Hackvent_2023/Day 11/decode.py

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2023-12-19 16:28:13 +01:00
from PIL import Image
import re
import textwrap
if __name__ == "__main__":
img = Image.open("challenge.png")
pix = img.load()
width, height = img.size
out = ""
for x in range(width):
for y in range(height):
out += chr(pix[x,y][0] ^ pix[x,y][2])
flag = re.search(r"HV23\{[^\}]*\}", out)[0]
print("[+] Flag:", flag)
bin_str = out.replace(flag, "").replace("Never gonna give you up. ", "0").replace("Never gonna let you down. ", "1")
bin_str = re.sub(r"[^01]", "", bin_str)
flag2 = "".join(chr(int(octet, 2)) for octet in textwrap.wrap(bin_str, 8))
flag2 = re.search(r"HV23\{[^\}]*\}", flag2)[0]
print("[+] Hidden Flag:", flag2)