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68 lines
1.6 KiB
Python
68 lines
1.6 KiB
Python
#!/usr/bin/env python
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"""
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Copyright (c) 2006-2014 sqlmap developers (http://sqlmap.org/)
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See the file 'doc/COPYING' for copying permission
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"""
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import random
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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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pass
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def tamper(payload, **kwargs):
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"""
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Replaces space character (' ') with a random blank character from a
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valid set of alternate characters
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Tested against:
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* Microsoft SQL Server 2005
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* MySQL 4, 5.0 and 5.5
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* Oracle 10g
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* PostgreSQL 8.3, 8.4, 9.0
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Notes:
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* Useful to bypass several web application firewalls
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>>> random.seed(0)
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>>> tamper('SELECT id FROM users')
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'SELECT%0Did%0DFROM%0Ausers'
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"""
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# ASCII table:
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# TAB 09 horizontal TAB
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# LF 0A new line
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# FF 0C new page
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# CR 0D carriage return
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blanks = ("%09", "%0A", "%0C", "%0D")
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retVal = payload
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if payload:
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retVal = ""
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quote, doublequote, firstspace = False, False, False
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for i in xrange(len(payload)):
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if not firstspace:
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if payload[i].isspace():
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firstspace = True
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retVal += random.choice(blanks)
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continue
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elif payload[i] == '\'':
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quote = not quote
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elif payload[i] == '"':
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doublequote = not doublequote
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elif payload[i] == ' ' and not doublequote and not quote:
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retVal += random.choice(blanks)
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continue
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retVal += payload[i]
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return retVal
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