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74 lines
2.1 KiB
Python
74 lines
2.1 KiB
Python
#!/usr/bin/env python
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"""
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$Id$
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Copyright (c) 2006-2011 sqlmap developers (http://www.sqlmap.org/)
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See the file 'doc/COPYING' for copying permission
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"""
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from lib.core.exception import sqlmapSyntaxException
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from plugins.generic.syntax import Syntax as GenericSyntax
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class Syntax(GenericSyntax):
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def __init__(self):
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GenericSyntax.__init__(self)
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@staticmethod
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def unescape(expression, quote=True):
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if quote:
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while True:
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index = expression.find("'")
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if index == -1:
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break
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firstIndex = index + 1
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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
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old = "'%s'" % expression[firstIndex:lastIndex]
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unescaped = ""
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for i in range(firstIndex, lastIndex):
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unescaped += "CHR(%d)" % (ord(expression[i]))
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if i < lastIndex - 1:
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unescaped += "&"
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expression = expression.replace(old, unescaped)
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else:
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unescaped = "".join("CHR(%d)&" % ord(c) for c in expression)
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if unescaped[-1] == "&":
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unescaped = unescaped[:-1]
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expression = unescaped
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return expression
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@staticmethod
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def escape(expression):
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while True:
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index = expression.find("CHR(")
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if index == -1:
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break
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firstIndex = index
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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 + 1
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old = expression[firstIndex:lastIndex]
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oldUpper = old.upper()
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oldUpper = oldUpper.lstrip("CHR(").rstrip(")")
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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("'&'", "")
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return expression
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