#!/usr/bin/env python
# -*- coding: utf-8 -*-

# ***********************IMPORTANT NMAP LICENSE TERMS************************
# *                                                                         *
# * The Nmap Security Scanner is (C) 1996-2016 Insecure.Com LLC. Nmap is    *
# * also a registered trademark of Insecure.Com LLC.  This program is free  *
# * software; you may redistribute and/or modify it under the terms of the  *
# * GNU General Public License as published by the Free Software            *
# * Foundation; Version 2 ("GPL"), BUT ONLY WITH ALL OF THE CLARIFICATIONS  *
# * AND EXCEPTIONS DESCRIBED HEREIN.  This guarantees your right to use,    *
# * modify, and redistribute this software under certain conditions.  If    *
# * you wish to embed Nmap technology into proprietary software, we sell    *
# * alternative licenses (contact sales@nmap.com).  Dozens of software      *
# * vendors already license Nmap technology such as host discovery, port    *
# * scanning, OS detection, version detection, and the Nmap Scripting       *
# * Engine.                                                                 *
# *                                                                         *
# * Note that the GPL places important restrictions on "derivative works",  *
# * yet it does not provide a detailed definition of that term.  To avoid   *
# * misunderstandings, we interpret that term as broadly as copyright law   *
# * allows.  For example, we consider an application to constitute a        *
# * derivative work for the purpose of this license if it does any of the   *
# * following with any software or content covered by this license          *
# * ("Covered Software"):                                                   *
# *                                                                         *
# * o Integrates source code from Covered Software.                         *
# *                                                                         *
# * o Reads or includes copyrighted data files, such as Nmap's nmap-os-db   *
# * or nmap-service-probes.                                                 *
# *                                                                         *
# * o Is designed specifically to execute Covered Software and parse the    *
# * results (as opposed to typical shell or execution-menu apps, which will *
# * execute anything you tell them to).                                     *
# *                                                                         *
# * o Includes Covered Software in a proprietary executable installer.  The *
# * installers produced by InstallShield are an example of this.  Including *
# * Nmap with other software in compressed or archival form does not        *
# * trigger this provision, provided appropriate open source decompression  *
# * or de-archiving software is widely available for no charge.  For the    *
# * purposes of this license, an installer is considered to include Covered *
# * Software even if it actually retrieves a copy of Covered Software from  *
# * another source during runtime (such as by downloading it from the       *
# * Internet).                                                              *
# *                                                                         *
# * o Links (statically or dynamically) to a library which does any of the  *
# * above.                                                                  *
# *                                                                         *
# * o Executes a helper program, module, or script to do any of the above.  *
# *                                                                         *
# * This list is not exclusive, but is meant to clarify our interpretation  *
# * of derived works with some common examples.  Other people may interpret *
# * the plain GPL differently, so we consider this a special exception to   *
# * the GPL that we apply to Covered Software.  Works which meet any of     *
# * these conditions must conform to all of the terms of this license,      *
# * particularly including the GPL Section 3 requirements of providing      *
# * source code and allowing free redistribution of the work as a whole.    *
# *                                                                         *
# * As another special exception to the GPL terms, Insecure.Com LLC grants  *
# * permission to link the code of this program with any version of the     *
# * OpenSSL library which is distributed under a license identical to that  *
# * listed in the included docs/licenses/OpenSSL.txt file, and distribute   *
# * linked combinations including the two.                                  *
# *                                                                         *
# * Any redistribution of Covered Software, including any derived works,    *
# * must obey and carry forward all of the terms of this license, including *
# * obeying all GPL rules and restrictions.  For example, source code of    *
# * the whole work must be provided and free redistribution must be         *
# * allowed.  All GPL references to "this License", are to be treated as    *
# * including the terms and conditions of this license text as well.        *
# *                                                                         *
# * Because this license imposes special exceptions to the GPL, Covered     *
# * Work may not be combined (even as part of a larger work) with plain GPL *
# * software.  The terms, conditions, and exceptions of this license must   *
# * be included as well.  This license is incompatible with some other open *
# * source licenses as well.  In some cases we can relicense portions of    *
# * Nmap or grant special permissions to use it in other open source        *
# * software.  Please contact fyodor@nmap.org with any such requests.       *
# * Similarly, we don't incorporate incompatible open source software into  *
# * Covered Software without special permission from the copyright holders. *
# *                                                                         *
# * If you have any questions about the licensing restrictions on using     *
# * Nmap in other works, are happy to help.  As mentioned above, we also    *
# * offer alternative license to integrate Nmap into proprietary            *
# * applications and appliances.  These contracts have been sold to dozens  *
# * of software vendors, and generally include a perpetual license as well  *
# * as providing for priority support and updates.  They also fund the      *
# * continued development of Nmap.  Please email sales@nmap.com for further *
# * information.                                                            *
# *                                                                         *
# * If you have received a written license agreement or contract for        *
# * Covered Software stating terms other than these, you may choose to use  *
# * and redistribute Covered Software under those terms instead of these.   *
# *                                                                         *
# * 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 send your changes   *
# * to the dev@nmap.org mailing list for possible incorporation into the    *
# * main distribution.  By sending these changes to Fyodor or one of the    *
# * Insecure.Org development mailing lists, or checking them into the Nmap  *
# * source code repository, it is understood (unless you specify otherwise) *
# * that you are offering the Nmap Project (Insecure.Com LLC) the           *
# * unlimited, non-exclusive right to reuse, modify, and relicense the      *
# * code.  Nmap will always be available Open Source, but this is important *
# * because the inability to relicense code has caused devastating problems *
# * for other Free Software projects (such as KDE and NASM).  We also       *
# * occasionally relicense the code to third parties as discussed above.    *
# * If you wish to specify special license conditions of your               *
# * contributions, just say so when you send them.                          *
# *                                                                         *
# * This program 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.  See the Nmap      *
# * license file for more details (it's in a COPYING file included with     *
# * Nmap, and also available from https://svn.nmap.org/nmap/COPYING)        *
# *                                                                         *
# ***************************************************************************/

import gobject
import gtk


# Prevent loading PyXML
import xml
xml.__path__ = [x for x in xml.__path__ if "_xmlplus" not in x]

from xml.dom import minidom

from zenmapGUI.higwidgets.higboxes import HIGHBox
from zenmapGUI.higwidgets.higlabels import HIGEntryLabel
from zenmapGUI.higwidgets.higbuttons import HIGButton

from zenmapGUI.FileChoosers import AllFilesFileChooserDialog
from zenmapGUI.ProfileHelp import ProfileHelp

from zenmapCore.Paths import Path
from zenmapCore.NmapOptions import NmapOptions, split_quoted, join_quoted
import zenmapCore.I18N
from zenmapCore.UmitLogging import log
from zenmapGUI.ScriptInterface import *


def get_option_check_auxiliary_widget(option, ops, check):
    if option in ("-sI", "-b", "--script", "--script-args", "--exclude", "-p",
            "-D", "-S", "--source-port", "-e", "--ttl", "-iR", "--max-retries",
            "--host-timeout", "--max-rtt-timeout", "--min-rtt-timeout",
            "--initial-rtt-timeout", "--max-hostgroup", "--min-hostgroup",
            "--max-parallelism", "--min-parallelism", "--max-scan-delay",
            "--scan-delay", "-PA", "-PS", "-PU", "-PO", "-PY"):
        return OptionEntry(option, ops, check)
    elif option in ("-d", "-v"):
        return OptionLevel(option, ops, check)
    elif option in ("--excludefile", "-iL"):
        return OptionFile(option, ops, check)
    elif option in ("-A", "-O", "-sV", "-n", "-6", "-Pn", "-PE", "-PP", "-PM",
            "-PB", "-sC", "--script-trace", "-F", "-f", "--packet-trace", "-r",
            "--traceroute"):
        return None
    elif option in ("",):
        return OptionExtras(option, ops, check)
    else:
        assert False, "Unknown option %s" % option


class OptionEntry(gtk.Entry):
    def __init__(self, option, ops, check):
        gtk.Entry.__init__(self)
        self.option = option
        self.ops = ops
        self.check = check
        self.connect("changed", self.changed_cb)
        self.check.connect("toggled", self.check_toggled_cb)
        self.update()

    def update(self):
        if self.ops[self.option] is not None:
            self.set_text(str(self.ops[self.option]))
            self.check.set_active(True)
        else:
            self.set_text("")
            self.check.set_active(False)

    def check_toggled_cb(self, check):
        if check.get_active():
            self.ops[self.option] = self.get_text().decode("UTF-8")
        else:
            self.ops[self.option] = None

    def changed_cb(self, widget):
        self.check.set_active(True)
        self.ops[self.option] = self.get_text().decode("UTF-8")


class OptionExtras(gtk.Entry):
    def __init__(self, option, ops, check):
        gtk.Entry.__init__(self)
        self.ops = ops
        self.check = check
        self.connect("changed", self.changed_cb)
        self.check.connect("toggled", self.check_toggled_cb)
        self.update()

    def update(self):
        if len(self.ops.extras) > 0:
            self.set_text(" ".join(self.ops.extras))
            self.check.set_active(True)
        else:
            self.set_text("")
            self.check.set_active(False)

    def check_toggled_cb(self, check):
        if check.get_active():
            self.ops.extras = [self.get_text().decode("UTF-8")]
        else:
            self.ops.extras = []

    def changed_cb(self, widget):
        self.check.set_active(True)
        self.ops.extras = [self.get_text().decode("UTF-8")]


class OptionLevel(gtk.SpinButton):
    def __init__(self, option, ops, check):
        gtk.SpinButton.__init__(self, gtk.Adjustment(0, 0, 10, 1), 0.0, 0)
        self.option = option
        self.ops = ops
        self.check = check
        self.connect("changed", self.changed_cb)
        self.check.connect("toggled", self.check_toggled_cb)
        self.update()

    def update(self):
        level = self.ops[self.option]
        if level is not None and level > 0:
            self.get_adjustment().set_value(int(level))
            self.check.set_active(True)
        else:
            self.get_adjustment().set_value(0)
            self.check.set_active(False)

    def check_toggled_cb(self, check):
        if check.get_active():
            self.ops[self.option] = int(self.get_adjustment().get_value())
        else:
            self.ops[self.option] = 0

    def changed_cb(self, widget):
        self.check.set_active(True)
        self.ops[self.option] = int(self.get_adjustment().get_value())


class OptionFile(gtk.HBox):
    __gsignals__ = {
        "changed": (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE, ())
    }

    def __init__(self, option, ops, check):
        gtk.HBox.__init__(self)

        self.option = option
        self.ops = ops
        self.check = check

        self.entry = gtk.Entry()
        self.pack_start(self.entry, True, True)
        button = HIGButton(stock=gtk.STOCK_OPEN)
        self.pack_start(button, False)

        button.connect("clicked", self.clicked_cb)

        self.entry.connect("changed", lambda x: self.emit("changed"))
        self.entry.connect("changed", self.changed_cb)
        self.check.connect("toggled", self.check_toggled_cb)
        self.update()

    def update(self):
        if self.ops[self.option] is not None:
            self.entry.set_text(self.ops[self.option])
            self.check.set_active(True)
        else:
            self.entry.set_text("")
            self.check.set_active(False)

    def check_toggled_cb(self, check):
        if check.get_active():
            self.ops[self.option] = self.entry.get_text().decode("UTF-8")
        else:
            self.ops[self.option] = None

    def changed_cb(self, widget):
        self.check.set_active(True)
        self.ops[self.option] = self.entry.get_text().decode("UTF-8")

    def clicked_cb(self, button):
        dialog = AllFilesFileChooserDialog(_("Choose file"))
        if dialog.run() == gtk.RESPONSE_OK:
            self.entry.set_text(dialog.get_filename())
        dialog.destroy()


class TargetEntry(gtk.Entry):
    def __init__(self, ops):
        gtk.Entry.__init__(self)
        self.ops = ops
        self.connect("changed", self.changed_cb)
        self.update()

    def update(self):
        self.set_text(u" ".join(self.ops.target_specs))

    def changed_cb(self, widget):
        self.ops.target_specs = self.get_targets()

    def get_targets(self):
        return split_quoted(self.get_text().decode("UTF-8"))


class OptionTab(object):
    def __init__(self, root_tab, ops, update_command, help_buf):
        actions = {'target': self.__parse_target,
                   'option_list': self.__parse_option_list,
                   'option_check': self.__parse_option_check}

        self.ops = ops
        self.update_command = update_command
        self.help_buf = help_buf

        self.profilehelp = ProfileHelp()
        self.notscripttab = False  # assume every tab is scripting tab
        self.widgets_list = []
        for option_element in root_tab.childNodes:
            if (hasattr(option_element, "tagName") and
                    option_element.tagName in actions.keys()):
                parse_func = actions[option_element.tagName]
                widget = parse_func(option_element)
                self.widgets_list.append(widget)

    def __parse_target(self, target_element):
        label = _(target_element.getAttribute(u'label'))
        label_widget = HIGEntryLabel(label)
        target_widget = TargetEntry(self.ops)
        target_widget.connect("changed", self.update_target)
        return label_widget, target_widget

    def __parse_option_list(self, option_list_element):
        children = option_list_element.getElementsByTagName(u'option')

        label_widget = HIGEntryLabel(
                _(option_list_element.getAttribute(u'label')))
        option_list_widget = OptionList(self.ops)

        for child in children:
            option = child.getAttribute(u'option')
            argument = child.getAttribute(u'argument')
            label = _(child.getAttribute(u'label'))
            option_list_widget.append(option, argument, label)
            self.profilehelp.add_label(option, label)
            self.profilehelp.add_shortdesc(
                    option, _(child.getAttribute(u'short_desc')))
            self.profilehelp.add_example(
                    option, child.getAttribute(u'example'))

        option_list_widget.update()

        option_list_widget.connect("changed", self.update_list_option)

        return label_widget, option_list_widget

    def __parse_option_check(self, option_check):
        arg_type = option_check.getAttribute(u'arg_type')
        option = option_check.getAttribute(u'option')
        label = _(option_check.getAttribute(u'label'))
        short_desc = _(option_check.getAttribute(u'short_desc'))
        example = option_check.getAttribute(u'example')

        self.profilehelp.add_label(option, label)
        self.profilehelp.add_shortdesc(option, short_desc)
        self.profilehelp.add_example(option, example)

        check = OptionCheck(option, label)
        auxiliary_widget = get_option_check_auxiliary_widget(
                option, self.ops, check)
        if auxiliary_widget is not None:
            auxiliary_widget.connect("changed", self.update_auxiliary_widget)
            auxiliary_widget.connect(
                    'enter-notify-event', self.enter_notify_event_cb, option)
        else:
            check.set_active(not not self.ops[option])

        check.connect('toggled', self.update_check, auxiliary_widget)
        check.connect('enter-notify-event', self.enter_notify_event_cb, option)

        return check, auxiliary_widget

    def fill_table(self, table, expand_fill=True):
        yopt = (0, gtk.EXPAND | gtk.FILL)[expand_fill]
        for y, widget in enumerate(self.widgets_list):
            if widget[1] is None:
                table.attach(widget[0], 0, 2, y, y + 1, yoptions=yopt)
            else:
                table.attach(widget[0], 0, 1, y, y + 1, yoptions=yopt)
                table.attach(widget[1], 1, 2, y, y + 1, yoptions=yopt)

    def update_auxiliary_widget(self, auxiliary_widget):
        self.update_command()

    def update(self):
        for check, auxiliary_widget in self.widgets_list:
            if auxiliary_widget is not None:
                auxiliary_widget.update()
            else:
                check.set_active(not not self.ops[check.option])

    def update_target(self, entry):
        self.ops.target_specs = entry.get_targets()
        self.update_command()

    def update_check(self, check, auxiliary_widget):
        if auxiliary_widget is None:
            if check.get_active():
                self.ops[check.option] = True
            else:
                self.ops[check.option] = False
        self.update_command()

    def update_list_option(self, widget):
        if widget.last_selected:
            self.ops[widget.last_selected] = None

        opt, arg, label = widget.list[widget.get_active()]
        if opt:
            if arg:
                self.ops[opt] = arg
            else:
                self.ops[opt] = True

        widget.last_selected = opt

        self.show_help_for_option(opt)

        self.update_command()

    def show_help_for_option(self, option):
        self.profilehelp.handler(option)
        text = ""
        if self.profilehelp.get_currentstate() == "Default":
            text = ""
        else:
            text += self.profilehelp.get_label()
            text += "\n\n"
            text += self.profilehelp.get_shortdesc()
            if self.profilehelp.get_example():
                text += "\n\nExample input:\n"
                text += self.profilehelp.get_example()
        self.help_buf.set_text(text)

    def enter_notify_event_cb(self, event, widget, option):
        self.show_help_for_option(option)


class OptionBuilder(object):
    def __init__(self, xml_file, ops, update_func, help_buf):
        """
        xml_file is a UI description xml-file
        ops is an NmapOptions instance
        """
        xml_desc = open(xml_file)
        self.xml = minidom.parse(xml_desc)
        # Closing file to avoid problems with file descriptors
        xml_desc.close()

        self.ops = ops
        self.help_buf = help_buf
        self.update_func = update_func

        self.root_tag = "interface"

        self.xml = self.xml.getElementsByTagName(self.root_tag)[0]

        self.groups = self.__parse_groups()
        self.section_names = self.__parse_section_names()
        self.tabs = self.__parse_tabs()

    def update(self):
        for tab in self.tabs.values():
            tab.update()

    def __parse_section_names(self):
        dic = {}
        for group in self.groups:
            grp = self.xml.getElementsByTagName(group)[0]
            dic[group] = grp.getAttribute(u'label')
        return dic

    def __parse_groups(self):
        return [g_name.getAttribute(u'name') for g_name in
                self.xml.getElementsByTagName(u'groups')[0].getElementsByTagName(u'group')]  # noqa

    def __parse_tabs(self):
        dic = {}
        for tab_name in self.groups:
            if tab_name != "Scripting":
                dic[tab_name] = OptionTab(
                        self.xml.getElementsByTagName(tab_name)[0], self.ops,
                        self.update_func, self.help_buf)
                dic[tab_name].notscripttab = True
            else:
                dic[tab_name] = ScriptInterface(
                        None, self.ops, self.update_func, self.help_buf)
        return dic


class OptionList(gtk.ComboBox):
    def __init__(self, ops):
        self.ops = ops

        self.list = gtk.ListStore(str, str, str)
        gtk.ComboBox.__init__(self, self.list)

        cell = gtk.CellRendererText()
        self.pack_start(cell, True)
        self.add_attribute(cell, 'text', 2)

        self.last_selected = None
        self.options = []

    def update(self):
        selected = 0
        for i, row in enumerate(self.list):
            opt, arg = row[0], row[1]
            if opt == "":
                continue
            if ((not arg and self.ops[opt]) or
                    (arg and str(self.ops[opt]) == arg)):
                selected = i
        self.set_active(selected)

    def append(self, option, argument, label):
        opt = label
        ops = NmapOptions()
        if option is not None and option != "":
            if argument:
                ops[option] = argument
            else:
                ops[option] = True
            opt += " (%s)" % join_quoted(ops.render()[1:])

        self.list.append([option, argument, opt])
        self.options.append(option)


class OptionCheck(gtk.CheckButton):
    def __init__(self, option, label):
        opt = label
        if option is not None and option != "":
            opt += " (%s)" % option

        gtk.CheckButton.__init__(self, opt, use_underline=False)

        self.option = option
