mirror of
https://github.com/serai-dex/serai.git
synced 2025-12-08 12:19:24 +00:00
38 lines
1.2 KiB
Rust
38 lines
1.2 KiB
Rust
use zeroize::Zeroize;
|
|
|
|
use crypto_bigint::{U512, U1024};
|
|
|
|
use crate::field;
|
|
|
|
/// Ed448 field element.
|
|
#[derive(Clone, Copy, PartialEq, Eq, Default, Debug, Zeroize)]
|
|
pub struct FieldElement(pub(crate) U512);
|
|
|
|
// 2**448 - 2**224 - 1
|
|
pub(crate) const MODULUS: FieldElement = FieldElement(U512::from_be_hex(concat!(
|
|
"00000000000000",
|
|
"00",
|
|
"fffffffffffffffffffffffffffffffffffffffffffffffffffffffe",
|
|
"ffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
|
|
)));
|
|
|
|
const WIDE_MODULUS: U1024 = U1024::from_be_hex(concat!(
|
|
"0000000000000000000000000000000000000000000000000000000000000000",
|
|
"0000000000000000000000000000000000000000000000000000000000000000",
|
|
"00000000000000",
|
|
"00",
|
|
"fffffffffffffffffffffffffffffffffffffffffffffffffffffffe",
|
|
"ffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
|
|
));
|
|
|
|
pub(crate) const Q_4: FieldElement =
|
|
FieldElement(MODULUS.0.saturating_add(&U512::ONE).wrapping_div(&U512::from_u8(4)));
|
|
|
|
field!(FieldElement, MODULUS, WIDE_MODULUS, 448);
|
|
|
|
#[test]
|
|
fn test_field() {
|
|
// TODO: Move to test_prime_field_bits once the impl is finished
|
|
ff_group_tests::prime_field::test_prime_field::<_, FieldElement>(&mut rand_core::OsRng);
|
|
}
|