mirror of
https://github.com/sqlmapproject/sqlmap.git
synced 2024-11-22 17:46:37 +03:00
120 lines
4.1 KiB
Python
120 lines
4.1 KiB
Python
#!/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 difflib import SequenceMatcher
|
|
|
|
from lib.core.common import removeDynamicContent
|
|
from lib.core.common import wasLastRequestDBMSError
|
|
from lib.core.data import conf
|
|
from lib.core.data import kb
|
|
from lib.core.data import logger
|
|
from lib.core.settings import CONSTANT_RATIO
|
|
from lib.core.settings import DIFF_TOLERANCE
|
|
|
|
def comparison(page, headers=None, getSeqMatcher=False, pageLength=None):
|
|
if page is None and pageLength is None:
|
|
return None
|
|
|
|
regExpResults = None
|
|
conf.seqMatcher.set_seq1(kb.pageTemplate)
|
|
|
|
if page:
|
|
# String to be excluded before calculating page hash
|
|
if conf.eString and conf.eString in page:
|
|
index = page.index(conf.eString)
|
|
length = len(conf.eString)
|
|
pageWithoutString = page[:index]
|
|
pageWithoutString += page[index+length:]
|
|
page = pageWithoutString
|
|
|
|
# Regular expression matches to be excluded before calculating page hash
|
|
if conf.eRegexp:
|
|
regExpResults = re.findall(conf.eRegexp, page, re.I | re.M)
|
|
|
|
if regExpResults:
|
|
for regExpResult in regExpResults:
|
|
index = page.index(regExpResult)
|
|
length = len(regExpResult)
|
|
pageWithoutRegExp = page[:index]
|
|
pageWithoutRegExp += page[index+length:]
|
|
page = pageWithoutRegExp
|
|
|
|
# String to match in page when the query is valid
|
|
if conf.string:
|
|
return conf.string in page
|
|
|
|
# Regular expression to match in page when the query is valid
|
|
if conf.regexp:
|
|
return re.search(conf.regexp, page, re.I | re.M) is not None
|
|
|
|
# In case of an DBMS error page return None
|
|
if wasLastRequestDBMSError():
|
|
return None
|
|
|
|
# Dynamic content lines to be excluded before comparison
|
|
if not kb.nullConnection and not conf.longestCommon:
|
|
page = removeDynamicContent(page)
|
|
conf.seqMatcher.set_seq1(removeDynamicContent(kb.pageTemplate))
|
|
|
|
if not pageLength:
|
|
pageLength = len(page)
|
|
|
|
if kb.locks.seqLock:
|
|
kb.locks.seqLock.acquire()
|
|
|
|
if conf.longestCommon:
|
|
(firstPage, secondPage) = (conf.seqMatcher.a, page)
|
|
match = SequenceMatcher(None, firstPage, secondPage).find_longest_match(0, len(firstPage), 0, len(secondPage))
|
|
ratio = round(SequenceMatcher(None, firstPage[match[0]:match[0]+match[2]], secondPage[match[1]:match[1]+match[2]]).ratio(), 3)
|
|
|
|
elif not conf.eRegexp and not conf.eString and kb.nullConnection and pageLength:
|
|
ratio = 1. * pageLength / len(conf.seqMatcher.a)
|
|
|
|
if ratio > 1.:
|
|
ratio = 1. / ratio
|
|
else:
|
|
conf.seqMatcher.set_seq2(page)
|
|
ratio = round(conf.seqMatcher.quick_ratio(), 3)
|
|
|
|
if kb.locks.seqLock:
|
|
kb.locks.seqLock.release()
|
|
|
|
# If the url is stable and we did not set yet the match ratio and the
|
|
# current injected value changes the url page content
|
|
if conf.matchRatio is None:
|
|
if conf.thold:
|
|
conf.matchRatio = conf.thold
|
|
|
|
elif kb.pageStable and ratio > 0.6 and ratio < 0.99:
|
|
conf.matchRatio = ratio
|
|
logger.debug("setting match ratio for current parameter to %.3f" % conf.matchRatio)
|
|
|
|
elif not kb.pageStable or ( kb.pageStable and ratio < 0.6 ):
|
|
conf.matchRatio = CONSTANT_RATIO
|
|
logger.debug("setting match ratio for current parameter to default value 0.900")
|
|
|
|
# If it has been requested to return the ratio and not a comparison
|
|
# response
|
|
if getSeqMatcher:
|
|
return ratio
|
|
|
|
elif ratio == 1:
|
|
return True
|
|
|
|
elif conf.matchRatio is None:
|
|
return None
|
|
|
|
else:
|
|
if conf.matchRatio == CONSTANT_RATIO or conf.thold:
|
|
return ratio > conf.matchRatio
|
|
else:
|
|
return (ratio - conf.matchRatio) > DIFF_TOLERANCE
|