "${tools[@]}"; do
-            hash "$tool" && continue 2
+            hash "$tool" 2>/dev/null && continue 2
         done
 
         echo >&2 "Missing: $pkg.  Please install this package."

platform-independent/java/gui/src/main/java/com/lyndir/masterpassword/gui/model/MPIncognitoQuestion.java

@@ -31,17 +31,7 @@ import javax.annotation.Nullable;
  */
 public class MPIncognitoQuestion extends MPBasicQuestion {
 
-    private final MPIncognitoSite site;
-
     public MPIncognitoQuestion(final MPIncognitoSite site, final String keyword, @Nullable final MPResultType type) {
-        super( keyword, ifNotNullElse( type, site.getAlgorithm().mpw_default_answer_type() ) );
+        super( site, keyword, ifNotNullElse( type, site.getAlgorithm().mpw_default_answer_type() ) );
-
-        this.site = site;
-    }
-
-    @Nonnull
-    @Override
-    public MPIncognitoSite getSite() {
-        return site;
     }
 }

platform-independent/java/gui/src/main/java/com/lyndir/masterpassword/gui/model/MPIncognitoSite.java

@@ -40,4 +40,10 @@ public class MPIncognitoSite extends MPBasicSite<MPIncognitoUser, MPIncognitoQue
                            @Nullable final MPResultType resultType, @Nullable final MPResultType loginType) {
         super( user, siteName, (algorithm == null)? user.getAlgorithm(): algorithm, counter, resultType, loginType );
     }
+
+    @Nonnull
+    @Override
+    public MPIncognitoQuestion addQuestion(final String keyword) {
+        return addQuestion( new MPIncognitoQuestion( this, keyword, null ) );
+    }
 }

platform-independent/java/gui/src/main/java/com/lyndir/masterpassword/gui/model/MPIncognitoUser.java

@@ -20,6 +20,7 @@ package com.lyndir.masterpassword.gui.model;
 
 import com.lyndir.masterpassword.MPAlgorithm;
 import com.lyndir.masterpassword.model.impl.MPBasicUser;
+import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
 
 
@@ -38,6 +39,7 @@ public class MPIncognitoUser extends MPBasicUser<MPIncognitoSite> {
         return null;
     }
 
+    @Nonnull
     @Override
     public MPIncognitoSite addSite(final String siteName) {
         return addSite( new MPIncognitoSite( this, siteName ) );

platform-independent/java/gui/src/main/java/com/lyndir/masterpassword/gui/model/MPNewQuestion.java

@@ -0,0 +1,15 @@
+package com.lyndir.masterpassword.gui.model;
+
+import com.lyndir.masterpassword.model.MPSite;
+import com.lyndir.masterpassword.model.impl.MPBasicQuestion;
+
+
+/**
+ * @author lhunath, 2018-07-27
+ */
+public class MPNewQuestion extends MPBasicQuestion {
+
+    public MPNewQuestion(final MPSite<?> site, final String keyword) {
+        super( site, keyword, site.getAlgorithm().mpw_default_answer_type() );
+    }
+}

platform-independent/java/gui/src/main/java/com/lyndir/masterpassword/gui/model/MPNewSite.java

@@ -2,6 +2,7 @@ package com.lyndir.masterpassword.gui.model;
 
 import com.lyndir.masterpassword.model.*;
 import com.lyndir.masterpassword.model.impl.*;
+import javax.annotation.Nonnull;
 
 
 /**
@@ -12,4 +13,10 @@ public class MPNewSite extends MPBasicSite<MPUser<?>, MPQuestion> {
     public MPNewSite(final MPUser<?> user, final String siteName) {
         super( user, siteName );
     }
+
+    @Nonnull
+    @Override
+    public MPQuestion addQuestion(final String keyword) {
+        throw new UnsupportedOperationException( "Cannot add a question to a site that hasn't been created yet." );
+    }
 }

platform-independent/java/gui/src/main/java/com/lyndir/masterpassword/gui/util/Components.java

@@ -100,6 +100,7 @@ public abstract class Components {
 
     public static int showDialog(@Nullable final Component owner, @Nullable final String title, final JOptionPane pane) {
         JDialog dialog = pane.createDialog( owner, title );
+        dialog.setMinimumSize( new Dimension( 520, 0 ) );
         dialog.setModalityType( Dialog.ModalityType.DOCUMENT_MODAL );
         showDialog( dialog );
 
@@ -143,7 +144,6 @@ public abstract class Components {
                                       title, Dialog.ModalityType.DOCUMENT_MODAL );
         dialog.setMinimumSize( new Dimension( 320, 0 ) );
         dialog.setLocationRelativeTo( owner );
-        dialog.setLocationByPlatform( true );
         dialog.setContentPane( content );
 
         return showDialog( dialog );
@@ -155,6 +155,7 @@ public abstract class Components {
         dialog.getRootPane().putClientProperty( "Window.style", "small" );
         dialog.pack();
 
+        dialog.setLocationByPlatform( true );
         dialog.setVisible( true );
 
         return dialog;
@@ -176,7 +177,7 @@ public abstract class Components {
         };
     }
 
-    public static JTextField textField(@Nullable final String text, @Nullable final Consumer<String> selection) {
+    public static JTextField textField(@Nullable final String text, @Nullable final Consumer<String> change) {
         return new JTextField( text ) {
             {
                 setBorder( BorderFactory.createCompoundBorder( BorderFactory.createLineBorder( Res.colors().controlBorder(), 1, true ),
@@ -184,23 +185,25 @@ public abstract class Components {
                 setFont( Res.fonts().valueFont( TEXT_SIZE_CONTROL ) );
                 setAlignmentX( LEFT_ALIGNMENT );
 
-                if (selection != null)
+                if (change != null) {
                     getDocument().addDocumentListener( new DocumentListener() {
                         @Override
                         public void insertUpdate(final DocumentEvent e) {
-                            selection.accept( getText() );
+                            change.accept( getText() );
                         }
 
                         @Override
                         public void removeUpdate(final DocumentEvent e) {
-                            selection.accept( getText() );
+                            change.accept( getText() );
                         }
 
                         @Override
                         public void changedUpdate(final DocumentEvent e) {
-                            selection.accept( getText() );
+                            change.accept( getText() );
                         }
                     } );
+                    change.accept( getText() );
+                }
             }
 
             @Override
@@ -228,6 +231,7 @@ public abstract class Components {
     public static <E> JList<E> list(final ListModel<E> model, final Function<E, String> valueTransformer) {
         return new JList<E>( model ) {
             {
+                setAlignmentX( LEFT_ALIGNMENT );
                 setFont( Res.fonts().valueFont( TEXT_SIZE_CONTROL ) );
                 setCellRenderer( new DefaultListCellRenderer() {
                     @Override
@@ -241,7 +245,9 @@ public abstract class Components {
                         return this;
                     }
                 } );
-                setAlignmentX( LEFT_ALIGNMENT );
+
+                if (model instanceof CollectionListModel)
+                    ((CollectionListModel<E>) model).registerList( this );
             }
 
             @Override

platform-independent/java/gui/src/main/java/com/lyndir/masterpassword/gui/view/FilesPanel.java

@@ -9,8 +9,6 @@ import com.lyndir.masterpassword.model.MPUser;
 import com.lyndir.masterpassword.model.impl.MPFileUser;
 import com.lyndir.masterpassword.model.impl.MPFileUserManager;
 import java.awt.*;
-import java.util.Collection;
-import java.util.concurrent.CopyOnWriteArraySet;
 import javax.annotation.Nullable;
 import javax.swing.*;
 
@@ -26,8 +24,6 @@ public class FilesPanel extends JPanel implements MPFileUserManager.Listener, Ma
 
     private final CollectionListModel<MPUser<?>> usersModel =
             CollectionListModel.<MPUser<?>>copy( MPFileUserManager.get().getFiles() ).selection( MasterPassword.get()::activateUser );
-    private final JComboBox<? extends MPUser<?>> userField  =
-            Components.comboBox( usersModel, user -> ifNotNull( user, MPUser::getFullName ) );
 
     protected FilesPanel() {
         setOpaque( false );
@@ -46,7 +42,7 @@ public class FilesPanel extends JPanel implements MPFileUserManager.Listener, Ma
         add( Components.strut( Components.margin() ) );
 
         // User Selection
-        add( userField );
+        add( Components.comboBox( usersModel, user -> ifNotNull( user, MPUser::getFullName ) ) );
 
         MPFileUserManager.get().addListener( this );
         MasterPassword.get().addListener( this );

platform-independent/java/gui/src/main/java/com/lyndir/masterpassword/gui/view/MasterPasswordFrame.java

@@ -3,12 +3,10 @@ package com.lyndir.masterpassword.gui.view;
 import com.lyndir.lhunath.opal.system.logging.Logger;
 import com.lyndir.masterpassword.gui.util.Components;
 import com.lyndir.masterpassword.gui.util.Res;
-import com.lyndir.masterpassword.model.MPUser;
 import com.lyndir.masterpassword.model.impl.MPFileUserManager;
 import java.awt.*;
 import java.awt.event.ComponentAdapter;
 import java.awt.event.ComponentEvent;
-import javax.annotation.Nullable;
 import javax.swing.*;
 import javax.swing.border.BevelBorder;
 
@@ -23,8 +21,6 @@ public class MasterPasswordFrame extends JFrame {
 
     @SuppressWarnings("FieldCanBeLocal")
     private final Components.GradientPanel root        = Components.borderPanel( Res.colors().frameBg(), BoxLayout.PAGE_AXIS );
-    private final FilesPanel               filesPanel  = new FilesPanel();
-    private final JPanel                   userPanel   = Components.panel( new BorderLayout( 0, 0 ) );
     private final UserContentPanel         userContent = new UserContentPanel();
 
     @SuppressWarnings("MagicNumber")
@@ -32,15 +28,16 @@ public class MasterPasswordFrame extends JFrame {
         super( "Master Password" );
 
         setContentPane( root );
-        root.add( filesPanel );
+        root.add( new FilesPanel() );
         root.add( Components.strut() );
-        root.add( userPanel );
 
+        JPanel userPanel = Components.panel( new BorderLayout( 0, 0 ) );
         userPanel.add( userContent.getUserToolbar(), BorderLayout.LINE_START );
         userPanel.add( userContent.getSiteToolbar(), BorderLayout.LINE_END );
         userPanel.add( Components.borderPanel(
                 BorderFactory.createBevelBorder( BevelBorder.RAISED, Res.colors().controlBorder(), Res.colors().frameBg() ),
                 Res.colors().controlBg(), BoxLayout.PAGE_AXIS, userContent ), BorderLayout.CENTER );
+        root.add( userPanel );
 
         addComponentListener( new ComponentHandler() );
         setPreferredSize( new Dimension( 800, 560 ) );

platform-independent/java/gui/src/main/java/com/lyndir/masterpassword/gui/view/UserContentPanel.java

@@ -10,8 +10,7 @@ import com.lyndir.lhunath.opal.system.util.ObjectUtils;
 import com.lyndir.masterpassword.*;
 import com.lyndir.masterpassword.gui.MPGuiConstants;
 import com.lyndir.masterpassword.gui.MasterPassword;
-import com.lyndir.masterpassword.gui.model.MPIncognitoUser;
+import com.lyndir.masterpassword.gui.model.*;
-import com.lyndir.masterpassword.gui.model.MPNewSite;
 import com.lyndir.masterpassword.gui.util.*;
 import com.lyndir.masterpassword.gui.util.Platform;
 import com.lyndir.masterpassword.model.*;
@@ -290,9 +289,9 @@ public class UserContentPanel extends JPanel implements MasterPassword.Listener,
         private final JButton resetButton  = Components.button( Res.icons().reset(), event -> resetUser(),
                                                                 "Change the master password for this user." );
 
-        private final JPasswordField masterPasswordField = Components.passwordField();
+        private final JPasswordField masterPasswordField;
-        private final JLabel         errorLabel          = Components.label();
+        private final JLabel         errorLabel;
-        private final JLabel         identiconLabel      = Components.label( SwingConstants.CENTER );
+        private final JLabel         identiconLabel;
 
         private Future<?> identiconJob;
 
@@ -312,16 +311,16 @@ public class UserContentPanel extends JPanel implements MasterPassword.Listener,
             add( Components.heading( user.getFullName(), SwingConstants.CENTER ) );
             add( Components.strut() );
 
-            add( identiconLabel );
+            add( identiconLabel = Components.label( SwingConstants.CENTER ) );
             identiconLabel.setFont( Res.fonts().emoticonsFont( Components.TEXT_SIZE_CONTROL ) );
             add( Box.createGlue() );
 
             add( Components.label( "Master Password:" ) );
             add( Components.strut() );
-            add( masterPasswordField );
+            add( masterPasswordField = Components.passwordField() );
             masterPasswordField.addActionListener( this );
             masterPasswordField.getDocument().addDocumentListener( this );
-            add( errorLabel );
+            add( errorLabel = Components.label() );
             errorLabel.setForeground( Res.colors().errorFg() );
             add( Box.createGlue() );
         }
@@ -468,21 +467,20 @@ public class UserContentPanel extends JPanel implements MasterPassword.Listener,
                                                                    "Sign out and lock user." );
         private final JButton settingsButton  = Components.button( Res.icons().settings(), event -> showSiteSettings(),
                                                                    "Show site settings." );
-        private final JButton questionsButton = Components.button( Res.icons().question(), null,
+        private final JButton questionsButton = Components.button( Res.icons().question(), event -> showSiteQuestions(),
                                                                    "Show site recovery questions." );
         private final JButton deleteButton    = Components.button( Res.icons().delete(), event -> deleteSite(),
                                                                    "Delete the site from the user." );
 
         @Nonnull
         private final MPUser<?>                      user;
-        private final JLabel                         passwordLabel = Components.label( SwingConstants.CENTER );
+        private final JLabel                         passwordLabel;
-        private final JLabel                         passwordField = Components.heading( SwingConstants.CENTER );
+        private final JLabel                         passwordField;
-        private final JLabel                         queryLabel    = Components.label();
+        private final JLabel                         answerField;
-        private final JTextField                     queryField    = Components.textField( null, this::updateSites );
+        private final JLabel                         queryLabel;
-        private final CollectionListModel<MPSite<?>> sitesModel    =
+        private final JTextField                     queryField;
-                new CollectionListModel<MPSite<?>>().selection( this::showSiteResult );
+        private final CollectionListModel<MPSite<?>> sitesModel;
-        private final JList<MPSite<?>>               sitesList     =
+        private final JList<MPSite<?>>               sitesList;
-                Components.list( sitesModel, this::getSiteDescription );
 
         private Future<?> updateSitesJob;
 
@@ -501,27 +499,32 @@ public class UserContentPanel extends JPanel implements MasterPassword.Listener,
             siteToolbar.add( questionsButton );
             siteToolbar.add( deleteButton );
             settingsButton.setEnabled( false );
+            questionsButton.setEnabled( false );
             deleteButton.setEnabled( false );
 
             add( Components.heading( user.getFullName(), SwingConstants.CENTER ) );
 
-            add( passwordLabel );
+            add( passwordLabel = Components.label( SwingConstants.CENTER ) );
-            add( passwordField );
+            add( passwordField = Components.heading( SwingConstants.CENTER ) );
             passwordField.setForeground( Res.colors().highlightFg() );
             passwordField.setFont( Res.fonts().bigValueFont( SIZE_RESULT ) );
+            answerField = Components.heading( SwingConstants.CENTER );
+            answerField.setForeground( Res.colors().highlightFg() );
+            answerField.setFont( Res.fonts().bigValueFont( SIZE_RESULT ) );
             add( Box.createGlue() );
             add( Components.strut() );
 
-            add( queryLabel );
+            add( queryLabel = Components.label() );
             queryLabel.setText( strf( "%s's password for:", user.getFullName() ) );
-            add( queryField );
+            add( queryField = Components.textField( null, this::updateSites ) );
             queryField.putClientProperty( "JTextField.variant", "search" );
             queryField.addActionListener( event -> useSite() );
             queryField.addKeyListener( this );
             queryField.requestFocusInWindow();
             add( Components.strut() );
-            add( Components.scrollPane( sitesList ) );
+            add( Components.scrollPane( sitesList = Components.list(
-            sitesModel.registerList( sitesList );
+                    sitesModel = new CollectionListModel<MPSite<?>>().selection( this::showSiteResult ),
+                    this::getSiteDescription ) ) );
             add( Box.createGlue() );
 
             addHierarchyListener( e -> {
@@ -587,10 +590,56 @@ public class UserContentPanel extends JPanel implements MasterPassword.Listener,
                                 Components.textField( fileSite.getUrl(), fileSite::setUrl ),
                                 Components.strut() );
 
-            Components.showDialog( this, site.getSiteName(), new JOptionPane( Components.panel(
+            Components.showDialog( this, strf( "Settings for %s", site.getSiteName() ), new JOptionPane( Components.panel(
                     BoxLayout.PAGE_AXIS, components.build().toArray( new Component[0] ) ) ) );
         }
 
+        public void showSiteQuestions() {
+            MPSite<?> site = sitesModel.getSelectedItem();
+            if (site == null)
+                return;
+
+            CollectionListModel<MPQuestion> questionsModel = new CollectionListModel<MPQuestion>().selection( this::showQuestionResult );
+            JList<MPQuestion>               questionsList  = Components.list( questionsModel, MPQuestion::getKeyword );
+            JTextField queryField = Components.textField( null, query -> Res.job( () -> {
+                Collection<MPQuestion> questions = new LinkedList<>( site.findQuestions( query ) );
+
+                if (!Strings.isNullOrEmpty( query ))
+                    if (questions.stream().noneMatch( question -> question.getKeyword().equalsIgnoreCase( query ) ))
+                        questions.add( new MPNewQuestion( site, query ) );
+
+                Res.ui( () -> questionsModel.set( questions ) );
+            } ) );
+            queryField.putClientProperty( "JTextField.variant", "search" );
+            queryField.addActionListener( event -> useQuestion( questionsModel.getSelectedItem() ) );
+            queryField.addKeyListener( new KeyAdapter() {
+                @Override
+                public void keyPressed(final KeyEvent event) {
+                    if ((event.getKeyCode() == KeyEvent.VK_UP) || (event.getKeyCode() == KeyEvent.VK_DOWN))
+                        questionsList.dispatchEvent( event );
+                }
+
+                @Override
+                public void keyReleased(final KeyEvent event) {
+                    if ((event.getKeyCode() == KeyEvent.VK_UP) || (event.getKeyCode() == KeyEvent.VK_DOWN))
+                        questionsList.dispatchEvent( event );
+                }
+            } );
+
+            Components.showDialog( this, strf( "Recovery answers for %s", site.getSiteName() ), new JOptionPane( Components.panel(
+                    BoxLayout.PAGE_AXIS,
+                    Components.label( "Security Question Keyword:" ), queryField,
+                    Components.strut(),
+                    Components.label( "Answer:" ), answerField,
+                    Components.strut(),
+                    Components.scrollPane( questionsList ) ) ) {
+                @Override
+                public void selectInitialValue() {
+                    queryField.requestFocusInWindow();
+                }
+            } );
+        }
+
         public void deleteSite() {
             MPSite<?> site = sitesModel.getSelectedItem();
             if (site == null)
@@ -668,6 +717,7 @@ public class UserContentPanel extends JPanel implements MasterPassword.Listener,
                     passwordLabel.setText( " " );
                     passwordField.setText( " " );
                     settingsButton.setEnabled( false );
+                    questionsButton.setEnabled( false );
                     deleteButton.setEnabled( false );
                 } );
                 return;
@@ -683,6 +733,7 @@ public class UserContentPanel extends JPanel implements MasterPassword.Listener,
                         passwordLabel.setText( strf( "Your password for %s:", site.getSiteName() ) );
                         passwordField.setText( result );
                         settingsButton.setEnabled( true );
+                        questionsButton.setEnabled( true );
                         deleteButton.setEnabled( true );
                     } );
                 }
@@ -692,6 +743,66 @@ public class UserContentPanel extends JPanel implements MasterPassword.Listener,
             } );
         }
 
+        private void useQuestion(@Nullable final MPQuestion question) {
+            if (question instanceof MPNewQuestion) {
+                if (JOptionPane.YES_OPTION == JOptionPane.showConfirmDialog(
+                        this,
+                        strf( "<html>Remember the answer for the security question with keyword <strong>%s</strong>?</html>",
+                              question.getKeyword() ),
+                        "New Question", JOptionPane.YES_NO_OPTION )) {
+                    useQuestion( question.getSite().addQuestion( question.getKeyword() ) );
+                }
+                return;
+            }
+
+            showQuestionResult( question, result -> {
+                if (result == null)
+                    return;
+
+                if (question instanceof MPFileQuestion)
+                    ((MPFileQuestion) question).use();
+
+                Transferable clipboardContents = new StringSelection( result );
+                Toolkit.getDefaultToolkit().getSystemClipboard().setContents( clipboardContents, null );
+
+                Res.ui( () -> {
+                    Window answerDialog = SwingUtilities.windowForComponent( answerField );
+                    if (answerDialog instanceof Dialog)
+                        answerDialog.setVisible( false );
+
+                    Window window = SwingUtilities.windowForComponent( UserContentPanel.this );
+                    if (window instanceof Frame)
+                        ((Frame) window).setExtendedState( Frame.ICONIFIED );
+                } );
+            } );
+        }
+
+        private void showQuestionResult(@Nullable final MPQuestion question) {
+            showQuestionResult( question, null );
+        }
+
+        private void showQuestionResult(@Nullable final MPQuestion question, @Nullable final Consumer<String> resultCallback) {
+            if (question == null) {
+                if (resultCallback != null)
+                    resultCallback.accept( null );
+                Res.ui( () -> answerField.setText( " " ) );
+                return;
+            }
+
+            Res.job( () -> {
+                try {
+                    String answer = question.getAnswer();
+                    if (resultCallback != null)
+                        resultCallback.accept( answer );
+
+                    Res.ui( () -> answerField.setText( answer ) );
+                }
+                catch (final MPKeyUnavailableException | MPAlgorithmException e) {
+                    logger.err( e, "While resolving answer for: %s", question );
+                }
+            } );
+        }
+
         @Override
         public void keyTyped(final KeyEvent event) {
         }
@@ -713,13 +824,11 @@ public class UserContentPanel extends JPanel implements MasterPassword.Listener,
                 updateSitesJob.cancel( true );
 
             updateSitesJob = Res.job( () -> {
-                Collection<MPSite<?>> sites = new LinkedList<>();
+                Collection<MPSite<?>> sites = new LinkedList<>( user.findSites( query ) );
-                if (!Strings.isNullOrEmpty( query )) {
-                    sites.addAll( new LinkedList<>( user.findSites( query ) ) );
 
+                if (!Strings.isNullOrEmpty( query ))
                     if (sites.stream().noneMatch( site -> site.getSiteName().equalsIgnoreCase( query ) ))
                         sites.add( new MPNewSite( user, query ) );
-                }
 
                 Res.ui( () -> sitesModel.set( sites ) );
             } );

platform-independent/java/model/src/main/java/com/lyndir/masterpassword/model/MPQuestion.java

@@ -40,6 +40,13 @@ public interface MPQuestion extends Comparable<MPQuestion> {
 
     void setType(MPResultType type);
 
+    @Nonnull
+    default String getAnswer()
+            throws MPKeyUnavailableException, MPAlgorithmException {
+
+        return getAnswer( null );
+    }
+
     @Nonnull
     String getAnswer(@Nullable String state)
             throws MPKeyUnavailableException, MPAlgorithmException;

platform-independent/java/model/src/main/java/com/lyndir/masterpassword/model/MPSite.java

@@ -18,6 +18,7 @@
 
 package com.lyndir.masterpassword.model;
 
+import com.google.common.collect.ImmutableCollection;
 import com.google.common.primitives.UnsignedInteger;
 import com.lyndir.masterpassword.*;
 import java.util.Collection;
@@ -57,6 +58,7 @@ public interface MPSite<Q extends MPQuestion> extends Comparable<MPSite<?>> {
 
     void setLoginType(@Nullable MPResultType loginType);
 
+    @Nonnull
     default String getResult()
             throws MPKeyUnavailableException, MPAlgorithmException {
 
@@ -79,6 +81,16 @@ public interface MPSite<Q extends MPQuestion> extends Comparable<MPSite<?>> {
     String getResult(MPKeyPurpose keyPurpose, @Nullable String keyContext, @Nullable String state)
             throws MPKeyUnavailableException, MPAlgorithmException;
 
+    @Nonnull
+    String getResult(MPKeyPurpose keyPurpose, @Nullable String keyContext,
+                     @Nullable UnsignedInteger counter, MPResultType type, @Nullable String state)
+            throws MPKeyUnavailableException, MPAlgorithmException;
+
+    @Nonnull
+    String getState(MPKeyPurpose keyPurpose, @Nullable String keyContext,
+                    @Nullable UnsignedInteger counter, MPResultType type, String state)
+            throws MPKeyUnavailableException, MPAlgorithmException;
+
     @Nonnull
     default String getLogin()
             throws MPKeyUnavailableException, MPAlgorithmException {
@@ -94,10 +106,17 @@ public interface MPSite<Q extends MPQuestion> extends Comparable<MPSite<?>> {
     @Nonnull
     MPUser<?> getUser();
 
-    boolean addQuestion(Q question);
+    @Nonnull
+    Q addQuestion(String keyword);
+
+    @Nonnull
+    Q addQuestion(Q question);
 
     boolean deleteQuestion(Q question);
 
     @Nonnull
     Collection<Q> getQuestions();
+
+    @Nonnull
+    ImmutableCollection<Q> findQuestions(@Nullable String query);
 }

platform-independent/java/model/src/main/java/com/lyndir/masterpassword/model/MPUser.java

@@ -100,6 +100,7 @@ public interface MPUser<S extends MPSite<?>> extends Comparable<MPUser<?>> {
 
     // - Relations
 
+    @Nonnull
     S addSite(String siteName);
 
     @Nonnull

platform-independent/java/model/src/main/java/com/lyndir/masterpassword/model/impl/MPBasicQuestion.java

@@ -22,6 +22,7 @@ import static com.lyndir.lhunath.opal.system.util.StringUtils.*;
 
 import com.lyndir.masterpassword.*;
 import com.lyndir.masterpassword.model.MPQuestion;
+import com.lyndir.masterpassword.model.MPSite;
 import java.util.Objects;
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
@@ -33,14 +34,23 @@ import org.jetbrains.annotations.NotNull;
  */
 public abstract class MPBasicQuestion extends Changeable implements MPQuestion {
 
+    private final MPSite<?> site;
     private final String       keyword;
+
     private MPResultType type;
 
-    protected MPBasicQuestion(final String keyword, final MPResultType type) {
+    protected MPBasicQuestion(final MPSite<?> site, final String keyword, final MPResultType type) {
+        this.site = site;
         this.keyword = keyword;
         this.type = type;
     }
 
+    @Nonnull
+    @Override
+    public MPSite<?> getSite() {
+        return site;
+    }
+
     @Nonnull
     @Override
     public String getKeyword() {
@@ -55,7 +65,7 @@ public abstract class MPBasicQuestion extends Changeable implements MPQuestion {
 
     @Override
     public void setType(final MPResultType type) {
-        if (Objects.equals(this.type, type))
+        if (this.type == type)
             return;
 
         this.type = type;
@@ -70,15 +80,12 @@ public abstract class MPBasicQuestion extends Changeable implements MPQuestion {
         return getSite().getResult( MPKeyPurpose.Recovery, getKeyword(), null, getType(), state );
     }
 
-    @Nonnull
-    @Override
-    public abstract MPBasicSite<?, ?> getSite();
-
     @Override
     protected void onChanged() {
         super.onChanged();
 
-        getSite().setChanged();
+        if (site instanceof Changeable)
+            ((Changeable) site).setChanged();
     }
 
     @Override

platform-independent/java/model/src/main/java/com/lyndir/masterpassword/model/impl/MPBasicSite.java

@@ -21,6 +21,9 @@ package com.lyndir.masterpassword.model.impl;
 import static com.lyndir.lhunath.opal.system.util.ObjectUtils.*;
 import static com.lyndir.lhunath.opal.system.util.StringUtils.*;
 
+import com.google.common.base.Strings;
+import com.google.common.collect.ImmutableCollection;
+import com.google.common.collect.ImmutableSortedSet;
 import com.google.common.primitives.UnsignedInteger;
 import com.lyndir.masterpassword.*;
 import com.lyndir.masterpassword.model.*;
@@ -35,9 +38,9 @@ import javax.annotation.Nullable;
 public abstract class MPBasicSite<U extends MPUser<?>, Q extends MPQuestion> extends Changeable
         implements MPSite<Q> {
 
-    private final Collection<Q> questions = new LinkedHashSet<>();
     private final U             user;
     private final String        siteName;
+    private final Collection<Q> questions = new LinkedHashSet<>();
 
     private MPAlgorithm     algorithm;
     private UnsignedInteger counter;
@@ -104,7 +107,7 @@ public abstract class MPBasicSite<U extends MPUser<?>, Q extends MPQuestion> ext
 
     @Override
     public void setResultType(final MPResultType resultType) {
-        if (Objects.equals( this.resultType, resultType ))
+        if (this.resultType == resultType)
             return;
 
         this.resultType = resultType;
@@ -119,7 +122,7 @@ public abstract class MPBasicSite<U extends MPUser<?>, Q extends MPQuestion> ext
 
     @Override
     public void setLoginType(@Nullable final MPResultType loginType) {
-        if (Objects.equals( this.loginType, loginType ))
+        if (this.loginType == loginType)
             return;
 
         this.loginType = ifNotNullElse( loginType, getAlgorithm().mpw_default_login_type() );
@@ -134,7 +137,9 @@ public abstract class MPBasicSite<U extends MPUser<?>, Q extends MPQuestion> ext
         return getResult( keyPurpose, keyContext, getCounter(), getResultType(), state );
     }
 
-    protected String getResult(final MPKeyPurpose keyPurpose, @Nullable final String keyContext,
+    @Nonnull
+    @Override
+    public String getResult(final MPKeyPurpose keyPurpose, @Nullable final String keyContext,
                             @Nullable final UnsignedInteger counter, final MPResultType type, @Nullable final String state)
             throws MPKeyUnavailableException, MPAlgorithmException {
 
@@ -143,7 +148,9 @@ public abstract class MPBasicSite<U extends MPUser<?>, Q extends MPQuestion> ext
                 keyPurpose, keyContext, type, state );
     }
 
-    protected String getState(final MPKeyPurpose keyPurpose, @Nullable final String keyContext,
+    @Nonnull
+    @Override
+    public String getState(final MPKeyPurpose keyPurpose, @Nullable final String keyContext,
                            @Nullable final UnsignedInteger counter, final MPResultType type, final String state)
             throws MPKeyUnavailableException, MPAlgorithmException {
 
@@ -160,13 +167,13 @@ public abstract class MPBasicSite<U extends MPUser<?>, Q extends MPQuestion> ext
         return getResult( MPKeyPurpose.Identification, null, null, getLoginType(), state );
     }
 
+    @Nonnull
     @Override
-    public boolean addQuestion(final Q question) {
+    public Q addQuestion(final Q question) {
-        if (!questions.add( question ))
+        questions.add( question );
-            return false;
 
         setChanged();
-        return true;
+        return question;
     }
 
     @Override
@@ -184,6 +191,17 @@ public abstract class MPBasicSite<U extends MPUser<?>, Q extends MPQuestion> ext
         return Collections.unmodifiableCollection( questions );
     }
 
+    @Nonnull
+    @Override
+    public ImmutableCollection<Q> findQuestions(@Nullable final String query) {
+        ImmutableSortedSet.Builder<Q> results = ImmutableSortedSet.naturalOrder();
+        for (final Q question : getQuestions())
+            if (Strings.isNullOrEmpty( query ) || question.getKeyword().startsWith( query ))
+                results.add( question );
+
+        return results.build();
+    }
+
     @Nonnull
     @Override
     public U getUser() {

platform-independent/java/model/src/main/java/com/lyndir/masterpassword/model/impl/MPBasicUser.java

@@ -20,6 +20,7 @@ package com.lyndir.masterpassword.model.impl;
 
 import static com.lyndir.lhunath.opal.system.util.StringUtils.*;
 
+import com.google.common.base.Strings;
 import com.google.common.collect.ImmutableCollection;
 import com.google.common.collect.ImmutableSortedSet;
 import com.lyndir.lhunath.opal.system.CodeUtils;
@@ -202,9 +203,8 @@ public abstract class MPBasicUser<S extends MPBasicSite<?, ?>> extends Changeabl
     @Override
     public ImmutableCollection<S> findSites(@Nullable final String query) {
         ImmutableSortedSet.Builder<S> results = ImmutableSortedSet.naturalOrder();
-        if (query != null)
         for (final S site : getSites())
-                if (site.getSiteName().startsWith( query ))
+            if (Strings.isNullOrEmpty( query ) || site.getSiteName().startsWith( query ))
                 results.add( site );
 
         return results.build();

platform-independent/java/model/src/main/java/com/lyndir/masterpassword/model/impl/MPFileQuestion.java

@@ -30,16 +30,13 @@ import javax.annotation.Nullable;
  */
 public class MPFileQuestion extends MPBasicQuestion {
 
-    private final MPFileSite site;
-
     @Nullable
     private String answerState;
 
     public MPFileQuestion(final MPFileSite site, final String keyword,
                           @Nullable final MPResultType type, @Nullable final String answerState) {
-        super( keyword, ifNotNullElse( type, site.getAlgorithm().mpw_default_answer_type() ) );
+        super( site, keyword, ifNotNullElse( type, site.getAlgorithm().mpw_default_answer_type() ) );
 
-        this.site = site;
         this.answerState = answerState;
     }
 
@@ -48,6 +45,8 @@ public class MPFileQuestion extends MPBasicQuestion {
         return answerState;
     }
 
+    @Nonnull
+    @Override
     public String getAnswer()
             throws MPKeyUnavailableException, MPAlgorithmException {
         return getAnswer( answerState );
@@ -66,9 +65,8 @@ public class MPFileQuestion extends MPBasicQuestion {
         setChanged();
     }
 
-    @Nonnull
+    public void use() {
-    @Override
+        if (getSite() instanceof MPFileSite)
-    public MPFileSite getSite() {
+            ((MPFileSite) getSite()).use();
-        return site;
     }
 }

platform-independent/java/model/src/main/java/com/lyndir/masterpassword/model/impl/MPFileSite.java

@@ -145,6 +145,12 @@ public class MPFileSite extends MPBasicSite<MPFileUser, MPFileQuestion> {
         setChanged();
     }
 
+    @Nonnull
+    @Override
+    public MPFileQuestion addQuestion(final String keyword) {
+        return addQuestion( new MPFileQuestion( this, keyword, null, null ) );
+    }
+
     @Override
     public int compareTo(@Nonnull final MPSite<?> o) {
         int comparison = (o instanceof MPFileSite)? ((MPFileSite) o).getLastUsed().compareTo( getLastUsed() ): 0;

platform-independent/java/model/src/main/java/com/lyndir/masterpassword/model/impl/MPFileUser.java

@@ -207,6 +207,7 @@ public class MPFileUser extends MPBasicUser<MPFileSite> {
         super.reset();
     }
 
+    @Nonnull
     @Override
     public MPFileSite addSite(final String siteName) {
         return addSite( new MPFileSite( this, siteName ) );

public/site

@@ -1 +1 @@
-Subproject commit b190b45756666da71fa8037501530b14c609be24
+Subproject commit 0623231ad5614d5e6541199fd755589f04e214cb