Umbau auf Pure-FTPd mit PureDB Virtual Users und Passwort-Dialog

- Komplett auf Pure-FTPd umgestellt (weg von vsftpd)
- PureDB virtuelle Benutzer: jeder User sieht nur seine Freigaben
- Per-User Bind-Mounts mit Read-Only/Read-Write Durchsetzung
- Passwort-Dialog beim Anlegen neuer FTP-Benutzer
- Change-Password UI: Dropdown + Button zum Passwort ändern
- Setup-Kommando für automatische Pure-FTPd Einrichtung
- Anonymous-Checkbox entfernt (nur authentifizierte User)
- sudoers-Fix: $SUDO_USER statt $USER bei sudo-Ausführung
- openssl passwd statt pure-pw stdin für GUI-Kompatibilität

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

README.md

@@ -9,80 +9,63 @@ Ein KDE Dolphin Properties-Dialog Plugin zum Erstellen und Verwalten von FTP-Fre
 - **FTP-Tab** in Dolphins Ordner-Eigenschaften (Rechtsklick → Eigenschaften)
 - Freigabe per Checkbox aktivieren/deaktivieren
 - Freigabename konfigurierbar (Standard = Ordnername)
-- Anonymen Zugang erlauben
+- **Per-User Berechtigungen**: Read Only / Read-Write pro Benutzer
-- Berechtigungen pro Benutzer: Read Only / Read-Write
+- Jeder Benutzer sieht **nur seine freigegebenen Ordner** per FTP
-- Nutzt das Helper-Script `dolphin-ftp-share` — **kein Root nötig!**
+- Read-Only wird direkt am Dateisystem durchgesetzt (read-only Bind-Mount)
-- Erkennt bestehende Freigaben und lädt deren Einstellungen
+- Automatische Einrichtung mit `dolphin-ftp-share setup`
 
 ## Voraussetzungen
 
-- Ein FTP-Server (z.B. `vsftpd`)
+- Pure-FTPd als FTP-Server
 - Das Helper-Script `dolphin-ftp-share` im PATH
 - Build-Dependencies (siehe unten)
 
-### FTP-Server installieren (vsftpd)
+## Einrichtung
+
+### 1. Pure-FTPd installieren
 
 ```bash
-sudo apt install vsftpd
+sudo apt install pure-ftpd
 ```
 
-### vsftpd konfigurieren
+### 2. Helper-Script installieren
-
-In `/etc/vsftpd.conf`:
-
-```ini
-listen=YES
-anonymous_enable=YES
-local_enable=YES
-write_enable=YES
-anon_root=/home/DEIN_USER/.local/share/dolphin-ftp-root
-local_root=/home/DEIN_USER/.local/share/dolphin-ftp-root
-chroot_local_user=YES
-allow_writeable_chroot=YES
-pasv_enable=NO
-port_enable=YES
-connect_from_port_20=YES
-
-# Logging
-xferlog_enable=YES
-xferlog_std_format=NO
-log_ftp_protocol=YES
-vsftpd_log_file=/var/log/vsftpd.log
-```
-
-Danach: `sudo systemctl restart vsftpd`
-
-### Logdatei
-
-vsftpd schreibt alle FTP-Aktivitäten (Logins, Uploads, Downloads, Fehler) in `/var/log/vsftpd.log`.
-
-```bash
-# Logs live verfolgen:
-sudo tail -f /var/log/vsftpd.log
-```
-
-### Helper-Script installieren
 
 ```bash
 sudo cp scripts/dolphin-ftp-share /usr/local/bin/
 sudo chmod +x /usr/local/bin/dolphin-ftp-share
 ```
 
-### sudo für Bind-Mounts erlauben
+### 3. Automatisches Setup
 
-Das Helper-Script nutzt `sudo mount --bind` und `sudo umount`, um Ordner in das FTP-Root einzubinden (Symlinks funktionieren nicht in vsftpd's chroot-Umgebung).
+Das Setup konfiguriert Pure-FTPd komplett und erstellt die sudoers-Regel:
-
-Damit das ohne Passwort-Eingabe funktioniert:
 
 ```bash
-sudo visudo -f /etc/sudoers.d/dolphin-ftp-share
+sudo dolphin-ftp-share setup
 ```
 
-Folgendes eintragen (DEIN_USER ersetzen):
+Das macht automatisch:
+- Aktiviert PureDB-Authentifizierung (virtuelle FTP-Benutzer)
+- Deaktiviert System-Login und anonymen Zugang
+- Aktiviert Chroot (jeder sieht nur seine Ordner)
+- Erstellt sudoers-Regel für mount/umount/pure-pw
+- Aktiviert Logging
+- Startet Pure-FTPd neu
 
+### 4. FTP-Passwörter setzen
+
+FTP-Benutzer werden beim ersten Freigeben automatisch erstellt (Standard-Passwort = Benutzername). Passwort ändern:
+
+```bash
+dolphin-ftp-share passwd <benutzername> <neues-passwort>
 ```
-DEIN_USER ALL=(root) NOPASSWD: /usr/bin/mount --bind *
+
-DEIN_USER ALL=(root) NOPASSWD: /usr/bin/umount /home/DEIN_USER/.local/share/dolphin-ftp-root/*
+### Logging
+
+Pure-FTPd loggt über syslog:
+
+```bash
+# Logs live verfolgen:
+sudo tail -f /var/log/syslog | grep pure-ftpd
 ```
 
 ## Versionen
@@ -165,8 +148,12 @@ sudo rm /usr/lib/x86_64-linux-gnu/qt5/plugins/kf5/propertiesdialog/ftpshareplugi
 # KF6
 sudo rm /usr/lib/x86_64-linux-gnu/qt6/plugins/kf6/propertiesdialog/ftpshareplugin.so
 
-# Helper-Script
+# Helper-Script & sudoers
 sudo rm /usr/local/bin/dolphin-ftp-share
+sudo rm /etc/sudoers.d/dolphin-ftp-share
+
+# Pure-FTPd (optional)
+sudo apt remove pure-ftpd
 ```
 
 ## Projektstruktur
@@ -196,28 +183,31 @@ kde-dolphin-ftp-sharing-tab/
 
 ## Wie es funktioniert
 
-Das Plugin nutzt das Helper-Script `dolphin-ftp-share`:
+1. **Rechtsklick auf Ordner → Eigenschaften → FTP-Tab**
+2. Freigabe aktivieren, Berechtigungen pro Benutzer setzen (Read Only / Read-Write)
+3. Beim Anwenden ruft das Plugin `dolphin-ftp-share add` auf
+4. Das Helper-Script:
+   - Erstellt für jeden Benutzer ein persönliches FTP-Root (`~/.local/share/dolphin-ftp-root/users/<name>/`)
+   - Bind-mounted den freigegebenen Ordner dorthin
+   - Read-Only Freigaben werden als read-only Bind-Mount gemountet
+   - Erstellt automatisch virtuelle Pure-FTPd-Benutzer (PureDB)
+5. **Jeder FTP-Benutzer sieht nur seine freigegebenen Ordner** — durch Chroot auf sein persönliches FTP-Root
 
-- `dolphin-ftp-share add <name> <path> <anonymous> <acl>` — Freigabe erstellen
+### Kommandos
-- `dolphin-ftp-share delete <name>` — Freigabe löschen
-- `dolphin-ftp-share info` — bestehende Freigaben auflisten
 
-Das Script speichert Freigabe-Konfigurationen in `~/.local/share/dolphin-ftp-shares/` und erstellt Bind-Mounts in `~/.local/share/dolphin-ftp-root/`. Der FTP-Server (z.B. vsftpd) dient dieses Root-Verzeichnis aus.
+| Kommando | Beschreibung |
-
+|---|---|
-### Konfigurationsformat
+| `dolphin-ftp-share setup` | Einmalige Pure-FTPd Einrichtung |
-
+| `dolphin-ftp-share add <name> <path> <acl>` | Freigabe erstellen |
-Jede Freigabe wird als `.conf`-Datei gespeichert:
+| `dolphin-ftp-share delete <name>` | Freigabe löschen |
-
+| `dolphin-ftp-share info` | Bestehende Freigaben auflisten |
-```ini
+| `dolphin-ftp-share passwd <user> <pass>` | FTP-Passwort ändern |
-path=/pfad/zum/ordner
-anonymous=y
-user_acl=user1:rw,user2:ro
-```
 
 ### Berechtigungen
 
 | Level | Beschreibung |
 |---|---|
+| `---` | Kein Zugriff — Ordner ist für diesen Benutzer nicht sichtbar |
 | `ro` | Read Only — nur Download |
 | `rw` | Read-Write — Upload und Download |
 

kf5/src/ftpshareplugin.cpp

@@ -5,7 +5,9 @@
 
 #include <QFormLayout>
 #include <QGroupBox>
+#include <QInputDialog>
 #include <QLabel>
+#include <QMessageBox>
 #include <QProcess>
 #include <QScrollArea>
 #include <QVBoxLayout>
@@ -37,6 +39,26 @@ static int indexForAcl(const QString &acl)
     return 0;
 }
 
+// Check if a virtual FTP user exists
+static bool ftpUserExists(const QString &username)
+{
+    QProcess proc;
+    proc.start(QStringLiteral("dolphin-ftp-share"),
+               {QStringLiteral("userexists"), username});
+    proc.waitForFinished(5000);
+    return proc.exitCode() == 0;
+}
+
+// Create a virtual FTP user with password
+static bool createFtpUser(const QString &username, const QString &password)
+{
+    QProcess proc;
+    proc.start(QStringLiteral("dolphin-ftp-share"),
+               {QStringLiteral("passwd"), username, password});
+    proc.waitForFinished(5000);
+    return proc.exitCode() == 0;
+}
+
 // Get list of local users (UID >= 1000, excluding nobody)
 static QStringList getLocalUsers()
 {
@@ -89,13 +111,8 @@ FtpSharePlugin::FtpSharePlugin(QObject *parent, const QVariantList &args)
     nameLayout->addRow(i18n("Name:"), m_nameEdit);
     mainLayout->addLayout(nameLayout);
 
-    // Anonymous access
-    m_anonymousCheckBox = new QCheckBox(i18n("Allow Anonymous Access"));
-    mainLayout->addWidget(m_anonymousCheckBox);
-
     // User permissions section
-    auto *usersGroup = new QGroupBox();
+    auto *usersGroup = new QGroupBox(i18n("User Permissions"));
-    usersGroup->setFlat(true);
     auto *usersLayout = new QVBoxLayout(usersGroup);
 
     // Scroll area for user list
@@ -123,6 +140,18 @@ FtpSharePlugin::FtpSharePlugin(QObject *parent, const QVariantList &args)
     usersLayout->addWidget(scrollArea);
     mainLayout->addWidget(usersGroup);
 
+    // Change password section
+    auto *pwGroup = new QGroupBox(i18n("FTP Password"));
+    auto *pwLayout = new QHBoxLayout(pwGroup);
+    m_pwUserCombo = new QComboBox();
+    m_pwUserCombo->addItems(users);
+    auto *pwButton = new QPushButton(i18n("Change Password..."));
+    pwLayout->addWidget(m_pwUserCombo);
+    pwLayout->addWidget(pwButton);
+    mainLayout->addWidget(pwGroup);
+
+    connect(pwButton, &QPushButton::clicked, this, &FtpSharePlugin::onChangePassword);
+
     mainLayout->addStretch();
 
     // Connect signals
@@ -130,8 +159,6 @@ FtpSharePlugin::FtpSharePlugin(QObject *parent, const QVariantList &args)
             this, &FtpSharePlugin::onShareToggled);
     connect(m_nameEdit, &QLineEdit::textChanged,
             this, [this]() { setDirty(true); });
-    connect(m_anonymousCheckBox, &QCheckBox::toggled,
-            this, [this]() { setDirty(true); });
 
     // Load existing share info
     loadCurrentShare();
@@ -146,7 +173,6 @@ FtpSharePlugin::FtpSharePlugin(QObject *parent, const QVariantList &args)
 void FtpSharePlugin::onShareToggled(bool checked)
 {
     m_nameEdit->setEnabled(checked);
-    m_anonymousCheckBox->setEnabled(checked);
     m_usersWidget->setEnabled(checked);
     setDirty(true);
 }
@@ -167,12 +193,10 @@ void FtpSharePlugin::loadCurrentShare()
     // Format:
     // [sharename]
     // path=/some/path
-    // anonymous=y
     // user_acl=user1:rw,user2:ro
     QString currentSection;
     QString sharePath;
     QString shareAcl;
-    QString anonymous;
 
     const QStringList lines = output.split(QLatin1Char('\n'));
     for (const QString &line : lines) {
@@ -185,13 +209,10 @@ void FtpSharePlugin::loadCurrentShare()
             currentSection = line.mid(1, line.indexOf(QLatin1Char(']')) - 1);
             sharePath.clear();
             shareAcl.clear();
-            anonymous.clear();
         } else if (line.startsWith(QLatin1String("path="))) {
             sharePath = line.mid(5);
         } else if (line.startsWith(QLatin1String("user_acl="))) {
             shareAcl = line.mid(9);
-        } else if (line.startsWith(QLatin1String("anonymous="))) {
-            anonymous = line.mid(10);
         }
     }
 
@@ -204,7 +225,6 @@ void FtpSharePlugin::loadCurrentShare()
     m_originalShareName = currentSection;
     m_shareCheckBox->setChecked(true);
     m_nameEdit->setText(currentSection);
-    m_anonymousCheckBox->setChecked(anonymous == QLatin1String("y"));
 
     // Parse ACL: "user1:rw,user2:ro"
     if (!shareAcl.isEmpty()) {
@@ -257,6 +277,41 @@ void FtpSharePlugin::applyChanges()
         proc.waitForFinished(5000);
     }
 
+    // Create FTP users for users that have permissions but no FTP account yet
+    for (const auto &up : m_userPerms) {
+        if (up.combo->currentIndex() == 0)
+            continue; // No permission set, skip
+
+        if (ftpUserExists(up.username))
+            continue; // Already has FTP account
+
+        // Ask for FTP password
+        bool ok = false;
+        const QString password = QInputDialog::getText(
+            m_page,
+            i18n("FTP Password"),
+            i18n("Set FTP password for user '%1':", up.username),
+            QLineEdit::Password,
+            QString(),
+            &ok);
+
+        if (!ok || password.isEmpty()) {
+            QMessageBox::warning(m_page,
+                i18n("FTP Share"),
+                i18n("No password set for '%1'. This user will be skipped.", up.username));
+            up.combo->setCurrentIndex(0);
+            continue;
+        }
+
+        if (!createFtpUser(up.username, password)) {
+            QMessageBox::warning(m_page,
+                i18n("FTP Share"),
+                i18n("Failed to create FTP user '%1'.", up.username));
+            up.combo->setCurrentIndex(0);
+            continue;
+        }
+    }
+
     // Build ACL string
     QStringList aclParts;
     for (const auto &up : m_userPerms) {
@@ -267,14 +322,11 @@ void FtpSharePlugin::applyChanges()
     }
 
     const QString aclString = aclParts.join(QLatin1Char(','));
-    const QString anonymous = m_anonymousCheckBox->isChecked()
-                                  ? QStringLiteral("y")
-                                  : QStringLiteral("n");
 
-    // dolphin-ftp-share add <name> <path> <anonymous> <acl>
+    // dolphin-ftp-share add <name> <path> <acl>
     QProcess proc;
     proc.start(QStringLiteral("dolphin-ftp-share"),
-               {QStringLiteral("add"), shareName, m_path, anonymous, aclString});
+               {QStringLiteral("add"), shareName, m_path, aclString});
     proc.waitForFinished(5000);
 
     if (proc.exitCode() == 0) {
@@ -283,4 +335,40 @@ void FtpSharePlugin::applyChanges()
     }
 }
 
+void FtpSharePlugin::onChangePassword()
+{
+    const QString username = m_pwUserCombo->currentText();
+    if (username.isEmpty())
+        return;
+
+    if (!ftpUserExists(username)) {
+        QMessageBox::information(m_page,
+            i18n("FTP Password"),
+            i18n("User '%1' has no FTP account yet.\nSet permissions for this user first.", username));
+        return;
+    }
+
+    bool ok = false;
+    const QString password = QInputDialog::getText(
+        m_page,
+        i18n("FTP Password"),
+        i18n("New FTP password for '%1':", username),
+        QLineEdit::Password,
+        QString(),
+        &ok);
+
+    if (!ok || password.isEmpty())
+        return;
+
+    if (createFtpUser(username, password)) {
+        QMessageBox::information(m_page,
+            i18n("FTP Password"),
+            i18n("Password for '%1' updated.", username));
+    } else {
+        QMessageBox::warning(m_page,
+            i18n("FTP Password"),
+            i18n("Failed to update password for '%1'.", username));
+    }
+}
+
 #include "ftpshareplugin.moc"

kf5/src/ftpshareplugin.h

@@ -5,6 +5,7 @@
 #include <QCheckBox>
 #include <QComboBox>
 #include <QLineEdit>
+#include <QPushButton>
 #include <QWidget>
 
 struct UserPermission {
@@ -22,6 +23,7 @@ public:
 private:
     void loadCurrentShare();
     void onShareToggled(bool checked);
+    void onChangePassword();
 
     QString m_path;
     QString m_defaultShareName;
@@ -29,8 +31,8 @@ private:
     QWidget *m_page = nullptr;
     QCheckBox *m_shareCheckBox = nullptr;
     QLineEdit *m_nameEdit = nullptr;
-    QCheckBox *m_anonymousCheckBox = nullptr;
     QWidget *m_usersWidget = nullptr;
+    QComboBox *m_pwUserCombo = nullptr;
 
     QVector<UserPermission> m_userPerms;
 

kf6/src/ftpshareplugin.cpp

@@ -5,7 +5,9 @@
 
 #include <QFormLayout>
 #include <QGroupBox>
+#include <QInputDialog>
 #include <QLabel>
+#include <QMessageBox>
 #include <QProcess>
 #include <QScrollArea>
 #include <QVBoxLayout>
@@ -37,6 +39,26 @@ static int indexForAcl(const QString &acl)
     return 0;
 }
 
+// Check if a virtual FTP user exists
+static bool ftpUserExists(const QString &username)
+{
+    QProcess proc;
+    proc.start(QStringLiteral("dolphin-ftp-share"),
+               {QStringLiteral("userexists"), username});
+    proc.waitForFinished(5000);
+    return proc.exitCode() == 0;
+}
+
+// Create a virtual FTP user with password
+static bool createFtpUser(const QString &username, const QString &password)
+{
+    QProcess proc;
+    proc.start(QStringLiteral("dolphin-ftp-share"),
+               {QStringLiteral("passwd"), username, password});
+    proc.waitForFinished(5000);
+    return proc.exitCode() == 0;
+}
+
 // Get list of local users (UID >= 1000, excluding nobody)
 static QStringList getLocalUsers()
 {
@@ -89,13 +111,8 @@ FtpSharePlugin::FtpSharePlugin(QObject *parent, const QVariantList &args)
     nameLayout->addRow(i18n("Name:"), m_nameEdit);
     mainLayout->addLayout(nameLayout);
 
-    // Anonymous access
-    m_anonymousCheckBox = new QCheckBox(i18n("Allow Anonymous Access"));
-    mainLayout->addWidget(m_anonymousCheckBox);
-
     // User permissions section
-    auto *usersGroup = new QGroupBox();
+    auto *usersGroup = new QGroupBox(i18n("User Permissions"));
-    usersGroup->setFlat(true);
     auto *usersLayout = new QVBoxLayout(usersGroup);
 
     // Scroll area for user list
@@ -123,6 +140,18 @@ FtpSharePlugin::FtpSharePlugin(QObject *parent, const QVariantList &args)
     usersLayout->addWidget(scrollArea);
     mainLayout->addWidget(usersGroup);
 
+    // Change password section
+    auto *pwGroup = new QGroupBox(i18n("FTP Password"));
+    auto *pwLayout = new QHBoxLayout(pwGroup);
+    m_pwUserCombo = new QComboBox();
+    m_pwUserCombo->addItems(users);
+    auto *pwButton = new QPushButton(i18n("Change Password..."));
+    pwLayout->addWidget(m_pwUserCombo);
+    pwLayout->addWidget(pwButton);
+    mainLayout->addWidget(pwGroup);
+
+    connect(pwButton, &QPushButton::clicked, this, &FtpSharePlugin::onChangePassword);
+
     mainLayout->addStretch();
 
     // Connect signals
@@ -130,8 +159,6 @@ FtpSharePlugin::FtpSharePlugin(QObject *parent, const QVariantList &args)
             this, &FtpSharePlugin::onShareToggled);
     connect(m_nameEdit, &QLineEdit::textChanged,
             this, [this]() { setDirty(true); });
-    connect(m_anonymousCheckBox, &QCheckBox::toggled,
-            this, [this]() { setDirty(true); });
 
     // Load existing share info
     loadCurrentShare();
@@ -146,7 +173,6 @@ FtpSharePlugin::FtpSharePlugin(QObject *parent, const QVariantList &args)
 void FtpSharePlugin::onShareToggled(bool checked)
 {
     m_nameEdit->setEnabled(checked);
-    m_anonymousCheckBox->setEnabled(checked);
     m_usersWidget->setEnabled(checked);
     setDirty(true);
 }
@@ -167,12 +193,10 @@ void FtpSharePlugin::loadCurrentShare()
     // Format:
     // [sharename]
     // path=/some/path
-    // anonymous=y
     // user_acl=user1:rw,user2:ro
     QString currentSection;
     QString sharePath;
     QString shareAcl;
-    QString anonymous;
 
     const QStringList lines = output.split(QLatin1Char('\n'));
     for (const QString &line : lines) {
@@ -185,13 +209,10 @@ void FtpSharePlugin::loadCurrentShare()
             currentSection = line.mid(1, line.indexOf(QLatin1Char(']')) - 1);
             sharePath.clear();
             shareAcl.clear();
-            anonymous.clear();
         } else if (line.startsWith(QLatin1String("path="))) {
             sharePath = line.mid(5);
         } else if (line.startsWith(QLatin1String("user_acl="))) {
             shareAcl = line.mid(9);
-        } else if (line.startsWith(QLatin1String("anonymous="))) {
-            anonymous = line.mid(10);
         }
     }
 
@@ -204,7 +225,6 @@ void FtpSharePlugin::loadCurrentShare()
     m_originalShareName = currentSection;
     m_shareCheckBox->setChecked(true);
     m_nameEdit->setText(currentSection);
-    m_anonymousCheckBox->setChecked(anonymous == QLatin1String("y"));
 
     // Parse ACL: "user1:rw,user2:ro"
     if (!shareAcl.isEmpty()) {
@@ -257,6 +277,41 @@ void FtpSharePlugin::applyChanges()
         proc.waitForFinished(5000);
     }
 
+    // Create FTP users for users that have permissions but no FTP account yet
+    for (const auto &up : m_userPerms) {
+        if (up.combo->currentIndex() == 0)
+            continue; // No permission set, skip
+
+        if (ftpUserExists(up.username))
+            continue; // Already has FTP account
+
+        // Ask for FTP password
+        bool ok = false;
+        const QString password = QInputDialog::getText(
+            m_page,
+            i18n("FTP Password"),
+            i18n("Set FTP password for user '%1':", up.username),
+            QLineEdit::Password,
+            QString(),
+            &ok);
+
+        if (!ok || password.isEmpty()) {
+            QMessageBox::warning(m_page,
+                i18n("FTP Share"),
+                i18n("No password set for '%1'. This user will be skipped.", up.username));
+            up.combo->setCurrentIndex(0);
+            continue;
+        }
+
+        if (!createFtpUser(up.username, password)) {
+            QMessageBox::warning(m_page,
+                i18n("FTP Share"),
+                i18n("Failed to create FTP user '%1'.", up.username));
+            up.combo->setCurrentIndex(0);
+            continue;
+        }
+    }
+
     // Build ACL string
     QStringList aclParts;
     for (const auto &up : m_userPerms) {
@@ -267,14 +322,11 @@ void FtpSharePlugin::applyChanges()
     }
 
     const QString aclString = aclParts.join(QLatin1Char(','));
-    const QString anonymous = m_anonymousCheckBox->isChecked()
-                                  ? QStringLiteral("y")
-                                  : QStringLiteral("n");
 
-    // dolphin-ftp-share add <name> <path> <anonymous> <acl>
+    // dolphin-ftp-share add <name> <path> <acl>
     QProcess proc;
     proc.start(QStringLiteral("dolphin-ftp-share"),
-               {QStringLiteral("add"), shareName, m_path, anonymous, aclString});
+               {QStringLiteral("add"), shareName, m_path, aclString});
     proc.waitForFinished(5000);
 
     if (proc.exitCode() == 0) {
@@ -283,4 +335,40 @@ void FtpSharePlugin::applyChanges()
     }
 }
 
+void FtpSharePlugin::onChangePassword()
+{
+    const QString username = m_pwUserCombo->currentText();
+    if (username.isEmpty())
+        return;
+
+    if (!ftpUserExists(username)) {
+        QMessageBox::information(m_page,
+            i18n("FTP Password"),
+            i18n("User '%1' has no FTP account yet.\nSet permissions for this user first.", username));
+        return;
+    }
+
+    bool ok = false;
+    const QString password = QInputDialog::getText(
+        m_page,
+        i18n("FTP Password"),
+        i18n("New FTP password for '%1':", username),
+        QLineEdit::Password,
+        QString(),
+        &ok);
+
+    if (!ok || password.isEmpty())
+        return;
+
+    if (createFtpUser(username, password)) {
+        QMessageBox::information(m_page,
+            i18n("FTP Password"),
+            i18n("Password for '%1' updated.", username));
+    } else {
+        QMessageBox::warning(m_page,
+            i18n("FTP Password"),
+            i18n("Failed to update password for '%1'.", username));
+    }
+}
+
 #include "ftpshareplugin.moc"

kf6/src/ftpshareplugin.h

@@ -5,6 +5,7 @@
 #include <QCheckBox>
 #include <QComboBox>
 #include <QLineEdit>
+#include <QPushButton>
 #include <QWidget>
 
 struct UserPermission {
@@ -22,6 +23,7 @@ public:
 private:
     void loadCurrentShare();
     void onShareToggled(bool checked);
+    void onChangePassword();
 
     QString m_path;
     QString m_defaultShareName;
@@ -29,8 +31,8 @@ private:
     QWidget *m_page = nullptr;
     QCheckBox *m_shareCheckBox = nullptr;
     QLineEdit *m_nameEdit = nullptr;
-    QCheckBox *m_anonymousCheckBox = nullptr;
     QWidget *m_usersWidget = nullptr;
+    QComboBox *m_pwUserCombo = nullptr;
 
     QVector<UserPermission> m_userPerms;
 

scripts/dolphin-ftp-share

@@ -1,21 +1,108 @@
 #!/bin/bash
-# dolphin-ftp-share - Manage FTP folder shares for Dolphin
+# dolphin-ftp-share - Manage FTP folder shares for Dolphin with Pure-FTPd
+#
+# Each user gets a personal FTP root with only their shared folders.
+# Virtual FTP users (PureDB) are created automatically.
+# Permissions (ro/rw) are enforced via bind mount options.
 #
 # Usage:
+#   dolphin-ftp-share setup                             Initial Pure-FTPd setup
 #   dolphin-ftp-share info                              List all shares
-#   dolphin-ftp-share add <name> <path> <anon> <acl>    Add/update a share
+#   dolphin-ftp-share add <name> <path> <acl>           Add/update a share
 #   dolphin-ftp-share delete <name>                     Remove a share
-#
+#   dolphin-ftp-share passwd <username> <password>      Set FTP password
-# Share configs are stored in ~/.local/share/dolphin-ftp-shares/
-# Shares are bind-mounted into ~/.local/share/dolphin-ftp-root/
-#
-# The FTP root directory can be served by any FTP server (e.g. vsftpd).
-# Each share appears as a real subdirectory under the FTP root via bind mount.
 
 set -e
 
 SHARE_DIR="${HOME}/.local/share/dolphin-ftp-shares"
 FTP_ROOT="${HOME}/.local/share/dolphin-ftp-root"
+PASSWD_FILE="/etc/pure-ftpd/pureftpd.passwd"
+PDB_FILE="/etc/pure-ftpd/pureftpd.pdb"
+
+CALLER_UID=$(id -u)
+CALLER_GID=$(id -g)
+
+# Update home directory for an existing virtual FTP user.
+ensure_virtual_user() {
+    local username="$1"
+    local user_root="$FTP_ROOT/users/$username"
+
+    mkdir -p "$user_root"
+
+    if sudo pure-pw show "$username" -f "$PASSWD_FILE" >/dev/null 2>&1; then
+        sudo pure-pw usermod "$username" \
+            -d "$user_root" \
+            -f "$PASSWD_FILE" 2>/dev/null
+    fi
+}
+
+rebuild_db() {
+    sudo pure-pw mkdb "$PDB_FILE" -f "$PASSWD_FILE"
+}
+
+# Unmount a share from all user roots
+unmount_share() {
+    local name="$1"
+    if [ -d "$FTP_ROOT/users" ]; then
+        for user_dir in "$FTP_ROOT/users"/*/; do
+            [ -d "$user_dir" ] || continue
+            local mp="${user_dir}${name}"
+            if mountpoint -q "$mp" 2>/dev/null; then
+                sudo umount "$mp"
+            fi
+            rmdir "$mp" 2>/dev/null || true
+        done
+    fi
+}
+
+cmd_setup() {
+    echo "Setting up Pure-FTPd for Dolphin FTP sharing..."
+
+    mkdir -p "$FTP_ROOT/users"
+
+    # Enable PureDB authentication
+    echo "$PDB_FILE" | sudo tee /etc/pure-ftpd/conf/PureDB >/dev/null
+    sudo ln -sf /etc/pure-ftpd/conf/PureDB /etc/pure-ftpd/auth/50pure
+
+    # Chroot all users to their FTP home
+    echo "yes" | sudo tee /etc/pure-ftpd/conf/ChrootEveryone >/dev/null
+
+    # Disable anonymous access — only authenticated virtual users
+    echo "yes" | sudo tee /etc/pure-ftpd/conf/NoAnonymous >/dev/null
+
+    # Remove system auth so only PureDB users can log in
+    sudo rm -f /etc/pure-ftpd/auth/65unix /etc/pure-ftpd/auth/70pam
+
+    # Create empty password DB if needed
+    sudo touch "$PASSWD_FILE"
+    sudo pure-pw mkdb "$PDB_FILE" -f "$PASSWD_FILE"
+
+    # Enable logging
+    echo "yes" | sudo tee /etc/pure-ftpd/conf/VerboseLog >/dev/null
+
+    # Create sudoers rule for passwordless mount/umount/pure-pw
+    # Use SUDO_USER to get the real user (not root) when run with sudo
+    local REAL_USER="${SUDO_USER:-$USER}"
+    local REAL_HOME
+    REAL_HOME=$(getent passwd "$REAL_USER" | cut -d: -f6)
+    local REAL_FTP_ROOT="${REAL_HOME}/.local/share/dolphin-ftp-root"
+
+    sudo tee /etc/sudoers.d/dolphin-ftp-share >/dev/null <<EOF
+${REAL_USER} ALL=(root) NOPASSWD: /usr/bin/mount --bind *
+${REAL_USER} ALL=(root) NOPASSWD: /usr/bin/mount -o remount?ro?bind *
+${REAL_USER} ALL=(root) NOPASSWD: /usr/bin/umount ${REAL_FTP_ROOT}/*
+${REAL_USER} ALL=(root) NOPASSWD: /usr/bin/pure-pw *
+EOF
+    sudo chmod 440 /etc/sudoers.d/dolphin-ftp-share
+
+    sudo systemctl restart pure-ftpd
+
+    echo ""
+    echo "Setup complete!"
+    echo "Share folders via Dolphin: right-click folder → Properties → FTP tab"
+    echo "Default FTP password = username. Change with:"
+    echo "  dolphin-ftp-share passwd <user> <newpassword>"
+}
 
 cmd_info() {
     [ -d "$SHARE_DIR" ] || exit 0
@@ -31,33 +118,49 @@ cmd_info() {
 cmd_add() {
     local name="$1"
     local path="$2"
-    local anon="$3"
+    local acl="$3"
-    local acl="$4"
 
     if [ -z "$name" ] || [ -z "$path" ]; then
         echo "Error: name and path are required" >&2
         exit 1
     fi
 
-    mkdir -p "$SHARE_DIR" "$FTP_ROOT"
+    mkdir -p "$SHARE_DIR" "$FTP_ROOT/users"
 
-    # Write share config
+    # Unmount any existing mounts for this share (handles permission changes)
+    unmount_share "$name"
+
+    # Save config
     cat > "$SHARE_DIR/$name.conf" <<EOF
 path=$path
-anonymous=$anon
 user_acl=$acl
 EOF
 
-    # Create mount point directory
+    # Process per-user ACL: "user1:ro,user2:rw"
-    mkdir -p "$FTP_ROOT/$name"
+    if [ -n "$acl" ]; then
+        IFS=',' read -ra entries <<< "$acl"
+        for entry in "${entries[@]}"; do
+            local username="${entry%%:*}"
+            local perm="${entry##*:}"
+            local user_root="$FTP_ROOT/users/$username"
+            local mount_point="$user_root/$name"
 
-    # Unmount if already mounted
+            ensure_virtual_user "$username"
-    mountpoint -q "$FTP_ROOT/$name" 2>/dev/null && sudo umount "$FTP_ROOT/$name" 2>/dev/null || true
 
-    # Bind-mount the shared folder into the FTP root
+            mkdir -p "$mount_point"
-    sudo mount --bind "$path" "$FTP_ROOT/$name"
 
-    echo "Share '$name' added: $path -> $FTP_ROOT/$name"
+            # Bind mount the shared folder into user's personal FTP root
+            sudo mount --bind "$path" "$mount_point"
+
+            # Read-only: remount with ro flag
+            if [ "$perm" = "ro" ]; then
+                sudo mount -o remount,ro,bind "$mount_point"
+            fi
+        done
+    fi
+
+    rebuild_db
+    echo "Share '$name' added: $path"
 }
 
 cmd_delete() {
@@ -68,32 +171,77 @@ cmd_delete() {
         exit 1
     fi
 
-    # Unmount bind mount
+    unmount_share "$name"
-    if mountpoint -q "$FTP_ROOT/$name" 2>/dev/null; then
-        sudo umount "$FTP_ROOT/$name"
-    fi
-
     rm -f "$SHARE_DIR/$name.conf"
-    rmdir "$FTP_ROOT/$name" 2>/dev/null || true
 
-    # Clean up empty directories
+    # Clean up
     rmdir "$SHARE_DIR" 2>/dev/null || true
-    rmdir "$FTP_ROOT" 2>/dev/null || true
 
     echo "Share '$name' deleted"
 }
 
+cmd_userexists() {
+    local username="$1"
+
+    if [ -z "$username" ]; then
+        exit 1
+    fi
+
+    if sudo pure-pw show "$username" -f "$PASSWD_FILE" >/dev/null 2>&1; then
+        exit 0
+    else
+        exit 1
+    fi
+}
+
+cmd_passwd() {
+    local username="$1"
+    local password="$2"
+
+    if [ -z "$username" ] || [ -z "$password" ]; then
+        echo "Error: username and password are required" >&2
+        exit 1
+    fi
+
+    local user_root="$FTP_ROOT/users/$username"
+    mkdir -p "$user_root"
+
+    # Generate MD5 password hash
+    local hash
+    hash=$(openssl passwd -1 "$password")
+
+    if sudo pure-pw show "$username" -f "$PASSWD_FILE" >/dev/null 2>&1; then
+        # User exists — update password in-place
+        sudo sed -i "s|^${username}:[^:]*:|${username}:${hash}:|" "$PASSWD_FILE"
+        echo "Password updated for '$username'"
+    else
+        # User doesn't exist — add entry to passwd file
+        # Format: username:hash:uid:gid:gecos:home:uploadbw:downloadbw:uploadratio:downloadratio:maxconn:filesquota:sizequota:allowedlocalip:allowedclientip:timerestrictions
+        echo "${username}:${hash}:${CALLER_UID}:${CALLER_GID}::${user_root}::::::::::::" | \
+            sudo tee -a "$PASSWD_FILE" >/dev/null
+        echo "Created FTP user '$username'"
+    fi
+
+    rebuild_db
+}
+
 case "${1:-}" in
-    info)   cmd_info ;;
+    setup)      cmd_setup ;;
-    add)    cmd_add "$2" "$3" "${4:-n}" "${5:-}" ;;
+    info)       cmd_info ;;
-    delete) cmd_delete "$2" ;;
+    add)        cmd_add "$2" "$3" "${4:-}" ;;
+    delete)     cmd_delete "$2" ;;
+    userexists) cmd_userexists "$2" ;;
+    passwd)     cmd_passwd "$2" "$3" ;;
     *)
-        echo "Usage: dolphin-ftp-share {info|add|delete}" >&2
+        echo "Usage: dolphin-ftp-share {setup|info|add|delete|userexists|passwd}" >&2
         echo "" >&2
         echo "Commands:" >&2
+        echo "  setup                             Initial Pure-FTPd setup" >&2
         echo "  info                              List all shares" >&2
-        echo "  add <name> <path> <anon> <acl>    Add/update a share" >&2
+        echo "  add <name> <path> <acl>           Add/update a share" >&2
         echo "  delete <name>                     Remove a share" >&2
+        echo "  userexists <username>              Check if FTP user exists" >&2
+        echo "  passwd <username> <password>       Set/create FTP password" >&2
         exit 1
         ;;
 esac