frost/frost-ristretto255/README.md

An implementation of Schnorr sigantures on the Ristretto group for both single and threshold numbers of signers (FROST).

In addition to the Signature, SigningKey, VerificationKey types, the library also provides VerificationKeyBytes, a refinement of a [u8; 32] indicating that bytes represent an encoding of averification key. This allows the VerificationKey type to cache verification checks related to the verification key encoding.

Examples

Creating a Signature with a single signer, serializing and deserializing it, and verifying the signature:

# use std::convert::TryFrom;
use rand::thread_rng;
use frost-ristretto255::*;

let msg = b"Hello!";

// Generate a secret key and sign the message
let sk = SigningKey::new(thread_rng());
let sig = sk.sign(thread_rng(), msg);

// Types can be converted to raw byte arrays using From/Into
let sig_bytes: [u8; 64] = sig.into();
let pk_bytes: [u8; 32] = VerificationKey::from(&sk).into();

// Deserialize and verify the signature.
let sig: Signature<Binding> = sig_bytes.into();
assert!(
    VerificationKey::try_from(pk_bytes)
        .and_then(|pk| pk.verify(msg, &sig))
        .is_ok()
);

docs

cargo doc --features "nightly" --open