slightly faster and thread safer inference

lib/controller/checks.py

@@ -51,6 +51,7 @@ from lib.core.exception import sqlmapUserQuitException
 from lib.core.session import setDynamicMarkings
 from lib.core.settings import CONSTANT_RATIO
 from lib.core.settings import UPPER_RATIO_BOUND
+from lib.core.threads import getCurrentThreadData
 from lib.core.unescaper import unescaper
 from lib.request.connect import Connect as Request
 from lib.request.templates import getPageTemplate
@@ -595,11 +596,12 @@ def checkDynamicContent(firstPage, secondPage):
         logger.debug(debugMsg)
         return
     
-    conf.seqMatcher.set_seq1(firstPage)
+    seqMatcher = getCurrentThreadData().seqMatcher
-    conf.seqMatcher.set_seq2(secondPage)
+    seqMatcher.set_seq1(firstPage)
+    seqMatcher.set_seq2(secondPage)
 
     # In case of an intolerable difference turn on dynamicity removal engine
-    if conf.seqMatcher.quick_ratio() <= UPPER_RATIO_BOUND:
+    if seqMatcher.quick_ratio() <= UPPER_RATIO_BOUND:
         findDynamicContent(firstPage, secondPage)
 
         count = 0

lib/core/common.py

@@ -2080,10 +2080,11 @@ def getComparePageRatio(firstPage, secondPage, filtered=False):
     if filtered:
         (firstPage, secondPage) = map(getFilteredPageContent, (firstPage, secondPage))
 
-    conf.seqMatcher.set_seq1(firstPage)
+    seqMatcher = getCurrentThreadData().seqMatcher
-    conf.seqMatcher.set_seq2(secondPage)
+    seqMatcher.set_seq1(firstPage)
+    seqMatcher.set_seq2(secondPage)
 
-    return conf.seqMatcher.quick_ratio()
+    return seqMatcher.quick_ratio()
 
 def openFile(filename, mode='r'):
     """

lib/core/option.py

@@ -1077,8 +1077,6 @@ def __setConfAttributes():
     conf.port             = None
     conf.redirectHandled  = False
     conf.scheme           = None
-    #conf.seqMatcher       = difflib.SequenceMatcher(lambda x: x in " \t")
-    conf.seqMatcher       = difflib.SequenceMatcher(None)
     conf.sessionFP        = None
     conf.start            = True
     conf.tests            = []
@@ -1135,7 +1133,6 @@ def __setKnowledgeBaseAttributes(flushAll=True):
     kb.locks           = advancedDict()
     kb.locks.cacheLock = threading.Lock()
     kb.locks.logLock   = threading.Lock()
-    kb.locks.seqLock   = None
 
     kb.matchRatio      = None
     kb.nullConnection  = None

lib/core/threads.py

@@ -7,6 +7,7 @@ Copyright (c) 2006-2010 sqlmap developers (http://sqlmap.sourceforge.net/)
 See the file 'doc/COPYING' for copying permission
 """
 
+import difflib
 import threading
 
 from lib.core.data import kb
@@ -22,6 +23,7 @@ class ThreadData():
         self.lastHTTPError      = None
         self.lastQueryDuration  = 0
         self.lastRequestUID     = 0
+        self.seqMatcher         = difflib.SequenceMatcher(None)
         self.valueStack         = []
 
 def getCurrentThreadUID():

lib/request/comparison.py

@@ -22,13 +22,16 @@ from lib.core.settings import CONSTANT_RATIO
 from lib.core.settings import DIFF_TOLERANCE
 from lib.core.settings import LOWER_RATIO_BOUND
 from lib.core.settings import UPPER_RATIO_BOUND
+from lib.core.threads import getCurrentThreadData
 
 def comparison(page, getSeqMatcher=False, pageLength=None):
     if page is None and pageLength is None:
         return None
 
     regExpResults = None
-    conf.seqMatcher.set_seq1(kb.pageTemplate)
+
+    seqMatcher = getCurrentThreadData().seqMatcher
+    seqMatcher.set_seq1(kb.pageTemplate)
 
     if page:
         # String to be excluded before calculating page hash
@@ -66,28 +69,22 @@ def comparison(page, getSeqMatcher=False, pageLength=None):
         # Dynamic content lines to be excluded before comparison
         if not kb.nullConnection:
             page = removeDynamicContent(page)
-            conf.seqMatcher.set_seq1(removeDynamicContent(kb.pageTemplate))
+            seqMatcher.set_seq1(removeDynamicContent(kb.pageTemplate))
 
         if not pageLength:
             pageLength = len(page)
 
-    if kb.locks.seqLock:
-        kb.locks.seqLock.acquire()
-
     if conf.textOnly:
-        (conf.seqMatcher.a, page) = map(getFilteredPageContent, (conf.seqMatcher.a, page))
+        (seqMatcher.a, page) = map(getFilteredPageContent, (seqMatcher.a, page))
 
     if not conf.eRegexp and not conf.eString and kb.nullConnection and pageLength:
-        ratio = 1. * pageLength / len(conf.seqMatcher.a)
+        ratio = 1. * pageLength / len(seqMatcher.a)
 
         if ratio > 1.:
             ratio = 1. / ratio
     else:
-        conf.seqMatcher.set_seq2(page)
+        seqMatcher.set_seq2(page)
-        ratio = round(conf.seqMatcher.quick_ratio(), 3)
+        ratio = round(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

lib/techniques/blind/inference.py

@@ -257,7 +257,6 @@ def bisection(payload, expression, length=None, charsetType=None, firstChar=None
         idxlock = threading.Lock()
         iolock  = threading.Lock()
         valuelock  = threading.Lock()
-        kb.locks.seqLock = threading.Lock()
         kb.threadContinue = True
 
         def downloadThread():
@@ -404,8 +403,6 @@ def bisection(payload, expression, length=None, charsetType=None, firstChar=None
         if conf.verbose in (1, 2) and not showEta and infoMsg:
             dataToStdout(infoMsg)
 
-        kb.locks.seqLock = None
-
     # No multi-threading (--threads = 1)
     else:
         index = firstChar

lib/techniques/brute/use.py

@@ -54,7 +54,6 @@ def tableExists(tableFile, regex=None):
     threads = []
     tbllock = threading.Lock()
     iolock = threading.Lock()
-    kb.locks.seqLock = threading.Lock()
     kb.threadContinue = True
     kb.suppressSession = True
 
@@ -130,7 +129,6 @@ def tableExists(tableFile, regex=None):
         except KeyboardInterrupt:
             raise sqlmapThreadException, "user aborted"
     finally:
-        kb.locks.seqLock = None
         kb.threadContinue = True
         kb.threadException = False
         kb.suppressSession = False
@@ -172,7 +170,6 @@ def columnExists(columnFile, regex=None):
     threads = []
     collock = threading.Lock()
     iolock = threading.Lock()
-    kb.locks.seqLock = threading.Lock()
     kb.threadContinue = True
     kb.suppressSession = True
 
@@ -239,7 +236,6 @@ def columnExists(columnFile, regex=None):
         except KeyboardInterrupt:
             raise sqlmapThreadException, "user aborted"
     finally:
-        kb.locks.seqLock = None
         kb.threadContinue = True
         kb.threadException = False
         kb.suppressSession = False