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Просмотр файла: ed448.d.ts
import type { AffinePoint, Group } from './abstract/curve.js';
import { type CurveFn, type ExtPointType } from './abstract/edwards.js';
import { type htfBasicOpts, type HTFMethod } from './abstract/hash-to-curve.js';
import { type CurveFn as XCurveFn } from './abstract/montgomery.js';
import { type Hex } from './abstract/utils.js';
/**
* ed448 EdDSA curve and methods.
* @example
* import { ed448 } from '@noble/curves/ed448';
* const priv = ed448.utils.randomPrivateKey();
* const pub = ed448.getPublicKey(priv);
* const msg = new TextEncoder().encode('whatsup');
* const sig = ed448.sign(msg, priv);
* ed448.verify(sig, msg, pub);
*/
export declare const ed448: CurveFn;
export declare const ed448ph: CurveFn;
/**
* ECDH using curve448 aka x448.
*/
export declare const x448: XCurveFn;
/**
* Converts edwards448 public key to x448 public key. Uses formula:
* * `(u, v) = ((y-1)/(y+1), sqrt(156324)*u/x)`
* * `(x, y) = (sqrt(156324)*u/v, (1+u)/(1-u))`
* @example
* const aPub = ed448.getPublicKey(utils.randomPrivateKey());
* x448.getSharedSecret(edwardsToMontgomery(aPub), edwardsToMontgomery(someonesPub))
*/
export declare function edwardsToMontgomeryPub(edwardsPub: string | Uint8Array): Uint8Array;
export declare const edwardsToMontgomery: typeof edwardsToMontgomeryPub;
export declare const hashToCurve: HTFMethod<bigint>;
export declare const encodeToCurve: HTFMethod<bigint>;
type ExtendedPoint = ExtPointType;
/**
* Each ed448/ExtendedPoint has 4 different equivalent points. This can be
* a source of bugs for protocols like ring signatures. Decaf was created to solve this.
* Decaf point operates in X:Y:Z:T extended coordinates like ExtendedPoint,
* but it should work in its own namespace: do not combine those two.
* https://datatracker.ietf.org/doc/html/draft-irtf-cfrg-ristretto255-decaf448
*/
declare class DcfPoint implements Group<DcfPoint> {
private readonly ep;
static BASE: DcfPoint;
static ZERO: DcfPoint;
constructor(ep: ExtendedPoint);
static fromAffine(ap: AffinePoint<bigint>): DcfPoint;
/**
* Takes uniform output of 112-byte hash function like shake256 and converts it to `DecafPoint`.
* The hash-to-group operation applies Elligator twice and adds the results.
* **Note:** this is one-way map, there is no conversion from point to hash.
* https://datatracker.ietf.org/doc/html/draft-irtf-cfrg-ristretto255-decaf448-07#name-element-derivation-2
* @param hex 112-byte output of a hash function
*/
static hashToCurve(hex: Hex): DcfPoint;
/**
* Converts decaf-encoded string to decaf point.
* https://datatracker.ietf.org/doc/html/draft-irtf-cfrg-ristretto255-decaf448-07#name-decode-2
* @param hex Decaf-encoded 56 bytes. Not every 56-byte string is valid decaf encoding
*/
static fromHex(hex: Hex): DcfPoint;
static msm(points: DcfPoint[], scalars: bigint[]): DcfPoint;
/**
* Encodes decaf point to Uint8Array.
* https://datatracker.ietf.org/doc/html/draft-irtf-cfrg-ristretto255-decaf448-07#name-encode-2
*/
toRawBytes(): Uint8Array;
toHex(): string;
toString(): string;
equals(other: DcfPoint): boolean;
add(other: DcfPoint): DcfPoint;
subtract(other: DcfPoint): DcfPoint;
multiply(scalar: bigint): DcfPoint;
multiplyUnsafe(scalar: bigint): DcfPoint;
double(): DcfPoint;
negate(): DcfPoint;
}
export declare const DecafPoint: typeof DcfPoint;
export declare const hashToDecaf448: (msg: Uint8Array, options: htfBasicOpts) => DcfPoint;
export declare const hash_to_decaf448: typeof hashToDecaf448;
export {};
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