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60 lines
1.9 KiB
Python
60 lines
1.9 KiB
Python
#!/usr/bin/env python
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"""
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Copyright (c) 2006-2012 sqlmap developers (http://sqlmap.org/)
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See the file 'doc/COPYING' for copying permission
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"""
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import binascii
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import re
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from lib.core.convert import utf8encode
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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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unescaped = expression
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for item in re.findall(r"'[^']+'", expression, re.S):
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try:
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unescaped = unescaped.replace(item, "0x%s" % binascii.hexlify(item.strip("'")))
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except UnicodeEncodeError:
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unescaped = unescaped.replace(item, "CONVERT(0x%s USING utf8)" % "".join("%.2x" % ord(_) for _ in utf8encode(item.strip("'"))))
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else:
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unescaped = "0x%s" % binascii.hexlify(expression)
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return unescaped
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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("CHAR(")
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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("CHAR(").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)
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original = expression
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for item in re.findall(r"0x[0-9a-fA-F]+", original, re.S):
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expression = expression.replace(item, "'%s'" % binascii.unhexlify(item[2:]))
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return expression
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