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Open Source at A-SIT Plus

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Below you'll find projects developed at A-SIT/A-SIT Plus published as free and open-source software. We heavily rely on Kotlin multiplatform. Hence, some of the project's build-scripts might also be of interest to the public, even if a certain project may be specifically tailored to our internal needs.

See also our GitHub Organization for additional projects.

Wallet

Valera

A VC-K-powered Compose Multiplatform identity wallet app supporting various VC types and formats. Not intended for production use, but gives a glimpse of what lies ahead for the EUDIW.

VC-K

KMP (JVM and iOS) verifiable credentials library implementing the W3C VC data model and ISO 18013-5 mDL. Issues (ARIES, OID4VCI), presents (ARIES, SIOPv2), and verifies VCs.

Credentials Collection

Collection of all verifiable credentials implemented using VC-K. Features IDA Credentials, Mobile Driving License, EU PID Credential, Power of Representation, and Certificate of Residence.

Pupil ID Library

KMP library implementing features of the Austrian electronic pupil ID (edu.digicard) as W3C Verifiable Credentials. Targets iOS and Android on the client side, and JVM back-ends.

Crypto/Infrastructure

WARDEN

Server-side mobile client attestation library. Provides a unified interface for remotely establishing trust in iOS and Android clients. Configurable from Spring Boot and Hoplite.

WARDEN-roboto

High-level server-side an­droid key and app attes­tation library. Integral part of WARDEN. Integrates upstream attestation verification logic from Google. Configurable from Spring Boot and Hoplite.

Signum

KMP crypto provider and PKI library supporting key and app attestation on iOS and Android. 100% pure Kotlin ASN.1 engine included! Interops with JOSE, COSE, JCA and iOS datatypes.

CIDRE

100% pure Kotlin multiplatform zero-dependency IPv4/IPv6 library providing CIDR math. Parse, encode, and work with IP addresses and networks in a type-safe way on all Kotlin targets.

JsonPath4K

100% pure Kotlin Multiplatform (JVM, Android, iOS) library for working with JSON Paths as defined in RFC9535. It supports the function extensions specified in RFC9535 by default.

multi²_base

Kotlin multiplatform multibase encoder/decoder. This library is a port of Protocol Labs’ Kotlin/JVM multibase implementation. Its correctness verified against official test vectors.

Health

KMM DGC Library

Kotlin (JVM+JS) implementation of the HCERT/DCC specification. Create and verify Electronic Health Certificates used during the second half of the COVID pandemic.

Swift ValidationCore

Swift library for validating Electronic Health Certificates (HCERT) po­pu­larized during the second half of the COVID pandemic. An iOS demonstration application is available.

Other

KMM Result

100% pure Kotlin multiplatform result class. Drop-in replacement for Kotlin’s stdlib Result, but usable from Swift and Objective C. Maps from/to Result.

modulator

JVM-style compileOnly dependen­cies for KMP! No bloat, no dirty tricks, just clean, modular APIs, and full toolchain compatibility – forever!

Cashbox Democode

Java demo code for producing and verifying signed cashbox receipts compliant with the Austrian cashbox security regulation. Conceived in 2015. Apache-licensed; uses maven.

Gradle Conventions

Custom Gradle Plugin used for our projects. Currently, it supports JVM-only projects and Kotlin Multiplatform projects. Also works as an example on how this can be done in general.