laokoon

LaokoonHaxorcist/crypto_me_is_me/server.py

@@ -0,0 +1,42 @@
+from secret import FLAG
+from hashlib import sha256
+
+
+class hash():
+
+    def __init__(self, message):
+        self.message = message
+
+    def rotate(self, message):
+        return [((b >> 4) | (b << 3)) & 0xff for b in message]
+
+    def hexdigest(self):
+        rotated = self.rotate(self.message)
+        return sha256(bytes(rotated)).hexdigest()
+
+
+def main():
+    original_message = b"ready_play_one!"
+    original_digest = hash(original_message).hexdigest()
+    print(
+        f"Find a message that generate the same hash as this one: {original_digest}"
+    )
+
+    while True:
+        try:
+            message = input("Enter your message: ")
+            message = bytes.fromhex(message)
+
+            digest = hash(message).hexdigest()
+
+            if ((original_digest == digest) and (message != original_message)):
+                print(f"{FLAG}")
+            else:
+                print("Conditions not satisfied!")
+
+        except Exception as e:
+            print(f"An error occurred while processing data: {e}")
+
+
+if __name__ == '__main__':
+    main()