sqlmap/tamper/charencode.py

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#!/usr/bin/env python
"""
$Id$
Copyright (c) 2006-2010 sqlmap developers (http://sqlmap.sourceforge.net/)
See the file 'doc/COPYING' for copying permission
"""
import string
from lib.core.enums import PRIORITY
from lib.core.exception import sqlmapUnsupportedFeatureException
__priority__ = PRIORITY.LOWEST
def tamper(value):
"""
Replaces value with urlencode of non-encoded chars in value
Example: 'SELECT%20FIELD%20FROM%20TABLE' becomes '%53%45%4c%45%43%54%20%46%49%45%4c%44%20%46%52%4f%4d%20%54%41%42%4c%45'
"""
retVal = value
if value:
retVal = ""
i = 0
while i < len(value):
if value[i] == '%' and (i < len(value) - 2) and value[i+1] in string.hexdigits and value[i+2] in string.hexdigits:
retVal += value[i:i+3]
i += 3
else:
retVal += '%%%X' % ord(value[i])
i += 1
return retVal