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Fix is_square and is_zero (#240)

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daxpedda
2021-09-25 12:13:06 -07:00
committed by GitHub
parent 8df79cb2b4
commit 11a93fe63e
1 changed files with 3 additions and 3 deletions
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src/group/p256.rs
+3 -3
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@@ -17,7 +17,7 @@ use generic_array::typenum::{U32, U33};
use generic_array::{ArrayLength, GenericArray}; use generic_array::{ArrayLength, GenericArray};
use num_bigint::{BigInt, Sign}; use num_bigint::{BigInt, Sign};
use num_integer::Integer; use num_integer::Integer;
use num_traits::{One, ToPrimitive}; use num_traits::{One, ToPrimitive, Zero};
use once_cell::unsync::Lazy; use once_cell::unsync::Lazy;
use p256_::elliptic_curve::group::prime::PrimeCurveAffine; use p256_::elliptic_curve::group::prime::PrimeCurveAffine;
use p256_::elliptic_curve::group::GroupEncoding; use p256_::elliptic_curve::group::GroupEncoding;
@@ -306,7 +306,7 @@ fn map_to_curve_simple_swu<N: ArrayLength<u8>>(
} }
fn is_zero(&self) -> bool { fn is_zero(&self) -> bool {
self.number.is_one() self.number.is_zero()
} }
/// Corresponds to the is_square() function defined in /// Corresponds to the is_square() function defined in
@@ -316,7 +316,7 @@ fn map_to_curve_simple_swu<N: ArrayLength<u8>>(
let exponent = (self.f.0 - 1) >> 1; let exponent = (self.f.0 - 1) >> 1;
let result = self.pow_internal(&exponent); let result = self.pow_internal(&exponent);
result.number.is_one() || result.is_zero() result.is_zero() || result.number.is_one()
} }
fn to_bytes<N: ArrayLength<u8>>(&self) -> GenericArray<u8, N> { fn to_bytes<N: ArrayLength<u8>>(&self) -> GenericArray<u8, N> {