sqlmap/lib/request/basic.py

326 lines
13 KiB
Python
Executable File

#!/usr/bin/env python
"""
Copyright (c) 2006-2014 sqlmap developers (http://sqlmap.org/)
See the file 'doc/COPYING' for copying permission
"""
import codecs
import gzip
import logging
import re
import StringIO
import struct
import zlib
from lib.core.common import extractErrorMessage
from lib.core.common import extractRegexResult
from lib.core.common import getPublicTypeMembers
from lib.core.common import getUnicode
from lib.core.common import readInput
from lib.core.common import resetCookieJar
from lib.core.common import singleTimeLogMessage
from lib.core.common import singleTimeWarnMessage
from lib.core.data import conf
from lib.core.data import kb
from lib.core.data import logger
from lib.core.enums import HTTP_HEADER
from lib.core.enums import PLACE
from lib.core.exception import SqlmapCompressionException
from lib.core.settings import DEFAULT_COOKIE_DELIMITER
from lib.core.settings import EVENTVALIDATION_REGEX
from lib.core.settings import MAX_CONNECTION_TOTAL_SIZE
from lib.core.settings import ML
from lib.core.settings import META_CHARSET_REGEX
from lib.core.settings import PARSE_HEADERS_LIMIT
from lib.core.settings import VIEWSTATE_REGEX
from lib.parse.headers import headersParser
from lib.parse.html import htmlParser
from lib.utils.htmlentities import htmlEntities
from thirdparty.chardet import detect
from thirdparty.odict.odict import OrderedDict
def forgeHeaders(items=None):
"""
Prepare HTTP Cookie, HTTP User-Agent and HTTP Referer headers to use when performing
the HTTP requests
"""
items = items or {}
for _ in items.keys():
if items[_] is None:
del items[_]
headers = OrderedDict(conf.httpHeaders)
headers.update(items.items())
class _str(str):
def capitalize(self):
return _str(self)
def title(self):
return _str(self)
_ = headers
headers = OrderedDict()
for key, value in _.items():
success = False
if key.upper() not in (_.upper() for _ in getPublicTypeMembers(HTTP_HEADER, True)):
try:
headers[_str(key)] = value # dirty hack for http://bugs.python.org/issue12455
except UnicodeEncodeError: # don't do the hack on non-ASCII header names (they have to be properly encoded later on)
pass
else:
success = True
if not success:
key = '-'.join(_.capitalize() for _ in key.split('-'))
headers[key] = value
if conf.cj:
if HTTP_HEADER.COOKIE in headers:
for cookie in conf.cj:
if cookie.domain_specified and not conf.hostname.endswith(cookie.domain):
continue
if ("%s=" % cookie.name) in headers[HTTP_HEADER.COOKIE]:
if conf.loadCookies:
conf.httpHeaders = filter(None, ((item if item[0] != HTTP_HEADER.COOKIE else None) for item in conf.httpHeaders))
elif kb.mergeCookies is None:
message = "you provided a HTTP %s header value. " % HTTP_HEADER.COOKIE
message += "The target URL provided its own cookies within "
message += "the HTTP %s header which intersect with yours. " % HTTP_HEADER.SET_COOKIE
message += "Do you want to merge them in futher requests? [Y/n] "
_ = readInput(message, default="Y")
kb.mergeCookies = not _ or _[0] in ("y", "Y")
if kb.mergeCookies:
_ = lambda x: re.sub(r"(?i)\b%s=[^%s]+" % (re.escape(cookie.name), conf.cookieDel or DEFAULT_COOKIE_DELIMITER), "%s=%s" % (cookie.name, getUnicode(cookie.value)), x)
headers[HTTP_HEADER.COOKIE] = _(headers[HTTP_HEADER.COOKIE])
if PLACE.COOKIE in conf.parameters:
conf.parameters[PLACE.COOKIE] = _(conf.parameters[PLACE.COOKIE])
conf.httpHeaders = [(item[0], item[1] if item[0] != HTTP_HEADER.COOKIE else _(item[1])) for item in conf.httpHeaders]
elif not kb.testMode:
headers[HTTP_HEADER.COOKIE] += "%s %s=%s" % (conf.cookieDel or DEFAULT_COOKIE_DELIMITER, cookie.name, getUnicode(cookie.value))
if kb.testMode and not conf.csrfToken:
resetCookieJar(conf.cj)
return headers
def parseResponse(page, headers):
"""
@param page: the page to parse to feed the knowledge base htmlFp
(back-end DBMS fingerprint based upon DBMS error messages return
through the web application) list and absFilePaths (absolute file
paths) set.
"""
if headers:
headersParser(headers)
if page:
htmlParser(page)
def checkCharEncoding(encoding, warn=True):
"""
Checks encoding name, repairs common misspellings and adjusts to
proper namings used in codecs module
>>> checkCharEncoding('iso-8858', False)
'iso8859-1'
>>> checkCharEncoding('en_us', False)
'utf8'
"""
if encoding:
encoding = encoding.lower()
else:
return encoding
# Reference: http://www.destructor.de/charsets/index.htm
translate = {"windows-874": "iso-8859-11", "en_us": "utf8", "macintosh": "iso-8859-1", "euc_tw": "big5_tw", "th": "tis-620", "unicode": "utf8", "utc8": "utf8", "ebcdic": "ebcdic-cp-be", "iso-8859": "iso8859-1", "ansi": "ascii", "gbk2312": "gbk"}
for delimiter in (';', ',', '('):
if delimiter in encoding:
encoding = encoding[:encoding.find(delimiter)].strip()
# popular typos/errors
if "8858" in encoding:
encoding = encoding.replace("8858", "8859") # iso-8858 -> iso-8859
elif "8559" in encoding:
encoding = encoding.replace("8559", "8859") # iso-8559 -> iso-8859
elif "5889" in encoding:
encoding = encoding.replace("5889", "8859") # iso-5889 -> iso-8859
elif "5589" in encoding:
encoding = encoding.replace("5589", "8859") # iso-5589 -> iso-8859
elif "2313" in encoding:
encoding = encoding.replace("2313", "2312") # gb2313 -> gb2312
elif encoding.startswith("x-"):
encoding = encoding[len("x-"):] # x-euc-kr -> euc-kr / x-mac-turkish -> mac-turkish
elif "windows-cp" in encoding:
encoding = encoding.replace("windows-cp", "windows") # windows-cp-1254 -> windows-1254
# name adjustment for compatibility
if encoding.startswith("8859"):
encoding = "iso-%s" % encoding
elif encoding.startswith("cp-"):
encoding = "cp%s" % encoding[3:]
elif encoding.startswith("euc-"):
encoding = "euc_%s" % encoding[4:]
elif encoding.startswith("windows") and not encoding.startswith("windows-"):
encoding = "windows-%s" % encoding[7:]
elif encoding.find("iso-88") > 0:
encoding = encoding[encoding.find("iso-88"):]
elif encoding.startswith("is0-"):
encoding = "iso%s" % encoding[4:]
elif encoding.find("ascii") > 0:
encoding = "ascii"
elif encoding.find("utf8") > 0:
encoding = "utf8"
# Reference: http://philip.html5.org/data/charsets-2.html
if encoding in translate:
encoding = translate[encoding]
elif encoding in ("null", "{charset}", "*"):
return None
# Reference: http://www.iana.org/assignments/character-sets
# Reference: http://docs.python.org/library/codecs.html
try:
codecs.lookup(encoding)
except LookupError:
if warn:
warnMsg = "unknown web page charset '%s'. " % encoding
warnMsg += "Please report by e-mail to %s." % ML
singleTimeLogMessage(warnMsg, logging.WARN, encoding)
encoding = None
return encoding
def getHeuristicCharEncoding(page):
"""
Returns page encoding charset detected by usage of heuristics
Reference: http://chardet.feedparser.org/docs/
"""
retVal = detect(page)["encoding"]
if retVal:
infoMsg = "heuristics detected web page charset '%s'" % retVal
singleTimeLogMessage(infoMsg, logging.INFO, retVal)
return retVal
def decodePage(page, contentEncoding, contentType):
"""
Decode compressed/charset HTTP response
"""
if not page or (conf.nullConnection and len(page) < 2):
return getUnicode(page)
if isinstance(contentEncoding, basestring) and contentEncoding.lower() in ("gzip", "x-gzip", "deflate"):
if not kb.pageCompress:
return None
try:
if contentEncoding.lower() == "deflate":
data = StringIO.StringIO(zlib.decompress(page, -15)) # Reference: http://stackoverflow.com/questions/1089662/python-inflate-and-deflate-implementations
else:
data = gzip.GzipFile("", "rb", 9, StringIO.StringIO(page))
size = struct.unpack("<l", page[-4:])[0] # Reference: http://pydoc.org/get.cgi/usr/local/lib/python2.5/gzip.py
if size > MAX_CONNECTION_TOTAL_SIZE:
raise Exception("size too large")
page = data.read()
except Exception, msg:
errMsg = "detected invalid data for declared content "
errMsg += "encoding '%s' ('%s')" % (contentEncoding, msg)
singleTimeLogMessage(errMsg, logging.ERROR)
warnMsg = "turning off page compression"
singleTimeWarnMessage(warnMsg)
kb.pageCompress = False
raise SqlmapCompressionException
if not conf.charset:
httpCharset, metaCharset = None, None
# Reference: http://stackoverflow.com/questions/1020892/python-urllib2-read-to-unicode
if contentType and (contentType.find("charset=") != -1):
httpCharset = checkCharEncoding(contentType.split("charset=")[-1])
metaCharset = checkCharEncoding(extractRegexResult(META_CHARSET_REGEX, page))
if (any((httpCharset, metaCharset)) and not all((httpCharset, metaCharset)))\
or (httpCharset == metaCharset and all((httpCharset, metaCharset))):
kb.pageEncoding = httpCharset or metaCharset
debugMsg = "declared web page charset '%s'" % kb.pageEncoding
singleTimeLogMessage(debugMsg, logging.DEBUG, debugMsg)
else:
kb.pageEncoding = None
else:
kb.pageEncoding = conf.charset
# can't do for all responses because we need to support binary files too
if contentType and not isinstance(page, unicode) and "text/" in contentType.lower():
if kb.heuristicMode:
kb.pageEncoding = kb.pageEncoding or checkCharEncoding(getHeuristicCharEncoding(page))
page = getUnicode(page, kb.pageEncoding)
else:
# e.g. &#195;&#235;&#224;&#226;&#224;
if "&#" in page:
page = re.sub(r"&#(\d{1,3});", lambda _: chr(int(_.group(1))) if int(_.group(1)) < 256 else _.group(0), page)
# e.g. %20%28%29
if "%" in page:
page = re.sub(r"%([0-9a-fA-F]{2})", lambda _: _.group(1).decode("hex"), page)
# e.g. &amp;
page = re.sub(r"&([^;]+);", lambda _: chr(htmlEntities[_.group(1)]) if htmlEntities.get(_.group(1), 256) < 256 else _.group(0), page)
kb.pageEncoding = kb.pageEncoding or checkCharEncoding(getHeuristicCharEncoding(page))
page = getUnicode(page, kb.pageEncoding)
# e.g. &#8217;&#8230;&#8482;
if "&#" in page:
def _(match):
retVal = match.group(0)
try:
retVal = unichr(int(match.group(1)))
except ValueError:
pass
return retVal
page = re.sub(r"&#(\d+);", _, page)
# e.g. &zeta;
page = re.sub(r"&([^;]+);", lambda _: unichr(htmlEntities[_.group(1)]) if htmlEntities.get(_.group(1), 0) > 255 else _.group(0), page)
return page
def processResponse(page, responseHeaders):
kb.processResponseCounter += 1
parseResponse(page, responseHeaders if kb.processResponseCounter < PARSE_HEADERS_LIMIT else None)
if conf.parseErrors:
msg = extractErrorMessage(page)
if msg:
logger.warning("parsed DBMS error message: '%s'" % msg)
if kb.originalPage is None:
for regex in (EVENTVALIDATION_REGEX, VIEWSTATE_REGEX):
match = re.search(regex, page)
if match and PLACE.POST in conf.parameters:
name, value = match.groups()
if PLACE.POST in conf.paramDict and name in conf.paramDict[PLACE.POST]:
if conf.paramDict[PLACE.POST][name] in page:
continue
conf.paramDict[PLACE.POST][name] = value
conf.parameters[PLACE.POST] = re.sub("(?i)(%s=)[^&]+" % name, r"\g<1>%s" % value, conf.parameters[PLACE.POST])