M bls12_381/src/curves/g1.rs → bls12_381/src/curves/g1.rs

@@ -5,7 +5,7 @@ models::CurveConfig,
     short_weierstrass::{Affine, SWCurveConfig},
     AffineCurve, ProjectiveCurve,
 };
-use ark_ff::{biginteger::BigInteger256, Field, MontFp, Zero};
+use ark_ff::{Field, MontFp, Zero};
 use ark_std::ops::Neg;
 
 use crate::*;
@@ -50,17 +50,15 @@ // Algorithm from Section 6 of https://eprint.iacr.org/2021/1130.
         //
         // Check that endomorphism_p(P) == -[X^2]P
 
-        let x = BigInteger256::new([crate::Parameters::X[0], 0, 0, 0]);
-
         // An early-out optimization described in Section 6.
         // If uP == P but P != point of infinity, then the point is not in the right
         // subgroup.
-        let x_times_p = p.mul(x);
+        let x_times_p = p.mul_bigint(crate::Parameters::X);
         if x_times_p.eq(p) && !p.infinity {
             return false;
         }
 
-        let minus_x_squared_times_p = x_times_p.mul(x).neg();
+        let minus_x_squared_times_p = x_times_p.mul_bigint(crate::Parameters::X).neg();
         let endomorphism_p = endomorphism(p);
         minus_x_squared_times_p.eq(&endomorphism_p)
     }

M bls12_381/src/curves/g2.rs → bls12_381/src/curves/g2.rs

@@ -5,7 +5,7 @@ models::CurveConfig,
     short_weierstrass::{Affine, SWCurveConfig},
     AffineCurve,
 };
-use ark_ff::{BigInt, Field, MontFp, Zero};
+use ark_ff::{Field, MontFp, Zero};
 
 use crate::*;
 
@@ -60,7 +60,7 @@ // Algorithm from Section 4 of https://eprint.iacr.org/2021/1130.
         //
         // Checks that [p]P = [X]P
 
-        let mut x_times_point = point.mul(BigInt::new([crate::Parameters::X[0], 0, 0, 0]));
+        let mut x_times_point = point.mul_bigint(crate::Parameters::X);
         if crate::Parameters::X_IS_NEGATIVE {
             x_times_point = -x_times_point;
         }

M bls12_381/src/curves/tests.rs → bls12_381/src/curves/tests.rs

@@ -39,7 +39,11 @@ let x = Fq::rand(&mut rng);
         let greatest = rng.gen();
 
         if let Some(p) = G1Affine::get_point_from_x(x, greatest) {
-            if !p.into_projective().mul(Fr::characteristic()).is_zero() {
+            if !p
+                .into_projective()
+                .mul_bigint(Fr::characteristic())
+                .is_zero()
+            {
                 assert!(!p.is_in_correct_subgroup_assuming_on_curve());
                 return;
             }
@@ -62,7 +66,11 @@ let x = Fq2::rand(&mut rng);
         let greatest = rng.gen();
 
         if let Some(p) = G2Affine::get_point_from_x(x, greatest) {
-            if !p.into_projective().mul(Fr::characteristic()).is_zero() {
+            if !p
+                .into_projective()
+                .mul_bigint(Fr::characteristic())
+                .is_zero()
+            {
                 assert!(!p.is_in_correct_subgroup_assuming_on_curve());
                 return;
             }

M cp6_782/src/curves/mod.rs → cp6_782/src/curves/mod.rs

@@ -2,7 +2,7 @@ use ark_ec::{models::short_weierstrass::SWCurveConfig, PairingEngine};
 use ark_ff::{
     biginteger::BigInteger832,
     fields::{BitIteratorBE, Field},
-    BigInt, One,
+    BigInt, CyclotomicMultSubgroup, One,
 };
 
 use crate::{Fq, Fq3, Fq6, Fr};