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49 lines
1.3 KiB
Python
49 lines
1.3 KiB
Python
#!/usr/bin/env python
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"""
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Copyright (c) 2006-2020 sqlmap developers (http://sqlmap.org/)
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See the file 'LICENSE' for copying permission
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"""
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import re
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from lib.core.common import singleTimeWarnMessage
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from lib.core.convert import decodeHex
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from lib.core.convert import getOrds
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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.NORMAL
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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.MYSQL))
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def tamper(payload, **kwargs):
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"""
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Replaces each (MySQL) 0x<hex> encoded string with equivalent CONCAT(CHAR(),...) counterpart
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Requirement:
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* MySQL
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Tested against:
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* MySQL 4, 5.0 and 5.5
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Notes:
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* Useful in cases when web application does the upper casing
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>>> tamper('SELECT 0xdeadbeef')
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'SELECT CONCAT(CHAR(222),CHAR(173),CHAR(190),CHAR(239))'
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"""
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retVal = payload
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if payload:
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for match in re.finditer(r"\b0x([0-9a-f]+)\b", retVal):
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if len(match.group(1)) > 2:
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result = "CONCAT(%s)" % ','.join("CHAR(%d)" % _ for _ in getOrds(decodeHex(match.group(1))))
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else:
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result = "CHAR(%d)" % ord(decodeHex(match.group(1)))
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retVal = retVal.replace(match.group(0), result)
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return retVal
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