github

This is a dockerized version of the miniPaint project by viliusle, a web/node based paint tool to self host.

A simple script exporting chats from a rocket chat instance using the public REST API. Useful if no administrative access is possible.

Global checkstyle config to be reused in different projects. These include my own personal rules so your milage may vary.

IDMask is a Java library for masking internal ids (e.g. from your DB) when they need to be published to hide their actual value and to prevent forging. It has support optional randomisation has a wide support for various Java types including long, UUID and BigInteger.

A maven configuration which can be used as a commons config parent for POM files

BCrypt based key derivation function to improve BCrypt as a cryptographic primitive for password hashing and key derivation

Implementation of the single-step key derivation function (KDF) as described in NIST Special Publication 800-56C Rev1 supporting messages digest and HMAC.

A Java standalone implementation of the bcrypt password hash function. Based on the Blowfish cipher it is the default password hash algorithm for OpenBSD and other systems including some Linux distributions. Includes a CLI Tool.

The source for my private website powered by hugo a static code generators and typescript/node based CLI to fetch my content from various sites..

A simple static website created with jekyll

SLF4J binding for Timber - a logger with a small, extensible API which provides utility on top of Android`s normal Log class.

A shared preference implementation for confidential data in Android. Per default uses AES-GCM, BCrypt and HKDF as cryptographic primitives. Uses the concept of device fingerprinting combined with optional user provided passwords and strong password hashes.

Bytes is a utility library that makes it easy to create, parse, transform, validate and convert byte arrays in Java. It supports endianness as well as immutability and mutability, so the caller may decide to favor performance.

A standalone Java 7 implementation of HMAC-based key derivation function (HKDF) defined in RFC 5869 first described by Hugo Krawczyk. HKDF follows the “extract-then-expand” paradigm which is compatible to NIST 800-56C Rev. 1 two step KDF

A cryptographically secure pseudorandom number generator cli tool printing in a wide variety of byte encodings (hex, base64,..) and for many programming languages (c, java, c#, php, etc.) using NIST SP800-90Ar1 HMAC-DRBG. Supports external seeding from various true random services.