Skip to content

Instantly share code, notes, and snippets.

View garymike's full-sized avatar

Michael garymike

15 followers · 42 following
  • Chicago, IL
View GitHub Profile
@EverythingSmartHome
EverythingSmartHome / All open windows and doors
Last active November 7, 2025 04:06
A collection of useful templates for Home Assistant dashboards
{{ states.binary_sensor
| selectattr('attributes.device_class', 'in', ['door','window'])
| selectattr('state', 'equalto', 'on')
| list | count }}
@dafthack
dafthack / azure_client_ids.txt
Created June 16, 2023 11:57
A collection of client IDs that can be used to authenticate a user, and their associated application name that shows up in Azure Sign-In logs.
00b41c95-dab0-4487-9791-b9d2c32c80f2 - Office 365 Management
04b07795-8ddb-461a-bbee-02f9e1bf7b46 - Microsoft Azure CLI
0ec893e0-5785-4de6-99da-4ed124e5296c - Office UWP PWA
18fbca16-2224-45f6-85b0-f7bf2b39b3f3 - Microsoft Docs
1950a258-227b-4e31-a9cf-717495945fc2 - Microsoft Azure PowerShell
1b3c667f-cde3-4090-b60b-3d2abd0117f0 - Windows Spotlight
1b730954-1685-4b74-9bfd-dac224a7b894 - Azure Active Directory PowerShell
1fec8e78-bce4-4aaf-ab1b-5451cc387264 - Microsoft Teams
22098786-6e16-43cc-a27d-191a01a1e3b5 - Microsoft To-Do client
268761a2-03f3-40df-8a8b-c3db24145b6b - Universal Store Native Client
@DavidBuchanan314
DavidBuchanan314 / 00_writeup.md
Last active June 2, 2025 05:02

MD5 Collision with CRC32 Preimage

Here's the scenario: We want to craft two different messages with the same MD5 hash, and a specific CRC32 checksum, simultaneously.

In other words, we want an MD5 collision attack and a CRC32 preimage attack.

This might seem like a contrived scenario, but it's exactly the one I faced while producing my PNG hashquine (Yes OK maybe that's also a contrived scenario, cut me some slack).

On its own, a CRC32 preimage attack is trivial. You can craft a 4-byte suffix that gives any message a specific checksum, calculated using a closed-form expression (which I am too lazy to derive, not even with assistance from Z3). It's not an attack per-se, since CRC32 was never meant to be cryptograpically secure in the first place.

@mattdesl
mattdesl / cli.js
Created September 13, 2022 10:37
colour palette from text prompt using Stable Diffusion https://twitter.com/mattdesl/status/1569457645182152705
/**
* General-purpose NodeJS CLI/API wrapping the Stable-Diffusion python scripts.
*
* Note that this uses an older fork of stable-diffusion
* with the 'txt2img.py' script, and that script was modified to
* support the --outfile command.
*/
var { spawn, exec } = require("child_process");
var path = require("path");
@SwitHak
SwitHak / 20211210-TLP-WHITE_LOG4J.md
Last active October 14, 2025 08:35
BlueTeam CheatSheet * Log4Shell* | Last updated: 2021-12-20 2238 UTC

Security Advisories / Bulletins / vendors Responses linked to Log4Shell (CVE-2021-44228)

Errors, typos, something to say ?

  • If you want to add a link, comment or send it to me
  • Feel free to report any mistake directly below in the comment or in DM on Twitter @SwitHak

Other great resources

  • Royce Williams list sorted by vendors responses Royce List
  • Very detailed list NCSC-NL
  • The list maintained by U.S. Cybersecurity and Infrastructure Security Agency: CISA List
@psobot
psobot / kos_file_dumper.py
Last active June 13, 2023 16:27
Kurzweil KOS File Packer/Unpacker
"""
Kurzweil K2500/K2600 KOS operating system update file packer/repacker
by Peter Sobot, Nov 6, 2021
@psobot / [email protected]
Requirements: none! Pure Python. Just use Python 3.2+.
"""
import os
import math
@tylermorganwall
tylermorganwall / submarine_cable_map.R
Last active September 19, 2025 10:50
Submarine Cable Map Dataviz
library(geojsonsf)
library(sf)
library(rayrender)
#Data source: https://github.com/telegeography/www.submarinecablemap.com
cables = geojson_sf("cable-geo.json")
cablescene = list()
counter = 1
for(i in 1:length(cables$geometry)) {
@jdhitsolutions
jdhitsolutions / New-WindowsTerminalProfile.ps1
Last active November 5, 2019 04:04
A proof of concept PowerShell function to add a new profile to the Windows Terminal Preview (0.2.1831.0).
Function New-WindowsTerminalProfile {
[cmdletbinding(SupportsShouldProcess)]
Param(
[Parameter(Position = 0, Mandatory)]
[ValidateNotNullOrEmpty()]
[alias("name")]
[string]$ProfileName,
[Parameter( Mandatory)]
[ValidateNotNullOrEmpty()]
@cpickall
cpickall / photo_to_halftone_for_laser_cutter.pde
Created February 3, 2018 16:30
Processing file converts image to grid of circles to make laser cut screen
import processing.pdf.*;
PImage pic;
String myFile = "myImage.jpg";
int w, h;
void setup(){
pic = loadImage(myFile);
h = pic.height;
w = pic.width;
@aallan
aallan / mac-vendor.txt
Last active November 5, 2025 10:55
List of MAC addresses with vendors identities
000000 Officially Xerox
000001 SuperLAN-2U
000002 BBN (was internal usage only, no longer used)
000003 XEROX CORPORATION
000004 XEROX CORPORATION
000005 XEROX CORPORATION
000006 XEROX CORPORATION
000007 XEROX CORPORATION
000008 XEROX CORPORATION
000009 powerpipes?