/**
 * Copyright (c) 2018 Jun Kurihara
 * Copyright 2020 The Matrix.org Foundation C.I.C.
 *
 * MIT LICENSE, See https://github.com/junkurihara/jscu/blob/develop/packages/js-crypto-hkdf/LICENSE
 * Based on https://github.com/junkurihara/jscu/blob/develop/packages/js-crypto-hkdf/src/hkdf.ts
 */
import type { Crypto } from "../../platform/web/dom/Crypto.js";
export declare function hkdf(cryptoDriver: Crypto, key: Uint8Array, salt: Uint8Array, info: Uint8Array, hash: "SHA-256" | "SHA-512", length: number): Promise<Uint8Array>;