/**
 * @license
 * Copyright 2023 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
import { PbKeyTemplate } from '../../../internal/proto';
/**
 * Pre-generated KeyTemplates for keys for HPKE.
 *
 * One can use these templates to generate new Keyset with
 * KeysetHandle.generateNew method. To generate a new keyset that contains a
 * single HpkeKey, one can do:
 *
 * HybridConfig.Register();
 * KeysetHandle handle = KeysetHandle.generateNew(
 *     hpkeP256HkdfSha256Aes128Gcm());
 */
/**
 * Returns a KeyTemplate that generates new instances of
 * HpkePrivateKey with the following parameters:
 *
 *   KEM: DHKEM_P256_HKDF_SHA256
 *   KDF: HKDF_SHA256
 *   AEAD: AES_128_GCM
 *   OutputPrefixType: RAW
 */
export declare function hpkeP256HkdfSha256Aes128GcmRaw(): PbKeyTemplate;
/**
 * Returns a KeyTemplate that generates new instances of
 * HpkePrivateKey with the following parameters:
 *
 *   KEM: DHKEM_P256_HKDF_SHA256
 *   KDF: HKDF_SHA256
 *   AEAD: AES_128_GCM
 *   OutputPrefixType: TINK
 */
export declare function hpkeP256HkdfSha256Aes128Gcm(): PbKeyTemplate;
/**
 * Returns a KeyTemplate that generates new instances of
 * HpkePrivateKey with the following parameters:
 *
 *   KEM: DHKEM_P256_HKDF_SHA256
 *   KDF: HKDF_SHA256
 *   AEAD: AES_256_GCM
 *   OutputPrefixType: RAW
 */
export declare function hpkeP256HkdfSha256Aes256GcmRaw(): PbKeyTemplate;
/**
 * Returns a KeyTemplate that generates new instances of
 * HpkePrivateKey with the following parameters:
 *
 *   KEM: DHKEM_P256_HKDF_SHA256
 *   KDF: HKDF_SHA256
 *   AEAD: AES_256_GCM
 *   OutputPrefixType: TINK
 */
export declare function hpkeP256HkdfSha256Aes256Gcm(): PbKeyTemplate;
/**
 * Returns a KeyTemplate that generates new instances of
 * HpkePrivateKey with the following parameters:
 *
 *   KEM: DHKEM_P521_HKDF_SHA512
 *   KDF: HKDF_SHA256
 *   AEAD: AES_256_GCM
 *   OutputPrefixType: RAW
 */
export declare function hpkeP521HkdfSha512Aes256GcmRaw(): PbKeyTemplate;
/**
 * Returns a KeyTemplate that generates new instances of
 * HpkePrivateKey with the following parameters:
 *
 *   KEM: DHKEM_P521_HKDF_SHA512
 *   KDF: HKDF_SHA256
 *   AEAD: AES_256_GCM
 *   OutputPrefixType: TINK
 */
export declare function hpkeP521HkdfSha512Aes256Gcm(): PbKeyTemplate;