Function queryOutputLength

lib/techniques/blind/inference.py:732–751

Returns the query output length.

(expression, payload)

    return getCounter(getTechnique()), safecharencode(_) if kb.safeCharEncode else _

def queryOutputLength(expression, payload):
    """
    Returns the query output length.
    """

    infoMsg = "retrieving the length of query output"
    logger.info(infoMsg)

    start = time.time()

    lengthExprUnescaped = agent.forgeQueryOutputLength(expression)
    count, length = bisection(payload, lengthExprUnescaped, charsetType=CHARSET_TYPE.DIGITS)

    debugMsg = "performed %d quer%s in %.2f seconds" % (count, 'y' if count == 1 else "ies", calculateDeltaSeconds(start))
    logger.debug(debugMsg)

    if isinstance(length, six.string_types) and length.isspace():
        length = 0

    return length