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ecdsa changes

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This commit is contained in:
Nicholas Ward 2022-01-29 07:54:55 -08:00
parent c1b8515e48
commit 30f936c434
1 changed files with 10 additions and 2 deletions
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12
plonky2/src/curve/ecdsa.rs
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@ -1,3 +1,4 @@
use crate::curve::curve_msm::msm_parallel;
use crate::curve::curve_types::{base_to_scalar, AffinePoint, Curve, CurveScalar};
use crate::field::field_types::Field;
@ -10,8 +11,15 @@ pub struct ECDSASecretKey<C: Curve>(pub C::ScalarField);
pub struct ECDSAPublicKey<C: Curve>(pub AffinePoint<C>);
pub fn sign_message<C: Curve>(msg: C::ScalarField, sk: ECDSASecretKey<C>) -> ECDSASignature<C> {
let k = C::ScalarField::rand();
let rr = (CurveScalar(k) * C::GENERATOR_PROJECTIVE).to_affine();
let (k, rr) = {
let mut k = C::ScalarField::rand();
let mut rr = (CurveScalar(k) * C::GENERATOR_PROJECTIVE).to_affine();
while rr.x == C::BaseField::ZERO {
k = C::ScalarField::rand();
rr = (CurveScalar(k) * C::GENERATOR_PROJECTIVE).to_affine();
}
(k, rr)
};
let r = base_to_scalar::<C>(rr.x);
let s = k.inverse() * (msg + r * sk.0);