bls

This is a Rust crate for making BLS (Boneh-Lynn-Shacham) signatures. It currently supports the BLS12-381 (Barreto-Lynn-Scott) (yes, I know) construction.

Documentation

Bring the bls crate into your project just as you normally would.

use bls::Keypair;
use pairing::bls12_381::Bls12;

let keypair = Keypair::<Bls12>::generate(&mut rng);
let message = "Some message";
let sig = keypair.sign(&message.as_bytes());
assert_eq!(keypair.verify(&message.as_bytes(), &sig), true);

Aggregate signatures

use bls::{AggregateSignature, Keypair};
use pairing::bls12_381::Bls12;

let mut inputs = Vec::new();
let mut asig = AggregateSignature::new();

let keypair1 = Keypair::<Bls12>::generate(&mut rng);
let message1 = "Some unique message";
let sig1 = keypair1.sign(&message1.as_bytes());
inputs.push((keypair1.public, message1));
asig.aggregate(&sig1);

let keypair2 = Keypair::<Bls12>::generate(&mut rng);
let message2 = "Some other unique message";
let sig2 = keypair2.sign(&message2.as_bytes());
inputs.push((keypair2.public, message2));
asig.aggregate(&sig2);

assert_eq!(
    asig.verify(&inputs.iter()
        .map(|&(ref pk, ref m)| (pk, m.as_bytes()))
        .collect()),
    true
);

Security Warnings

This library does not make any guarantees about constant-time operations, memory access patterns, or resistance to side-channel attacks.

License

Licensed under either of

• Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

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.