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crypto: P-256 base-point comb, odd representatives off the identity, faster P-256 field (parity item 8b) #1013

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Merged
Japabu merged 2 commits into from
Oct 22, 2026
+955 −106
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crypto: P-256 base-point comb, odd representatives off the identity, faster P-256 field (parity item 8b) #1013

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7a7aa26
crypto: a P-256 base-point comb, odd representatives, and a faster field
Japabu Oct 22, 2026
0193e43
crypto: review round 1 of the P-256 comb
Japabu Oct 22, 2026
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4 changes: 2 additions & 2 deletions lib/crypto/src/ecc.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -9,7 +9,7 @@ macro_rules! curve_api {
use crate::{
Error, Random,
hash::$hash,
nist::{$curve, Point, Scalar},
nist::{$curve, Curve, Point, Scalar},
secret::Secret,
};
pub struct PublicKey {
Expand Down Expand Up @@ -56,7 +56,7 @@ macro_rules! curve_api {
pub fn public_key(&self) -> PublicKey {
// The base point's multiple by a nonzero scalar below n
// is finite and on the curve.
let point = Point::base().mul(&self.0);
let point = <$curve as Curve<$limbs>>::base_mul(&self.0);
let mut encoded = [0; $encoded];
point.encode(&mut encoded).expect("nonzero prime-order scalar");
PublicKey { point, encoded }
Expand Down
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