gsuberland

// dump ProductPolicy data structure from Windows
// ref: https://www.geoffchappell.com/studies/windows/km/ntoskrnl/api/ex/slmem/productpolicy.htm

using (var pok = Microsoft.Win32.Registry.LocalMachine.OpenSubKey(@"SYSTEM\ControlSet001\Control\ProductOptions", false))
{
	byte[] policy = (byte[])pok.GetValue(@"ProductPolicy");
	using (var ms = new MemoryStream(policy))
	using (var br = new BinaryReader(ms))
	{
		Console.WriteLine("total license data size (including header): {0}", br.ReadUInt32());

gsuberland

// quick bit of code to move displays to specific locations in C#

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
public struct DEVMODE
{
	[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
	public string dmDeviceName;

	public short dmSpecVersion;
	public short dmDriverVersion;

gsuberland

// ==UserScript==
// @name         Load HQ Video on Twitter
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Forces Twitter to always load the highest bitrate video available.
// @author       Graham Sutherland
// @match        https://twitter.com/*
// @icon         https://www.google.com/s2/favicons?domain=twitter.com
// @grant        none
// ==/UserScript==

gsuberland

// see: https://bugs.chromium.org/p/chromium/issues/detail?id=1201106
// see: https://twitter.com/gsuberland/status/1445547814965055488

#include <Windows.h>
#include <stdio.h>
#include <TlHelp32.h>
#include <memory>
#include <cassert>
#include <vector>

gsuberland

// dump LE EXE headers for mixed 16/32-bit VXDs

// ref: https://faydoc.tripod.com/formats/exe-LE.htm
// ref: https://github.com/open-watcom/open-watcom-v2/blob/master/bld/watcom/h/exeflat.h
// ref: http://www.textfiles.com/programming/FORMATS/lxexe.txt (this is for LX, not LE, but layout is roughly the same)

enum Endianness : byte
{
	LittleEndian = 0,
	BigEndian = 1

gsuberland

// ref: http://fileformats.archiveteam.org/wiki/Linear_Executable
// ref: https://moddingwiki.shikadi.net/wiki/Linear_Executable_(LX/LE)_Format
// ref: https://github.com/open-watcom/open-watcom-v2/blob/master/bld/watcom/h/exeflat.h (this is specifically for LE VXDs)
// ref: http://www.textfiles.com/programming/FORMATS/lxexe.txt (comprehensive but actually for LX, not LE)

typedef unsigned char   undefined;

typedef unsigned char    byte;
typedef unsigned long    dword;
typedef unsigned long    uint3;

gsuberland

/*
This computes the 16-bit hash used to protect Excel workbooks through most versions.

When trying to open such a sheet for editing, you'll get a message such as:
    blah.xlsx is reserved by [user]. Enter password for write access, or open read only.

In xl\workbook.xml the hash is stored as follows: <fileSharing userName="user" reservationPassword="ABCD" />
In that case, you'd compare the output of the hash function to 0xABCD.

For 99% of cases you can just throw a wordlist like rockyou at any hash and it'll spit out hundreds of collisions.

gsuberland

.intel_syntax noprefix
.altmacro
.section .data
.align 4

.globl KernelInterruptContext
KernelInterruptContext:
.long 0 // eax
.long 0 // ebx
.long 0 // ecx

gsuberland

using System;
using System.Collections;

namespace ChessboardPuzzle
{
    static class Program
    {
        static void Main()
        {
            // Inspired by 3blue1brown's excellent video on the topic: https://www.youtube.com/watch?v=wTJI_WuZSwE

gsuberland

#ifndef __INCLUDE_INTERRUPTS_H__
#define __INCLUDE_INTERRUPTS_H__


#include "Arduino.h"
#include <algorithm>


typedef void (*ISRFunctionPtr)();