/// <reference types="node" />
import { Dict, Optional } from '@guarani/types';
import { SupportedJsonWebKeyAlgorithm } from '../../../jwk/algorithms/types/supported-jsonwebkey-algorithm';
import { JsonWebKey } from '../../../jwk/jsonwebkey';
import { JsonWebEncryptionContentEncryptionAlgorithm } from '../enc/jsonwebencryption-contentencryption.algorithm';
import { SupportedJsonWebEncryptionKeyWrapAlgorithm } from './types/supported-jsonwebencryption-keyencryption-algorithm';
import { WrappedKey } from './types/wrapped-key';
/**
 * Abstract Base Class for {@link https://www.rfc-editor.org/rfc/rfc7518.html#section-4 RFC 7518 Section 4}.
 *
 * All JSON Web Encryption Key Wrap Algorithms supported by Guarani **MUST** extend this base class
 * and implement its abstract methods.
 */
export declare abstract class JsonWebEncryptionKeyWrapAlgorithm {
    /**
     * Name of the JSON Web Encryption Key Wrap Algorithm.
     */
    protected readonly algorithm: SupportedJsonWebEncryptionKeyWrapAlgorithm;
    /**
     * Type of JSON Web Key supported by this JSON Web Encryption Key Wrap Algorithm.
     */
    protected readonly keyType: SupportedJsonWebKeyAlgorithm;
    /**
     * Instantiates a new JSON Web Encryption Key Wrap Algorithm to Wrap and Unwrap Content Encryption Keys.
     *
     * @param algorithm Name of the JSON Web Encryption Key Wrap Algorithm.
     * @param keyType Type of JSON Web Key supported by this JSON Web Encryption Key Wrap Algorithm.
     */
    constructor(algorithm: SupportedJsonWebEncryptionKeyWrapAlgorithm, keyType: SupportedJsonWebKeyAlgorithm);
    /**
     * Wraps the provided Content Encryption Key using the provide JSON Web Key.
     *
     * @param enc JSON Web Encryption Content Encryption Algorithm.
     * @param key JSON Web Key used to Wrap the provided Content Encryption Key.
     * @param header Optional JSON Web Encryption Header containing the additional Parameters.
     * @returns Wrapped Content Encryption Key and optional additional JSON Web Encryption Header Parameters.
     */
    abstract wrap(enc: JsonWebEncryptionContentEncryptionAlgorithm, key: JsonWebKey, header?: Optional<Dict>): Promise<WrappedKey<Dict>>;
    /**
     * Unwraps the provided Encrypted Key using the provided JSON Web Key.
     *
     * @param enc JSON Web Encrytpion Content Encryption Algorithm.
     * @param key JSON Web Key used to Unwrap the Wrapped Content Encryption Key.
     * @param ek Wrapped Content Encryption Key.
     * @param header Optional JSON Web Encryption Header containing the additional Parameters.
     * @returns Unwrapped Content Encryption Key.
     */
    abstract unwrap(enc: JsonWebEncryptionContentEncryptionAlgorithm, key: JsonWebKey, ek: Buffer, header?: Optional<Dict>): Promise<Buffer>;
    /**
     * Checks if the provided JSON Web Key can be used by the requesting JSON Web Encryption Key Wrap Algorithm.
     *
     * @param key JSON Web Key to be checked.
     * @throws {InvalidJsonWebKeyException} The provided JSON Web Key is invalid.
     */
    protected validateJsonWebKey(key: JsonWebKey): void;
}