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44 lines
1.2 KiB
Python
44 lines
1.2 KiB
Python
#!/usr/bin/env python
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"""
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Copyright (c) 2006-2026 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 re
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from lib.core.common import singleTimeWarnMessage
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from lib.core.enums import DBMS
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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 %s" % (os.path.basename(__file__).split(".")[0], DBMS.PGSQL))
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def tamper(payload, **kwargs):
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"""
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Replaces single-quoted strings with PostgreSQL dollar-quoted strings (e.g. 'abc' -> $$abc$$)
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Requirement:
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* PostgreSQL
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Tested against:
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* PostgreSQL 9.x, 10-16
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Notes:
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* Useful to bypass filters that block, strip or escape the single-quote
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character: dollar-quoting is quote-free and needs no escaping
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* A literal already containing '$$' is left untouched
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>>> tamper("SELECT 'abc' FROM t WHERE x='def'")
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'SELECT $$abc$$ FROM t WHERE x=$$def$$'
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"""
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retVal = payload
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if payload:
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retVal = re.sub(r"'([^']*)'", lambda match: "$$%s$$" % match.group(1) if "$$" not in match.group(1) else match.group(0), payload)
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return retVal
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