Hackergame 2022 writeup code

convert_hei.py

def convert(line: str) -> list[str]:
    result = []
    right_val = line.split("=")[1].replace(" ", "")
    list_indexs = line[line.find("[") + 1: line.find("]")]
    list_indexs = [i.replace(" ", "") for i in list_indexs.split("|")]
    for index in list_indexs:
        result.append(f"a[{index}] = {right_val}")

    return result


with open("./getflag.hei.py", "r") as f:
    result = []
    for line in f:
        if line.startswith("a["):
            result = result + convert(line)
        else:
            result.append(line)

    with open("./getflag.py", "w") as new_f:
        new_f.writelines(result)

hack_Xcaptcha.py

import requests
from lxml import etree

cookies = {
    "session": ""
}
SESS = requests.session()


def calc(content: str) -> str:
    content = content.split(" ")[0]
    return str(eval(content))


def crack():
    r = SESS.get("http://202.38.93.111:10047/xcaptcha", cookies=cookies)
    tree = etree.HTML(r.text)
    calc_list = tree.xpath("//div/label/text()")
    data = {}

    for index, content in enumerate(calc_list):
        data[f"captcha{index+1}"] = calc(content)

    r = SESS.post("http://202.38.93.111:10047/xcaptcha", data=data)
    print(r.text)


crack()