You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
57 lines
2.5 KiB
57 lines
2.5 KiB
/*! noble-curves - MIT License (c) 2022 Paul Miller (paulmillr.com) */ |
|
import type { Group, GroupConstructor, AffinePoint } from './curve.js'; |
|
import { IField } from './modular.js'; |
|
import { CHash } from './utils.js'; |
|
/** |
|
* * `DST` is a domain separation tag, defined in section 2.2.5 |
|
* * `p` characteristic of F, where F is a finite field of characteristic p and order q = p^m |
|
* * `m` is extension degree (1 for prime fields) |
|
* * `k` is the target security target in bits (e.g. 128), from section 5.1 |
|
* * `expand` is `xmd` (SHA2, SHA3, BLAKE) or `xof` (SHAKE, BLAKE-XOF) |
|
* * `hash` conforming to `utils.CHash` interface, with `outputLen` / `blockLen` props |
|
*/ |
|
type UnicodeOrBytes = string | Uint8Array; |
|
export type Opts = { |
|
DST: UnicodeOrBytes; |
|
p: bigint; |
|
m: number; |
|
k: number; |
|
expand: 'xmd' | 'xof'; |
|
hash: CHash; |
|
}; |
|
export declare function expand_message_xmd(msg: Uint8Array, DST: Uint8Array, lenInBytes: number, H: CHash): Uint8Array; |
|
export declare function expand_message_xof(msg: Uint8Array, DST: Uint8Array, lenInBytes: number, k: number, H: CHash): Uint8Array; |
|
/** |
|
* Hashes arbitrary-length byte strings to a list of one or more elements of a finite field F |
|
* https://www.rfc-editor.org/rfc/rfc9380#section-5.2 |
|
* @param msg a byte string containing the message to hash |
|
* @param count the number of elements of F to output |
|
* @param options `{DST: string, p: bigint, m: number, k: number, expand: 'xmd' | 'xof', hash: H}`, see above |
|
* @returns [u_0, ..., u_(count - 1)], a list of field elements. |
|
*/ |
|
export declare function hash_to_field(msg: Uint8Array, count: number, options: Opts): bigint[][]; |
|
export declare function isogenyMap<T, F extends IField<T>>(field: F, map: [T[], T[], T[], T[]]): (x: T, y: T) => { |
|
x: T; |
|
y: T; |
|
}; |
|
export interface H2CPoint<T> extends Group<H2CPoint<T>> { |
|
add(rhs: H2CPoint<T>): H2CPoint<T>; |
|
toAffine(iz?: bigint): AffinePoint<T>; |
|
clearCofactor(): H2CPoint<T>; |
|
assertValidity(): void; |
|
} |
|
export interface H2CPointConstructor<T> extends GroupConstructor<H2CPoint<T>> { |
|
fromAffine(ap: AffinePoint<T>): H2CPoint<T>; |
|
} |
|
export type MapToCurve<T> = (scalar: bigint[]) => AffinePoint<T>; |
|
export type htfBasicOpts = { |
|
DST: UnicodeOrBytes; |
|
}; |
|
export declare function createHasher<T>(Point: H2CPointConstructor<T>, mapToCurve: MapToCurve<T>, def: Opts & { |
|
encodeDST?: UnicodeOrBytes; |
|
}): { |
|
hashToCurve(msg: Uint8Array, options?: htfBasicOpts): H2CPoint<T>; |
|
encodeToCurve(msg: Uint8Array, options?: htfBasicOpts): H2CPoint<T>; |
|
}; |
|
export {}; |
|
//# sourceMappingURL=hash-to-curve.d.ts.map
|