XorXorXor — Hack The Box Crypto Challenge — Writeup| 2023

XorXorXor — Hack The Box Crypto Challenge — Writeup| 2023

Hack The Box — XorXorXor Crypto Challenge Writeup | Karthikeyan Nagaraj

Description:

Who needs AES when you have XOR?

Task Files:

Task Files Can be Downloaded Here

File Contents:

challenge.py

#!/usr/bin/python3
import os
flag = open('flag.txt', 'r').read().strip().encode()

class XOR:
    def __init__(self):
        self.key = os.urandom(4)
    def encrypt(self, data: bytes) -> bytes:
        xored = b''
        for i in range(len(data)):
            xored += bytes([data[i] ^ self.key[i % len(self.key)]])
        return xored
    def decrypt(self, data: bytes) …

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