70 lines
2.2 KiB
TypeScript
70 lines
2.2 KiB
TypeScript
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/*! noble-curves - MIT License (c) 2022 Paul Miller (paulmillr.com) */
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import { IField } from './modular.js';
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export type AffinePoint<T> = {
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x: T;
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y: T;
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} & {
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z?: never;
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t?: never;
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};
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export interface Group<T extends Group<T>> {
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double(): T;
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negate(): T;
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add(other: T): T;
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subtract(other: T): T;
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equals(other: T): boolean;
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multiply(scalar: bigint): T;
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}
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export type GroupConstructor<T> = {
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BASE: T;
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ZERO: T;
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};
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export type Mapper<T> = (i: T[]) => T[];
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export declare function wNAF<T extends Group<T>>(c: GroupConstructor<T>, bits: number): {
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constTimeNegate: (condition: boolean, item: T) => T;
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unsafeLadder(elm: T, n: bigint): T;
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/**
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* Creates a wNAF precomputation window. Used for caching.
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* Default window size is set by `utils.precompute()` and is equal to 8.
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* Number of precomputed points depends on the curve size:
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* 2^(𝑊−1) * (Math.ceil(𝑛 / 𝑊) + 1), where:
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* - 𝑊 is the window size
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* - 𝑛 is the bitlength of the curve order.
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* For a 256-bit curve and window size 8, the number of precomputed points is 128 * 33 = 4224.
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* @returns precomputed point tables flattened to a single array
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*/
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precomputeWindow(elm: T, W: number): Group<T>[];
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/**
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* Implements ec multiplication using precomputed tables and w-ary non-adjacent form.
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* @param W window size
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* @param precomputes precomputed tables
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* @param n scalar (we don't check here, but should be less than curve order)
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* @returns real and fake (for const-time) points
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*/
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wNAF(W: number, precomputes: T[], n: bigint): {
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p: T;
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f: T;
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};
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wNAFCached(P: T, precomputesMap: Map<T, T[]>, n: bigint, transform: Mapper<T>): {
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p: T;
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f: T;
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};
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};
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export type BasicCurve<T> = {
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Fp: IField<T>;
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n: bigint;
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nBitLength?: number;
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nByteLength?: number;
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h: bigint;
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hEff?: bigint;
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Gx: T;
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Gy: T;
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allowInfinityPoint?: boolean;
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};
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export declare function validateBasic<FP, T>(curve: BasicCurve<FP> & T): Readonly<{
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readonly nBitLength: number;
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readonly nByteLength: number;
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} & BasicCurve<FP> & T & {
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p: bigint;
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}>;
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//# sourceMappingURL=curve.d.ts.map
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