from Crypto.Cipher import DES


print("Enter key: ", end="")
key = input()
if len(key) != 8:
    key = key[:8] if len(key) > 8 else key + '#' * (8 - len(key) % 8)
    print("Your key is: ", key, "(must be 8 bytes long)")

print("Enter message: ", end="")
message = input()
message += ' ' * (8 - len(message) % 8)

des = DES.new(key, DES.MODE_ECB)
encrypted = des.encrypt(message)
decrypted = des.decrypt(encrypted).decode('ascii')

print('Encrypted message: ', encrypted)
print('Decrypted: ', decrypted)