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Make multiexp an optional, yet default, feature for DLEq

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This commit is contained in:
Luke Parker
2022-07-02 02:48:27 -04:00
parent 2e35854215
commit ed569ea9c8
2 changed files with 17 additions and 5 deletions
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16
crypto/dleq/src/cross_group/mod.rs
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@@ -12,7 +12,7 @@ use group::{ff::{Field, PrimeField, PrimeFieldBits}, prime::PrimeGroup};
use crate::Generators;
pub mod scalar;
use scalar::{scalar_normalize, scalar_convert};
use scalar::scalar_convert;
pub(crate) mod schnorr;
use schnorr::SchnorrPoK;
@@ -159,13 +159,23 @@ impl<G0: PrimeGroup, G1: PrimeGroup> DLEqProof<G0, G1>
commitments: impl Iterator<Item = G>
) -> G where G::Scalar: PrimeFieldBits {
let mut pow_2 = G::Scalar::one();
multiexp::multiexp_vartime(
#[cfg(feature = "multiexp")]
let res = multiexp::multiexp_vartime(
&commitments.map(|commitment| {
let res = (pow_2, commitment);
pow_2 = pow_2.double();
res
}).collect::<Vec<_>>()
)
);
#[cfg(not(feature = "multiexp"))]
let res = commitments.fold(G::identity(), |key, commitment| {
let res = key + (commitment * pow_2);
pow_2 = pow_2.double();
res
});
res
}
fn reconstruct_keys(&self) -> (G0, G1) {