2023 年全国工业和信息化技术技能大赛（工业互联网安全福建省选拔赛）暨福建省第三届工业互联网创新大赛初赛部分Writeup

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hon/mqttMndZQUFHUmhkR0V20.../python/mqttWWpjNVpERTVNREF00.../python/mqttWkRjMk1pMDBZbVkz0.../python/mqttTFdGbU1qQXRObUky0.../python/mqttWlRBek16ZzVNMlU00.../python/mqttClZWUUZBQU1HL2dK0.../python/mqtta2RYZ0xBQUVFOVFF0.../python/mqttQUFBUVVBQUFBVUVz0.../python/mqttRkJnQUFBQUFFQUFR0.../python/mqttQWRRRUFBUGtJQUFB0.../python/mqttQUFBPT0K"f=open("MQTT.txt","w") s=s.replace("0.../python/mqtt","") print(s)

from PIL import Image, ImageOpsimport randomimg = Image.open("./final.png").convert("L")W, H = img.sizeimg_pixels = img.load()res = []for i in range(W * H):    res.append((i))random.seed(114514)random.shuffle(res)a = [0 for i in range(W * H)]for i in range(len(a)):    j = res.index(i)    a[i] = img_pixels[j % 200, j // 200]inm = Image.new(img.mode, img.size)inm_pixels = inm.load()for i in range(W * H):    inm_pixels[i % 200, i // 200] = a[i]# inm.show()ImageOps.flip(inm).rotate(-90, expand=True).show()

import os, randomfrom PIL import Image, ImageDraw, ImageFont# Loading FLAG from environment variables# flag = str(os.environ.get('FLAG'))# Load from /flagflag = open('/flag').read().strip()flag = flag[:13] + "n" + flag[13:26] + "n" + flag[26:37] + "n" + flag[37:]seed = 114514res = []W, H = 200, 200for i in range(W * H):    res.append((i))random.seed(seed)random.shuffle(res)a = [0 for i in range(W * H)]# Drawingbackground_color = (255, 255, 255)image = Image.new("RGB", (W, H), background_color)img = ImageDraw.Draw(image)text_color = (0, 0, 0)text_width, text_height = img.textsize(flag)x = (W - text_width) / 2y = (H - text_height) / 2font = ImageFont.truetype(font="consola.ttf", size=15)img.text((x, y), flag, fill=text_color, font=font)image_pixels = image.load()image = Image.new(image.mode, image.size)inm_pixels = image.load()for i in range(W * H):    inx = res.index(i)    x, y = inx % W, inx // W    inm_pixels[x, y] = image_pixels[i % W, i // W]image.show()image.save("flag.png")