added few ctfs

cscg25/crypto/intro2/main.py

@@ -1,3 +1,5 @@
+#!/usr/bin/env python3
+
 from hashlib import sha1
 from base64 import b64encode, b64decode
 from secrets import token_hex
@@ -7,8 +9,6 @@ from secret import FLAG
 
 KEY = token_hex(16)
 
-print(KEY)
-
 
 def get_mac(data: bytes) -> str:
     return sha1(KEY.encode("latin1") + data).hexdigest()
@@ -21,8 +21,7 @@ def parse_token(token: str) -> dict:
 
     # Check the MAC
     token, mac = token.split(b"|mac=")
-    print(token, mac)
-    print(f"Calculated mac = {get_mac(token)}")
+    print(mac)
     if get_mac(token) != mac.decode("latin1"):
         return None