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@madd0
madd0 / md5.cs
Created November 15, 2011 09:06
Create an MD5 hash digest in C#
public static string MD5Hash(string toHash)
{
string hashed;
using (MD5 md5 = MD5.Create())
{
hashed = string.Join(string.Empty, md5.ComputeHash(Encoding.UTF8.GetBytes(toHash)).Select(b => b.ToString("x2")));
}
return hashed;
@zachbonham
zachbonham / crypto.cs
Created September 10, 2012 17:57
RSA public key encryption in C#
using System;
using System.Diagnostics;
using System.Security.Cryptography;
using System.Text;
namespace Crtypto
{
class Program
{
static void Main(string[] args)
@dylancwood
dylancwood / tree.css
Last active June 23, 2025 06:37
CSS to create a simple tree structure with connecting lines. No images or JS required.
ul.tree, ul.tree ul {
list-style: none;
margin: 0;
padding: 0;
}
ul.tree ul {
margin-left: 10px;
}
ul.tree li {
margin: 0;
@baywet
baywet / pfxtosnk.cs
Created October 4, 2014 00:39
sample on how to convert a pfx to snk visual studio assembly signing certificate
X509Certificate2 cert = new X509Certificate2(@"KEY.pfx", "pfxPassword", X509KeyStorageFlags.Exportable | X509KeyStorageFlags.PersistKeySet);
RSACryptoServiceProvider provider = (RSACryptoServiceProvider) cert.PrivateKey;
byte[] array = provider.ExportCspBlob(!provider.PublicOnly);
using (FileStream fs = new FileStream("FileName.snk", FileMode.Create, FileAccess.Write))
{
fs.Write(array, 0, array.Length);
}
@fntlnz
fntlnz / self-signed-certificate-with-custom-ca.md
Last active July 8, 2025 11:45
Self Signed Certificate with Custom Root CA

Create Root CA (Done once)

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 genrsa -des3 -out rootCA.key 4096
@cskeeters
cskeeters / broadcast_calc.sh
Created December 8, 2016 19:17
Bash script for calculating network and broadcast addresses from ip and netmask or CIDR Notation
#!/bin/bash
# Calculates network and broadcast based on supplied ip address and netmask
# Usage: broadcast_calc.sh 192.168.0.1 255.255.255.0
# Usage: broadcast_calc.sh 192.168.0.1/24
tonum() {
if [[ $1 =~ ([[:digit:]]+)\.([[:digit:]]+)\.([[:digit:]]+)\.([[:digit:]]+) ]]; then
@briansmith
briansmith / how-to-generate-and-use-private-keys-with-openssl-tool.md
Last active March 21, 2025 11:43
How to generate & use private keys using the OpenSSL command line tool

How to Generate & Use Private Keys using OpenSSL's Command Line Tool

These commands generate and use private keys in unencrypted binary (not Base64 “PEM”) PKCS#8 format. The PKCS#8 format is used here because it is the most interoperable format when dealing with software that isn't based on OpenSSL.

OpenSSL has a variety of commands that can be used to operate on private key files, some of which are specific to RSA (e.g. openssl rsa and openssl genrsa) or which have other limitations. Here we always use

@styblope
styblope / docker-api-port.md
Last active July 14, 2025 07:15
Enable TCP port 2375 for external connection to Docker

Enable TCP port 2375 for external connection to Docker

See this issue.
Docker best practise to Control and configure Docker with systemd.

  1. Create daemon.json file in /etc/docker:

     {"hosts": ["tcp://0.0.0.0:2375", "unix:///var/run/docker.sock"]}
    
@elklein96
elklein96 / self_signed_certs.md
Created February 14, 2018 04:32
A quick guide for creating self-signed certificates using OpenSSL

Creating a Self-Signed Certificate

Prerequisites

  • You'll need to install OpenSSL to create and sign certificates.
    • Linux: sudo apt-get install openssl
    • MacOS: brew install openssl

Getting Started

@fnky
fnky / ANSI.md
Last active July 20, 2025 12:08
ANSI Escape Codes

ANSI Escape Sequences

Standard escape codes are prefixed with Escape:

  • Ctrl-Key: ^[
  • Octal: \033
  • Unicode: \u001b
  • Hexadecimal: \x1B
  • Decimal: 27