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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
import re
from lib.core.common import singleTimeWarnMessage
from lib.core.enums import DBMS
from lib.core.enums import PRIORITY
__priority__ = PRIORITY.HIGHEST
def dependencies():
singleTimeWarnMessage("tamper script '%s' is only meant to be run against %s" % (os.path.basename(__file__).split(".")[0], DBMS.ORACLE))
def tamper(payload, **kwargs):
"""
Replaces instances of <int> UNION with <int>DUNION
Requirement:
* Oracle
Notes:
* Reference: https://media.blackhat.com/us-13/US-13-Salgado-SQLi-Optimization-and-Obfuscation-Techniques-Slides.pdf
>>> tamper('1 UNION ALL SELECT')
'1DUNION ALL SELECT'
"""
return re.sub(r"(?i)(\d+)\s+(UNION )", r"\g<1>D\g<2>", payload) if payload else payload
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