C0deH4cker’s gists

C0deH4cker / hungman.py

Created July 31, 2019 02:23

Exploit for [PWN 300] Hungman from CSAW CTF Quals 2016

	#!/usr/bin/env python
	from pwn import *
	import sys

	debug_server = False
	use_system_libc = True
	r = remote("pwn.chal.csaw.io", 8003); use_system_libc = False
	# r = process("./hungman")
	# r = process("./linux_serverx64"); debug_server = True

C0deH4cker / this_is_bad.c

Created February 2, 2018 05:18

This is bad

	/* THIS IS VERY BAD */

	#define CONCAT(a, b) CONCAT_(a, b)
	#define CONCAT_(a, b) a##b

	#define THIS_IS_BAD(test, first, rest, cond, body...) THIS_IS_BAD_2(__COUNTER__, test, first, rest, cond, ##body)
	#define THIS_IS_BAD_2(uniq, test, first, rest, cond, body...) THIS_IS_BAD_3(CONCAT(this_is_bad_, uniq), test, first, rest, cond, ##body)
	#define THIS_IS_BAD_3(label, test, first, rest, cond, body...) do { \
	if(test) { \
	first(); \

C0deH4cker / crash.swift

Created February 5, 2017 08:45

Crash the swift interpreter by entering the first part, followed by entering the second part. Must be separate copy/pastes!

C0deH4cker / thread_local_lldb.c

Created June 26, 2016 08:16

Sample source file exhibiting incorrect debug info within Xcode

	#include <stdio.h>

	// Even making the pointer volatile doesn't help
	__thread int* tl_ptr;

	int main(void) {
	int x = 0xDEAD;

	// Put a breakpoint on the following line
	tl_ptr = &x;

C0deH4cker / syms.c

Created March 20, 2016 03:21

Prints out the name, type, and value of every symbol in a Mach-O file, similar to nm.

	//
	// main.c
	// macho-syms
	//
	// Created by C0deH4cker on 3/19/16.
	// Copyright © 2016 C0deH4cker. All rights reserved.
	//

	#include <stdio.h>
	#include <stdlib.h>

C0deH4cker / keybase.md

Last active March 2, 2017 12:12

Keybase.io GitHub Verification

I hereby claim:

To claim this, I am signing this object:

C0deH4cker / destroy.h

Created November 14, 2015 05:36

Safer way to free a variable in C

	#include <stdlib.h>

	/! Frees the pointer pointed to by the parameter and then sets it to NULL /
	#define destroy(pptr) do { \
	__typeof__((pptr)) volatile _pptr = (pptr); \
	if(!_pptr) { \
	break; \
	} \
	free(*_pptr); \
	*_pptr = NULL; \

C0deH4cker / patternhooker.c

Last active January 19, 2022 02:04

Example of hooking a function from a Substrate tweak by searching for a byte pattern in the app's code segments. UNTESTED CODE

	//
	// patternhooker.c
	// PatternHooker
	//
	// Finds a function by searching for a byte pattern and hooks it with CydiaSubstrate.
	//
	// Created by C0deH4cker on 7/26/15.
	// Copyright (c) 2015 C0deH4cker. All rights reserved.
	//

C0deH4cker / with.h

Created June 10, 2015 08:34

Python's with statement, implemented in C++ via macros

	// Just like C#'s using statement and Python's with statement.
	// This allows use of a resource within a code block, after which
	// the declared object's destructor will clean up.
	// There's nothing about `with` that doesn't work in C, but it is
	// pointless in standard C as there are no destructors.
	// Multiple with statements can be nested as well, so it works as
	// you'd expect. If for some bizarre reason you need to put multiple
	// using statements on the same line, I've added another version,
	// defined below as with_inline.
	//

C0deH4cker / wordshift.cpp

Created February 11, 2015 21:18

Determine all possible valid words that can be formed by shifting a valid word by one on a keyboard

	//
	// wordshift.cpp
	// WordShift
	//
	// Created by C0deH4cker on 2/11/15.
	// Copyright (c) 2015 C0deH4cker. All rights reserved.
	//

	#include <iostream>
	#include <fstream>

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