#!/usr/bin/env python

"""
$Id$

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

import re

from lib.controller.action import action
from lib.controller.checks import checkSqlInjection
from lib.controller.checks import heuristicCheckSqlInjection
from lib.controller.checks import checkDynParam
from lib.controller.checks import checkStability
from lib.controller.checks import checkString
from lib.controller.checks import checkRegexp
from lib.controller.checks import checkConnection
from lib.controller.checks import checkNullConnection
from lib.core.common import getUnicode
from lib.core.common import paramToDict
from lib.core.common import parseTargetUrl
from lib.core.common import readInput
from lib.core.data import conf
from lib.core.data import kb
from lib.core.data import logger
from lib.core.exception import exceptionsTuple
from lib.core.exception import sqlmapNotVulnerableException
from lib.core.exception import sqlmapSilentQuitException
from lib.core.exception import sqlmapUserQuitException
from lib.core.session import setInjection
from lib.core.session import setMatchRatio
from lib.core.target import initTargetEnv
from lib.core.target import setupTargetEnv
from lib.core.target import findPageForms
from lib.utils.parenthesis import checkForParenthesis

def __selectInjection(injData):
    """
    Selection function for injection place, parameters and type.
    """

    message  = "there were multiple injection points, please select the "
    message += "one to use to go ahead:\n"

    for i in xrange(0, len(injData)):
        injPlace     = injData[i][0]
        injParameter = injData[i][1]
        injType      = injData[i][2]

        message += "[%d] place: %s, parameter: " % (i, injPlace)
        message += "%s, type: %s" % (injParameter, injType)

        if i == 0:
            message += " (default)"

        message += "\n"

    message += "[q] Quit"
    select   = readInput(message, default="0")

    if not select:
        index = 0

    elif select.isdigit() and int(select) < len(injData) and int(select) >= 0:
        index = int(select)

    elif select[0] in ( "Q", "q" ):
        return "Quit"

    else:
        warnMsg = "invalid choice, retry"
        logger.warn(warnMsg)
        __selectInjection(injData)

    return injData[index]

def start():
    """
    This function calls a function that performs checks on both URL
    stability and all GET, POST, Cookie and User-Agent parameters to
    check if they are dynamic and SQL injection affected
    """

    if not conf.start:
        return False

    if conf.direct:
        initTargetEnv()
        setupTargetEnv()
        action()
        return True

    if conf.url:
        if conf.forms:
            findPageForms()
        else:
            kb.targetUrls.add(( conf.url, conf.method, conf.data, conf.cookie ))

    if conf.configFile and not kb.targetUrls:
        errMsg  = "you did not edit the configuration file properly, set "
        errMsg += "the target url, list of targets or google dork"
        logger.error(errMsg)
        return False

    if kb.targetUrls and len(kb.targetUrls) > 1:
        infoMsg = "sqlmap got a total of %d targets" % len(kb.targetUrls)
        logger.info(infoMsg)

    hostCount             = 0
    cookieStr             = ""
    setCookieAsInjectable = True

    for targetUrl, targetMethod, targetData, targetCookie in kb.targetUrls:
        try:
            conf.url    = targetUrl
            conf.method = targetMethod
            conf.data   = targetData
            conf.cookie = targetCookie
            injData     = []

            initTargetEnv()
            parseTargetUrl()

            testSqlInj = False
            if "GET" in conf.parameters:
                for parameter in re.findall(r"([^=]+)=[^&]+&?", conf.parameters["GET"]):
                    paramKey = (conf.hostname, conf.path, "GET", parameter)
                    if paramKey not in kb.testedParams:
                        testSqlInj = True
                        break
            else:
                paramKey = (conf.hostname, conf.path, None, None)
                if paramKey not in kb.testedParams:
                    testSqlInj = True

            if not testSqlInj:
                infoMsg = "skipping '%s'" % targetUrl
                logger.info(infoMsg)
                continue

            if conf.multipleTargets:
                hostCount += 1
                message = "url %d:\n%s %s" % (hostCount, conf.method or "GET", targetUrl)

                if conf.cookie:
                    message += "\nCookie: %s" % conf.cookie

                if conf.data:
                    message += "\nPOST data: %s" % conf.data

                message += "\ndo you want to test this url? [Y/n/q]"
                test = readInput(message, default="Y")

                if not test:
                    pass
                elif test[0] in ("n", "N"):
                    continue
                elif test[0] in ("q", "Q"):
                    break

                logMsg = "testing url %s" % targetUrl
                logger.info(logMsg)

            setupTargetEnv()

            if not checkConnection() or not checkString() or not checkRegexp():
                continue

            if conf.nullConnection:
                checkNullConnection()

            if not conf.dropSetCookie and conf.cj:
                for _, cookie in enumerate(conf.cj):
                    cookie = getUnicode(cookie)
                    index  = cookie.index(" for ")

                    cookieStr += "%s;" % cookie[8:index]

                if cookieStr:
                    cookieStr = cookieStr[:-1]

                    if "Cookie" in conf.parameters:
                        message  = "you provided an HTTP Cookie header value. "
                        message += "The target url provided its own Cookie within "
                        message += "the HTTP Set-Cookie header. Do you want to "
                        message += "continue using the HTTP Cookie values that "
                        message += "you provided? [Y/n] "
                        test = readInput(message, default="Y")

                        if not test or test[0] in ("y", "Y"):
                            setCookieAsInjectable = False

                    if setCookieAsInjectable:
                        conf.httpHeaders.append(("Cookie", cookieStr))
                        conf.parameters["Cookie"] = cookieStr
                        __paramDict = paramToDict("Cookie", cookieStr)

                        if __paramDict:
                            conf.paramDict["Cookie"] = __paramDict
                            # TODO: consider the following line in __setRequestParams()
                            __testableParameters = True

            if not kb.injPlace or not kb.injParameter or not kb.injType:
                if not conf.string and not conf.regexp and not conf.eRegexp:
                    # NOTE: this is not needed anymore, leaving only to display
                    # a warning message to the user in case the page is not stable
                    checkStability()

                for place in conf.parameters.keys():
                    if not conf.paramDict.has_key(place):
                        continue

                    paramDict = conf.paramDict[place]
                    for parameter, value in paramDict.items():
                        testSqlInj = True
                        paramKey = (conf.hostname, conf.path, place, parameter)

                        if paramKey in kb.testedParams:
                            testSqlInj = False

                            infoMsg = "skipping previously processed %s parameter '%s'" % (place, parameter)
                            logger.info(infoMsg)

                        # Avoid dinamicity test if the user provided the
                        # parameter manually
                        elif parameter in conf.testParameter:
                            pass

                        elif not checkDynParam(place, parameter, value):
                            warnMsg = "%s parameter '%s' is not dynamic" % (place, parameter)
                            logger.warn(warnMsg)
                            testSqlInj = False

                        else:
                            logMsg = "%s parameter '%s' is dynamic" % (place, parameter)
                            logger.info(logMsg)

                        kb.testedParams.add(paramKey)

                        if testSqlInj:
                            heuristicCheckSqlInjection(place, parameter, value)

                            for parenthesis in range(0, 4):
                                logMsg  = "testing sql injection on %s " % place
                                logMsg += "parameter '%s' with " % parameter
                                logMsg += "%d parenthesis" % parenthesis
                                logger.info(logMsg)

                                injType = checkSqlInjection(place, parameter, value, parenthesis)

                                if injType:
                                    injData.append((place, parameter, injType))
                                    break

                                else:
                                    infoMsg  = "%s parameter '%s' is not " % (place, parameter)
                                    infoMsg += "injectable with %d parenthesis" % parenthesis
                                    logger.info(infoMsg)

                            if not injData:
                                warnMsg  = "%s parameter '%s' is not " % (place, parameter)
                                warnMsg += "injectable"
                                logger.warn(warnMsg)

            if not kb.injPlace or not kb.injParameter or not kb.injType:
                if len(injData) == 1:
                    injDataSelected = injData[0]

                elif len(injData) > 1:
                    injDataSelected = __selectInjection(injData)

                else:
                    raise sqlmapNotVulnerableException, "all parameters are not injectable"

                if injDataSelected == "Quit":
                    return

                else:
                    kb.injPlace, kb.injParameter, kb.injType = injDataSelected
                    setInjection()

            if kb.injPlace and kb.injParameter and kb.injType:
                if conf.multipleTargets:
                    message = "do you want to exploit this SQL injection? [Y/n] "
                    exploit = readInput(message, default="Y")

                    condition = not exploit or exploit[0] in ("y", "Y")
                else:
                    condition = True

                if condition:
                    if kb.paramMatchRatio:
                        conf.matchRatio = kb.paramMatchRatio[(kb.injPlace, kb.injParameter)]
                        setMatchRatio()
                    checkForParenthesis()
                    action()

        except sqlmapSilentQuitException:
            raise

        except sqlmapUserQuitException:
            raise

        except exceptionsTuple, e:
            e = getUnicode(e)

            if conf.multipleTargets:
                e += ", skipping to next url"
                logger.error(e)
            else:
                logger.critical(e)
                return False

    if conf.loggedToOut:
        logger.info("Fetched data logged to text files under '%s'" % conf.outputPath)

    return True