| import hashlib | |
| ### THIS FUNCTION WILL NOT HELP YOU FIND THE FLAG --LT ######################## | |
| def str_xor(secret, key): | |
| #extend key to secret length | |
| new_key = key | |
| i = 0 | |
| while len(new_key) < len(secret): | |
| new_key = new_key + key[i] | |
| i = (i + 1) % len(key) | |
| return "".join([chr(ord(secret_c) ^ ord(new_key_c)) for (secret_c,new_key_c) in zip(secret,new_key)]) | |
| ############################################################################### | |
| flag_enc = open('level5.flag.txt.enc', 'rb').read() | |
| correct_pw_hash = open('level5.hash.bin', 'rb').read() | |
| def hash_pw(pw_str): | |
| pw_bytes = bytearray() | |
| pw_bytes.extend(pw_str.encode()) | |
| m = hashlib.md5() | |
| m.update(pw_bytes) | |
| return m.digest() | |
| def level_5_pw_check(): | |
| user_pw = input("Please enter correct password for flag: ") | |
| user_pw_hash = hash_pw(user_pw) | |
| if( user_pw_hash == correct_pw_hash ): | |
| print("Welcome back... your flag, user:") | |
| decryption = str_xor(flag_enc.decode(), user_pw) | |
| print(decryption) | |
| return | |
| print("That password is incorrect") | |
| level_5_pw_check() | |