| 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('level4.flag.txt.enc', 'rb').read() | |
| correct_pw_hash = open('level4.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_4_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_4_pw_check() | |
| # The strings below are 100 possibilities for the correct password. | |
| # (Only 1 is correct) | |
| pos_pw_list = ["8c86", "7692", "a519", "3e61", "7dd6", "8919", "aaea", "f34b", "d9a2", "39f7", "626b", "dc78", "2a98", "7a85", "cd15", "80fa", "8571", "2f8a", "2ca6", "7e6b", "9c52", "7423", "a42c", "7da0", "95ab", "7de8", "6537", "ba1e", "4fd4", "20a0", "8a28", "2801", "2c9a", "4eb1", "22a5", "c07b", "1f39", "72bd", "97e9", "affc", "4e41", "d039", "5d30", "d13f", "c264", "c8be", "2221", "37ea", "ca5f", "fa6b", "5ada", "607a", "e469", "5681", "e0a4", "60aa", "d8f8", "8f35", "9474", "be73", "ef80", "ea43", "9f9e", "77d7", "d766", "55a0", "dc2d", "a970", "df5d", "e747", "dc69", "cc89", "e59a", "4f68", "14ff", "7928", "36b9", "eac6", "5c87", "da48", "5c1d", "9f63", "8b30", "5534", "2434", "4a82", "d72c", "9b6b", "73c5", "1bcf", "c739", "6c31", "e138", "9e77", "ace1", "2ede", "32e0", "3694", "fc92", "a7e2"] | |