/**
 * @license
 * Copyright 2020 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
import { PbKeyTemplate } from '../internal/proto';
/**
 * Pre-generated KeyTemplates for keys for hybrid encryption.
 *
 * One can use these templates to generate new Keyset with
 * KeysetHandle.generateNew method. To generate a new keyset that contains a
 * single EciesAeadHkdfKey, one can do:
 *
 * HybridConfig.Register();
 * KeysetHandle handle = KeysetHandle.generateNew(
 *     HybridKeyTemplates.eciesP256HkdfHmacSha256Aes128Gcm());
 *
 * @final
 */
export declare class HybridKeyTemplates {
    /**
     * Returns a KeyTemplate that generates new instances of
     * EciesAeadHkdfPrivateKey with the following parameters:
     *
     *   KEM: ECDH over NIST P-256
     *   DEM: AES128-GCM
     *   KDF: HKDF-HMAC-SHA256 with an empty salt
     *   OutputPrefixType: TINK
     *
     */
    static eciesP256HkdfHmacSha256Aes128Gcm(): PbKeyTemplate;
    /**
     * Returns a KeyTemplate that generates new instances of
     * EciesAeadHkdfPrivateKey with the following parameters:
     *
     *   KEM: ECDH over NIST P-256
     *   DEM: AES128-CTR-HMAC-SHA256 with
     *        - AES key size: 16 bytes
     *        - AES CTR IV size: 16 bytes
     *        - HMAC key size: 32 bytes
     *        - HMAC tag size: 16 bytes
     *   KDF: HKDF-HMAC-SHA256 with an empty salt
     *   OutputPrefixType: TINK
     *
     */
    static eciesP256HkdfHmacSha256Aes128CtrHmacSha256(): PbKeyTemplate;
}