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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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3
crypto/ed448/Cargo.toml
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@@ -21,6 +21,7 @@ zeroize = { version = "1", default-features = false, features = ["zeroize_derive
sha3 = { version = "0.11.0-rc.0", default-features = false }
crypto-bigint = { version = "0.6", default-features = false, features = ["zeroize"] }
prime-field = { path = "../prime-field", default-features = false }
ciphersuite = { path = "../ciphersuite", default-features = false }
@@ -32,6 +33,6 @@ rand_core = { version = "0.6", default-features = false, features = ["std"] }
ff-group-tests = { path = "../ff-group-tests" }
[features]
alloc = ["zeroize/alloc", "sha3/alloc", "prime-field/alloc", "ciphersuite/alloc"]
alloc = ["zeroize/alloc", "sha3/alloc", "crypto-bigint/alloc", "prime-field/alloc", "ciphersuite/alloc"]
std = ["alloc", "zeroize/std", "prime-field/std", "ciphersuite/std"]
default = ["std"]

42
crypto/ed448/src/point.rs
View File

@@ -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)]