Description
Benoît Blanc thinks he’s managed to hide his AES key in some tables.
He provides you with the code written in C to use them, for example:
$ make
$ ./wb-aes keys.bin < /dev/zero
f34789150f962bdcc56e8c585451f34d
He encrypted the flag using the SHA256 of this key (see output.txt):
def encrypt(k, flag):
import hashlib
from Crypto.Cipher import AES
hk = hashlib.sha256(k).digest()
E = AES.new(hk, AES.MODE_GCM)
iv = E.nonce
c = E.encrypt(flag)
return {"c": c.hex(), "iv": iv.hex()}
Files
-
connaitre-ses-tables-easy.tar.xz
8.38 KiB – 144764f4209460294244fc36cf68b24d288f7316ad7edc4421128cf80e56a10d
Author
Neige
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