sqlmap/plugins/dbms/firebird/syntax.py

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#!/usr/bin/env python
"""
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Copyright (c) 2006-2012 sqlmap developers (http://www.sqlmap.org/)
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See the file 'doc/COPYING' for copying permission
"""
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from lib.core.common import isDBMSVersionAtLeast
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):
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if isDBMSVersionAtLeast('2.1'):
if quote:
while True:
index = expression.find("'")
if index == -1:
break
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firstIndex = index + 1
index = expression[firstIndex:].find("'")
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if index == -1:
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raise sqlmapSyntaxException, "Unenclosed ' in '%s'" % expression
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lastIndex = firstIndex + index
old = "'%s'" % expression[firstIndex:lastIndex]
unescaped = ""
for i in xrange(firstIndex, lastIndex):
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unescaped += "ASCII_CHAR(%d)" % (ord(expression[i]))
if i < lastIndex - 1:
unescaped += "||"
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expression = expression.replace(old, unescaped)
else:
unescaped = "".join("ASCII_CHAR(%d)||" % ord(c) for c in expression)
if unescaped[-1] == "||":
unescaped = unescaped[:-1]
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expression = unescaped
return expression
@staticmethod
def escape(expression):
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while True:
index = expression.find("ASCII_CHAR(")
if index == -1:
break
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firstIndex = index
index = expression[firstIndex:].find(")")
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if index == -1:
raise sqlmapSyntaxException, "Unenclosed ) in '%s'" % expression
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lastIndex = firstIndex + index + 1
old = expression[firstIndex:lastIndex]
oldUpper = old.upper()
oldUpper = oldUpper.lstrip("ASCII_CHAR(").rstrip(")")
oldUpper = oldUpper.split("||")
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escaped = "'%s'" % "".join(chr(int(char)) for char in oldUpper)
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expression = expression.replace(old, escaped).replace("'||'", "")
return expression