#!/bin/env python

 # -*- coding: utf-8 -*-

 # ------------------------------------------------------------

 # cygwin command

 # 

 # executes a cygwin command inside the opensecurity project

 #

 # Autor: Mihai Bartha, <mihai.bartha@ait.ac.at>

 #        Oliver Maurhart, <oliver.maurhart@ait.ac.at>

 #

 # Copyright (C) 2013 AIT Austrian Institute of Technology

 # AIT Austrian Institute of Technology GmbH

 # Donau-City-Strasse 1 | 1220 Vienna | Austria

 # http://www.ait.ac.at

 #

 # 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 version 2.

 # 

 # 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, write to the Free Software

 # Foundation, Inc., 51 Franklin Street, Fifth Floor, 

 # Boston, MA  02110-1301, USA.

 # ------------------------------------------------------------

 # ------------------------------------------------------------

 # imports

 import os

 import subprocess

 import sys

 import _winreg

 from subprocess import Popen, PIPE, call, STARTUPINFO, _subprocess

 import threading

 # local

 from environment import Environment

 from opensecurity_util import logger, setupLogger, OpenSecurityException

 # ------------------------------------------------------------

 # code

 def once(theClass):

     """get the path to our local cygwin installment"""

     home_drive = os.path.expandvars("%HOMEDRIVE%") + os.sep

     path_hint = [ 

         os.path.abspath(os.path.join(Environment('OpenSecurity').prefix_path, '..', 'cygwin')), 

         os.path.abspath(os.path.join(Environment('OpenSecurity').prefix_path, '..', 'cygwin64')), 

         os.path.abspath(os.path.join(home_drive, 'cygwin')),

         os.path.abspath(os.path.join(home_drive, 'cygwin64'))

     ]

     path_valid = [ p for p in path_hint if os.path.exists(p) ]

     theClass.cygwin_root = path_valid[0]

     theClass.cygwin_bin = os.path.join(theClass.cygwin_root, 'bin') + os.path.sep

     theClass.cygwin_bash = os.path.join(theClass.cygwin_bin, 'bash.exe')

     theClass.cygwin_ssh = os.path.join(theClass.cygwin_bin, 'ssh.exe')

     theClass.cygwin_x11 = os.path.join(theClass.cygwin_bin, 'XWin.exe')

     theClass.win_cmd = os.environ.get("COMSPEC", "cmd.exe") 

     """get the path to the VirtualBox installation on this system"""

     try:

         k = _winreg.OpenKey(_winreg.HKEY_LOCAL_MACHINE, 'SOFTWARE\Oracle\VirtualBox')

         theClass.vbox_root = _winreg.QueryValueEx(k, 'InstallDir')[0]

         theClass.vbox_man = os.path.join(theClass.vbox_root, 'VBoxManage.exe')

         _winreg.CloseKey(k)

     except:

         pass

     return theClass

 @once

 class Cygwin(object):

     cygwin_root = ''

     cygwin_bin = ''

     cygwin_bash = ''

     cygwin_ssh = ''

     cygwin_x11 = ''

     vbox_root = ''

     vbox_man = ''

     win_cmd = ''

     """Some nifty methods working with Cygwin"""

     def __call__(self, command, arguments, wait_return=True, window = False):

         """make an instance of this object act as a function"""

         return self.execute(command, arguments, wait_return, window)

     @staticmethod

     def root():

         return Cygwin.cygwin_root

     @staticmethod

     def bin():

         return Cygwin.cygwin_bin

     @staticmethod

     def bash():

         return Cygwin.cygwin_bash

     @staticmethod    

     def ssh():

         return Cygwin.cygwin_ssh

     @staticmethod    

     def x11():

         return Cygwin.cygwin_x11

     @staticmethod

     def vboxman():

         return Cygwin.vbox_man

     @staticmethod

     def cmd():

         return Cygwin.win_cmd

     executeLock = threading.Lock()

     #executes command on host system

     @staticmethod

     def execute(program, arguments, wait_return=True, window = False):

         _startupinfo = STARTUPINFO()

         if not window:

             _startupinfo.dwFlags |= _subprocess.STARTF_USESHOWWINDOW

             _startupinfo.wShowWindow = _subprocess.SW_HIDE

             #logger.debug('trying to launch: ' + program + ' ' + ''.join(arguments))

         res_stderr = None

         try:

             process = Popen(executable=program, args=' ' + arguments, startupinfo = _startupinfo, stdin=PIPE, stdout=PIPE, stderr=PIPE, shell = False)

             logger.debug('Launched: ' + program + ' ' + ''.join(arguments))

             if not wait_return:

                 return [0, 'working in background', '']

             result = process.wait()

             res_stdout = process.stdout.read();

             res_stderr = process.stderr.read();

         except Exception as ex:

             res_stderr = ''.join(ex.args)

             result = -1 

         if result != 0:

             logger.error('Failed to execute cygwin command.\n\tcommand=' + program + ' ' + ''.join(arguments) + '\n' + res_stderr)

             raise OpenSecurityException('Failed to execute cygwin command.\n\tcommand=' + program + ' ' + ''.join(arguments) + '\n' + res_stderr)

         return result, res_stdout, res_stderr

     @staticmethod

     def vboxExecute(command, wait_return=True, window = False, bash_opts=''):

         if Cygwin.executeLock.acquire(True):

             retry = 0

             while retry < 3:

                 try:

                     result = Cygwin.execute(Cygwin.vbox_man, command, wait_return, window)

                     Cygwin.executeLock.release()

                     return result

                 except OpenSecurityException as inst:

                     retry+=1

             Cygwin.executeLock.release()

             raise inst

         return result

     @staticmethod

     def bashExecute(command, wait_return=True, window = False, bash_opts=''):

         command = bash_opts + ' -l -c '  + command

         return Cygwin.execute(Cygwin.cygwin_bash, command, wait_return, window)

     @staticmethod

     def cmdExecute(command, wait_return=True, window = False, bash_opts=''):

         command = ' /c ' + command 

         return Cygwin.execute(Cygwin.win_cmd, command, wait_return, window)

     # executes command over ssh on guest vm

     @staticmethod

     def sshExecute(command, address, user_name, certificate, wait_return=True, window = False):

         command = ' -v -i "' + certificate + '" ' + user_name + '@' + address + ' ' + command        

         return Cygwin.execute(Cygwin.cygwin_ssh, command, wait_return, window)     

     #machineFolder + '/' + vm_name + '/dvm_key

     #address = self.getHostOnlyIP(vm_name)

     #machineFolder = self.getDefaultMachineFolder()

     #machineFolder = Cygwin.cygwinPath(machineFolder)

     # executes command over ssh on guest vm with X forwarding

     @staticmethod

     def sshExecuteX11(command, address, user_name, certificate, wait_return=True):

         return Cygwin.bashExecute('"DISPLAY=:0.0 /usr/bin/ssh -v -Y -i \\"' + certificate +'\\" ' + user_name + '@' + address + ' ' + command + '\"')

     @staticmethod

     def is_X11_running():

         """check if we can connect to a X11 running instance"""

         p = Cygwin.bashExecute('"DISPLAY=:0 /usr/bin/xset -q"')

         return p[0] == 0

     @staticmethod

     def start_X11():

         """start X11 in the background (if not already running) on DISPLAY=:0"""

         # do not start if already running

         if Cygwin.is_X11_running():

             return           

         # launch X11 (forget output and return immediately)

         return Cygwin.execute(Cygwin.cygwin_x11, ':0 -multiwindow', wait_return = False, window = False)

     @staticmethod    

     def cygPath(path):

         cmd = '"/usr/bin/cygpath -u \\"' + path + '\\""'

         return Cygwin.bashExecute(cmd)[1].rstrip('\n')

 # start

 if __name__ == "__main__":

     logger = setupLogger('Cygwin')

     c = Cygwin()

     logger.info(c.root())

     logger.info(c.bin())

     logger.info(c.bash())

     logger.info(c.ssh())

     c.cygPath('C:')

     c.start_X11()