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#!/usr/bin/env python
"""
Copyright (c) 2006-2025 sqlmap developers (https://sqlmap.org)
See the file 'LICENSE' for copying permission
"""
import os
from lib.core.common import singleTimeWarnMessage
from lib.core.enums import DBMS
from lib.core.enums import PRIORITY
__priority__ = PRIORITY.LOWEST
def dependencies():
singleTimeWarnMessage("tamper script '%s' is only meant to be run against %s" % (os.path.basename(__file__).split(".")[0], DBMS.ACCESS))
def tamper(payload, **kwargs):
"""
Appends an (Access) NULL byte character (%00) at the end of payload
Requirement:
* Microsoft Access
Notes:
* Useful to bypass weak web application firewalls when the back-end
database management system is Microsoft Access - further uses are
also possible
Reference: http://projects.webappsec.org/w/page/13246949/Null-Byte-Injection
>>> tamper('1 AND 1=1')
'1 AND 1=1%00'
"""
return "%s%%00" % payload if payload else payload
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