mirror of
https://github.com/sqlmapproject/sqlmap.git
synced 2024-11-26 19:43:48 +03:00
7f055924a7
Minor enhancement to be able to specify the number of seconds before timeout the connection, default is set to 10 seconds. Minor improvement to retry the HTTP request up to three times in case an exception is raised during the connection to the target url. Minor bug fix to correctly catch connection exceptions and notify to the user also if they occur within a thread. Minor code restyling. Updated documentation.
261 lines
8.1 KiB
Python
261 lines
8.1 KiB
Python
#!/usr/bin/env python
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"""
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$Id$
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This file is part of the sqlmap project, http://sqlmap.sourceforge.net.
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Copyright (c) 2006-2008 Bernardo Damele A. G. <bernardo.damele@gmail.com>
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and Daniele Bellucci <daniele.bellucci@gmail.com>
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sqlmap is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation version 2 of the License.
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sqlmap is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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details.
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You should have received a copy of the GNU General Public License along
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with sqlmap; if not, write to the Free Software Foundation, Inc., 51
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Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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"""
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import threading
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import time
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import traceback
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from lib.core.agent import agent
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from lib.core.common import dataToSessionFile
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from lib.core.common import dataToStdout
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from lib.core.common import replaceNewlineTabs
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from lib.core.data import conf
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from lib.core.data import kb
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from lib.core.data import logger
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from lib.core.exception import sqlmapConnectionException
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from lib.core.exception import sqlmapValueException
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from lib.core.exception import sqlmapThreadException
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from lib.core.exception import unhandledException
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from lib.core.progress import ProgressBar
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from lib.core.unescaper import unescaper
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from lib.request.connect import Connect as Request
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def bisection(payload, expression, length=None):
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"""
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Bisection algorithm that can be used to perform blind SQL injection
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on an affected host
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"""
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partialValue = ""
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finalValue = ""
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if kb.dbmsDetected:
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_, _, _, _, fieldToCastStr = agent.getFields(expression)
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nulledCastedField = agent.nullAndCastField(fieldToCastStr)
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expressionReplaced = expression.replace(fieldToCastStr, nulledCastedField, 1)
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expressionUnescaped = unescaper.unescape(expressionReplaced)
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else:
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expressionUnescaped = unescaper.unescape(expression)
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infoMsg = "query: %s" % expressionUnescaped
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logger.info(infoMsg)
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if length and not isinstance(length, int) and length.isdigit():
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length = int(length)
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if length == 0:
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return 0, ""
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showEta = conf.eta and length
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numThreads = min(conf.threads, length)
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threads = []
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if showEta:
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progress = ProgressBar(maxValue=length)
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progressTime = []
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if conf.verbose in ( 1, 2 ) and not showEta:
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if isinstance(length, int) and conf.threads > 1:
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infoMsg = "starting %d threads" % numThreads
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logger.info(infoMsg)
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dataToStdout("[%s] [INFO] retrieved: %s" % (time.strftime("%X"), "_" * length))
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dataToStdout("\r[%s] [INFO] retrieved: " % time.strftime("%X"))
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else:
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dataToStdout("[%s] [INFO] retrieved: " % time.strftime("%X"))
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queriesCount = [0] # As list to deal with nested scoping rules
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def getChar(idx):
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maxValue = 127
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minValue = 0
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while (maxValue - minValue) != 1:
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queriesCount[0] += 1
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limit = ((maxValue + minValue) / 2)
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forgedPayload = payload % (expressionUnescaped, idx, limit)
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result = Request.queryPage(forgedPayload)
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if result == kb.defaultResult:
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minValue = limit
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else:
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maxValue = limit
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if (maxValue - minValue) == 1:
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# NOTE: this first condition should never occur
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if maxValue == 1:
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return None
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else:
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return chr(minValue + 1)
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def etaProgressUpdate(charTime, index):
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if len(progressTime) <= ( (length * 3) / 100 ):
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eta = 0
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else:
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midTime = sum(progressTime) / len(progressTime)
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midTimeWithLatest = (midTime + charTime) / 2
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eta = midTimeWithLatest * (length - index) / conf.threads
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progressTime.append(charTime)
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progress.update(index)
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progress.draw(eta)
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if conf.threads > 1 and isinstance(length, int) and length > 1:
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value = [None] * length
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index = [0] # As list for python nested function scoping
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idxlock = threading.Lock()
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iolock = threading.Lock()
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def downloadThread():
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while True:
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idxlock.acquire()
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if index[0] >= length:
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idxlock.release()
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return
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index[0] += 1
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curidx = index[0]
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idxlock.release()
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charStart = time.time()
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val = getChar(curidx)
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if val == None:
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raise sqlmapValueException, "failed to get character at index %d (expected %d total)" % (curidx, length)
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value[curidx-1] = val
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if showEta:
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etaProgressUpdate(time.time() - charStart, index[0])
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elif conf.verbose in ( 1, 2 ):
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s = "".join([c or "_" for c in value])
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iolock.acquire()
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dataToStdout("\r[%s] [INFO] retrieved: %s" % (time.strftime("%X"), s))
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iolock.release()
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def downloadThreadProxy(numThread):
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try:
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downloadThread()
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except (sqlmapConnectionException, sqlmapValueException), errMsg:
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conf.threadException = True
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logger.error("thread %d: %s" % (numThread + 1, errMsg))
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except KeyboardInterrupt:
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conf.threadException = True
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print
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logger.debug("waiting for threads to finish")
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try:
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while (threading.activeCount() > 1):
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pass
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except KeyboardInterrupt:
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raise sqlmapThreadException, "user aborted"
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except:
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conf.threadException = True
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errMsg = unhandledException()
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logger.error("thread %d: %s" % (numThread + 1, errMsg))
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traceback.print_exc()
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# Start the threads
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for numThread in range(numThreads):
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thread = threading.Thread(target=downloadThreadProxy(numThread))
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thread.start()
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threads.append(thread)
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# And wait for them to all finish
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for thread in threads:
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thread.join()
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# If we have got one single character not correctly fetched it
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# can mean that the connection to the target url was lost
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if None in value:
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for v in value:
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if isinstance(v, str) and v != None:
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partialValue += v
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if partialValue:
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finalValue = partialValue
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infoMsg = "\r[%s] [INFO] partially retrieved: %s" % (time.strftime("%X"), finalValue)
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else:
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finalValue = "".join(value)
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infoMsg = "\r[%s] [INFO] retrieved: %s" % (time.strftime("%X"), finalValue)
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if isinstance(finalValue, str) and len(finalValue) > 0:
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dataToSessionFile(replaceNewlineTabs(finalValue))
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if conf.verbose in ( 1, 2 ) and not showEta and infoMsg:
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dataToStdout(infoMsg)
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else:
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index = 0
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while True:
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index += 1
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charStart = time.time()
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val = getChar(index)
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if val == None:
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break
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finalValue += val
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dataToSessionFile(replaceNewlineTabs(val))
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if showEta:
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etaProgressUpdate(time.time() - charStart, index)
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elif conf.verbose in ( 1, 2 ):
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dataToStdout(val)
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if conf.verbose in ( 1, 2 ) or showEta:
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dataToStdout("\n")
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if ( conf.verbose in ( 1, 2 ) and showEta and len(str(progress)) >= 64 ) or conf.verbose >= 3:
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infoMsg = "retrieved: %s" % finalValue
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logger.info(infoMsg)
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if not partialValue:
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dataToSessionFile("]\n")
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if conf.threadException:
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raise sqlmapThreadException, "something unexpected happen into the threads"
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return queriesCount[0], finalValue
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