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@tuansoibk
tuansoibk / cryptography-file-formats.md
Last active September 6, 2025 20:23
Cryptography material conversion and verification commands
  1. Introduction
  2. Standards
  3. Common combinations
  4. Conversion
  5. Verification/Inspection
  6. Tips for recognising

Introduction

It happens that there are many standards for storing cryptography materials (key, certificate, ...) and it isn't always obvious to know which standard is used by just looking at file name extension or file content. There are bunch of questions on stackoverflow asking about how to convert from PEM to PKCS#8 or PKCS#12, while many tried to answer the questions, those answers may not help because the correct answer depends on the content inside the PEM file. That is, a PEM file can contain many different things, such as an X509 certificate, a PKCS#1 or PKCS#8 private key. The worst-case scenario is that someone just store a non-PEM content in "something.pem" file.

@abel0b
abel0b / install-linux-perf-on-wsl2.sh
Last active October 4, 2025 02:25
Install perf on WSL 2
apt install flex bison
git clone https://github.com/microsoft/WSL2-Linux-Kernel --depth 1
cd WSL2-Linux-Kernel/tools/perf
make -j8
sudo cp perf /usr/local/bin
@FedericoPonzi
FedericoPonzi / CI.yml
Last active May 4, 2024 07:19
Ready to use Github workflow for cross-compiling a rust binary to many Linux architectures.
# Instruction + template repo: https://github.com/FedericoPonzi/rust-ci
# Search and replace <YOUR_BINARY_NAME> with your binary name.
name: CI
on:
pull_request:
push:
branches:
- master
tags:
@shinyquagsire23
shinyquagsire23 / gist:f7907fdf6b470200702e75a30135caf3
Created January 8, 2020 05:48
Philips Hue BLE Services and Characteristics (WIP)
DeviceInfo(softwareRevision, isOn,
SceneLightState(color, powerOnBehavior, deviceInfo
Light(id,
Capabilities(dimmable, customState
PowerOnBehavior(option
hueplay, huebloom, hueiris, huelightstrip, huego, plug, bollard, wallspot, groundspot, flexiblelamp, wallshade, walllantern
[ea:44:13:bd:db:59] Service [b8843add-0000-4aa1-8794-c3f462030bda] Unknown, ble_firmware_update?
[ea:44:13:bd:db:59] Characteristic [b8843add-0004-4aa1-8794-c3f462030bda]
@yuqlid
yuqlid / .travis.yml
Created July 20, 2018 16:03
Travis CI script for arm-gcc
notifications:
email: false
sudo: false
language: c
matrix:
fast_finish: true
include:
@yellowbyte
yellowbyte / compiling_asm.md
Last active May 27, 2025 21:57
how to assemble assembly with NASM assembler to 32-bit or 64-bit ELF binary with or without libc

32-bit ELF binary

how to assemble and link:

nasm -f elf32 -o <filename>.o <filename>.asm
ld -m elf_i386 -o <filename> <filename>.o

template code (hello world):

section .text
global _start
Basic
=====
[Shift]+[Mod]+[Enter] - launch terminal.
[Mod]+[b] - show/hide bar.
[Mod]+[p] - dmenu for running programs like the x-www-browser.
[Mod]+[Enter] - push acive window from stack to master, or pulls last used window from stack onto master.
[Mod] + [j / k] - focus on next/previous window in current tag.

Problem

In Arch Linux mkinitcpio -p linux

shows

Possibly missing firmware for module: aic94xx
 Possibly missing firmware for module: wd719x
@resilar
resilar / pdlsym.c
Last active March 11, 2025 20:34
dlsym() for remote processes
#include <errno.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ptrace.h>
#include <sys/types.h>
#include <unistd.h>
struct elf {
@eugene-babichenko
eugene-babichenko / CMakeLists.txt
Last active July 1, 2023 18:01
CMakeLists.txt and toolchain file for building STM32 HAL-based projects generated with STM32CubeMX with arm-none-eabi-gcc. STM32CubeMX settings. Toolchain: SW4STM32. ☑ Generate under root.
set(PRJ_NAME CLion_STM_LED)
set(MCU_FAMILY STM32F1xx)
set(MCU_LINE STM32F103xB)
set(MCU_LINKER_SCRIPT STM32F103RBTx_FLASH.ld)
cmake_minimum_required(VERSION 3.6)
project(${PRJ_NAME} C ASM)
add_definitions(-D${MCU_LINE})