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improvement of reflective mechanism

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This commit is contained in:
Miroslav Stampar 2012-04-11 08:58:03 +00:00
parent 60ca44e0cf
commit 2e92d8636e
1 changed files with 27 additions and 24 deletions
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9
lib/core/common.py
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@ -2645,17 +2645,20 @@ def removeReflectiveValues(content, payload, suppressWarning=False):
payload = getUnicode(urldecode(payload.replace(PAYLOAD_DELIMITER, '')))
regex = _(filterStringValue(payload, r'[A-Za-z0-9]', REFLECTED_REPLACEMENT_REGEX.encode("string-escape")))
if all(part.lower() in content.lower() for part in regex.split(REFLECTED_REPLACEMENT_REGEX)): # fast optimization check
if regex != payload:
regex = re.sub(r"\A([A-Za-z0-9]+)", r"(\1)?", regex)
if all(part.lower() in content.lower() or part.endswith(')?') for part in regex.split(REFLECTED_REPLACEMENT_REGEX)): # fast optimization check
parts = regex.split(REFLECTED_REPLACEMENT_REGEX)
if len(parts) > REFLECTED_MAX_REGEX_PARTS: # preventing CPU hogs
regex = _("%s%s%s" % (REFLECTED_REPLACEMENT_REGEX.join(parts[:REFLECTED_MAX_REGEX_PARTS / 2]), REFLECTED_REPLACEMENT_REGEX, REFLECTED_REPLACEMENT_REGEX.join(parts[-REFLECTED_MAX_REGEX_PARTS / 2:])))
if regex.lstrip(REFLECTED_REPLACEMENT_REGEX) != regex:
if regex.startswith(REFLECTED_REPLACEMENT_REGEX):
regex = r"%s%s" % (REFLECTED_BORDER_REGEX, regex.lstrip(REFLECTED_REPLACEMENT_REGEX))
else:
regex = r"\b%s" % regex
if regex.rstrip(REFLECTED_REPLACEMENT_REGEX) != regex:
if regex.endswith(REFLECTED_REPLACEMENT_REGEX):
regex = r"%s%s" % (regex.rstrip(REFLECTED_REPLACEMENT_REGEX), REFLECTED_BORDER_REGEX)
else:
regex = r"%s\b" % regex