sqlmap/plugins/dbms/firebird/syntax.py

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#!/usr/bin/env python
"""
$Id$
This file is part of the sqlmap project, http://sqlmap.sourceforge.net.
Copyright (c) 2007-2010 Bernardo Damele A. G. <bernardo.damele@gmail.com>
Copyright (c) 2006 Daniele Bellucci <daniele.bellucci@gmail.com>
sqlmap 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.
sqlmap 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 sqlmap; if not, write to the Free Software Foundation, Inc., 51
Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
"""
from lib.core.exception import sqlmapSyntaxException
from plugins.generic.syntax import Syntax as GenericSyntax
class Syntax(GenericSyntax):
def __init__(self):
GenericSyntax.__init__(self)
@staticmethod
def unescape(expression, quote=True):
if quote:
while True:
index = expression.find("'")
if index == -1:
break
firstIndex = index + 1
index = expression[firstIndex:].find("'")
if index == -1:
raise sqlmapSyntaxException, "Unenclosed ' in '%s'" % expression
lastIndex = firstIndex + index
old = "'%s'" % expression[firstIndex:lastIndex]
unescaped = ""
for i in range(firstIndex, lastIndex):
unescaped += "ASCII_CHAR(%d)" % (ord(expression[i]))
if i < lastIndex - 1:
unescaped += "||"
expression = expression.replace(old, unescaped)
else:
unescaped = "".join("ASCII_CHAR(%d)||" % ord(c) for c in expression)
if unescaped[-1] == "||":
unescaped = unescaped[:-1]
expression = unescaped
return expression
@staticmethod
def escape(expression):
while True:
index = expression.find("ASCII_CHAR(")
if index == -1:
break
firstIndex = index
index = expression[firstIndex:].find(")")
if index == -1:
raise sqlmapSyntaxException, "Unenclosed ) in '%s'" % expression
lastIndex = firstIndex + index + 1
old = expression[firstIndex:lastIndex]
oldUpper = old.upper()
oldUpper = oldUpper.lstrip("ASCII_CHAR(").rstrip(")")
oldUpper = oldUpper.split("||")
escaped = "'%s'" % "".join([chr(int(char)) for char in oldUpper])
expression = expression.replace(old, escaped).replace("'||'", "")
return expression