fr0g_kgm1 | crackmes.de

fr0g_kgm1.py

# http://crackmes.de/users/fr0gsek/fr0g_kgm1/

key = 'SeRiAlAbCdEfGhIjKlMnOpQrStUvWxYz'[::-1]

user = ''
while len(user) < 5:
        user = input('login [min 5 chars]: ')

serial = ''
for i in range(32):
        serial += chr(ord(key[i]) ^ ord(user[i - len(user) * (i//len(user))]))

print("Trying to write your serial to file '/var/tmp/thegame.serial' ...")

with open("/var/tmp/thegame.serial", "w") as out:
        out.write(serial[::-1])

print("Succcess! You can now use your login '" + user + "'")