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group: Rewrite wNAF to remove dependency on ff::PrimeFieldRepr

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Adapted from Scalar::non_adjacent_form in curve25519-dalek.
This commit is contained in:
Jack Grigg
2020-03-26 19:23:29 +13:00
parent 6e53cf3c4c
commit 69c60530d4
4 changed files with 78 additions and 48 deletions
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14
bellman/src/groth16/generator.rs
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@@ -2,7 +2,7 @@ use rand_core::RngCore;
use std::ops::{AddAssign, MulAssign};
use std::sync::Arc;
use ff::{Field, PrimeField};
use ff::Field;
use group::{CurveAffine, CurveProjective, Wnaf};
use pairing::Engine;
@@ -273,7 +273,7 @@ where
exp.mul_assign(&coeff);
// Exponentiate
*h = g1_wnaf.scalar(exp.into_repr());
*h = g1_wnaf.scalar(&exp);
}
// Batch normalize
@@ -376,14 +376,14 @@ where
// Compute A query (in G1)
if !at.is_zero() {
*a = g1_wnaf.scalar(at.into_repr());
*a = g1_wnaf.scalar(&at);
}
// Compute B query (in G1/G2)
if !bt.is_zero() {
let bt_repr = bt.into_repr();
*b_g1 = g1_wnaf.scalar(bt_repr);
*b_g2 = g2_wnaf.scalar(bt_repr);
();
*b_g1 = g1_wnaf.scalar(&bt);
*b_g2 = g2_wnaf.scalar(&bt);
}
at.mul_assign(&beta);
@@ -394,7 +394,7 @@ where
e.add_assign(&ct);
e.mul_assign(inv);
*ext = g1_wnaf.scalar(e.into_repr());
*ext = g1_wnaf.scalar(&e);
}
// Batch normalize