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46 lines
1.5 KiB
Python
46 lines
1.5 KiB
Python
#!/usr/bin/env python
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"""
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Copyright (c) 2006-2026 sqlmap developers (https://sqlmap.org)
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See the file 'LICENSE' for copying permission
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"""
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import string
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from lib.core.enums import PRIORITY
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__priority__ = PRIORITY.LOWEST
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def tamper(payload, **kwargs):
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"""
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Unicode-escapes non-encoded characters in a given payload (not processing already encoded) (e.g. SELECT -> \u0053\u0045\u004C\u0045\u0043\u0054)
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Notes:
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* Useful to bypass weak filtering and/or WAFs in JSON contexes
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>>> tamper('SELECT FIELD FROM TABLE')
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'\\\\u0053\\\\u0045\\\\u004C\\\\u0045\\\\u0043\\\\u0054\\\\u0020\\\\u0046\\\\u0049\\\\u0045\\\\u004C\\\\u0044\\\\u0020\\\\u0046\\\\u0052\\\\u004F\\\\u004D\\\\u0020\\\\u0054\\\\u0041\\\\u0042\\\\u004C\\\\u0045'
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"""
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retVal = payload
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if payload:
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retVal = ""
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i = 0
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while i < len(payload):
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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:
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retVal += "\\u00%s" % payload[i + 1:i + 3]
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i += 3
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else:
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ordinal = ord(payload[i])
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if ordinal > 0xFFFF:
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# non-BMP: emit a UTF-16 surrogate pair (a bare 5-hex '\uXXXXX' is invalid)
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ordinal -= 0x10000
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retVal += "\\u%04X\\u%04X" % (0xD800 + (ordinal >> 10), 0xDC00 + (ordinal & 0x3FF))
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else:
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retVal += "\\u%04X" % ordinal
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i += 1
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return retVal
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