[users] Migrate reuse-password and password-strength to Config

- add the "reuse user password for root" setting to Config,
  make the UI page follow that setting.
- add the require-strong-password default and toggle settings to
  Config; this is not well-checked yet.

On the widget / UI side, connect checkboxes only if they are
visible; refactor reuse-user-password-for-root settings.

src/modules/users/Config.cpp

@@ -343,6 +343,27 @@ Config::setAutoLogin( bool b )
     }
 }
 
+void
+Config::setReuseUserPasswordForRoot( bool reuse )
+{
+    if ( reuse != m_reuseUserPasswordForRoot )
+    {
+        m_reuseUserPasswordForRoot = reuse;
+        emit reuseUserPasswordForRootChanged( reuse );
+    }
+}
+
+void
+Config::setRequireStrongPasswords( bool strong )
+{
+    if ( strong != m_requireStrongPasswords )
+    {
+        m_requireStrongPasswords = strong;
+        emit requireStrongPasswordsChanged( strong );
+    }
+}
+
+
 STATICTEST void
 setConfigurationDefaultGroups( const QVariantMap& map, QStringList& defaultGroups )
 {
@@ -377,4 +398,10 @@ Config::setConfigurationMap( const QVariantMap& configurationMap )
 
     m_writeRootPassword = CalamaresUtils::getBool( configurationMap, "setRootPassword", true );
     Calamares::JobQueue::instance()->globalStorage()->insert( "setRootPassword", m_writeRootPassword );
+
+    m_reuseUserPasswordForRoot = CalamaresUtils::getBool( configurationMap, "doReusePassword", false );
+
+    m_permitWeakPasswords = CalamaresUtils::getBool( configurationMap, "allowWeakPasswords", false );
+    m_requireStrongPasswords
+        = !m_permitWeakPasswords || !CalamaresUtils::getBool( configurationMap, "allowWeakPasswordsDefault", false );
 }

src/modules/users/Config.h

@@ -42,6 +42,14 @@ class Config : public QObject
     Q_PROPERTY( QString hostName READ hostName WRITE setHostName NOTIFY hostNameChanged )
     Q_PROPERTY( QString hostNameStatus READ hostNameStatus NOTIFY hostNameStatusChanged )
 
+    Q_PROPERTY( bool writeRootPassword READ writeRootPassword CONSTANT )
+    Q_PROPERTY( bool reuseUserPasswordForRoot READ reuseUserPasswordForRoot WRITE setReuseUserPasswordForRoot NOTIFY
+                    reuseUserPasswordForRootChanged )
+
+    Q_PROPERTY( bool permitWeakPasswords READ permitWeakPasswords CONSTANT )
+    Q_PROPERTY( bool requireStrongPasswords READ requireStrongPasswords WRITE setRequireStrongPasswords NOTIFY
+                    requireStrongPasswordsChanged )
+
 public:
     Config( QObject* parent = nullptr );
     ~Config();
@@ -76,6 +84,12 @@ public:
     bool doAutoLogin() const { return m_doAutoLogin; }
     /// Should the root password be written (if false, no password is set and the root account is disabled for login)
     bool writeRootPassword() const { return m_writeRootPassword; }
+    /// Should the user's password be used for root, too? (if root is written at all)
+    bool reuseUserPasswordForRoot() const { return m_reuseUserPasswordForRoot; }
+    /// Show UI to change the "require strong password" setting?
+    bool permitWeakPasswords() const { return m_permitWeakPasswords; }
+    /// Current setting for "require strong password"?
+    bool requireStrongPasswords() const { return m_requireStrongPasswords; }
 
     const QStringList& defaultGroups() const { return m_defaultGroups; }
 
@@ -109,6 +123,11 @@ public Q_SLOTS:
     /// Sets the autologin flag
     void setAutoLogin( bool b );
 
+    /// Set to true to use the user password, unchanged, for root too
+    void setReuseUserPasswordForRoot( bool reuse );
+    /// Change setting for "require strong password"
+    void setRequireStrongPasswords( bool strong );
+
 signals:
     void userShellChanged( const QString& );
     void autologinGroupChanged( const QString& );
@@ -119,6 +138,8 @@ signals:
     void hostNameChanged( const QString& );
     void hostNameStatusChanged( const QString& );
     void autoLoginChanged( bool );
+    void reuseUserPasswordForRootChanged( bool );
+    void requireStrongPasswordsChanged( bool );
 
 private:
     QStringList m_defaultGroups;
@@ -129,7 +150,12 @@ private:
     QString m_loginName;
     QString m_hostName;
     bool m_doAutoLogin = false;
+
     bool m_writeRootPassword = true;
+    bool m_reuseUserPasswordForRoot = false;
+
+    bool m_permitWeakPasswords = false;
+    bool m_requireStrongPasswords = true;
 
     bool m_customLoginName = false;
     bool m_customHostName = false;

src/modules/users/UsersPage.cpp

@@ -105,6 +105,12 @@ UsersPage::UsersPage( Config* config, QWidget* parent )
 {
     ui->setupUi( this );
 
+    ui->checkBoxReusePassword->setVisible( m_config->writeRootPassword() );
+    ui->checkBoxReusePassword->setChecked( m_config->reuseUserPasswordForRoot() );
+
+    ui->checkBoxValidatePassword->setVisible( m_config->permitWeakPasswords() );
+    ui->checkBoxValidatePassword->setChecked( m_config->requireStrongPasswords() );
+
     // Connect signals and slots
     connect( ui->textBoxUserPassword, &QLineEdit::textChanged, this, &UsersPage::onPasswordTextChanged );
     connect( ui->textBoxUserVerifiedPassword, &QLineEdit::textChanged, this, &UsersPage::onPasswordTextChanged );
@@ -115,21 +121,7 @@ UsersPage::UsersPage( Config* config, QWidget* parent )
         onRootPasswordTextChanged( ui->textBoxRootPassword->text() );
         checkReady( isReady() );
     } );
-    connect( ui->checkBoxReusePassword, &QCheckBox::stateChanged, this, [this]( const int checked ) {
-        /* When "reuse" is checked, hide the fields for explicitly
-         * entering the root password. However, if we're going to
-         * disable the root password anyway, hide them all regardless of
-         * the checkbox -- so when writeRoot is false, checked needs
-         * to be true, to hide them all.
-         */
-        const bool visible = m_config->writeRootPassword() ? !checked : false;
-        ui->labelChooseRootPassword->setVisible( visible );
-        ui->labelRootPassword->setVisible( visible );
-        ui->labelRootPasswordError->setVisible( visible );
-        ui->textBoxRootPassword->setVisible( visible );
-        ui->textBoxVerifiedRootPassword->setVisible( visible );
-        checkReady( isReady() );
-    } );
+    connect( ui->checkBoxReusePassword, &QCheckBox::stateChanged, this, &UsersPage::onReuseUserPasswordChanged );
 
     connect( ui->textBoxFullName, &QLineEdit::textEdited, config, &Config::setFullName );
     connect( config, &Config::fullNameChanged, this, &UsersPage::onFullNameTextEdited );
@@ -147,13 +139,25 @@ UsersPage::UsersPage( Config* config, QWidget* parent )
     } );
     connect( config, &Config::autoLoginChanged, ui->checkBoxDoAutoLogin, &QCheckBox::setChecked );
 
-    ui->checkBoxReusePassword->setVisible( m_config->writeRootPassword() );
-    ui->checkBoxReusePassword->setChecked( true );
-    ui->checkBoxValidatePassword->setChecked( true );
+    if ( m_config->writeRootPassword() )
+    {
+        connect( ui->checkBoxReusePassword, &QCheckBox::stateChanged, this, [this]( int checked ) {
+            m_config->setReuseUserPasswordForRoot( checked != Qt::Unchecked );
+        } );
+        connect( config, &Config::reuseUserPasswordForRootChanged, ui->checkBoxReusePassword, &QCheckBox::setChecked );
+    }
 
-    setPasswordCheckboxVisible( false );
+    if ( m_config->permitWeakPasswords() )
+    {
+        connect( ui->checkBoxValidatePassword, &QCheckBox::stateChanged, this, [this]( int checked ) {
+            m_config->setRequireStrongPasswords( checked != Qt::Unchecked );
+        } );
+        connect( config, &Config::requireStrongPasswordsChanged, ui->checkBoxValidatePassword, &QCheckBox::setChecked );
+    }
 
     CALAMARES_RETRANSLATE_SLOT( &UsersPage::retranslate );
+
+    onReuseUserPasswordChanged( m_config->reuseUserPasswordForRoot() );
 }
 
 UsersPage::~UsersPage()
@@ -335,25 +339,26 @@ UsersPage::onRootPasswordTextChanged( const QString& )
     emit checkReady( isReady() );
 }
 
-
 void
-UsersPage::setPasswordCheckboxVisible( bool visible )
+UsersPage::onReuseUserPasswordChanged( const int checked )
 {
-    ui->checkBoxValidatePassword->setVisible( visible );
-}
-
-void
-UsersPage::setValidatePasswordDefault( bool checked )
-{
-    ui->checkBoxValidatePassword->setChecked( checked );
-    emit checkReady( isReady() );
-}
-
-void
-UsersPage::setReusePasswordDefault( bool checked )
-{
-    ui->checkBoxReusePassword->setChecked( checked );
-    emit checkReady( isReady() );
+    /* When "reuse" is checked, hide the fields for explicitly
+     * entering the root password. However, if we're going to
+     * disable the root password anyway, hide them all regardless of
+     * the checkbox -- so when writeRoot is false, visible needs
+     * to be false, to hide them all.
+     *
+     * In principle this is only connected when writeRootPassword is @c true,
+     * but it is **always** called at least once in the constructor
+     * to set up initial visibility.
+     */
+    const bool visible = m_config->writeRootPassword() ? !checked : false;
+    ui->labelChooseRootPassword->setVisible( visible );
+    ui->labelRootPassword->setVisible( visible );
+    ui->labelRootPasswordError->setVisible( visible );
+    ui->textBoxRootPassword->setVisible( visible );
+    ui->textBoxVerifiedRootPassword->setVisible( visible );
+    checkReady( isReady() );
 }
 
 void

src/modules/users/UsersPage.h

@@ -50,10 +50,6 @@ public:
 
     void onActivate();
 
-    void setPasswordCheckboxVisible( bool visible );
-    void setValidatePasswordDefault( bool checked );
-    void setReusePasswordDefault( bool checked );
-
     /** @brief Process entries in the passwordRequirements config entry
      *
      * Called once for each item in the config entry, which should
@@ -73,6 +69,7 @@ protected slots:
     void reportHostNameStatus( const QString& );
     void onPasswordTextChanged( const QString& );
     void onRootPasswordTextChanged( const QString& );
+    void onReuseUserPasswordChanged( const int );
 
 signals:
     void checkReady( bool );

src/modules/users/UsersViewStep.cpp

@@ -174,8 +174,6 @@ UsersViewStep::setConfigurationMap( const QVariantMap& configurationMap )
     (void)this->widget();
     using CalamaresUtils::getBool;
 
-    m_widget->setReusePasswordDefault( getBool( configurationMap, "doReusePassword", false ) );
-
     if ( configurationMap.contains( "passwordRequirements" )
          && configurationMap.value( "passwordRequirements" ).type() == QVariant::Map )
     {
@@ -187,9 +185,6 @@ UsersViewStep::setConfigurationMap( const QVariantMap& configurationMap )
         }
     }
 
-    m_widget->setPasswordCheckboxVisible( getBool( configurationMap, "allowWeakPasswords", false ) );
-    m_widget->setValidatePasswordDefault( !getBool( configurationMap, "allowWeakPasswordsDefault", false ) );
-
     using Action = SetHostNameJob::Action;
 
     QString hostnameActionString = CalamaresUtils::getString( configurationMap, "setHostname" );