rfl890’s gists

rfl890 / aes-ecb-sucks.sh

Last active August 24, 2024 13:37

Shell one-liner to display the weakness of AES-ECB

	# requires ffmpeg and curl
	curl https://upload.wikimedia.org/wikipedia/commons/thumb/3/35/Tux.svg/864px-Tux.svg.png \| ffmpeg -i - -c:v ppm -f image2 - \| tail -c +17 \| openssl enc -e -aes-256-ecb -K d38b38a2dd476e045c299e8ee5d6466834456d97bd592a71746b423a6a05f386 \| head -c -16 \| cat <(printf "P6\n864 1024\n255\n") - \| ffmpeg -i - -c:v png -f image2 - \| ffplay -

rfl890 / main.c

Created May 7, 2024 14:02

Macro Abuse 2: Electric Boogaloo

rfl890 / dice-roll-rdrand.c

Created April 29, 2024 18:12

Dice Roll with RDRAND

	#include <stdint.h>
	#include <immintrin.h>

	#ifdef __GNUC__
	#define LOG2(X) \
	((uint32_t)(8 * sizeof(unsigned long long) - __builtin_clzll((X)) - 1))
	#else
	#ifdef _MSC_VER
	#include <intrin.h>
	inline uint32_t LOG2(uint64_t X) {

rfl890 / find-closest-bitstring.c

Last active April 29, 2024 18:08

	#include <stdint.h>

	#ifdef __GNUC__
	#define LOG2(X) \
	((uint32_t)(8 * sizeof(unsigned long long) - __builtin_clzll((X)) - 1))
	#else
	#ifdef _MSC_VER
	#include <intrin.h>
	inline uint32_t LOG2(uint64_t X) {
	unsigned long out;

rfl890 / timing-safe-equal.js

Created March 13, 2024 19:37

Timing safe comparison in JavaScript

 function timingSafeEqual(a, b) {
   	if (a.length !== b.length) return false;
     let result = 0;
     for (let i = 0; i < a.length; i++) {
         result |= a[i] ^ b[i];
     }
     return result === 0;
 }

rfl890 / 0001-Update-PRNG.patch

Created January 24, 2024 23:15

Patch

	From c796842c4aaaca1b640a1fd0e03c9d8e85f571c8 Mon Sep 17 00:00:00 2001
	From: rfl890 <87506407+rfl890@users.noreply.github.com>
	Date: Wed, 24 Jan 2024 18:14:16 -0500
	Subject: [PATCH] Update PRNG

	---
	src/lib_math.c \| 2 +-
	src/lj_prng.c \| 43 ++++++++++++++++++++++---------------------
	2 files changed, 23 insertions(+), 22 deletions(-)

rfl890 / build-lua-to-exe.lua

Last active August 26, 2024 10:33

	-- Change to the path of lua51.lib/libluajit-2.1.a/whatever LuaJIT library you link against
	local lua_slib = "\"C:\\Users\\user\\bin\\luajit\\lib\\lua51.lib\""
	local CC = "clang -O2"

	local stub_code = [[#include <lua.h>
	#include <lauxlib.h>
	#include <lualib.h>
	#include <luajit.h>

	#include <stdlib.h>

rfl890 / color.lua

Created November 30, 2023 22:30

Lua color library

	local lib_color = {}

	-- Constants
	lib_color.color_type = { TYPE_8 = 39710315, TYPE_256 = 34942623, TYPE_RGB = 29505187 }
	local FOREGROUND = 1
	local BACKGROUND = 2


	local ESCAPE = "\x1b["
	local RESET = "\x1b[0m"

rfl890 / sha256.c

Created September 11, 2023 18:43

CNG hash

rfl890 / lua-unicode-input.lua

Last active December 13, 2023 00:30

Hacky way of obtaining Unicode input as UTF-8 in Lua(JIT)