#!/usr/bin/env python """ Copyright (c) 2006-2021 sqlmap developers (http://sqlmap.org/) See the file 'LICENSE' for copying permission """ import io import time import types from lib.core.common import getHostHeader from lib.core.common import getSafeExString from lib.core.common import logHTTPTraffic from lib.core.common import readInput from lib.core.convert import getBytes from lib.core.convert import getUnicode from lib.core.data import conf from lib.core.data import kb from lib.core.data import logger from lib.core.enums import CUSTOM_LOGGING from lib.core.enums import HTTP_HEADER from lib.core.enums import HTTPMETHOD from lib.core.enums import REDIRECTION from lib.core.exception import SqlmapConnectionException from lib.core.settings import DEFAULT_COOKIE_DELIMITER from lib.core.settings import MAX_CONNECTION_READ_SIZE from lib.core.settings import MAX_CONNECTION_TOTAL_SIZE from lib.core.settings import MAX_SINGLE_URL_REDIRECTIONS from lib.core.settings import MAX_TOTAL_REDIRECTIONS from lib.core.threads import getCurrentThreadData from lib.request.basic import decodePage from lib.request.basic import parseResponse from thirdparty import six from thirdparty.six.moves import urllib as _urllib class SmartRedirectHandler(_urllib.request.HTTPRedirectHandler): def _get_header_redirect(self, headers): retVal = None if headers: if HTTP_HEADER.LOCATION in headers: retVal = headers[HTTP_HEADER.LOCATION] elif HTTP_HEADER.URI in headers: retVal = headers[HTTP_HEADER.URI] return retVal def _ask_redirect_choice(self, redcode, redurl, method): with kb.locks.redirect: if kb.redirectChoice is None: msg = "got a %d redirect to " % redcode msg += "'%s'. Do you want to follow? [Y/n] " % redurl kb.redirectChoice = REDIRECTION.YES if readInput(msg, default='Y', boolean=True) else REDIRECTION.NO if kb.redirectChoice == REDIRECTION.YES and method == HTTPMETHOD.POST and kb.resendPostOnRedirect is None: msg = "redirect is a result of a " msg += "POST request. Do you want to " msg += "resend original POST data to a new " msg += "location? [%s] " % ("Y/n" if not kb.originalPage else "y/N") kb.resendPostOnRedirect = readInput(msg, default=('Y' if not kb.originalPage else 'N'), boolean=True) if kb.resendPostOnRedirect: self.redirect_request = self._redirect_request def _redirect_request(self, req, fp, code, msg, headers, newurl): return _urllib.request.Request(newurl.replace(' ', '%20'), data=req.data, headers=req.headers, origin_req_host=req.get_origin_req_host()) def http_error_302(self, req, fp, code, msg, headers): start = time.time() content = None redurl = self._get_header_redirect(headers) if not conf.ignoreRedirects else None try: content = fp.read(MAX_CONNECTION_TOTAL_SIZE) except: # e.g. IncompleteRead content = b"" finally: if content: try: # try to write it back to the read buffer so we could reuse it in further steps fp.fp._rbuf.truncate(0) fp.fp._rbuf.write(content) except: pass content = decodePage(content, headers.get(HTTP_HEADER.CONTENT_ENCODING), headers.get(HTTP_HEADER.CONTENT_TYPE)) threadData = getCurrentThreadData() threadData.lastRedirectMsg = (threadData.lastRequestUID, content) redirectMsg = "HTTP redirect " redirectMsg += "[#%d] (%d %s):\r\n" % (threadData.lastRequestUID, code, getUnicode(msg)) if headers: logHeaders = "\r\n".join("%s: %s" % (getUnicode(key.capitalize() if hasattr(key, "capitalize") else key), getUnicode(value)) for (key, value) in headers.items()) else: logHeaders = "" redirectMsg += logHeaders if content: redirectMsg += "\r\n\r\n%s" % getUnicode(content[:MAX_CONNECTION_READ_SIZE]) logHTTPTraffic(threadData.lastRequestMsg, redirectMsg, start, time.time()) logger.log(CUSTOM_LOGGING.TRAFFIC_IN, redirectMsg) if redurl: try: if not _urllib.parse.urlsplit(redurl).netloc: redurl = _urllib.parse.urljoin(req.get_full_url(), redurl) self._infinite_loop_check(req) self._ask_redirect_choice(code, redurl, req.get_method()) except ValueError: redurl = None result = fp if redurl and kb.redirectChoice == REDIRECTION.YES: parseResponse(content, headers) req.headers[HTTP_HEADER.HOST] = getHostHeader(redurl) if headers and HTTP_HEADER.SET_COOKIE in headers: cookies = dict() delimiter = conf.cookieDel or DEFAULT_COOKIE_DELIMITER last = None for part in req.headers.get(HTTP_HEADER.COOKIE, "").split(delimiter) + ([headers[HTTP_HEADER.SET_COOKIE]] if HTTP_HEADER.SET_COOKIE in headers else []): if '=' in part: part = part.strip() key, value = part.split('=', 1) cookies[key] = value last = key elif last: cookies[last] += "%s%s" % (delimiter, part) req.headers[HTTP_HEADER.COOKIE] = delimiter.join("%s=%s" % (key, cookies[key]) for key in cookies) try: result = _urllib.request.HTTPRedirectHandler.http_error_302(self, req, fp, code, msg, headers) except _urllib.error.HTTPError as ex: result = ex # Dirty hack for https://github.com/sqlmapproject/sqlmap/issues/4046 try: hasattr(result, "read") except KeyError: class _(object): pass result = _() # Dirty hack for http://bugs.python.org/issue15701 try: result.info() except AttributeError: def _(self): return getattr(self, "hdrs", {}) result.info = types.MethodType(_, result) if not hasattr(result, "read"): def _(self, length=None): try: retVal = getSafeExString(ex) # Note: pyflakes mistakenly marks 'ex' as undefined (NOTE: tested in both Python2 and Python3) except: retVal = "" return getBytes(retVal) result.read = types.MethodType(_, result) if not getattr(result, "url", None): result.url = redurl if not getattr(result, "code", None): result.code = 999 except: redurl = None result = fp fp.read = io.BytesIO(b"").read else: result = fp threadData.lastRedirectURL = (threadData.lastRequestUID, redurl) result.redcode = code result.redurl = getUnicode(redurl) if six.PY3 else redurl return result http_error_301 = http_error_303 = http_error_307 = http_error_302 def _infinite_loop_check(self, req): if hasattr(req, 'redirect_dict') and (req.redirect_dict.get(req.get_full_url(), 0) >= MAX_SINGLE_URL_REDIRECTIONS or len(req.redirect_dict) >= MAX_TOTAL_REDIRECTIONS): errMsg = "infinite redirect loop detected (%s). " % ", ".join(item for item in req.redirect_dict.keys()) errMsg += "Please check all provided parameters and/or provide missing ones" raise SqlmapConnectionException(errMsg)