# =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
# Mobius Forensic Toolkit
# Copyright (C) 2008,2009,2010,2011,2012,2013,2014,2015,2016,2017,2018,2019,2020,2021,2022 Eduardo Aguiar
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation; either version 2, or (at your option) any later
# version.
#
# 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 GNU General
# Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
import mobius
import pymobius.operating_system
import re
import binascii

# =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
# @brief Generic dataholder class
# =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
class dataholder (object):
  pass

# =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
# @brief Ant: turing.dpapi_sys_mk
# @author Eduardo Aguiar
# Retrieves and decrypts DPAPI System Master Keys
# =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
class Ant (object):

  # =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
  # @brief Initialize object
  # =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
  def __init__ (self, item):
    self.name = 'Turing Win Wifi passwords'
    self.version = '1.0'
    self.__item = item

  # =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
  # @brief Run ant
  # =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
  def run (self):
    self.__secrets = []
    
    for opsys in pymobius.operating_system.scan (self.__item):
      for root in opsys.get_root_folders ():
        try:
          self.__retrieve_secrets (root)
        except Exception, e:
          mobius.core.logf ('WRN %s' % str (e))

  # =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
  # @brief Event <i>on_export_data</i>: Export data to mediator ant
  # @param ant Mediator ant object
  # =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
  def on_export_data (self, ant):
    pass

  # =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
  # @brief Event <i>on_stop</i>: Terminate this ant
  # @param ant Mediator ant object
  # =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
  def on_stop (self, ant):
    count = len ([secret for secret in self.__secrets if secret.blob.is_decrypted ()])

    mobius.core.logf ('INF ant.turing: %d/%d wifi password(s) decrypted' % (count, len (self.__secrets)))

  # =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
  # @brief Event <i>on_key</i>: Process key object
  # @param ant Mediator ant object
  # @param key Key object
  # =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
  def on_key (self, ant, key):
    if key.type != 'dpapi.sys':
      return

    for secret in self.__secrets:
      blob = secret.blob

      if not blob.is_decrypted () and blob.master_key_guid == key.id:
        self.__decrypt_secret (ant, secret, key)
      
  # =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
  # @brief Try to decrypt secret
  # =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
  def __decrypt_secret (self, ant, secret, key):
    blob = secret.blob
          
    if blob.decrypt (key.value):
      value = blob.plain_text.rstrip ('\x00')

      if '\x00' not in value:
        p = dataholder ()
        p.type = 'net.wifi'
        p.value = value
        p.description = "Wifi password. SSID: " + secret.ssid

        p.metadata = []
        p.metadata.append (('Source', secret.source))
        p.metadata.append (('SSID', secret.ssid))
        
        ant.add_password (p)

  # =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
  # @brief Retrieve wifi passwords
  # =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
  def __retrieve_secrets (self, root):        
    folder = root.get_child_by_path ('ProgramData/Microsoft/Wlansvc/Profiles/Interfaces')

    if folder:
      for child in folder.get_children ():
        if child.is_folder () and child.name[0] == '{':
          self.__retrieve_wifi_passwords_from_interface_folder (child)

  # =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
  # @brief Retrieve wifi passwords from interface folder
  # =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
  def __retrieve_wifi_passwords_from_interface_folder (self, folder):
    for child in folder.get_children ():
      if child.is_file () and child.name.lower ().endswith ('.xml'):
        try:
          self.__retrieve_wifi_passwords_from_xml (child)
        except Exception as e:
          mobius.core.logf ('WRN %s' % str (e))

  # =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
  # @brief Retrieve wifi passwords from interface folder
  # =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
  def __retrieve_wifi_passwords_from_xml (self, f):
    if not f or f.is_reallocated ():
      return

    reader = f.new_reader ()
    if not reader:
      return

    # parse data from file
    data = reader.read ()
    name = ''
    key_material = ''
    protected = False

    match = re.search ('<name>(.*?)</name>', data, re.IGNORECASE)
    if match:
      name = match.group (1)

    match = re.search ('<protected>(.*?)</protected>', data, re.IGNORECASE)
    if match:
      protected = match.group (1) == 'true'

    match = re.search ('<keyMaterial>(.*?)</keyMaterial>', data, re.IGNORECASE)
    if match:
      key_material = match.group (1).strip ()

    if not protected or name == 'WFD_GROUP_OWNER_PROFILE':
      return
    
    # store secret
    secret = dataholder ()
    secret.blob = mobius.os.win.dpapi.blob (binascii.unhexlify (key_material))
    secret.source = f.path.replace ('/', '\\')
    secret.ssid = name

    self.__secrets.append (secret)
