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1. spring-boot-oauth2-resourceserver spring-boot-oauth2-resourceserver Public

   A Spring Boot OAuth2 resourceserver demo

   Java

2. flask-oauth2-validation flask-oauth2-validation Public

   Flask OAuth2 decorator for local and remote validation of self-encoded JWT based Bearer access tokens.

   Python 4 2

3. lab-oauth2-device-flow lab-oauth2-device-flow Public

   A simple Python script for testing the OAuth2 device flow

   Python

4. GnuPG + SSH + YubiKey GnuPG + SSH + YubiKey

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   # GnuPG + SSH Authentication using a YubiKey or Smartcard

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   This is about how I setup and use [GnuPG](https://www.gnupg.org) for signing and encrypting data as well as for authenticating [SSH](https://en.wikipedia.org/wiki/Secure_Shell) sessions. I use both, a [YubiKey](https://www.yubico.com) (4 and 5 NFC) and a GnuPG smartcard from [ZeitControl](https://www.floss-shop.de/de/zeit-control/) to have a backup in my wallet. As a smartcard reader I use the [uTrust 2700 R](https://support.identiv.com/2700r/) which works quite well.<br/>

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   My typical use cases are SSH authentication, secure file exchange via public places and signing [Git](https://git-scm.com) commits. I rarely use GnuPG for email communication. And I neither sign other GnuPG user IDs nor participate in the [WOT](https://en.wikipedia.org/wiki/Web_of_trust).<br/>

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   Since there is no difference between setting up a YubiKey or a smartcard the following description mentions the GnuPG smartcard only.

5. Raspberry Pi Zero - Bridge Network S... Raspberry Pi Zero - Bridge Network Setup

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   The goal of this article is to explain how to install one or many *Raspberry Pi 3 B+* devices connected with one to four *Raspberry Pi Zero 1.3* devices each via [USB OTG](https://en.m.wikipedia.org/wiki/USB_On-The-Go) networking.

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   ## Preview

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   Each device - Pi and Zero - will be connected to the network ```192.168.0.0/24```. Each Zero will be connected via _USB OTG_ to the Pi. That will establish a network between the two devices. On each Pi a network bridge will be configured to forward the traffic between the Pi ethernet port and the connected USB ports.

6. Raspberry Pi PWM Fan Controller Raspberry Pi PWM Fan Controller

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   After mounting the GPIO hammer headers to my RPi Zero I am now ready to do some prototyping. The first thing I wanted to test is controlling a 4 pin PWM fan. So here is a short howto on that.

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   # Prerequisites

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   Besides a RPi Zero with pin headers you need a 4 pin [PWM (Pulse With Modulation)](https://en.wikipedia.org/wiki/Pulse-width_modulation) fan. I took a [Noctua NF-F12 5V fan](https://smile.amazon.de/gp/product/B07DXDQKZM/). Be aware that when you take a 12V fan it will damage your board!

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