Warmwasserwerfer Blog

Tag: java

Towards OpenPGP v6 in PGPainless

OpenPGP scrambles your messages in a more secure way than this very analog real world example.

I’m very excited to announce the results of what I have been working on for the past 1,5 years. *drumrolls* I added support for OpenPGP v6 (rfc9580) in both Bouncy Castle and PGPainless! In this blog post, I want to go over the work in more details.

August 28, 2025
Use Any SOP Binary With SOP-Java and External-SOP

I just released another library named external-sop, which implements sop-java and allows the user to use any SOP CLI application of their choice from within their Java / Kotlin application!

January 13, 2023
Implementing Packet Sequence Validation using Pushdown Automata

In the previous blog post I discussed how a formal grammar can be transformed into a pushdown automaton in order to check if a sequence of packets or tokens is part of the language described by the grammar. In this post I will discuss how I implemented said automaton in Java in order to validate…

October 26, 2022
Using Pushdown Automata to verify Packet Sequences

As a software developer, most of my work day is spent working practically by coding and hacking away. Recently though I stumbled across an interesting problem which required another, more theoretical approach…

September 14, 2022
Reproducible Builds – Telling of a Debugging Story

I try to make PGPainless build reproducible. A few months ago I added some lines to the build script which were supposed to make the project reproducible by using static file modification dates, as well as a deterministic file order in the JAR archive. However, recently my JAR files started to contain mismatching bytes…

June 20, 2022
PGPainless 1.0.0 Released!

Close to the end of 2021 I’m excited to announce the release of PGPainless version 1.0.0! I feel like it finally reached a state of sufficient maturity to be worthy of a major release with a “1” at the front.

December 30, 2021
A Simple OpenPGP API

In this post I demonstrate how easy it is to perform OpenPGP operations in your application by using the SOP API.

October 10, 2021
Progress on PGPainless Development

Photo by Raphael Koh on Unsplash

Not much time has passed since I last wrote about my progress on the PGPainless library. However, I feel like its time for an update.

July 20, 2021
PGPainless 0.2 Released!

I’m very proud and excited to announce the release of PGPainless version 0.2! Among the major improvements are proper signature verification and a new encryption API.

June 2, 2021
PGPainless 0.1.0 released

Photo by Markus Winkler on Unsplash

After two years and a dozen alpha versions I am very glad to announce the first stable release of PGPainless, a library that makes using OpenPGP fun again!

September 1, 2020