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secret_to_public fn

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This commit is contained in:
Nicholas Ward 2022-02-24 10:01:38 -08:00
parent 517d26e4c1
commit 383b8b68b3
1 changed files with 7 additions and 4 deletions
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11
plonky2/src/curve/ecdsa.rs
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@ -16,6 +16,10 @@ pub struct ECDSASecretKey<C: Curve>(pub C::ScalarField);
#[derive(Copy, Clone, Debug, Deserialize, Eq, Hash, PartialEq, Serialize)]
pub struct ECDSAPublicKey<C: Curve>(pub AffinePoint<C>);
pub fn secret_to_public<C: Curve>(sk: ECDSASecretKey<C>) -> ECDSAPublicKey<C> {
ECDSAPublicKey((CurveScalar(sk.0) * C::GENERATOR_PROJECTIVE).to_affine())
}
pub fn sign_message<C: Curve>(msg: C::ScalarField, sk: ECDSASecretKey<C>) -> ECDSASignature<C> {
let (k, rr) = {
let mut k = C::ScalarField::rand();
@ -57,8 +61,7 @@ pub fn verify_message<C: Curve>(
#[cfg(test)]
mod tests {
use crate::curve::curve_types::{Curve, CurveScalar};
use crate::curve::ecdsa::{sign_message, verify_message, ECDSAPublicKey, ECDSASecretKey};
use crate::curve::ecdsa::{secret_to_public, sign_message, verify_message, ECDSASecretKey};
use crate::curve::secp256k1::Secp256K1;
use crate::field::field_types::Field;
use crate::field::secp256k1_scalar::Secp256K1Scalar;
@ -68,8 +71,8 @@ mod tests {
type C = Secp256K1;
let msg = Secp256K1Scalar::rand();
let sk = ECDSASecretKey(Secp256K1Scalar::rand());
let pk = ECDSAPublicKey((CurveScalar(sk.0) * C::GENERATOR_PROJECTIVE).to_affine());
let sk = ECDSASecretKey::<C>(Secp256K1Scalar::rand());
let pk = secret_to_public(sk);
let sig = sign_message(msg, sk);
let result = verify_message(msg, sig, pk);