/// <reference types="node" />
import { JsonWebKey } from '../../jwk/jsonwebkey';
import { JsonWebSignatureAlgorithm } from './jsonwebsignature.algorithm';
/**
 * Implementation of the JSON Web Signature HMAC Algorithm.
 */
declare class HmacAlgorithm extends JsonWebSignatureAlgorithm {
    /**
     * Hash Algorithm used to Sign and Verify Messages.
     */
    protected readonly hash: string;
    /**
     * Size of the Secret accepted by the JSON Web Signature HMAC Algorithm.
     */
    protected readonly keySize: number;
    /**
     * Instantiates a new JSON Web Signature HMAC Algorithm to Sign and Verify Messages.
     *
     * @param keySize Size of the Secret accepted by the JSON Web Signature HMAC Algorithm.
     */
    constructor(keySize: number);
    /**
     * Signs a Message with the provided JSON Web Key.
     *
     * @param message Message to be Signed.
     * @param key JSON Web Key used to Sign the provided Message.
     * @returns Resulting Signature of the provided Message.
     */
    sign(message: Buffer, key: JsonWebKey): Promise<Buffer>;
    /**
     * Checks if the provided Signature matches the provided Message based on the provide JSON Web Key.
     *
     * @param signature Signature to be matched against the provided Message.
     * @param message Message to be matched against the provided Signature.
     * @param key JSON Web Key used to verify the Signature and Message.
     */
    verify(signature: Buffer, message: Buffer, key: JsonWebKey): Promise<void>;
    /**
     * Checks if the provided JSON Web Key can be used by the JSON Web Signature HMAC Algorithm.
     *
     * @param key JSON Web Key to be checked.
     * @throws {InvalidJsonWebKeyException} The provided JSON Web Key is invalid.
     */
    protected validateJsonWebKey(key: JsonWebKey): void;
}
/**
 * HMAC using SHA-256.
 */
export declare const HS256: HmacAlgorithm;
/**
 * HMAC using SHA-384.
 */
export declare const HS384: HmacAlgorithm;
/**
 * HMAC using SHA-512.
 */
export declare const HS512: HmacAlgorithm;
export {};