/// <reference types="node" />
import * as crypto from 'crypto';
import { CryptoCipher, CipherMode, HashAlgorithm } from './types';
export declare const ACCESS: unique symbol;
export declare class Key {
    #private;
    constructor(access: typeof ACCESS, key: crypto.KeyObject);
    extract(access: typeof ACCESS): crypto.KeyObject;
}
export declare const HEADER: Buffer;
export declare function cipherChoice(input?: CryptoCipher, mode?: CipherMode): string;
export declare function hash(data: string | Uint8Array | Iterable<string | Uint8Array> | AsyncIterable<string | Uint8Array>, algorithm?: HashAlgorithm): Promise<Uint8Array>;
export declare function random(length: number): Promise<Uint8Array>;