/// <reference types="node" />
import { JsonWebKey } from '../../../jwk/jsonwebkey';
import { JsonWebEncryptionContentEncryptionAlgorithm } from '../enc/jsonwebencryption-content-encryption.algorithm';
import { JsonWebEncryptionKeyWrapAlgorithm } from './jsonwebencryption-key-wrap.algorithm';
/**
 * Implementation of the JSON Web Encryption Direct Key Wrap Algorithm.
 *
 * @see https://www.rfc-editor.org/rfc/rfc7518.html#section-4.5
 */
declare class DirAlgorithm extends JsonWebEncryptionKeyWrapAlgorithm {
    /**
     * Instantiates a new JSON Web Encryption Direct Key Wrap Algorithm to Wrap and Unwrap Content Encryption Keys.
     */
    constructor();
    /**
     * Returns an empty Buffer as the Wrapped Key since the Algorithm does not Wrap the provided Content Encryption Key.
     *
     * @param enc JSON Web Encryption Content Encryption Algorithm.
     * @param key JSON Web Key to be used as the Content Encryption Key used to Encrypt the Plaintext.
     * @returns Wrap Key as the Content Encryption Key and an empty Buffer as the Wrapped Content Encryption Key.
     */
    wrap(enc: JsonWebEncryptionContentEncryptionAlgorithm, key: JsonWebKey): Promise<[Buffer, Buffer]>;
    /**
     * Returns the provided JSON Web Key as the Content Encryption Key.
     *
     * @param enc JSON Web Encryption Content Encryption Algorithm.
     * @param key JSON Web Key used as the Content Encryption Key.
     * @param ek ~Wrapped Content Encryption Key~.
     * @returns Provided JSON Web Key as the Content Encryption Key.
     */
    unwrap(enc: JsonWebEncryptionContentEncryptionAlgorithm, key: JsonWebKey, ek: Buffer): Promise<Buffer>;
}
/**
 * Direct use of a shared symmetric key as the CEK.
 */
export declare const dir: DirAlgorithm;
export {};