# larsborn/tofsee_string_decrpyt.py

**[gist.github.com/larsborn/0ec24d7b294248c51de0c3335802cbd4](https://gist.github.com/larsborn/0ec24d7b294248c51de0c3335802cbd4)**

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as seen in 96baba74a907890b995f23c7db21568f7bfb5dbf417ed90ca311482b99702b72

#!/usr/bin/env python3

# -*- coding: utf-8 -*
import binascii

def decrypt(buf: bytes, key: int, summand: int) -> str:

ret = bytearray()

for i, c in enumerate(buf):

ret.append(c ^ key)

key += (-1 if i % 2 else 1) + summand

key &= 0xff

return ret.decode('utf-8').rstrip('\0')


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if __name__ == '__main__':

assert decrypt(binascii.unhexlify(b'8797286a6da3f032539eb4'), 0xe4, -0x38) ==
r'c:\Windows'

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