Li₂utils

There is a significant lack of simple FIPS 204 (CRYSTALS-Dilithium) signature generators/verifiers. This simple toolset is written in Rust and contains two tools: li2sign and li2verify.

This is provided for your convenience, and contains no audit, assurance, or fitness for any purpose whatsoever.

This toolset relies completely on the great fips204 Rust library by the RustCrypto Developers, and uses ML‐DSA‐44 parameters.

li2sign

Usage: li2sign

Takes data from stdin and uses the private key from ./private_key.bin if present; otherwise, it generates a new private key and stores it in that file. Then, it signs the given data, and outputs the signature to stdout and the public key to stderr.

li2verify

Usage: li2verify <public_key_hex> <signature_hex>

Takes data from stdin and verifies it against public_key_hex and signature_hex.

Original author: Ville Sundell (with the help of generative AI), released in the public domain under CC0.