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49 lines
1.2 KiB
Python
49 lines
1.2 KiB
Python
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#!/usr/bin/env python
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"""
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$Id$
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Copyright (c) 2006-2011 sqlmap developers (http://sqlmap.sourceforge.net/)
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See the file 'doc/COPYING' for copying permission
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"""
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import string
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from lib.core.enums import PRIORITY
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__priority__ = PRIORITY.LOW
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def dependencies():
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pass
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def tamper(payload):
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"""
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Double url-encodes all characters in a given payload (not processing
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already encoded)
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Example:
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* Input: SELECT FIELD FROM%20TABLE
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* Output: %2553%2545%254c%2545%2543%2554%2520%2546%2549%2545%254c%2544%2520%2546%2552%254f%254d%2520%2554%2541%2542%254c%2545
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Notes:
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* Useful to bypass some weak web application firewalls that do not
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double url-decode the request before processing it through their
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ruleset
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"""
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retVal = payload
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if payload:
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retVal = ""
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i = 0
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while i < len(payload):
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if payload[i] == '%' and (i < len(payload) - 2) and payload[i+1] in string.hexdigits and payload[i+2] in string.hexdigits:
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retVal += payload[i:i+3]
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i += 3
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else:
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retVal += '%%25%X' % ord(payload[i])
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i += 1
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return retVal
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