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Fully document crypto/

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This commit is contained in:
Luke Parker
2023-03-20 20:10:00 -04:00
parent e1bb2c191b
commit 8d4d630e0f
45 changed files with 335 additions and 208 deletions
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6
crypto/ed448/src/scalar.rs
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@@ -2,13 +2,14 @@ use zeroize::Zeroize;
use crypto_bigint::{U512, U1024};
pub use crate::field;
use crate::field;
/// Ed448 Scalar field element.
#[derive(Clone, Copy, PartialEq, Eq, Default, Debug, Zeroize)]
pub struct Scalar(pub(crate) U512);
// 2**446 - 13818066809895115352007386748515426880336692474882178609894547503885
pub const MODULUS: Scalar = Scalar(U512::from_be_hex(concat!(
pub(crate) const MODULUS: Scalar = Scalar(U512::from_be_hex(concat!(
"00000000000000",
"00",
"3fffffffffffffffffffffffffffffffffffffffffffffffffffffff",
@@ -27,6 +28,7 @@ const WIDE_MODULUS: U1024 = U1024::from_be_hex(concat!(
field!(Scalar, MODULUS, WIDE_MODULUS, 446);
impl Scalar {
/// Perform a wide reduction to obtain a non-biased Scalar.
pub fn wide_reduce(bytes: [u8; 114]) -> Scalar {
Scalar(reduce(U1024::from_le_slice(&[bytes.as_ref(), &[0; 14]].concat())))
}