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#!/usr/bin/env python
"""
Copyright (c) 2006-2025 sqlmap developers (https://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
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