/**
 * @license
 * Copyright 2020 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
import { PublicKeySign } from '../signature/internal/public_key_sign';
import * as EllipticCurves from './elliptic_curves';
/**
 * Implementation of ECDSA signing.
 *
 * @final
 */
export declare class EcdsaSign extends PublicKeySign {
    private readonly key;
    private readonly hash;
    private readonly encoding;
    /**
     * @param opt_encoding The
     *     optional encoding of the signature. If absent, default is IEEE P1363.
     */
    constructor(key: CryptoKey, hash: string, opt_encoding?: EllipticCurves.EcdsaSignatureEncodingType | null);
    /**
     */
    sign(message: Uint8Array): Promise<Uint8Array>;
}
/**
 * @param opt_encoding The
 *     optional encoding of the signature. If absent, default is IEEE P1363.
 */
export declare function fromJsonWebKey(jwk: JsonWebKey, hash: string, opt_encoding?: EllipticCurves.EcdsaSignatureEncodingType | null): Promise<PublicKeySign>;