Adding upstream version 7.94+git20230807.3be01efb1+dfsg.upstream/7.94+git20230807.3be01efb1+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 706 insertions, 0 deletions

diff --git a/zenmap/zenmapGUI/ScriptInterface.py b/zenmap/zenmapGUI/ScriptInterface.py
new file mode 100644
index 0000000..b22651a
--- /dev/null
+++ b/zenmap/zenmapGUI/ScriptInterface.py
@@ -0,0 +1,706 @@
+#!/usr/bin/env python3
+
+# ***********************IMPORTANT NMAP LICENSE TERMS************************
+# *
+# * The Nmap Security Scanner is (C) 1996-2023 Nmap Software LLC ("The Nmap
+# * Project"). Nmap is also a registered trademark of the Nmap Project.
+# *
+# * This program is distributed under the terms of the Nmap Public Source
+# * License (NPSL). The exact license text applying to a particular Nmap
+# * release or source code control revision is contained in the LICENSE
+# * file distributed with that version of Nmap or source code control
+# * revision. More Nmap copyright/legal information is available from
+# * https://nmap.org/book/man-legal.html, and further information on the
+# * NPSL license itself can be found at https://nmap.org/npsl/ . This
+# * header summarizes some key points from the Nmap license, but is no
+# * substitute for the actual license text.
+# *
+# * Nmap is generally free for end users to download and use themselves,
+# * including commercial use. It is available from https://nmap.org.
+# *
+# * The Nmap license generally prohibits companies from using and
+# * redistributing Nmap in commercial products, but we sell a special Nmap
+# * OEM Edition with a more permissive license and special features for
+# * this purpose. See https://nmap.org/oem/
+# *
+# * If you have received a written Nmap license agreement or contract
+# * stating terms other than these (such as an Nmap OEM license), you may
+# * choose to use and redistribute Nmap under those terms instead.
+# *
+# * The official Nmap Windows builds include the Npcap software
+# * (https://npcap.com) for packet capture and transmission. It is under
+# * separate license terms which forbid redistribution without special
+# * permission. So the official Nmap Windows builds may not be redistributed
+# * without special permission (such as an Nmap OEM license).
+# *
+# * Source is provided to this software because we believe users have a
+# * right to know exactly what a program is going to do before they run it.
+# * This also allows you to audit the software for security holes.
+# *
+# * Source code also allows you to port Nmap to new platforms, fix bugs, and add
+# * new features. You are highly encouraged to submit your changes as a Github PR
+# * or by email to the dev@nmap.org mailing list for possible incorporation into
+# * the main distribution. Unless you specify otherwise, it is understood that
+# * you are offering us very broad rights to use your submissions as described in
+# * the Nmap Public Source License Contributor Agreement. This is important
+# * because we fund the project by selling licenses with various terms, and also
+# * because the inability to relicense code has caused devastating problems for
+# * other Free Software projects (such as KDE and NASM).
+# *
+# * The free version of Nmap is distributed in the hope that it will be
+# * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
+# * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. Warranties,
+# * indemnification and commercial support are all available through the
+# * Npcap OEM program--see https://nmap.org/oem/
+# *
+# ***************************************************************************/
+
+# This module is responsible for interface present under "Scripting" tab.
+
+import gi
+
+gi.require_version("Gtk", "3.0")
+from gi.repository import Gtk, GLib
+
+import os
+import tempfile
+
+# Prevent loading PyXML
+import xml
+xml.__path__ = [x for x in xml.__path__ if "_xmlplus" not in x]
+
+import xml.sax
+
+from zenmapGUI.higwidgets.higboxes import HIGVBox, HIGHBox
+from zenmapGUI.higwidgets.higscrollers import HIGScrolledWindow
+from zenmapGUI.higwidgets.higbuttons import HIGButton
+from zenmapCore.ScriptMetadata import get_script_entries
+from zenmapCore.ScriptArgsParser import parse_script_args_dict
+from zenmapCore.NmapCommand import NmapCommand
+from zenmapCore.NmapOptions import NmapOptions
+import zenmapCore.NSEDocParser
+import zenmapGUI.FileChoosers
+from zenmapCore.UmitConf import PathsConfig
+from zenmapCore.UmitLogging import log
+from zenmapCore.Name import APP_NAME
+
+paths_config = PathsConfig()
+
+
+def text_buffer_insert_nsedoc(buf, nsedoc):
+    """Inserts NSEDoc at the end of the buffer, with markup turned into proper
+    tags."""
+    if not buf.get_tag_table().lookup("NSEDOC_CODE_TAG"):
+        buf.create_tag("NSEDOC_CODE_TAG", font="Monospace")
+    for event in zenmapCore.NSEDocParser.nsedoc_parse(nsedoc):
+        if event.type == "paragraph_start":
+            buf.insert(buf.get_end_iter(), "\n")
+        elif event.type == "paragraph_end":
+            buf.insert(buf.get_end_iter(), "\n")
+        elif event.type == "list_start":
+            buf.insert(buf.get_end_iter(), "\n")
+        elif event.type == "list_end":
+            pass
+        elif event.type == "list_item_start":
+            buf.insert(buf.get_end_iter(), "\u2022\u00a0")  # bullet nbsp
+        elif event.type == "list_item_end":
+            buf.insert(buf.get_end_iter(), "\n")
+        elif event.type == "text":
+            buf.insert(buf.get_end_iter(), event.text)
+        elif event.type == "code":
+            buf.insert_with_tags_by_name(
+                    buf.get_end_iter(), event.text, "NSEDOC_CODE_TAG")
+
+
+class ScriptHelpXMLContentHandler (xml.sax.handler.ContentHandler):
+    """A very simple parser for --script-help XML output. This could extract
+    other information like categories and description, but all it gets is
+    filenames. (ScriptMetadata gets the other information.)"""
+    def __init__(self):
+        xml.sax.handler.ContentHandler.__init__(self)
+        self.script_filenames = []
+        self.scripts_dir = None
+        self.nselib_dir = None
+
+    def startElement(self, name, attrs):
+        if name == "directory":
+            if "name" not in attrs:
+                raise ValueError(
+                        '"directory" element did not have "name" attribute')
+            dirname = attrs["name"]
+            if "path" not in attrs:
+                raise ValueError(
+                        '"directory" element did not have "path" attribute')
+            path = attrs["path"]
+            if dirname == "scripts":
+                self.scripts_dir = path
+            elif dirname == "nselib":
+                self.nselib_dir = path
+            else:
+                # Ignore.
+                pass
+        elif name == "script":
+            if "filename" not in attrs:
+                raise ValueError(
+                        '"script" element did not have "filename" attribute')
+            self.script_filenames.append(attrs["filename"])
+
+    @staticmethod
+    def parse_nmap_script_help(f):
+        parser = xml.sax.make_parser()
+        handler = ScriptHelpXMLContentHandler()
+        parser.setContentHandler(handler)
+        parser.parse(f)
+        return handler
+
+
+class ScriptInterface:
+    # Timeout, in milliseconds, after the user stops typing and we update the
+    # interface from --script.
+    SCRIPT_LIST_DELAY = 500
+    # Timeout, in milliseconds, between polls of the Nmap subprocess.
+    NMAP_DELAY = 200
+
+    def __init__(self, root_tabs, ops, update_command, help_buf):
+        self.hmainbox = HIGHBox(False, 0)
+        self.notscripttab = False  # show profile editor it is a script tab
+        self.nmap_process = None
+        self.script_list_timeout_id = None
+        self.nmap_timeout_id = None
+        self.chk_nmap_timeout_id = None
+        self.script_file_chooser = None
+        self.ops = ops
+        self.update_command = update_command
+        self.help_buf = help_buf
+        self.arg_values = {}
+        self.current_arguments = []
+        self.set_help_texts()
+        self.prev_script_spec = None
+        self.focusedentry = None
+
+        self.liststore = Gtk.ListStore.new([str, bool, object])
+
+        self.file_liststore = Gtk.ListStore.new([str, bool])
+
+        # Arg name, arg value, (name, desc) tuple.
+        self.arg_liststore = Gtk.ListStore.new([str, str, object])
+
+        # This is what is shown initially. After the initial Nmap run to get
+        # the list of script is finished, this will be replaced with a TreeView
+        # showing the scripts or an error message.
+        self.script_list_container = Gtk.Box.new(Gtk.Orientation.VERTICAL, 0)
+        self.script_list_container.pack_start(self.make_please_wait_widget(), True, True, 0)
+        self.hmainbox.pack_start(self.script_list_container, False, False, 0)
+
+        self.nmap_error_widget = Gtk.Label.new(_(
+            "There was an error getting the list of scripts from Nmap. "
+            "Try upgrading Nmap."))
+        self.nmap_error_widget.set_line_wrap(True)
+        self.nmap_error_widget.show_all()
+
+        self.script_list_widget = self.make_script_list_widget()
+        self.script_list_widget.show_all()
+
+        vbox = HIGVBox(False, 5)
+        vbox.pack_start(self.make_description_widget(), True, True, 0)
+        vbox.pack_start(self.make_arguments_widget(), True, True, 0)
+        self.hmainbox.pack_end(vbox, True, True, 0)
+
+        self.update_argument_values(self.ops["--script-args"])
+
+        # Start the initial backgrounded Nmap run to get the list of all
+        # available scripts.
+        self.get_script_list("all", self.initial_script_list_cb)
+
+    def get_script_list(self, rules, callback):
+        """Start an Nmap subprocess in the background with
+        "--script-help=<rules> -oX -", and set it up to call the given callback
+        when finished."""
+
+        ops = NmapOptions()
+        ops.executable = paths_config.nmap_command_path
+        ops["--script-help"] = rules
+        ops["-oX"] = "-"
+        command_string = ops.render_string()
+        # Separate stderr to avoid breaking XML parsing with "Warning: File
+        # ./nse_main.lua exists, but Nmap is using...".
+        stderr = tempfile.TemporaryFile(
+                mode="r", prefix=APP_NAME + "-script-help-stderr-")
+        log.debug("Script interface: running %s" % repr(command_string))
+        nmap_process = NmapCommand(command_string)
+        try:
+            nmap_process.run_scan(stderr=stderr)
+        except Exception as e:
+            callback(False, None)
+            stderr.close()
+            return
+        stderr.close()
+
+        self.script_list_widget.set_sensitive(False)
+
+        GLib.timeout_add(
+                self.NMAP_DELAY, self.script_list_timer_callback,
+                nmap_process, callback)
+
+    def script_list_timer_callback(self, process, callback):
+        try:
+            status = process.scan_state()
+        except Exception:
+            status = None
+        log.debug("Script interface: script_list_timer_callback %s" %
+                repr(status))
+
+        if status is True:
+            # Still running, schedule this timer to check again.
+            return True
+
+        self.script_list_widget.set_sensitive(True)
+
+        if status is False:
+            # Finished with success.
+            callback(True, process)
+        else:
+            # Finished with error.
+            callback(False, process)
+
+    def initial_script_list_cb(self, status, process):
+        log.debug("Script interface: initial_script_list_cb %s" % repr(status))
+        for child in self.script_list_container.get_children():
+            self.script_list_container.remove(child)
+        if status and self.handle_initial_script_list_output(process):
+            self.script_list_container.pack_start(self.script_list_widget, True, True, 0)
+        else:
+            self.script_list_container.pack_start(self.nmap_error_widget, True, True, 0)
+
+    def handle_initial_script_list_output(self, process):
+        process.stdout_file.seek(0)
+        try:
+            handler = ScriptHelpXMLContentHandler.parse_nmap_script_help(
+                    process.stdout_file)
+        except (ValueError, xml.sax.SAXParseException) as e:
+            log.debug("--script-help parse exception: %s" % str(e))
+            return False
+
+        # Check if any scripts were output; if not, Nmap is probably too old.
+        if len(handler.script_filenames) == 0:
+            return False
+
+        if not handler.scripts_dir:
+            log.debug("--script-help error: no scripts directory")
+            return False
+        if not handler.nselib_dir:
+            log.debug("--script-help error: no nselib directory")
+            return False
+
+        log.debug("Script interface: scripts dir %s" % repr(
+            handler.scripts_dir))
+        log.debug("Script interface: nselib dir %s" % repr(handler.nselib_dir))
+
+        # Make a dict of script metadata entries.
+        entries = {}
+        for entry in get_script_entries(
+                handler.scripts_dir, handler.nselib_dir):
+            entries[entry.filename] = entry
+
+        self.liststore.clear()
+        for filename in handler.script_filenames:
+            basename = os.path.basename(filename)
+            entry = entries.get(basename)
+            if entry:
+                script_id = self.strip_file_name(basename)
+                self.liststore.append([script_id, False, entry])
+            else:
+                # ScriptMetadata found nothing for this script?
+                self.file_liststore.append([filename, False])
+
+        # Now figure out which scripts are selected.
+        self.update_script_list_from_spec(self.ops["--script"])
+        return True
+
+    def update_script_list_from_spec(self, spec):
+        """Callback method for user edit delay."""
+        log.debug("Script interface: update_script_list_from_spec %s" % repr(
+            spec))
+        if spec:
+            self.get_script_list(spec, self.update_script_list_cb)
+        else:
+            self.refresh_list_scripts([])
+
+    def update_script_list_cb(self, status, process):
+        log.debug("Script interface: update_script_list_cb %s" % repr(status))
+        if status:
+            self.handle_update_script_list_output(process)
+        else:
+            self.refresh_list_scripts([])
+
+    def handle_update_script_list_output(self, process):
+        process.stdout_file.seek(0)
+        try:
+            handler = ScriptHelpXMLContentHandler.parse_nmap_script_help(
+                    process.stdout_file)
+        except (ValueError, xml.sax.SAXParseException) as e:
+            log.debug("--script-help parse exception: %s" % str(e))
+            return False
+
+        self.refresh_list_scripts(handler.script_filenames)
+
+    def get_hmain_box(self):
+        """Returns main Hbox to ProfileEditor."""
+        return self.hmainbox
+
+    def update(self):
+        """Updates the interface when the command entry is changed."""
+        # updates list of scripts
+        rules = self.ops["--script"]
+        if (self.prev_script_spec != rules):
+            self.renew_script_list_timer(rules)
+        self.prev_script_spec = rules
+        # updates arguments..
+        raw_argument = self.ops["--script-args"]
+        if raw_argument is not None:
+            self.parse_script_args(raw_argument)
+        self.arg_liststore.clear()
+        for arg in self.current_arguments:
+            arg_name, arg_desc = arg
+            value = self.arg_values.get(arg_name)
+            if not value:
+                self.arg_liststore.append([arg_name, None, arg])
+            else:
+                self.arg_liststore.append([arg_name, value, arg])
+
+    def renew_script_list_timer(self, spec):
+        """Restart the timer to update the script list when the user edits the
+        command. Because updating the script list is an expensive operation
+        involving the creation of a subprocess, we don't do it for every typed
+        character."""
+        if self.script_list_timeout_id:
+            GLib.source_remove(self.script_list_timeout_id)
+        self.script_list_timeout_id = GLib.timeout_add(
+                self.SCRIPT_LIST_DELAY,
+                self.update_script_list_from_spec, spec)
+
+    def parse_script_args(self, raw_argument):
+        """When the command line is edited, this function is called to update
+        the script arguments display according to the value of
+        --script-args."""
+        arg_dict = parse_script_args_dict(raw_argument)
+        if arg_dict is None:  # if there is parsing error args_dict holds none
+            self.arg_values.clear()
+        else:
+            for key in arg_dict.keys():
+                self.arg_values[key] = arg_dict[key]
+
+    def update_argument_values(self, raw_argument):
+        """When scripting tab starts up, argument values are updated."""
+        if raw_argument is not None:
+            self.parse_script_args(raw_argument)
+
+    def set_help_texts(self):
+        """Sets the help texts to be displayed."""
+        self.list_scripts_help = _("""List of scripts
+
+A list of all installed scripts. Activate or deactivate a script \
+by clicking the box next to the script name.""")
+        self.description_help = _("""Description
+
+This box shows the categories a script belongs to. In addition, it gives a \
+detailed description of the script which is present in script. A URL points \
+to online NSEDoc documentation.""")
+        self.argument_help = _("""Arguments
+
+A list of arguments that affect the selected script. Enter a value by \
+clicking in the value field beside the argument name.""")
+
+    def make_please_wait_widget(self):
+        vbox = Gtk.Box.new(Gtk.Orientation.VERTICAL, 0)
+        label = Gtk.Label.new(_("Please wait."))
+        label.set_line_wrap(True)
+        vbox.pack_start(label, True, True, 0)
+        return vbox
+
+    def make_script_list_widget(self):
+        """Creates and packs widgets associated with left hand side of
+        Interface."""
+        vbox = Gtk.Box.new(Gtk.Orientation.VERTICAL, 0)
+
+        scrolled_window = HIGScrolledWindow()
+        scrolled_window.set_policy(Gtk.PolicyType.ALWAYS, Gtk.PolicyType.ALWAYS)
+        # Expand only vertically.
+        scrolled_window.set_size_request(175, -1)
+        listview = Gtk.TreeView.new_with_model(self.liststore)
+        listview.set_headers_visible(False)
+        listview.connect("enter-notify-event", self.update_help_ls_cb)
+        selection = listview.get_selection()
+        selection.connect("changed", self.selection_changed_cb)
+        cell = Gtk.CellRendererText()
+        togglecell = Gtk.CellRendererToggle()
+        togglecell.set_property("activatable", True)
+        togglecell.connect("toggled", self.toggled_cb, self.liststore)
+        col = Gtk.TreeViewColumn(title=_('Names'))
+        col.set_sizing(Gtk.TreeViewColumnSizing.GROW_ONLY)
+        col.set_resizable(True)
+        togglecol = Gtk.TreeViewColumn(title=None, cell_renderer=togglecell)
+        togglecol.add_attribute(togglecell, "active", 1)
+        listview.append_column(togglecol)
+        listview.append_column(col)
+        col.pack_start(cell, True)
+        col.add_attribute(cell, "text", 0)
+        scrolled_window.add(listview)
+        scrolled_window.show()
+        vbox.pack_start(scrolled_window, True, True, 0)
+
+        self.file_scrolled_window = HIGScrolledWindow()
+        self.file_scrolled_window.set_policy(
+                Gtk.PolicyType.ALWAYS, Gtk.PolicyType.ALWAYS)
+        self.file_scrolled_window.set_size_request(175, -1)
+        self.file_scrolled_window.hide()
+        self.file_scrolled_window.set_no_show_all(True)
+
+        self.file_listview = Gtk.TreeView.new_with_model(self.file_liststore)
+        self.file_listview.set_headers_visible(False)
+        col = Gtk.TreeViewColumn(title=None)
+        self.file_listview.append_column(col)
+        cell = Gtk.CellRendererToggle()
+        col.pack_start(cell, True)
+        cell.set_property("activatable", True)
+        col.add_attribute(cell, "active", 1)
+        cell.connect("toggled", self.toggled_cb, self.file_liststore)
+
+        col = Gtk.TreeViewColumn(title=None)
+        self.file_listview.append_column(col)
+        cell = Gtk.CellRendererText()
+        col.pack_start(cell, True)
+        col.add_attribute(cell, "text", 0)
+
+        self.file_listview.show_all()
+        self.file_scrolled_window.add(self.file_listview)
+        vbox.pack_start(self.file_scrolled_window, False, True, 0)
+
+        hbox = HIGHBox(False, 2)
+        self.remove_file_button = HIGButton(stock=Gtk.STOCK_REMOVE)
+        self.remove_file_button.connect(
+                "clicked", self.remove_file_button_clicked_cb)
+        self.remove_file_button.set_sensitive(False)
+        hbox.pack_end(self.remove_file_button, True, True, 0)
+        add_file_button = HIGButton(stock=Gtk.STOCK_ADD)
+        add_file_button.connect("clicked", self.add_file_button_clicked_cb)
+        hbox.pack_end(add_file_button, True, True, 0)
+
+        vbox.pack_start(hbox, False, False, 0)
+
+        return vbox
+
+    def refresh_list_scripts(self, selected_scripts):
+        """The list of selected scripts is refreshed in the list store."""
+        for row in self.liststore:
+            row[1] = False
+        for row in self.file_liststore:
+            row[1] = False
+        for filename in selected_scripts:
+            for row in self.liststore:
+                if row[0] == self.strip_file_name(os.path.basename(filename)):
+                    row[1] = True
+                    break
+            else:
+                for row in self.file_liststore:
+                    if row[0] == filename:
+                        row[1] = True
+                        break
+                else:
+                    self.file_liststore.append([filename, True])
+
+    def strip_file_name(self, filename):
+        """Removes a ".nse" extension from filename if present."""
+        if(filename.endswith(".nse")):
+            return filename[:-4]
+        else:
+            return filename
+
+    def set_script_from_selection(self):
+        scriptsname = []
+        for entry in self.liststore:
+            if entry[1]:
+                scriptsname.append(self.strip_file_name(entry[0]))
+        for entry in self.file_liststore:
+            if entry[1]:
+                scriptsname.append(entry[0])
+        if len(scriptsname) == 0:
+            self.ops["--script"] = None
+        else:
+            self.ops["--script"] = ",".join(scriptsname)
+        self.update_command()
+
+    def toggled_cb(self, cell, path, model):
+        """Callback method, called when the check box in list of scripts is
+        toggled."""
+        model[path][1] = not model[path][1]
+        self.set_script_from_selection()
+
+    def make_description_widget(self):
+        """Creates and packs widgets related to displaying the description
+        box."""
+        sw = HIGScrolledWindow()
+        sw.set_policy(Gtk.PolicyType.AUTOMATIC, Gtk.PolicyType.ALWAYS)
+        sw.set_shadow_type(Gtk.ShadowType.OUT)
+        sw.set_border_width(5)
+        text_view = Gtk.TextView()
+        text_view.connect("enter-notify-event", self.update_help_desc_cb)
+        self.text_buffer = text_view.get_buffer()
+        self.text_buffer.create_tag("Usage", font="Monospace")
+        self.text_buffer.create_tag("Output", font="Monospace")
+        text_view.set_wrap_mode(Gtk.WrapMode.WORD)
+        text_view.set_editable(False)
+        text_view.set_justification(Gtk.Justification.LEFT)
+        sw.add(text_view)
+        return sw
+
+    def make_arguments_widget(self):
+        """Creates and packs widgets related to arguments box."""
+        vbox = Gtk.Box.new(Gtk.Orientation.VERTICAL, 0)
+        vbox.pack_start(Gtk.Label.new(_("Arguments")), False, False, 0)
+        arg_window = HIGScrolledWindow()
+        arg_window.set_policy(Gtk.PolicyType.AUTOMATIC, Gtk.PolicyType.ALWAYS)
+        arg_window.set_shadow_type(Gtk.ShadowType.OUT)
+
+        arg_listview = Gtk.TreeView.new_with_model(self.arg_liststore)
+        arg_listview.connect("motion-notify-event", self.update_help_arg_cb)
+        argument = Gtk.CellRendererText()
+        self.value = Gtk.CellRendererText()
+        self.value.connect("edited", self.value_edited_cb, self.arg_liststore)
+        arg_col = Gtk.TreeViewColumn(title="Arguments\t")
+        val_col = Gtk.TreeViewColumn(title="values")
+        arg_listview.append_column(arg_col)
+        arg_listview.append_column(val_col)
+        arg_col.pack_start(argument, True)
+        arg_col.add_attribute(argument, "text", 0)
+        val_col.pack_start(self.value, True)
+        val_col.add_attribute(self.value, "text", 1)
+
+        arg_window.add(arg_listview)
+        vbox.pack_start(arg_window, True, True, 0)
+
+        return vbox
+
+    def value_edited_cb(self, cell, path, new_text, model):
+        """Called when the argument cell is edited."""
+        self.arg_list = []
+        model[path][1] = new_text
+        argument_name = model[path][0]
+        self.arg_values[argument_name] = new_text
+        self.update_arg_values()
+
+    def update_arg_values(self):
+        """When the widget is updated with argument value, correspondingly
+        update the command line."""
+        for key in self.arg_values.keys():
+            if len(self.arg_values[key]) == 0:
+                del self.arg_values[key]
+            else:
+                self.arg_list.append(key + "=" + self.arg_values[key])
+        if len(self.arg_list) == 0:
+            self.ops["--script-args"] = None
+            self.arg_values.clear()
+        else:
+            self.ops["--script-args"] = ",".join(self.arg_list)
+        self.update_command()
+
+    def selection_changed_cb(self, selection):
+        """Called back when the list of scripts is selected."""
+        model, selection = selection.get_selected_rows()
+        for path in selection:
+            entry = model.get_value(model.get_iter(path), 2)
+            self.set_description(entry)
+            self.populate_arg_list(entry)
+            # Remember the currently pointing script entry
+            self.focusedentry = entry
+
+    def update_help_ls_cb(self, widget, extra):  # list of scripts
+        """Callback method to display the help for the list of scripts."""
+        self.help_buf.set_text(self.list_scripts_help)
+
+    def update_help_desc_cb(self, widget, extra):
+        """Callback method for displaying description."""
+        self.help_buf.set_text(self.description_help)
+
+    def update_help_arg_cb(self, treeview, event):
+        """Callback method for displaying argument help."""
+        wx, wy = treeview.get_pointer()
+        x, y = treeview.convert_widget_to_bin_window_coords(wx, wy)
+        path = treeview.get_path_at_pos(x, y)
+        if not path or not self.focusedentry:
+            self.help_buf.set_text("")
+            return
+        path = path[0]
+        model, selected = treeview.get_selection().get_selected()
+        arg_name, arg_desc = model.get_value(model.get_iter(path), 2)
+        if arg_desc is not None:
+            self.help_buf.set_text("")
+            self.help_buf.insert(
+                    self.help_buf.get_end_iter(), text="%s\n" % arg_name)
+            text_buffer_insert_nsedoc(self.help_buf, arg_desc)
+        else:
+            self.help_buf.set_text("")
+
+    def add_file_button_clicked_cb(self, button):
+        if self.script_file_chooser is None:
+            self.script_file_chooser = \
+                    zenmapGUI.FileChoosers.ScriptFileChooserDialog(
+                            title=_("Select script files"))
+        response = self.script_file_chooser.run()
+        filenames = self.script_file_chooser.get_filenames()
+        self.script_file_chooser.hide()
+        if response != Gtk.ResponseType.OK:
+            return
+        for filename in filenames:
+            self.file_liststore.append([filename, True])
+        if len(self.file_liststore) > 0:
+            self.file_scrolled_window.show()
+            self.remove_file_button.set_sensitive(True)
+        self.set_script_from_selection()
+
+    def remove_file_button_clicked_cb(self, button):
+        selection = self.file_listview.get_selection()
+        model, selection = selection.get_selected_rows()
+        for path in selection:
+            self.file_liststore.remove(model.get_iter(path))
+        if len(self.file_liststore) == 0:
+            self.file_scrolled_window.hide()
+            self.remove_file_button.set_sensitive(False)
+        self.set_script_from_selection()
+
+    def set_description(self, entry):
+        """Sets the content that is to be displayed in the description box."""
+        self.text_buffer.set_text("")
+
+        self.text_buffer.insert(self.text_buffer.get_end_iter(), """\
+Categories: %(cats)s
+""" % {"cats": ", ".join(entry.categories)})
+        text_buffer_insert_nsedoc(self.text_buffer, entry.description)
+        if entry.usage:
+            self.text_buffer.insert(
+                    self.text_buffer.get_end_iter(), "\nUsage\n")
+            self.text_buffer.insert_with_tags_by_name(
+                    self.text_buffer.get_end_iter(), entry.usage, "Usage")
+        if entry.output:
+            self.text_buffer.insert(
+                    self.text_buffer.get_end_iter(), "\nOutput\n")
+            self.text_buffer.insert_with_tags_by_name(
+                    self.text_buffer.get_end_iter(), entry.output, "Output")
+        if entry.url:
+            self.text_buffer.insert(
+                    self.text_buffer.get_end_iter(), "\n" + entry.url)
+
+    def populate_arg_list(self, entry):
+        """Called when a particular script is hovered over to display its
+        arguments and values (if any)."""
+        self.arg_liststore.clear()
+        self.current_arguments = []
+        self.value.set_property('editable', True)
+        for arg in entry.arguments:
+            arg_name, arg_desc = arg
+            self.current_arguments.append(arg)
+            value = self.arg_values.get(arg_name)
+            if not value:
+                self.arg_liststore.append([arg_name, None, arg])
+            else:
+                self.arg_liststore.append([arg_name, value, arg])