sqlmap/tamper/percentage.py

55 lines
1.4 KiB
Python

#!/usr/bin/env python
"""
Copyright (c) 2006-2013 sqlmap developers (http://sqlmap.org/)
See the file 'doc/COPYING' for copying permission
"""
import os
import string
from lib.core.enums import PRIORITY
from lib.core.common import singleTimeWarnMessage
__priority__ = PRIORITY.LOW
def dependencies():
singleTimeWarnMessage("tamper script '%s' is only meant to be run against ASP web applications" % os.path.basename(__file__).split(".")[0])
def tamper(payload, **kwargs):
"""
Adds a percentage sign ('%') infront of each character
Example:
* Input: SELECT FIELD FROM TABLE
* Output: %S%E%L%E%C%T %F%I%E%L%D %F%R%O%M %T%A%B%L%E
Requirement:
* ASP
Tested against:
* Microsoft SQL Server 2000, 2005
* MySQL 5.1.56, 5.5.11
* PostgreSQL 9.0
Notes:
* Useful to bypass weak and bespoke web application firewalls
"""
if payload:
retVal = ""
i = 0
while i < len(payload):
if payload[i] == '%' and (i < len(payload) - 2) and payload[i + 1:i + 2] in string.hexdigits and payload[i + 2:i + 3] in string.hexdigits:
retVal += payload[i:i + 3]
i += 3
elif payload[i] != ' ':
retVal += '%%%s' % payload[i]
i += 1
else:
retVal += payload[i]
i += 1
return retVal