Changing python header

0ctf2019/babyrsa/secret.py

@@ -1,3 +1,3 @@
-#!/opt/pwn.college/python
+#!/usr/bin/exec-suid -- /usr/bin/python3
 
 flag= open("/flag", "rb").read().strip()

0ctf2021quals/cloudpass/task

@@ -1,4 +1,4 @@
-#!/opt/pwn.college/python
+#!/usr/bin/exec-suid -- /usr/bin/python3
 
 import os
 import socketserver

0ctf2021quals/zer0lfsr/task

@@ -1,4 +1,4 @@
-#!/opt/pwn.college/python
+#!/usr/bin/exec-suid -- /usr/bin/python3
 
 import random
 import signal

0x41414141ctf2021/factorize/factorize

@@ -1,4 +1,4 @@
-#!/opt/pwn.college/python
+#!/usr/bin/exec-suid -- /usr/bin/python3
 
 import binascii
 import random

0x41414141ctf2021/filereader/filereader

@@ -1,4 +1,4 @@
-#!/opt/pwn.college/python
+#!/usr/bin/exec-suid -- /usr/bin/python3
 
 import glob
 

0x41414141ctf2021/pyjail/pyjail

@@ -1,4 +1,4 @@
-#!/opt/pwn.college/python
+#!/usr/bin/exec-suid -- /usr/bin/python3
 
 import re
 from sys import modules, version

0x41414141ctf2021/soul/net

@@ -1,4 +1,4 @@
-#!/opt/pwn.college/python
+#!/usr/bin/exec-suid -- /usr/bin/python3
 
 import os
 import socketserver

0x41414141ctf2021/staple-aes/aes

@@ -1,88 +1,88 @@
-#!/opt/pwn.college/python
- 
-import os
-import socketserver
-import string
-import threading
-from time import *
-import random
-import time
-import binascii
-
-from Crypto.Cipher import AES
-from Crypto.Util.Padding import pad
-
-iv = b''
-key = b''
-flag = open("/flag", "r").read().strip()
-
-class Service(socketserver.BaseRequestHandler):
-
-    def handle(self):
-        assert len(flag) % 16 == 1
-        blocks = self.shuffle(flag)
-        ct = self.encrypt(blocks)
-        self.send(binascii.hexlify(ct))
-
-    def byte_xor(self, ba1, ba2):
-        return bytes([_a ^ _b for _a, _b in zip(ba1, ba2)])
-
-    def encrypt(self, blocks):
-        curr = iv
-        ct = []
-        cipher = AES.new(key, AES.MODE_ECB)
-        for block in blocks:
-            curr = cipher.encrypt(curr)
-            ct.append(self.byte_xor(block, curr))
-        return b''.join(ct)
-
-    def shuffle(self, pt):
-        pt = pad(pt, 16)
-        pt = [pt[i: i + 16] for i in range(0, len(pt), 16)]
-        random.shuffle(pt)
-        return pt
-
-    def send(self, string, newline=True):
-        if type(string) is str:
-            string = string.encode("utf-8")
-
-        if newline:
-            string = string + b"\n"
-        self.request.sendall(string)
-
-    def receive(self, prompt="> "):
-        self.send(prompt, newline=False)
-        return self.request.recv(4096).strip()
-
-
-class ThreadedService(
-    socketserver.ThreadingMixIn,
-    socketserver.TCPServer,
-    socketserver.DatagramRequestHandler,
-):
-    pass
-
-
-def main():
-
-    port = 3167
-    host = "0.0.0.0"
-
-    service = Service
-    server = ThreadedService((host, port), service)
-    server.allow_reuse_address = True
-
-    server_thread = threading.Thread(target=server.serve_forever)
-
-    server_thread.daemon = True
-    server_thread.start()
-
-    print("Server started on " + str(server.server_address) + "!")
-
-    # Now let the main thread just wait...
-    while True:
-        sleep(10)
-
-
-if __name__ == "__main__":
+#!/usr/bin/exec-suid -- /usr/bin/python3
+
+import os
+import socketserver
+import string
+import threading
+from time import *
+import random
+import time
+import binascii
+
+from Crypto.Cipher import AES
+from Crypto.Util.Padding import pad
+
+iv = b''
+key = b''
+flag = open("/flag", "r").read().strip()
+
+class Service(socketserver.BaseRequestHandler):
+
+    def handle(self):
+        assert len(flag) % 16 == 1
+        blocks = self.shuffle(flag)
+        ct = self.encrypt(blocks)
+        self.send(binascii.hexlify(ct))
+
+    def byte_xor(self, ba1, ba2):
+        return bytes([_a ^ _b for _a, _b in zip(ba1, ba2)])
+
+    def encrypt(self, blocks):
+        curr = iv
+        ct = []
+        cipher = AES.new(key, AES.MODE_ECB)
+        for block in blocks:
+            curr = cipher.encrypt(curr)
+            ct.append(self.byte_xor(block, curr))
+        return b''.join(ct)
+
+    def shuffle(self, pt):
+        pt = pad(pt, 16)
+        pt = [pt[i: i + 16] for i in range(0, len(pt), 16)]
+        random.shuffle(pt)
+        return pt
+
+    def send(self, string, newline=True):
+        if type(string) is str:
+            string = string.encode("utf-8")
+
+        if newline:
+            string = string + b"\n"
+        self.request.sendall(string)
+
+    def receive(self, prompt="> "):
+        self.send(prompt, newline=False)
+        return self.request.recv(4096).strip()
+
+
+class ThreadedService(
+    socketserver.ThreadingMixIn,
+    socketserver.TCPServer,
+    socketserver.DatagramRequestHandler,
+):
+    pass
+
+
+def main():
+
+    port = 3167
+    host = "0.0.0.0"
+
+    service = Service
+    server = ThreadedService((host, port), service)
+    server.allow_reuse_address = True
+
+    server_thread = threading.Thread(target=server.serve_forever)
+
+    server_thread.daemon = True
+    server_thread.start()
+
+    print("Server started on " + str(server.server_address) + "!")
+
+    # Now let the main thread just wait...
+    while True:
+        sleep(10)
+
+
+if __name__ == "__main__":
     main()

0x41414141ctf2021/wallet/wallet

@@ -1,4 +1,4 @@
-#!/opt/pwn.college/python
+#!/usr/bin/exec-suid -- /usr/bin/python3
 
 import os
 import socketserver

accessdeniedctf2022/ecc/chal

@@ -1,4 +1,4 @@
-#!/opt/pwn.college/python
+#!/usr/bin/exec-suid -- /usr/bin/python3
 
 import tinyec.ec as ec
 import tinyec.registry as reg

angstromctf2016/casino/casino

@@ -1,4 +1,4 @@
-#!/opt/pwn.college/python
+#!/usr/bin/exec-suid -- /usr/bin/python3
 
 #seed = 9519
 #flag = "actf{Men_Are_maSTers_of_thEiR_fateS}"

angstromctf2016/helpcenter/server

@@ -1,4 +1,4 @@
-#!/opt/pwn.college/python
+#!/usr/bin/exec-suid -- /usr/bin/python3
 
 key = 'c342cb3177881464'
 IV = 'ca302100528f5ef9'

angstromctf2017/casino/card_guessing

@@ -1,4 +1,4 @@
-#!/opt/pwn.college/python
+#!/usr/bin/exec-suid -- /usr/bin/python3
 
 import os,struct
 

angstromctf2017/royalcasino/casino

@@ -1,4 +1,4 @@
-#!/opt/pwn.college/python
+#!/usr/bin/exec-suid -- /usr/bin/python3
 
 import os,struct
 

angstromctf2022/randomlysampledalgorithm/rsa

@@ -1,4 +1,4 @@
-#!/opt/pwn.college/python
+#!/usr/bin/exec-suid -- /usr/bin/python3
 
 from Crypto.Util.number import getStrongPrime
 

angstromctf2024/philosophy/chall

@@ -1,4 +1,4 @@
-#!/opt/pwn.college/python
+#!/usr/bin/exec-suid -- /usr/bin/python3
 
 from Crypto.Util.number import getPrime
 #from secret import flag

angstromctf2024/presidential/source

@@ -1,4 +1,4 @@
-#!/opt/pwn.college/python
+#!/usr/bin/exec-suid -- /usr/bin/python3
 
 import ctypes
 import mmap

angstromctf2024/tss1/tss1

@@ -1,4 +1,4 @@
-#!/opt/pwn.college/python
+#!/usr/bin/exec-suid -- /usr/bin/python3
 
 from hashlib import sha256
 import fastecdsa.curve

angstromctf2024/tss2/tss2

@@ -1,4 +1,4 @@
-#!/opt/pwn.college/python
+#!/usr/bin/exec-suid -- /usr/bin/python3
 
 from hashlib import sha256
 import fastecdsa.curve

byuctf2022/blue/create.py

@@ -1,4 +1,4 @@
-#!/opt/pwn.college/python
+#!/usr/bin/exec-suid -- /usr/bin/python3
 
 from PIL import Image
 import random

byuctf2024/aresa/keygen

@@ -1,4 +1,4 @@
-#!/opt/pwn.college/python
+#!/usr/bin/exec-suid -- /usr/bin/python3
 
 from Crypto.Util.number import bytes_to_long, getPrime
 

byuctf2024/domath/domath

@@ -1,4 +1,4 @@
-#!/opt/pwn.college/python
+#!/usr/bin/exec-suid -- /usr/bin/python3
 
 from Crypto.Util.number import *
 

byuctf2024/giveup/nevergonna

@@ -1,4 +1,4 @@
-#!/opt/pwn.college/python
+#!/usr/bin/exec-suid -- /usr/bin/python3
 
 def repeat_key_xor(plain, key): # take in bytes
     output = b''