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update writeup

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aaron
2021-12-04 05:20:50 +01:00
parent 1bad194a14
commit f5e3af5326
1 changed files with 2 additions and 2 deletions
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crypto/XMASSpirit/README.md
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@@ -43,11 +43,11 @@ def get_factors(ct:bytes, n:int=256) -> (int, int):
- When the factors are found, simply create a lookup table of all values and substitute each byte in the ciphertext. - When the factors are found, simply create a lookup table of all values and substitute each byte in the ciphertext.
```python ```python
def decrypt(ct:bytes) -> bytes: def decrypt(ct:bytes, lut:dict) -> bytes:
''' decrypt the file using the lookup table ''' ''' decrypt the file using the lookup table '''
res = b'' res = b''
for byte in ct: for byte in ct:
dec = lookup[byte] dec = lut[byte]
res += bytes([dec]) res += bytes([dec])
return res return res
``` ```