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54 lines
1.4 KiB
Python
54 lines
1.4 KiB
Python
#!/usr/bin/env python
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"""
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Copyright (c) 2006-2022 sqlmap developers (https://sqlmap.org/)
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See the file 'LICENSE' for copying permission
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"""
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import os
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import string
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from lib.core.common import singleTimeWarnMessage
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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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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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"""
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Adds a percentage sign ('%') infront of each character (e.g. SELECT -> %S%E%L%E%C%T)
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Requirement:
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* ASP
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Tested against:
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* Microsoft SQL Server 2000, 2005
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* MySQL 5.1.56, 5.5.11
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* PostgreSQL 9.0
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Notes:
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* Useful to bypass weak and bespoke web application firewalls
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>>> tamper('SELECT FIELD FROM TABLE')
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'%S%E%L%E%C%T %F%I%E%L%D %F%R%O%M %T%A%B%L%E'
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"""
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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 += payload[i:i + 3]
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i += 3
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elif payload[i] != ' ':
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retVal += '%%%s' % payload[i]
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i += 1
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else:
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retVal += payload[i]
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i += 1
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return retVal
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