#!/usr/bin/env python """ Copyright (c) 2006-2018 sqlmap developers (http://sqlmap.org/) See the file 'LICENSE' for copying permission """ import string from lib.core.enums import PRIORITY __priority__ = PRIORITY.NORMAL def tamper(payload, **kwargs): """ Unicode-escapes non-encoded characters in a given payload (not processing already encoded) (e.g. SELECT -> \u0053\u0045\u004C\u0045\u0043\u0054) Notes: * Useful to bypass weak filtering and/or WAFs in JSON contexes >>> tamper('SELECT FIELD FROM TABLE') '\\\\u0053\\\\u0045\\\\u004C\\\\u0045\\\\u0043\\\\u0054\\\\u0020\\\\u0046\\\\u0049\\\\u0045\\\\u004C\\\\u0044\\\\u0020\\\\u0046\\\\u0052\\\\u004F\\\\u004D\\\\u0020\\\\u0054\\\\u0041\\\\u0042\\\\u004C\\\\u0045' """ retVal = payload if payload: retVal = "" i = 0 while i < len(payload): if payload[i] == '%' and (i < len(payload) - 2) and payload[i + 1:i + 2] in string.hexdigits and payload[i + 2:i + 3] in string.hexdigits: retVal += "\\u00%s" % payload[i + 1:i + 3] i += 3 else: retVal += '\\u%.4X' % ord(payload[i]) i += 1 return retVal