read mylogin.cnf

read_mylogin.py

import struct
from Crypto.Cipher import AES

LOGIN_KEY_LEN = 20
MY_LOGIN_HEADER_LEN = 24
MAX_CIPHER_STORE_LEN = 4

f = open(".mylogin.cnf", "rb")
f.seek(4)
b = f.read(LOGIN_KEY_LEN)
key = [0] * 16
for i in range(LOGIN_KEY_LEN):
    key[i % 16] ^= b[i]
key = struct.pack('16B', *key)
encryptor = AES.new(key, AES.MODE_ECB)

f.seek(MY_LOGIN_HEADER_LEN)
while True:
    b = f.read(MAX_CIPHER_STORE_LEN)
    if len(b) < MAX_CIPHER_STORE_LEN:
        break
    cipher_len, = struct.unpack("<i", b)
    b = f.read(cipher_len)
    plain = encryptor.decrypt(b)
    print(plain[:-plain[-1]])
f.close()