minaminao

Writeup for AlpacaHack 2100

問題文には、

🦙 < フラグは Daily AlpacaHack の 2100年1月 のカレンダーにあるパカ

と書いてあるので、2100年1月のカレンダーを見に行きましょう。

Daily AlpacaHack のカレンダーは「次の月」ボタンを押せば、次の月に進めます。

minaminao

import os

os.environ['PWNLIB_NOTERM'] = '1'
os.environ['TERM'] = 'linux'

from pwn import *

from Crypto.Util.number import long_to_bytes, bytes_to_long

def message_not_define(name):

minaminao

from pwn import remote
from tqdm import tqdm

LOCAL = True

for lucky_count in tqdm(range(5000)):
    print(f"trying {lucky_count=}")
    if LOCAL:
        r = remote("localhost", 5001, level="debug")
    else:

minaminao

CALL_OBJECT_BYTECODE = bytes.fromhex("21820000" + "000000")  # CALL_OBJECT 000000??
KEYS = "1234567890QWERTYUIOPASDFGHJKL{ZXCVBNM_-}"
PACKET_LEN = 192
PACKET_HEADER_LEN = 8
FLAG_LEN = 47

flag = ""

for flag_i in range(FLAG_LEN):
    m2ts = open(f"STREAM/{flag_i:05}.m2ts", "rb").read()

minaminao

zer0pts CTF 2023 fvm (Rev) Writeup

Challenge

Are you bored with x86? Enjoy this x87 VM.

Writeup

minaminao

Problem

The following code is given (source).

from fielddef import FQFac

q = 115792089210356248762697446949407573529996955224135760342422259061068512044369
GF = FQFac(q)

minaminao

// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.13;

import "forge-std/Test.sol";

contract SelfDestructSuccessTest is Test {
    function testSecure() public {
        Secure secure = new Secure();
        Exploit exploit = new Exploit();
        secure.f{value: 1 ether}(address(exploit));

minaminao

Keybase proof

I hereby claim:

• I am minaminao on github.
• I am minaminao (https://keybase.io/minaminao) on keybase.
• I have a public key whose fingerprint is AAD8 B9A4 548F 2BCF 66A2 DD7F CF82 B03C 4332 6D50

To claim this, I am signing this object:

minaminao

# https://github.com/Kaggle/kaggle-environments/blob/master/kaggle_environments/envs/halite/helpers.py
import datetime
import math
from operator import pos
import random
import sys
import time
from collections import deque
from heapq import heappop, heappush

minaminao