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Remove crypto-bigint from the public API of prime-field

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This commit is contained in:
Luke Parker
2025-09-03 06:41:42 -04:00
parent 974bc82387
commit 41c34d7f11
6 changed files with 101 additions and 24 deletions
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42
crypto/ed448/src/point.rs
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@@ -7,8 +7,8 @@ use prime_field::{
subtle::{Choice, CtOption, ConstantTimeEq, ConditionallySelectable, ConditionallyNegatable},
zeroize::Zeroize,
rand_core::RngCore,
crypto_bigint::U512,
};
use crypto_bigint::U512;
use ciphersuite::group::{
ff::{Field, PrimeField, PrimeFieldBits},
@@ -18,17 +18,37 @@ use ciphersuite::group::{
use crate::{u8_from_bool, Scalar, FieldElement};
const G_Y: FieldElement = FieldElement::from(&U512::from_be_hex(concat!(
"0000000000000000",
"693f46716eb6bc248876203756c9c7624bea73736ca3984087789c1e",
"05a0c2d73ad3ff1ce67c39c4fdbd132c4ed7c8ad9808795bf230fa14",
)));
const G_Y: FieldElement = {
let bytes = U512::from_be_hex(concat!(
"0000000000000000",
"693f46716eb6bc248876203756c9c7624bea73736ca3984087789c1e",
"05a0c2d73ad3ff1ce67c39c4fdbd132c4ed7c8ad9808795bf230fa14",
))
.to_le_bytes();
let mut dest = [0; 57];
let mut i = 0;
while i < dest.len() {
dest[i] = bytes[i];
i += 1;
}
FieldElement::from_bytes(&dest).unwrap()
};
const G_X: FieldElement = FieldElement::from(&U512::from_be_hex(concat!(
"0000000000000000",
"4f1970c66bed0ded221d15a622bf36da9e146570470f1767ea6de324",
"a3d3a46412ae1af72ab66511433b80e18b00938e2626a82bc70cc05e",
)));
const G_X: FieldElement = {
let bytes = U512::from_be_hex(concat!(
"0000000000000000",
"4f1970c66bed0ded221d15a622bf36da9e146570470f1767ea6de324",
"a3d3a46412ae1af72ab66511433b80e18b00938e2626a82bc70cc05e",
))
.to_le_bytes();
let mut dest = [0; 57];
let mut i = 0;
while i < dest.len() {
dest[i] = bytes[i];
i += 1;
}
FieldElement::from_bytes(&dest).unwrap()
};
fn recover_x(y: FieldElement) -> CtOption<FieldElement> {
#[allow(non_snake_case)]