RSA (RSAwithSHA1) raw signing with SHA1 hash PKCS#1 v1.5
Allan In an attempt to implement RSA signatures on a 32-bit MCU it was necessary to investigate and perform the hashing separate from the RSA signing. In doing so I have…
Linux
Setting up an email server with postfix, dovecot, postfixadmin, and roundcube
Recently setup a new email server on a CentOS Rocky 9 VPS server and thought I would document the process below. I pulled information from a variety of webpages and…
Setting up virtual hosting (vhosts) on a Linux server with https
This guide is written with the general understanding that the reader is mostly familiar with how to access and setup a VPS Linus server. Most commands will be done over…
Easily creating self signed SSL X509 certificates
While working on an IoT project involving an MQTT server it came to be that I would be generating my own SSL certificates for the MQTT broker (mosquitto). There are…
Creating a new open source IoT platform, the MQTT server/broker
So far we have come up with the architecture and the database structure for the new IoT platform. Next we should address the MQTT communications portion. The MQTT protocol is…
Notes from building a minimum Linux Gentoo Kernel for a Raspberry Pi
Recently I have been working with more and more Raspberry Pi single board computers and as a person who likes the Linux Gentoo distribution I got the urge to make…
Sheeva64, rebuilding the kernel
In this post I am going to take a look at rebuilding the Sheeva64’s kernel. The Sheeva64 is a 64-bit ARM based single board computer based on a Marvell Armada…
Bringing a 6 year old DreamPlug (arm based) Gentoo installation up to date…
I am posting these notes on my blog hoping it is useful to someone in the future… and saves someone the 3 days it took me to come to these…