[MRCTF2020]千层套路

发布时间 2023-11-17 11:22:01作者: 跳河离去的鱼

压缩包需要密码,暴力破解得知为0573

LTTzCmz1oBLItd7PNb4OG2Y-2lF9DyaQXJvm7Dyfcb8

发现里面压缩包的密码也是文件名0114

00zMxM4I_dWd93yZlshxt4B52X15adCQ6v0DFfoVVAg

估计是套娃题,拿脚本解压

import zipfile
name = '0573'
while True:
    fz = zipfile.ZipFile(name + '.zip', 'r')
    fz.extractall(pwd=bytes(name, 'utf-8'))
    name = fz.filelist[0].filename[0:4]
    fz.close()

解压出来六百多个压缩包,得到qr.txt,qr.txt内容是RGB数据,整理成如下格式

mlakxYgL91S6V4ryzNumIa97yOeAEaGQyrEQ0ifjxjo

使用脚本将RGB数据写成图片

import itertools
from PIL import Image


max = 200
file = open("qr.txt", "r")

img = Image.new("RGB", (max, max))
for y, x in itertools.product(range(max), range(max)):
    pixel = eval(file.readline())
    img.putpixel([x, y], pixel)

img.show()

-qmF81Xy2kV7H5xN-WlEh4CDs52lVjDUVVr7-X4S7gk

sCGrtc6GGsnQ4pIdQSPEVJu6B8NtlukRdoeM62iS27Y

flag{ta01uyout1nreet1n0usandtimes}