/**
 * @license
 * Copyright 2020 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
import { HybridDecrypt } from '../hybrid/internal/hybrid_decrypt';
import { EciesAeadHkdfDemHelper } from './ecies_aead_hkdf_dem_helper';
import { EciesHkdfKemRecipient } from './ecies_hkdf_kem_recipient';
import * as EllipticCurves from './elliptic_curves';
/**
 * Implementation of ECIES AEAD HKDF hybrid decryption.
 *
 * @final
 */
export declare class EciesAeadHkdfHybridDecrypt extends HybridDecrypt {
    private readonly kemRecipient_;
    private readonly hkdfHash_;
    private readonly pointFormat_;
    private readonly demHelper_;
    private readonly headerSize;
    private readonly hkdfSalt;
    /**
     * @param hkdfHash the name of the HMAC algorithm, accepted names
     *     are: SHA-1, SHA-256 and SHA-512.
     */
    constructor(recipientPrivateKey: JsonWebKey, kemRecipient: EciesHkdfKemRecipient, hkdfHash: string, pointFormat: EllipticCurves.PointFormatType, demHelper: EciesAeadHkdfDemHelper, opt_hkdfSalt?: Uint8Array);
    /**
     * Decrypts ciphertext using opt_contextInfo as info parameter of the
     * underlying HKDF.
     *
     */
    decrypt(ciphertext: Uint8Array, associatedData?: Uint8Array): Promise<Uint8Array>;
    private getAead;
}
/**
 * @param hkdfHash the name of the HMAC algorithm, accepted names
 *     are: SHA-1, SHA-256 and SHA-512.
 */
export declare function fromJsonWebKey(recipientPrivateKey: JsonWebKey, hkdfHash: string, pointFormat: EllipticCurves.PointFormatType, demHelper: EciesAeadHkdfDemHelper, opt_hkdfSalt?: Uint8Array): Promise<HybridDecrypt>;