mirror of
https://github.com/The-Art-of-Hacking/h4cker.git
synced 2024-12-27 08:09:34 -05:00
46 lines
1.4 KiB
Python
46 lines
1.4 KiB
Python
|
from Crypto.Util.number import bytes_to_long, long_to_bytes
|
||
|
|
from Crypto.Cipher import AES
|
||
|
|
from Crypto.Util.Padding import pad
|
||
|
|
from secret import password, flag
|
||
|
|
from hashlib import sha256
|
||
|
|
|
||
|
|
NB_ITERATIONS = 10871177237854734092489348927
|
||
|
|
e = 65538
|
||
|
|
|
||
|
|
#Old N : N = 16725961734830292192130856503318846470372809633859943564170796604233648911148664645199314305393113642834320744397102098813353759076302959550707448148205851497665038807780166936471173111197092391395808381534728287101705
|
||
|
|
|
||
|
|
N = 14968794114523720195251887716913440457986979987674770429103169854116498198112478103466085455257317270930523061714030307370028304505577267672733143013124254253285088080041831478700041394909740024011681885623055622400205
|
||
|
|
|
||
|
|
|
||
|
|
def derive_key(password):
|
||
|
|
start = bytes_to_long(password)
|
||
|
|
|
||
|
|
#Making sure I am safe from offline bruteforce attack
|
||
|
|
|
||
|
|
for i in range(NB_ITERATIONS):
|
||
|
|
start = start ** e
|
||
|
|
start %= N
|
||
|
|
|
||
|
|
#We are never too cautious let's make it harder
|
||
|
|
|
||
|
|
key = 1
|
||
|
|
for i in range(NB_ITERATIONS):
|
||
|
|
key = key ** e
|
||
|
|
key %= N
|
||
|
|
key *= start
|
||
|
|
key %= N
|
||
|
|
|
||
|
|
return sha256(long_to_bytes(key)).digest()
|
||
|
|
|
||
|
|
|
||
|
|
assert(len(password) == 2)
|
||
|
|
assert(password.decode().isprintable())
|
||
|
|
|
||
|
|
key = derive_key(password)
|
||
|
|
IV = b"random_and_safe!"
|
||
|
|
cipher = AES.new(key, AES.MODE_CBC,IV)
|
||
|
|
enc = cipher.encrypt(pad(flag,16))
|
||
|
|
|
||
|
|
with open("flag.enc","wb") as output_file:
|
||
|
|
output_file.write(enc)
|