marcogrcr’s gists

marcogrcr / Non-Interactive-Process-Windows-Service.cs

Last active September 3, 2019 22:49

How to run a non-interactive process as another user in a Windows Service using C#? [proof-of-concept]

	/**
	* This application converts a text message to uppercase by spawning a child process as another user and saves it to a file.
	*
	* Usage: app.exe MESSAGE FILE_PATH
	* or
	* Usage: app.exe DOMAIN USERNAME PASSWORD MESSAGE FILE_PATH
	*
	*
	* Setup instructions:
	*

marcogrcr / sigv4_using_http_client.py

Last active October 22, 2024 15:17

Send request with SigV4 in python using boto3

	from boto3.session import Session
	from botocore.auth import SigV4Auth
	from botocore.awsrequest import AWSRequest
	from botocore.credentials import Credentials
	from http.client import HTTPConnection, HTTPSConnection
	import json
	import os
	from urllib.parse import urlparse

	def sigv4_request(

marcogrcr / pointer-binary-heap.js

Last active December 22, 2020 05:49

Pointer binary heap: A JavaScript binary heap implementation with pointers instead of arrays

	/** Represents a node from a binary heap. */
	class BinaryHeapNode {
	/**
	* Initializes a new instace of the `BinaryHeapNode` class.
	* @param {number} value
	* @param {*} ref
	*/
	constructor(value, ref) {
	this.value = value;
	this.ref = ref;

marcogrcr / 1-stateless-percentage.js

Created March 10, 2023 08:39

Stateless percentage: enable a feature for a percentage of customers without keeping state

	const { createHash } = require("node:crypto");

	/**
	* Returns a random value betwen 0 and 99 associated with an input value that's
	* quasi-evenly distributed.
	*
	* This function is useful for incrementally rolling out a feature to customers
	* based on a percentage.
	*
	* @param value {string} The input value to derive the output from.

marcogrcr / event-target-polyfill.js

Created March 27, 2023 19:47

A simplified EventTarget polyfill for unit testing

	/**
	* Simplified `EventTarget` polyfill.
	* @see https://developer.mozilla.org/en-US/docs/Web/API/EventTarget
	*/
	class EventTarget {
	/** @type {Map<string, { capture: boolean, listener: Function, once: boolean }[]>} */
	_listenersMap = new Map();

	/**
	* @param {string} type

marcogrcr / Get-DiskBlockSize.ps1

Created July 14, 2023 02:33

Get disk allocation block size

	# Source: https://www.alitajran.com/get-allocation-unit-size-powershell/
	Get-CimInstance -ClassName Win32_Volume \| Select-Object Name, FileSystem, Label, BlockSize \| Sort-Object Name \| Format-Table -AutoSize

marcogrcr / unexpected-type-checks.ts

Last active July 18, 2023 20:43

TypeScript unexpected type checks

	// Even with the strictest settings, the TypeScript compiler may have looser type checking than what you would expect.

	interface Data {
	req1: number;
	req2: number;
	opt1?: number;
	opt2?: number;
	}

	function logData(data: Data): void {

marcogrcr / AmbiguousFunctionalArgumentOverload.kt

Last active July 18, 2023 20:44

Ambiguous functional argument overload

	import java.util.function.Consumer
	import java.util.function.Function
	import java.util.function.Supplier

	// Take these ambiguous overloads:

	fun fn(consumerLike: (String) -> Unit) = consumerLike("").also { println("consumer-like") }

	fun fn(consumer: Consumer<String>) = consumer.accept("").also { println("consumer") }

marcogrcr / aws-mfa-credentials.py

Created October 2, 2023 03:55

Invokes AWS STS GetSessionToken using the AWS CLI and stores the temporary credentials in ~/.aws/credentials

	#!/usr/bin/env python
	import json, os, subprocess
	from argparse import ArgumentParser
	from configparser import ConfigParser
	from pathlib import Path

	# 1. parse args
	parser = ArgumentParser(
	prog='mfa-aws-credentials',
	description='Invokes AWS STS GetSessionToken using the AWS CLI and stores the temporary credentials in ~/.aws/credentials'

marcogrcr / child-src-data-proof-of-concept.mjs

Last active October 13, 2023 17:49

Content-Security-Policy: `child-src data:` for allowing `data:` URLs in workers but mitigate malicious `<iframe>`/`<frame>` elements

	import { createServer } from "node:http";

	const CSP =
	"default-src 'none'; child-src data:; frame-src https://www.example.com; script-src 'nonce-abc'; worker-src data:";

	const INDEX_PAGE = `
	<!doctype html>
	<html>
	<head>
	<meta charset="utf-8"/>

Marco Gonzalez marcogrcr