def md5(fname): """ https://stackoverflow.com/a/3431838/4739690 md5 is percise enough for this use-case, this isn't crypto after all ;) """ hash_md5 = md5_() with open(fname, "rb") as f: for chunk in iter(lambda: f.read(4096), b""): hash_md5.update(chunk) return hash_md5.hexdigest()
#!/usr/bin/env python3
from re import match
from hashlib import md5 as md5_
from itertools import product
md5 = lambda x: md5_(x.encode()).hexdigest()
TABLE = "ABCDEFGHIJKLMNOPQRSTUVWXYZ{}"
ENCRYPT, DECRYPT = 1, -1
def vigenere(string, key, mode=ENCRYPT, table=TABLE):
L = len(key)
key = [ table.index(i) for i in key ]
string = [ table.index(i) for i in string ]
cipher = [ (v + mode * key[i % L]) % len(table) for i, v in enumerate(string) ]
return ''.join(table[i] for i in cipher)
key = ".......?????"
plaintext = "SECCON{...................................}"
ciphertext = "LMIG}RPEDOEEWKJIQIWKJWMNDTSR}TFVUFWYOCBAJBQ"
md5_hash = "f528a6ab914c1ecf856a1d93103948fe"
known_key = ''
for idx, char in enumerate('SECCON{'):
for k in TABLE:
if vigenere(char, k) == ciphertext[idx]:
known_key += k
break
print('known_key = %s' % known_key)
def md5(byte):
return md5_(byte).hexdigest().upper()
def md5(text: str) -> str:
m = md5_()
m.update(text.encode())
return m.hexdigest()