#!/usr/bin/env python

"""
$Id$

Copyright (c) 2006-2010 sqlmap developers (http://sqlmap.sourceforge.net/)
See the file 'doc/COPYING' for copying permission
"""


import os
import time

from subprocess import PIPE
from subprocess import STDOUT
from subprocess import Popen as execute

from lib.core.common import dataToStdout
from lib.core.common import decloakToMkstemp
from lib.core.common import pollProcess
from lib.core.data import logger
from lib.core.data import paths
from lib.core.settings import PLATFORM

class UPX:
    """
    This class defines methods to compress binary files with UPX (Ultimate
    Packer for eXecutables).

    Reference:
    * http://upx.sourceforge.net    
    """

    def __initialize(self, srcFile, dstFile=None):
        if PLATFORM == "mac":
            self.__upxPath = "%s/upx/macosx/upx" % paths.SQLMAP_CONTRIB_PATH

        elif PLATFORM in ( "ce", "nt" ):
            self.__upxTempExe = decloakToMkstemp("%s\upx\windows\upx.exe_" % paths.SQLMAP_CONTRIB_PATH, suffix=".exe")
            self.__upxPath = self.__upxTempExe.name
            self.__upxTempExe.close() #needed for execution rights

        elif PLATFORM == "posix":
            self.__upxPath = "%s/upx/linux/upx" % paths.SQLMAP_CONTRIB_PATH

        else:
            warnMsg  = "unsupported platform for the compression tool "
            warnMsg += "(upx), sqlmap will continue anyway"
            logger.warn(warnMsg)

            self.__upxPath = "%s/upx/linux/upx" % paths.SQLMAP_CONTRIB_PATH

        self.__upxCmd = "%s -9 -qq %s" % (self.__upxPath, srcFile)

        if dstFile:
            self.__upxCmd += " -o %s" % dstFile

    def pack(self, srcFile, dstFile=None):
        self.__initialize(srcFile, dstFile)

        logger.debug("executing local command: %s" % self.__upxCmd)
        process = execute(self.__upxCmd, shell=True, stdout=PIPE, stderr=STDOUT)
        
        dataToStdout("\r[%s] [INFO] compression in progress " % time.strftime("%X"))
        pollProcess(process)
        upxStdout, upxStderr = process.communicate()

        if hasattr(self, '__upxTempExe'):
            os.remove(self.__upxTempExe.name)

        msg = "failed to compress the file"

        if "NotCompressibleException" in upxStdout:
            msg += " because you provided a Metasploit version above "
            msg += "3.3-dev revision 6681. This will not inficiate "
            msg += "the correct execution of sqlmap. It might "
            msg += "only slow down a bit the execution"
            logger.debug(msg)

        elif upxStderr:
            logger.warn(msg)

        else:
            return os.path.getsize(srcFile)

        return None

    def unpack(self, srcFile, dstFile=None):
        pass

    def verify(self, filePath):
        pass

upx = UPX()