no-std

Testing jwt-compact Crate in no_std Env

This simple crate tests that jwt-compact builds and can be used in a no_std environment (namely, an ARM Cortex-M3 microcontroller). It requires a nightly toolchain. The release profile must be used to not overflow the available microcontroller flash memory.

Usage

Beside using a real microcontroller, the crate can be tested with qemu. In fact, Cargo is configured to run qemu when using cargo run.

1. Install a recent nightly Rust toolchain and the thumbv7m-none-eabi target for it.
2. Install qemu. In Linux, qemu is often included as a system package, so this step can be as simple as sudo apt-get install qemu-system-arm.
3. Compile and run the app on qemu using cd $crate_dir && cargo run --release, where $crate_dir is the directory containing this README. Switching to the crate directory is necessary to use the Cargo config, which sets up necessary rustc flags and the qemu wrapper for cargo run.

By default, the binary only tests the HS* algorithms. You may run the binary with --features ed25519 or --features rsa in order to test additional algorithms.