Day10-14

Day 11/decode.py

@@ -0,0 +1,21 @@
+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)