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Implement eVRF traits, all the way up to the DKG, for secp256k1/ed25519

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This commit is contained in:
Luke Parker
2024-07-28 15:20:52 -04:00
parent 681010f422
commit a6775d7dc5
13 changed files with 118 additions and 17 deletions
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5
crypto/dkg/Cargo.toml
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@@ -46,6 +46,9 @@ ec-divisors = { path = "../evrf/divisors", default-features = false, optional =
generalized-bulletproofs-circuit-abstraction = { path = "../evrf/circuit-abstraction", optional = true }
generalized-bulletproofs-ec-gadgets = { path = "../evrf/ec-gadgets", optional = true }
secq256k1 = { path = "../evrf/secq256k1", optional = true }
embedwards25519 = { path = "../evrf/embedwards25519", optional = true }
[dev-dependencies]
rand_core = { version = "0.6", default-features = false, features = ["getrandom"] }
rand = { version = "0.8", default-features = false, features = ["std"] }
@@ -90,5 +93,7 @@ evrf = [
"dep:generalized-bulletproofs-circuit-abstraction",
"dep:generalized-bulletproofs-ec-gadgets",
]
evrf-secp256k1 = ["evrf", "ciphersuite/secp256k1", "secq256k1"]
evrf-ed25519 = ["evrf", "ciphersuite/ed25519", "embedwards25519"]
tests = ["rand_core/getrandom"]
default = ["std"]

13
crypto/dkg/src/evrf/proof.rs
View File

@@ -33,6 +33,18 @@ pub trait EvrfCurve: Ciphersuite {
type EmbeddedCurveParameters: DiscreteLogParameters;
}
#[cfg(feature = "evrf-secp256k1")]
impl EvrfCurve for ciphersuite::Secp256k1 {
type EmbeddedCurve = secq256k1::Secq256k1;
type EmbeddedCurveParameters = secq256k1::Secq256k1;
}
#[cfg(feature = "evrf-ed25519")]
impl EvrfCurve for ciphersuite::Ed25519 {
type EmbeddedCurve = embedwards25519::Embedwards25519;
type EmbeddedCurveParameters = embedwards25519::Embedwards25519;
}
fn sample_point<C: Ciphersuite>(rng: &mut (impl RngCore + CryptoRng)) -> C::G {
let mut repr = <C::G as GroupEncoding>::Repr::default();
loop {
@@ -742,7 +754,6 @@ where
})
}
// TODO: Dedicated error
/// Verify an eVRF proof, returning the commitments output.
#[allow(clippy::too_many_arguments)]
pub(crate) fn verify(