absolutebi/serai
1
0
Fork 0
mirror of https://github.com/serai-dex/serai.git synced 2025-12-09 20:59:23 +00:00
Code Issues Packages Projects Releases Wiki Activity

Update to FROST v10

Browse Source 
Further expands documentation to near-completion.
This commit is contained in:
Luke Parker
2022-09-29 07:08:20 -04:00
parent 7870084b9e
commit 2b7c9378c0
16 changed files with 95 additions and 65 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
crypto/frost/src/algorithm.rs
View File

@@ -8,8 +8,10 @@ use transcript::Transcript;
use crate::{Curve, FrostError, FrostView, schnorr};
pub use schnorr::SchnorrSignature;
/// Algorithm to use FROST with.
/// Algorithm trait usable by the FROST signing machine to produce signatures..
pub trait Algorithm<C: Curve>: Clone {
/// The transcript format this algorithm uses. This likely should NOT be the IETF-compatible
/// transcript included in this crate.
type Transcript: Transcript + Clone + Debug;
/// The resulting type of the signatures this algorithm will produce.
type Signature: Clone + PartialEq + Debug;
@@ -58,7 +60,8 @@ pub trait Algorithm<C: Curve>: Clone {
fn verify_share(&self, verification_share: C::G, nonces: &[Vec<C::G>], share: C::F) -> bool;
}
// Transcript which will create an IETF compliant serialization for the binding factor
/// IETF-compliant transcript. This is incredibly naive and should not be used within larger
/// protocols.
#[derive(Clone, Debug)]
pub struct IetfTranscript(Vec<u8>);
impl Transcript for IetfTranscript {
@@ -83,13 +86,15 @@ impl Transcript for IetfTranscript {
}
}
/// HRAm usable by the included Schnorr signature algorithm to generate challenges.
pub trait Hram<C: Curve>: Clone {
/// HRAM function to generate a challenge.
/// HRAm function to generate a challenge.
/// H2 from the IETF draft, despite having a different argument set (not being pre-formatted).
#[allow(non_snake_case)]
fn hram(R: &C::G, A: &C::G, m: &[u8]) -> C::F;
}
/// IETF-compliant Schnorr signature algorithm ((R, s) where s = r + cx).
#[derive(Clone)]
pub struct Schnorr<C: Curve, H: Hram<C>> {
transcript: IetfTranscript,
@@ -109,7 +114,6 @@ impl<C: Curve, H: Hram<C>> Schnorr<C, H> {
}
}
/// Implementation of Schnorr signatures for use with FROST.
impl<C: Curve, H: Hram<C>> Algorithm<C> for Schnorr<C, H> {
type Transcript = IetfTranscript;
type Signature = SchnorrSignature<C>;