Paolo Botti dcube9

How to create an HTTPS certificate for localhost domains

This focuses on generating the certificates for loading local virtual hosts hosted on your computer, for development only.

Do not use self-signed certificates in production ! For online certificates, use Let's Encrypt instead (tutorial).

Create Root CA (Done once)

Last update: Nov 2025.

Create Root Key

Attention: this is the key used to sign the certificate requests, anyone holding this can sign certificates on your behalf. So keep it in a safe place!

openssl ecparam -genkey -name secp384r1 | openssl ec -aes256 -out rootCA.key

	# Remove the line below if you want to inherit .editorconfig settings from higher directories
	root = true

	[*]

	#### Core EditorConfig Options ####

	# Indentation and spacing
	indent_size = 4
	indent_style = space

	using System.IO.Compression;
	using Microsoft.AspNetCore.Http;

	namespace DecompressDemo.Models.Services.Infrastructure
	{
	public class DocumentPersister
	{
	public void DecompressZipArchive(string directory, IFormFile formFile)
	{
	using Stream stream = formFile.OpenReadStream();