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43 lines
1.2 KiB
Python
43 lines
1.2 KiB
Python
#!/usr/bin/env python
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"""
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Copyright (c) 2006-2020 sqlmap developers (http://sqlmap.org/)
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See the file 'LICENSE' 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, **kwargs):
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"""
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Double URL-encodes all characters in a given payload (not processing already encoded) (e.g. SELECT -> %2553%2545%254C%2545%2543%2554)
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Notes:
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* Useful to bypass some weak web application firewalls that do not double URL-decode the request before processing it through their ruleset
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>>> tamper('SELECT FIELD FROM%20TABLE')
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'%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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"""
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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:i + 2] in string.hexdigits and payload[i + 2:i + 3] in string.hexdigits:
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retVal += '%%25%s' % payload[i + 1:i + 3]
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i += 3
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else:
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retVal += '%%25%.2X' % ord(payload[i])
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i += 1
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return retVal
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