Prerequisites

What you need to build and test the service. This applies to the current state of this repository; the build is verified with Rust 1.88.

For both forms

Rust through rustup, stable channel, edition 2021.
OpenSSL 3.5 or later. OpenSSL includes ML-DSA and ML-KEM starting with 3.5. The delivered packages are built with 3.6.0. OpenSSL 3.0 through 3.4, as shipped by many Linux distributions, isn't enough: every post-quantum request then fails with an error.
Python 3.8 or later, only for the check scripts in tools/.

L4Re form

The L4Re form doesn't need a separately installed OpenSSL. By default, it builds OpenSSL 3.5.4 from source. For that you need:

Host	Tools
Windows	Visual Studio 2022 or the Build Tools with the “Desktop development with C++” workload; Strawberry Perl. The Perl that ships with Git for Windows or MSYS2 won't work.
Linux	`gcc`, `make`, `perl`
Linux, aarch64 target	additionally `gcc-aarch64-linux-gnu` and `rustup target add aarch64-unknown-linux-gnu`

The first build compiles OpenSSL and therefore takes considerably longer than later builds.

To actually run on L4Re, you also need the L4Re SDK, a Rust target for L4Re, and your platform vendor's DataspaceEndpoint library; see Deployment forms compared.

Windows form

Visual Studio 2022 or the Build Tools with the “Desktop development with C++” workload.
A prebuilt OpenSSL 3.5 or later for Windows x64 with headers (include\) and libraries (lib\libcrypto.lib, lib\libssl.lib). A runtime-only installation that contains just DLLs isn't enough. For how to point the build at it, see Use your own OpenSSL build.

Next step

Build and test