/usr/share/w3af/plugins/evasion/rndHexEncode.py is in w3af-console 1.1svn5547-1.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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rndHexEncode.py
Copyright 2006 Andres Riancho
This file is part of w3af, w3af.sourceforge.net .
w3af is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation version 2 of the License.
w3af is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with w3af; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
'''
from core.controllers.basePlugin.baseEvasionPlugin import baseEvasionPlugin
from core.controllers.w3afException import w3afException
from core.data.parsers.urlParser import parse_qs
from core.data.url.HTTPRequest import HTTPRequest as HTTPRequest
# options
from core.data.options.option import option
from core.data.options.optionList import optionList
from random import randint
class rndHexEncode(baseEvasionPlugin):
'''
Add random hex encoding.
@author: Andres Riancho ( andres.riancho@gmail.com )
'''
def __init__(self):
baseEvasionPlugin.__init__(self)
def modifyRequest(self, request ):
'''
Mangles the request
@parameter request: HTTPRequest instance that is going to be modified by the evasion plugin
@return: The modified request
>>> from core.data.parsers.urlParser import url_object
>>> rhe = rndHexEncode()
>>> u = url_object('http://www.w3af.com/')
>>> r = HTTPRequest( u )
>>> rhe.modifyRequest( r ).url_object.url_string
u'http://www.w3af.com/'
>>> u = url_object('http://www.w3af.com/a/')
>>> r = HTTPRequest( u )
>>> rhe.modifyRequest( r ).url_object.getPath() in ['/a/','/%61/']
True
>>> u = url_object('http://www.w3af.com/')
>>> r = HTTPRequest( u, data='a=b' )
>>> rhe.modifyRequest( r ).get_data() in ['a=b','%61=b','a=%62','%61=%62']
True
>>> u = url_object('http://www.w3af.com/aa/')
>>> r = HTTPRequest( u )
>>> rhe.modifyRequest( r ).url_object.getPath() in ['/aa/','/%61a/','/a%61/','/%61%61/']
True
>>> #
>>> # The plugins should not modify the original request
>>> #
>>> u.url_string
u'http://www.w3af.com/aa/'
'''
# First we mangle the URL
path = request.url_object.getPath()
path = self._mutate(path)
# Finally, we set all the mutants to the request in order to return it
new_url = request.url_object.copy()
new_url.setPath( path )
# Mangle the postdata
data = request.get_data()
if data:
try:
# Only mangle the postdata if it is a url encoded string
parse_qs( data )
except:
pass
else:
data = self._mutate(data)
new_req = HTTPRequest( new_url , data, request.headers,
request.get_origin_req_host() )
return new_req
def _mutate( self, data ):
'''
Replace some strings by it's hex encoded value.
@return: a string.
'''
new_data = ''
for char in data:
if char not in ['?', '/', '&', '\\', '=', '%', '+']:
if randint(1, 2) == 2:
char = "%%%02x" % ord(char)
new_data += char
return new_data
def getOptions( self ):
'''
@return: A list of option objects for this plugin.
'''
ol = optionList()
return ol
def setOptions( self, OptionList ):
'''
This method sets all the options that are configured using the user interface
generated by the framework using the result of getOptions().
@parameter OptionList: A dictionary with the options for the plugin.
@return: No value is returned.
'''
pass
def getPluginDeps( self ):
'''
@return: A list with the names of the plugins that should be run before the
current one.
'''
return []
def getPriority( self ):
'''
This function is called when sorting evasion plugins.
Each evasion plugin should implement this.
@return: An integer specifying the priority. 0 is run first, 100 last.
'''
return 50
def getLongDesc( self ):
'''
@return: A DETAILED description of the plugin functions and features.
'''
return '''
This evasion plugin adds random hex encoding.
Example:
Input: '/bar/foo.asp'
Output : '/b%61r/%66oo.asp'
'''
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