absolutebi/serai
1
0
Fork 0
mirror of https://github.com/serai-dex/serai.git synced 2025-12-08 20:29:23 +00:00
Code Issues Packages Projects Releases Wiki Activity

Transcript crate with both a merlin backend and a basic label len value backend

Browse Source 
Moves binding factor/seeded RNGs over to the transcripts.
This commit is contained in:
Luke Parker
2022-05-03 07:20:24 -04:00
parent 87f38cafe4
commit bf257b3a1f
19 changed files with 282 additions and 129 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
crypto/frost/src/algorithm.rs
View File

@@ -4,16 +4,16 @@ use rand_core::{RngCore, CryptoRng};
use group::Group;
use transcript::{Transcript, DigestTranscript};
use crate::{Curve, FrostError, MultisigView};
/// Algorithm to use FROST with
pub trait Algorithm<C: Curve>: Clone {
type Transcript: Transcript + Clone + Debug;
/// The resulting type of the signatures this algorithm will produce
type Signature: Clone + Debug;
/// The amount of bytes from each participant's addendum to commit to
fn addendum_commit_len() -> usize;
/// Generate an addendum to FROST"s preprocessing stage
fn preprocess_addendum<R: RngCore + CryptoRng>(
rng: &mut R,
@@ -30,8 +30,8 @@ pub trait Algorithm<C: Curve>: Clone {
serialized: &[u8],
) -> Result<(), FrostError>;
/// Context for this algorithm to be hashed into b, and therefore committed to
fn context(&self) -> Vec<u8>;
/// Transcript for this algorithm to be used to create the binding factor
fn transcript(&self) -> Option<Self::Transcript>;
/// Sign a share with the given secret/nonce
/// The secret will already have been its lagrange coefficient applied so it is the necessary
@@ -90,12 +90,11 @@ pub struct SchnorrSignature<C: Curve> {
/// Implementation of Schnorr signatures for use with FROST
impl<C: Curve, H: Hram<C>> Algorithm<C> for Schnorr<C, H> {
// Specify a firm type which either won't matter as it won't be used or will be used (offset) and
// is accordingly solid
type Transcript = DigestTranscript::<blake2::Blake2b512>;
type Signature = SchnorrSignature<C>;
fn addendum_commit_len() -> usize {
0
}
fn preprocess_addendum<R: RngCore + CryptoRng>(
_: &mut R,
_: &MultisigView<C>,
@@ -114,8 +113,8 @@ impl<C: Curve, H: Hram<C>> Algorithm<C> for Schnorr<C, H> {
Ok(())
}
fn context(&self) -> Vec<u8> {
vec![]
fn transcript(&self) -> Option<DigestTranscript::<blake2::Blake2b512>> {
None
}
fn sign_share(