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ed448: rename to edwardsToMontgomeryPub

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Paul Miller 2023-04-23 18:29:17 +00:00
parent 895ee3a1a4
commit 63653255e1
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GPG Key ID: 697079DA6878B89B
1 changed files with 3 additions and 2 deletions
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src/ed448.ts
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@ -63,7 +63,7 @@ const ED448_DEF = {
d: BigInt(
'726838724295606890549323807888004534353641360687318060281490199180612328166730772686396383698676545930088884461843637361053498018326358'
),
// Finite field 𝔽p over which we'll do calculations; 2n ** 448n - 2n ** 224n - 1n
// Finite field 𝔽p over which we'll do calculations; 2n**448n - 2n**224n - 1n
Fp,
// Subgroup order: how many points curve has;
// 2n**446n - 13818066809895115352007386748515426880336692474882178609894547503885n
@ -146,11 +146,12 @@ export const x448 = montgomery({
* const aPub = ed448.getPublicKey(utils.randomPrivateKey());
* x448.getSharedSecret(edwardsToMontgomery(aPub), edwardsToMontgomery(someonesPub))
*/
export function edwardsToMontgomery(edwardsPub: string | Uint8Array): Uint8Array {
export function edwardsToMontgomeryPub(edwardsPub: string | Uint8Array): Uint8Array {
const { y } = ed448.ExtendedPoint.fromHex(edwardsPub);
const _1n = BigInt(1);
return Fp.toBytes(Fp.create((y - _1n) * Fp.inv(y + _1n)));
}
export const edwardsToMontgomery = edwardsToMontgomeryPub; // deprecated
// Hash To Curve Elligator2 Map
const ELL2_C1 = (Fp.ORDER - BigInt(3)) / BigInt(4); // 1. c1 = (q - 3) / 4 # Integer arithmetic