IntegrityChain: FIPS 204 Module-Lattice-Based Digital Signature Standard

FIPS 204 (Initial Public Draft) Module-Lattice-Based Digital Signature Standard written in pure Rust for server, desktop, browser and embedded applications.

This crate implements the FIPS 204 draft standard in pure Rust with minimal and mainstream dependencies. All three security parameter sets are fully functional. The implementation does not require the standard library, e.g. #[no_std], has no heap allocations, e.g. no alloc needed, and exposes the RNG so it is suitable for the full range of applications down to the bare-metal. The API is stabilized and the code is heavily biased towards safety and correctness; further performance optimizations will be implemented as the standard matures. This crate will quickly follow any changes to FIPS 204 as they become available.

See https://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.204.ipd.pdf for a full description of the target functionality.

The functionality is extremely simple to use, as demonstrated by the following example.

// Use the desired target parameter set.
use fips204::ml_dsa_44; // Could also be ml_dsa_65 or ml_dsa_87. 
use fips204::traits::{SerDes, Signer, Verifier};
# use std::error::Error;
#
# fn main() -> Result<(), Box<dyn Error>> {

let message = [0u8, 1, 2, 3, 4, 5, 6, 7];

// Generate key pair and signature
let (pk1, sk) = ml_dsa_44::try_keygen_vt()?;  // Generate both public and secret keys
let sig = sk.try_sign_ct(&message)?;  // Use the secret key to generate a message signature

// Serialize then send the public key, message and signature
let (pk_send, msg_send, sig_send) = (pk1.into_bytes(), message, sig);
let (pk_recv, msg_recv, sig_recv) = (pk_send, msg_send, sig_send);

// Deserialize the public key and signature, then verify the message
let pk2 = ml_dsa_44::PublicKey::try_from_bytes(pk_recv)?;
let v = pk2.try_verify_vt(&msg_recv, &sig_recv)?; // Use the public to verify message signature
assert!(v); 
# Ok(())
# }

The Rust Documentation lives under each Module corresponding to the desired security parameter below.

Notes

• This crate is fully functional and corresponds to the first initial public draft of FIPS 204.
• Constant-time assurances target the source-code level only, and are a work in progress.
• Note that FIPS 204 places specific requirements on randomness per section 3.5.1, hence the exposed RNG.
• Requires Rust 1.70 or higher. The minimum supported Rust version may be changed in the future, but it will be done with a minor version bump.
• All on-by-default features of this library are covered by SemVer.
• This software is experimental and still under active development -- USE AT YOUR OWN RISK!
• Code repository contains extensive examples related to benchmarking, fuzzing, CT checks, embedded HW, and WASM use.

License

Contents are licensed under either the Apache License, Version 2.0 or MIT license at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.